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• Silverlight on Windows Phone

  This was a great announcement last week at MIX10: the programming model for the upcoming Windows Phone 7 is Silverlight!   For now it is Silverlight 3, with the possibility to use phone specific features: orientation location & map control (GPS) mic push notifications motion detection accelerometer compass light proximity contacts So we have the same programming model we already know, develop in Visual Studio, test with the built-in emulator or deploy...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How is this paradigm/style called?

  - by McMannus

  I have the following situation: I'm developing an add-in for a UML modeling tool. The models that can be created by the user are stored inside the main application and a limited access to the models is given through its API. However, the add-in has a lot of callbacks for events that are triggered by the main application, when changes to the model occur by the user. Since the models are already stored once in the main application, I considered it not practicable to duplicate the models in the add-in, which leads to the fact that I have only behavior in the add-in, rather than having a state. This behavior is mainly expressed by static functions, that are organized in functional cohesive classes. The callbacks for the events have always references to the model elements relevant for the specifc event that ocurred. First, it seemed to me that this is a procedural style in general, but procedural style doesn't consider events/callbacks, so this boils down to the question. How is this programming style called?

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• Validation in Linq to SQL and ASP.NET

  In this article, I will show how to add business rules to Linq to SQL data model default set of schemas.

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• WPF x FileExplorer x MVVM

  This article describe how to construct FileExplorer controls included DirectoryTree and FileList, using Model-View-ViewModel (MVVM) pattern.

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• Who Wants UC as a Service?

  Atlanta-based Cypress Communications, sensing the time is ripe, is pioneering a hosted model for unified communications.

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• ??????????????JSF2????Web????????????Java Developers Workshop 2012 Summer????

  - by ???02

  ???WebLogic Server 12c?????Java EE 6????1???Web??????????????????????JavaServer Faces 2(JSF2)????????????????????????????????????????8???????Java Developers Workshop 2012 Summer??????????????????Java?????????????(Fusion Middleware????????)????????????????(???) JSF2??10?????AJAX??Web?????????????? ?????? Fusion Middleware???????? ???Java?????????????? Java EE 6????Web?????????????·????????????JSF2??Struts???Java EE???????Web????????·????????????????????????????????????????JSF2????????????Web??????????????UI??????????????????????????? ??????????Java EE?????????????????????????????????Java EE 6?JSF2??????????????????“????????”?????????????Java EE 6???????????????????????JSF2????????·???????????????????????????????????????????????????????? ??????????????GlassFish????????NetBeans???????????????????????????????????????11??????????????????????????????????????????(???)???? ???????????????????Web?????????????????????????????????????????????????????????????? ????AJAX???????????????????????????????????????????????????·????????????????????????? ????????????????NetBeans???????????????????????????????????????????????????·?????????????????????????????????????????????? ???????????????????????JSF2?????????AJAX???????????·??????????????????????????????????????????????????????????????Web????????????????????AJAX????????????JSF???????????1?????????? ?Java EE????????????????????????????Java EE 6??AJAX??????????????????????????????????????XML???????????NetBeans?????IDE???????????????????????????????????(???) ???????·?????????????????????? JSF 2????????????????????????Web??????(?????)?????????????????????????????3???????????? ??????????Visual Basic?JavaFX?????????????·????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? JSF2???MVC??????HTTP???????????????????Controller???Faces Servlet?????View?????XHTML??????Model?????Managed Bean????????????? ?????View???????????JavaServer Pages(JSP)?????????????????????XHTML????????????????View???????????????????????JSP????Scriptlet???????????????????????????????????????????????????? JSF2???View?Model??????????????????????????????????????????????????????????? ?????????JSF2????????1???HTML???Web????????????????????????JSF???Web????????????????????????????????????????HTML????????????????????????HTML 4.0?DHTML???????????????????????JavaScript??????????????????????JavaScript???????????Web?????????resources???????????????????????JSF2?????????????????Web??????????????? ????????????????????????????????????????????????·???????Web?????????????????????????????????????? ?????????????????????????????????????????????????????????????????????????? ????JSF???????????????????????????????????????????? ????JSP?????????????????????????????????????????????????????HTML????Web??????????????????????????????????JSP?Web???????????????????????????????????????????????????XHTML????JSF????????View???JSF2?????????????????????????????????????/??????????? JSF???????????????? ????????????????????????JSF?????????????????????????????????JSF2????????????????????????????????????? Web?????????????????XHTML????????JSF?Facelets?Web???(View)???UIComponent?????????? ??View?????????????????????????????View(UIComponent???)?????? ??????View?????????????????????? ???????????????Bean Validation????????????????????? ???JSF2??@FacesValidator??????????????????????????????????????????????????Validator?implements??????validate????????????????????????????????????????????????? ????????????????Model?POJO????????????????ManagedBean?JPA Entity?????????Value?????????????????????????Component??????????????????Component?????????????????1????????????????????????????????????????????? JSF2??????????????????JSF 1.2???????????·????XML?????????????????JSF2?????????????????????????????????????????????????????????? ???JSF???Web?????????????????????ManagedBean?CDI(Contexts and Dependency Injection)???POJO????????????????????????????????????????????????????????????????????????ManagedBean???????????????????????????????????????????????????????????????????????? ??????????????????????JSF???????????????????????????????????????JSF2??????????????????????????????????????????????? ????????????????JSF?Web??????????????????????????????????????·????????????????????????????JSF????????????????????????????????????????????????????????????????

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• Java???????·????????Java EE????JAX-RS 2.0??????Java Developers Workshop 2012 Summer????

  - by ???02

  ???Java??????????????????1?????“GlassFish Guy”??????????????·????????????·????????????8???????Java Developers Workshop 2012 Summer???????????????Java EE????2??????????????????????????????????(???) Java EE??????“????·?????”????? ??????·?????????Java????????????·???? Java??????????????????????????????Java??????????Java????????·????????????????????????????????Java????????Java EE 7?JAX-RS?????????????????? 1?????????Java EE 7 and HTML5: Developing for the Cloud????????Java EE??????????????·?????????????????????????????????? Java EE?????????2009?10?????????Java EE 6??????????????????????????4,000????????????????17?????????·????Java EE 6??????????????Java EE 6?????????????????????Java EE 6??????10??????? ?????????????????WAR???????????EJB??? ????Java EE???EJB????·???????????????????????????·???????(DD)?????????????????????Java EE 6????????????EJB?“?????”?????????POJO????????????????EJB????????????????????POJO?WAR??????????????????????DD???????????????????????????????????????(????) ??1??????????????????CDI(Context Dependency Injection)????DI????Java EE 5??????????????????????????????????Java EE 6?CDI???????????·?????????????DI???????????????????Spring Framework??????????????????????????Java EE???DI??????????????????????? ????????????Java EE????????????????????????????Amazon Web Services?Windows Azure????IaaS?Google App Engine????PaaS?Salesforce.com????SaaS?????????????????????·?????????????????????????????????????????????????????????????? ????????Java EE???????????????????????????????Java EE?????????????????·????????????Java EE??????????????????????????????????????????·?????????????? ??????????????????Java EE 7??????????????Java EE 8??????·??????????????????????????HTML5??3???????????????????????????????????????????????????????????????? ?????Java EE???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ?????Cloud Application Service(??)??????????????????????????????????????????????????????????????????????????????? ???HTML5??????“Web??????·??????”????JSON?WebSockets??????????????Java EE???????????????Web????????????????????????WebSocket???????????????????????·?????????????WebSocket?????Java EE????????????????????????????? ???Java EE 7????????API????????????????????? ??????????????????·?????????????????????·????????????????????????????5??API??Java EE 7??????????????????????????????????????????????????????????????????????????????????????????????????????????????????(????)???? Java EE 7?????????????????API????????????????????????????2013??2??????????????????????????????????????????????????????????????????Web???(http://javaee-spec.java.net/)???????????????????????????????? ??????????Project Avatar???????????Project Avatar??????????Java????????????????????????????Java????????????HTML5???????????????????????????HTML?Java???????????????????????Java EE???????????????????????????????? JAX-RS 2.0?Java??????????????????? ???????2?????????JAX-RS 2.0: RESTful Java on Steroids???Java????RESTful?????????????API???JAX-RS?????Java EE 7???????JAX-RS 2.0???????????????????????????????? ?????????“RESTful”???????????????????? ????????????????????????????? ?????????????? ???????????????? ??????????????(??)??? ????????????????????(?????????????????) ????Java EE????????API?????????????JAX-RS 1.0??JAX-RS 1.0???POJO????API???HTTP??????????????????????????????????????????????? ????????????JAX-RS 2.0???????????8??????????/???????????? ?Client API ?Client-side and Server-side Asynchronous ?Filters and Interceptors ?Improved Connection Negotiation ?Validation ?Hypermedia ?Alignment with JSR 330 ?Model-View-Controller JAX-RS 2.0??????????????·????????????????????Model-View-Controller?????????????????????Model-View-Controller?????????JSF????MVC???????????????JAX-RS???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ???Client API???????????????HTTP??????·????????????????????????API???????????????JAX-RS 2.0?Client API???JAX-RS?????API??????????????Java EE?????????????REST??????????????????? ?Filters&Interceptors????????????????????????JAX-RS??????????????????JAX-RS 1.0???????????JAX-RS 2.0??????????????????????? ?Asynchronus??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ?Connect Negotiation???Validation???????????????????????Validation????????????????Bean Validation?????JAX-RS?????????????????????????? ?Hypermedia???????????????????Web???????????????????HATEOAS(Hypermedia As The Engine Of App State)?????JAX-RS????????????????????????????????Asynchronus???????????????????????????? JAX-RS 2.0???????????JSR 330:Dependency Injection for Java???????????????????Client API??????????????????????????????????????JAX-RS 2.0??????????????????????Web???????????·??????????(http://jcp.org/en/jsr/detail?id=339)????????????????????????????????????????

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• How do I display a Wicket Datatable, sorted by a specific column by default?

  - by David

  Hello everyone! I have a question regarding Wicket's Datatable. I am currently using DataTable to display a few columns of data. My table is set up as follows: DataTable<Column> dataTable = new DataTable<Column>("columnsTable", columns, provider, maxRowsPerPage) { @Override protected Item<Column> newRowItem(String id, int index, IModel<Column> model) { return new OddEvenItem<Column>(id, index, model); } }; The columns look like so: columns[0] = new PropertyColumn<Column>(new Model<String>("Description"), "description", "description"); columns[1] = new PropertyColumn<Column>(new Model<String>("Logic"), "columnLogic"); columns[2] = new PropertyColumn<Column>(new Model<String>("Type"), "dataType", "dataType"); Here is my column data provider: public class ColumnSortableDataProvider extends SortableDataProvider<Column> { private static final long serialVersionUID = 1L; private List<Column> list = null; public ColumnSortableDataProvider(Table table) { this.list = Arrays.asList(table.getColumns().toArray(new Column[0])); } public ColumnSortableDataProvider(List<Column> list) { this.list = list; } @Override public Iterator<? extends Column> iterator(int first, int count) { /* first - first row of data count - minimum number of elements to retrieve So this method returns an iterator capable of iterating over {first, first+count} items */ Iterator<Column> iterator = null; try { if(getSort() != null) { Collections.sort(list, new Comparator<Column>() { private static final long serialVersionUID = 1L; @Override public int compare(Column c1, Column c2) { int result=1; PropertyModel<Comparable> model1= new PropertyModel<Comparable>(c1, getSort().getProperty()); PropertyModel<Comparable> model2= new PropertyModel<Comparable>(c2, getSort().getProperty()); if(model1.getObject() == null && model2.getObject() == null) result = 0; else if(model1.getObject() == null) result = 1; else if(model2.getObject() == null) result = -1; else result = ((Comparable)model1.getObject()).compareTo(model2.getObject()); result = getSort().isAscending() ? result : -result; return result; } }); } if (list.size() > (first+count)) iterator = list.subList(first, first+count).iterator(); else iterator = list.iterator(); } catch (Exception e) { e.printStackTrace(); } return iterator; } Sorting by clicking a column works perfectly, but I would like the table to initially be sorted, by default, by the Description column. I am at a loss to do this. If you need to see some other code, please let me know. Thank you in advance!!! - D

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• How do I use accepts_nested_attributes_for?

  - by Angela

  Editing my question for conciseness and to update what I've done: How do I model having multiple Addresses for a Company and assign a single Address to a Contact, and be able to assign them when creating or editing a Contact? I want to use nested attributes to be able to add an address at the time of creating a new contact. That address exists as its own model because I may want the option to drop-down from existing addresses rather than entering from scratch. I can't seem to get it to work. I get a undefined method `build' for nil:NilClass error Here is my model for Contacts: class Contact < ActiveRecord::Base attr_accessible :first_name, :last_name, :title, :phone, :fax, :email, :company, :date_entered, :campaign_id, :company_name, :address_id, :address_attributes belongs_to :company belongs_to :address accepts_nested_attributes_for :address end Here is my model for Address: class Address < ActiveRecord::Base attr_accessible :street1, :street2, :city, :state, :zip has_many :contacts end I would like, when creating an new contact, access all the Addresses that belong to the other Contacts that belong to the Company. So here is how I represent Company: class Company < ActiveRecord::Base attr_accessible :name, :phone, :addresses has_many :contacts has_many :addresses, :through => :contacts end Here is how I am trying to create a field in the View for _form for Contact so that, when someone creates a new Contact, they pass the address to the Address model and associate that address to the Contact: <% f.fields_for :address, @contact.address do |builder| %> <p> <%= builder.label :street1, "Street 1" %> </br> <%= builder.text_field :street1 %> <p> <% end %> When I try to Edit, the field for Street 1 is blank. And I don't know how to display the value from show.html.erb. At the bottom is my error console -- can't seem to create values in the address table: My Contacts controller is as follows: def new @contact = Contact.new @contact.address.build # Iundefined method `build' for nil:NilClass @contact.date_entered = Date.today @campaigns = Campaign.find(:all, :order => "name") if params[:campaign_id].blank? else @campaign = Campaign.find(params[:campaign_id]) @contact.campaign_id = @campaign.id end if params[:company_id].blank? else @company = Company.find(params[:company_id]) @contact.company_name = @company.name end end def create @contact = Contact.new(params[:contact]) if @contact.save flash[:notice] = "Successfully created contact." redirect_to @contact else render :action => 'new' end end def edit @contact = Contact.find(params[:id]) @campaigns = Campaign.find(:all, :order => "name") end Here is a snippet of my error console: I am POSTING the attribute, but it is not CREATING in the Address table.... Processing ContactsController#create (for 127.0.0.1 at 2010-05-12 21:16:17) [POST] Parameters: {"commit"="Submit", "authenticity_token"="d8/gx0zy0Vgg6ghfcbAYL0YtGjYIUC2b1aG+dDKjuSs=", "contact"={"company_name"="Allyforce", "title"="", "campaign_id"="2", "address_attributes"={"street1"="abc"}, "fax"="", "phone"="", "last_name"="", "date_entered"="2010-05-12", "email"="", "first_name"="abc"}} Company Load (0.0ms)[0m [0mSELECT * FROM "companies" WHERE ("companies"."name" = 'Allyforce') LIMIT 1[0m Address Create (16.0ms)[0m [0;1mINSERT INTO "addresses" ("city", "zip", "created_at", "street1", "updated_at", "street2", "state") VALUES(NULL, NULL, '2010-05-13 04:16:18', NULL, '2010-05-13 04:16:18', NULL, NULL)[0m Contact Create (0.0ms)[0m [0mINSERT INTO "contacts" ("company", "created_at", "title", "updated_at", "campaign_id", "address_id", "last_name", "phone", "fax", "company_id", "date_entered", "first_name", "email") VALUES(NULL, '2010-05-13 04:16:18', '', '2010-05-13 04:16:18', 2, 2, '', '', '', 5, '2010-05-12', 'abc', '')[0m

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• ListBoxFor not populating with selected items

  - by user576838

  I've see this question asked a couple of other times, and I followed this after I tried things on my own with the MS music store demo to no avail, but I still can't get this to work. I've also noticed when I look at my MultiSelectList object in the viewmodel, it has the correct items in the selected items property, but if I expand the results view, it doesn't have any listboxitem with the selected value. What am I missing here? I feel like I'm taking crazy pills! Thanks in advance. model: public class Article { public int ArticleID { get; set; } public DateTime? DatePurchased { get; set; } public DateTime? LastWorn { get; set; } public string ThumbnailImg { get; set; } public string LargeImg { get; set; } public virtual List<Outfit> Outfits { get; set; } public virtual List<Tag> Tags { get; set; } } viewmodel: public class ArticleViewModel { public int ArticleID { get; set; } public List<Tag> Tags { get; set; } public MultiSelectList mslTags { get; set; } public virtual Article Article { get; set; } public ArticleViewModel(int ArticleID) { using (ctContext db = new ctContext()) { this.Article = db.Articles.Find(ArticleID); this.Tags = db.Tags.ToList(); this.mslTags = new MultiSelectList(this.Tags, "TagID", "Name", this.Article.Tags); } } } controller: public ActionResult Index() { ArticleIndexViewModel vm = new ArticleIndexViewModel(db); return View(vm); } view: @model ClosetTracker.ArticleViewModel @using (Html.BeginForm()) { <img id="bigImg" src="@Model.Article.ThumbnailImg" alt="img" /> @Html.HiddenFor(m => m.ArticleID); @Html.LabelFor(m => m.Article.Tags) @* @Html.ListBoxFor(m => m.Article.Tags, Model.Tags.Select(t => new SelectListItem { Text = t.Name, Value = t.TagID.ToString() }), new { Multiple = "multiple" }) *@ @Html.ListBoxFor(m => m.Article.Tags, Model.mslTags); @Html.LabelFor(m => m.Article.LastWorn) @Html.TextBoxFor(m => m.Article.LastWorn, new { @class = "datepicker" }) @Html.LabelFor(m => m.Article.DatePurchased) @Html.TextBoxFor(m => m.Article.DatePurchased, new { @class = "datepicker" }) <p> <input type="submit" value="Save" /> </p> } EDITED Ok, I changed around the constructor of the MultiSelectList to have a list of TagID in the selected value arg instead of a list of Tag objects. This shows the correct tags as selected in the results view when I watch the mslTags object in debug mode. However, it still isn't rendering correctly to the page. public class ArticleViewModel { public int ArticleID { get; set; } public List<Tag> Tags { get; set; } public MultiSelectList mslTags { get; set; } public virtual Article Article { get; set; } public ArticleViewModel(int ArticleID) { using (ctContext db = new ctContext()) { this.Article = db.Articles.Find(ArticleID); this.Tags = db.Tags.ToList(); this.mslTags = new MultiSelectList(this.Tags, "TagID", "Name", this.Article.Tags.Select(t => t.TagID).ToList()); } } }

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• CFStrings and storing them into models, related topics

  - by Jasconius

  I have a very frustrating issue that I believe involves CFStringRef and passing them along to custom model properties. The code is pretty messy right now as I am in a debug state, but I will try to describe the problem in words as best as I can. I have a custom model, User, which for irrelevant reasons, I am storing CF types derived from the Address Book API into. Examples include: Name, email as NSStrings. I am simply retrieving the CFStringRef value from the AddressBook API and casting as a string, whereupon I assign to the custom model instance and then CFRelease the string. These NSString properties are set as (nonatomic, retain). I then store this model into an NSArray, and I use this Array as a datasource for a UITableView When accessing the object in the cellForRowAtIndexPath, I get a memory access error. When I do a Debug, I see that the value for this datasource array appears at first glance to be corrupted. I've seen strange values assigned to it, including just plain strings, such as one that I fed to an NSLog function in earlier in the method. So, the thing that leads me to believe that this is Core Foundation related is that I am executing this exact same code, in the same class even, on non-Address Book data, in fact, just good old JSON parsed strings, which produce true Cocoa NSStrings, that I follow the same exact steps to create the datasource array. This code works fine. I have a feeling that my (retain) property declaration and/or my [stringVar release] in my custom model dealloc method may be causing memory problems (since it is my understanding that you shouldn't call a Cocoa retain or release on a CF object). Here is the code. I know some of this is super-roundabout but I was trying to make things as explicit as possible for the sake of debugging. NSMutableArray *friendUsers = [[NSMutableArray alloc] init]; int numberOfPeople = CFArrayGetCount(people); for (int i = 0; i < numberOfPeople; i++) { ABMutableMultiValueRef emails = ABRecordCopyValue(CFArrayGetValueAtIndex(people, i), kABPersonEmailProperty); if (ABMultiValueGetCount(emails) > 0) { User *addressContact = [[User alloc] init]; NSString *firstName = (NSString *)ABRecordCopyValue(CFArrayGetValueAtIndex(people, i), kABPersonFirstNameProperty); NSString *lastName = (NSString *)ABRecordCopyValue(CFArrayGetValueAtIndex(people, i), kABPersonLastNameProperty); NSLog(@"%@ and %@", firstName, lastName); NSString *fullName = [NSString stringWithFormat:@"%@ %@", firstName, lastName]; NSString *email = [NSString stringWithFormat:@"%@", (NSString *)ABMultiValueCopyValueAtIndex(emails, 0)]; NSLog(@"the email: %@", email); [addressContact setName:fullName]; [addressContact setEmail:email]; [friendUsers addObject:addressContact]; [firstName release]; [lastName release]; [email release]; [addressContact release]; } CFRelease(emails); } NSLog(@"friend count: %d", [friendUsers count]); abFriends = [NSArray arrayWithArray:friendUsers]; [friendUsers release]; All of that works, every logging statement returns as expected. But when I use abFriends as a datasource, poof. Dead. Is my approach all wrong? Any advice?

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• Jquery validation in asp.net mvc

  - by Suja

  I have a view to create a DocumentTemplate <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" % <%@ Import Namespace="HexsolveMVC.Helpers" % Create <script type="text/javascript"> $(document).ready(function() { $("#reset").click(function(event) { $("#Part").get(0).selectedIndex = 0; $("#txtDocTitle").val(""); $("#txtarDocDesc").val(""); }); }); }); </script> <div class="container"> <div class="outer"> <div class="main_content"> <div> <%=Html.BreadCrumb(Model.BreadCrumbs)%> </div> <div class="form_container"> <h1> Document Template</h1> <ul> <li> <label> <span class="mandatory">*</span>Engine model:</label> <%=Html.DropDownList("Part", (SelectList)ViewData["Part"])%> <span class="tagline">Please select the engine model <%--<a href="#">Need Help</a>--%></span> </li> <li> <label> <span class="mandatory">*</span>Document Title:</label> <input id="txtDocTitle" name="docTitle" type="text" class="formstyle" /> </li> <li> <label> Discription:</label> <textarea name="docDesc" id="txtarDocDesc" cols="45" rows="5"></textarea> </li> <li> <div class="button_panel"> <input name="button" type="submit" class="btn_create_doc_big" id="button" value="Create" /> <span class="reset_field"><a href="#" id="reset">Reset the form</a></span><span class="mandatory_tag">[ <span class="mandatory">*</span> Mandatory fields ]</span> <div class="clear"> </div> </div> <span class="tagline">By clicking on '<span class="tagline_highlight">Create</span>' button your document will be created.<br /> And after you can add new instructions and subsections easily.</span></li> </ul> <div> <h2> Example of how to work a document </h2> <img alt="" src="../../html/images/diagram.jpg" width="738" height="172" /></div> </div> </div> <div class="clear"> </div> </div> </div> I need to validate the txtDocTitle since its a required field. How can i do this using jQuery. I cannot use Model validation coz this same model is used for other views also and it have properties from other tables. I need something to do with jQuery.

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• insert xml into sql server

  - by JonDog

  ok, so I know there are a bunch of other post on importing xml to sql server but I just cant seem to figure it out. I think my problem may have to do with having multi-levels. Can anyone help please. My xml, sql table, and the code i've tried. thanks in advance. <items> <item> <sku> <value> the_sku </value> </sku> <short_dis2> <value> short_discription2 <value/> </short_dis2> <short_dis1> <value> short_discription1 </value> </short_dis1> <title> <value> product_title </value> </title> <detailSpec> <value> detailed_specification_html </value> </detailSpec> <basicSpec> <value> basic_overview_html </value> </basicSpec> <basicSpecHeading> <value> besic_spec_heading </value> </basicSpecHeading> <detailSpecHeading> <value> detailed_specifications_heading </value> </detailSpecHeading> <model> <value> the_model_number </value> </model> <image_file_name> <value> the_image_url </value> </image_file_name> </item> ... CREATE TABLE [dbo].[products]( [sku] [nchar](15) NOT NULL, [model] [nvarchar](50) NULL, [title] [ntext] NULL, [short_dis1] [ntext] NULL, [short_dis2] [ntext] NULL, [basicSpecHeading] [ntext] NULL, [basicSpec] [ntext] NULL, [detailSpecHeading] [ntext] NULL, [detailSpec] [ntext] NULL, [image_file_name] [nchar](100) NULL INSERT INTO products (sku, short_dis2,short_dis1,title,detailSpec,basicSpec,basicSpecHeading,detailSpecHeading,model,image_file_name) SELECT X.product.query('sku').value('.', 'nchar(15)'), X.product.query('short_dis2').value('.', 'nvarchar(max)'), X.product.query('short_dis1').value('.', 'nvarchar(max)'), X.product.query('title').value('.', 'nvarchar(max)'), X.product.query('detailSpec').value('.', 'nvarchar(max)'), X.product.query('basicSpec').value('.', 'nvarchar(max)'), X.product.query('basicSpecHeading').value('.', 'nvarchar(max)'), X.product.query('detailSpecHeading').value('.', 'nvarchar(max)'), X.product.query('model').value('.', 'nvarchar(max)'), X.product.query('image_file_name').value('.', 'nvarchar(max)') FROM ( SELECT CAST(x AS XML) FROM OPENROWSET( BULK 'C:\users\me\desktop\xml_sample.xml', SINGLE_BLOB) AS T(x) ) AS T(x) CROSS APPLY x.nodes('Products/Product') AS X(product);

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• jsf submit button not wrking

  - by tejas-a

  I am using hx:commandExButton of IBM Faces Client Framework to call my method. But the method is not getting called. But if I use immediate="true" it's getting called. But as you all know with this my model won't get updated, so it has no use to me. Has anyone faced this? Check the hx:commandExButton id="btnSearch" <%-- tpl:metadata --%> <%-- jsf:pagecode language="java" location="/src/pagecode/view/costestimation/SearchAssignee.java" --%><%-- /jsf:pagecode --%> <%-- /tpl:metadata --%> <%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%><%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%><%@taglib uri="http://www.ibm.com/jsf/html_extended" prefix="hx"%><%@taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet"%><%@taglib uri="http://www.ibm.com/xmlns/prod/websphere/portal/v6.1/portlet-client-model" prefix="portlet-client-model"%><%@page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%><portlet-client-model:init> <portlet-client-model:require module="ibm.portal.xml.*" /> <portlet-client-model:require module="ibm.portal.portlet.*" /> </portlet-client-model:init> <portlet:defineObjects /> <link rel="stylesheet" type="text/css" title="Style" href="../../theme/stylesheet.css"> <f:view> <f:loadBundle var="giamsBundle" basename="com.ibm.costprojectionportlet.nl.GIAMSResourceBundle" /> <hx:viewFragment id="viewFragment1"> <hx:scriptCollector id="scriptCollector1"> <script language="JavaScript" src='<%=renderResponse.encodeURL(renderRequest .getContextPath() + "/js/common.js")%>'></script> <h:outputText value="<br/>" escape="false" /> <h:outputText id="titleSearch" styleClass="outputText" value="#{giamsBundle['title.search']}" escape="false"></h:outputText> <h:outputText value="<br/>" escape="false" /> <h:messages style="font-weight:bold;color:red;" layout="table"></h:messages> <hx:panelSection styleClass="panelSection" title="SearchCriteria" id="searchCriteriaPanel" initClosed="false" style="border-width: thin; border-style: groove"> <h:form styleClass="form" id="searchCriteriaForm"> <h:messages style="font-weight:bold;color:red;" layout="table"></h:messages> <h:panelGrid columns="2" cellpadding="1" border="0" width="100%"> <h:column> <hx:panelFormBox helpPosition="over" labelPosition="left" styleClass="panelFormBox" id="formBoxLeft"> <hx:formItem styleClass="formItem" id="frmLastName" label="#{giamsBundle['lbl.search.lastname']}" escape="false"> <h:inputText styleClass="inputText" size="20" id="txtLastName" value="#{pc_SearchAssignee.assignee.lastName}"> </h:inputText> </hx:formItem> <hx:formItem styleClass="formItem" id="frmHomeCountrySerial" label="#{giamsBundle['lbl.search.homecountryserial']}" escape="false"> <h:inputText styleClass="inputText" size="20" id="txtHomeCountrySerial" value="#{pc_SearchAssignee.assignee.companyDetails.homeCountrySerial}"> </h:inputText> </hx:formItem> <hx:formItem styleClass="formItem" id="frmHomeCountry" label="#{giamsBundle['lbl.search.homecountry']}" escape="false"> <h:selectOneMenu styleClass="selectOneMenu" id="ddHomeCountry" value=""> <f:selectItems value="#{pc_referenceData.telephoneTypeList}" /> </h:selectOneMenu> </hx:formItem> <hx:formItem styleClass="formItem" id="frmHomeBusinessUnit" label="#{giamsBundle['lbl.search.homebusunit']}" escape="false"> <h:selectOneMenu styleClass="selectOneMenu" value="" id="ddHomeBusinessUnit"> <f:selectItems value="#{pc_referenceData.telephoneTypeList}" /> </h:selectOneMenu> </hx:formItem> <hx:formItem styleClass="formItem" id="frmforButtons" label="" escape="false"> <h:panelGroup> <hx:commandExButton styleClass="commandExButton" id="btnSearch" value="#{giamsBundle['btn.search']}" action="#{pc_SearchAssignee.searchAssignee}"> </hx:commandExButton> <hx:commandExButton styleClass="commandExButton" id="btnCancel" value="#{giamsBundle['btn.cancel']}" action="#{pc_SearchAssignee.searchAssignee}"> </hx:commandExButton> </h:panelGroup> </hx:formItem> </hx:panelFormBox> </h:column> <h:column> <hx:panelFormBox helpPosition="over" labelPosition="left" styleClass="panelFormBox" id="formBoxRight"> <hx:formItem styleClass="formItem" id="frmFirstName" label="#{giamsBundle['lbl.search.firstname']}" escape="false"> <h:inputText styleClass="inputText" size="20" id="txtFirstName" value="#{pc_SearchAssignee.assignee.firstName}"> </h:inputText> </hx:formItem> <hx:formItem styleClass="formItem" id="frmHomeNotesEmail" label="#{giamsBundle['lbl.search.homenotesemail']}" escape="false"> <h:panelGroup> <h:inputText styleClass="inputText" size="20" id="txtHomeNotesEmail" value="#{pc_SearchAssignee.assignee.lotusNotesId}"> </h:inputText> </h:panelGroup> </hx:formItem> <hx:formItem styleClass="formItem" id="frmHomeLocation" label="#{giamsBundle['lbl.search.homeloc']}" escape="false"> <h:inputText styleClass="inputText" size="20" id="txtHomeLocation" value="#{pc_SearchAssignee.assignee.homeAddress.cityName}"> </h:inputText> </hx:formItem> <hx:formItem styleClass="formItem" id="blank" label="" escape="false"> <h:outputText id="txtblank" escape="false"></h:outputText> </hx:formItem> </hx:panelFormBox> </h:column> </h:panelGrid> </h:form> <f:facet name="opened"> <hx:jspPanel id="jspPanelMainOpen"> <hx:graphicImageEx id="imageExMainOpen" styleClass="graphicImageEx" align="middle" value="/theme/img/form_header.GIF" width="100%" height="20"></hx:graphicImageEx> </hx:jspPanel> </f:facet> </hx:panelSection> <h:outputText id="titleResults" styleClass="outputText" value="#{giamsBundle['lbl.search.results']}" escape="false"></h:outputText> <h:outputText value="<br/>" escape="false" /> <hx:dataTableEx border="0" cellspacing="2" width="100%" columnClasses="columnClass1" headerClass="headerClass" footerClass="footerClass" rowClasses="rowClass1, rowClass2" styleClass="dataTableEx" id="searchAssignee" value="#{pc_SearchAssignee.assigneeList}" var="searchitr" binding="#{pc_SearchAssignee.searchDataTable}" rendered="#{pc_SearchAssignee.render}"> <hx:columnEx id="columnEx1"> <f:facet name="header"> <hx:panelBox styleClass="panelBox" id="selectPanelBox"> <hx:outputSelecticons styleClass="outputSelecticons" id="selectCheckBox"></hx:outputSelecticons> </hx:panelBox> </f:facet> <hx:inputRowSelect styleClass="inputRowSelect" value="#{searchitr.selected}" id="rowSelect"></hx:inputRowSelect> <f:facet name="header"></f:facet> </hx:columnEx> <hx:columnEx id="columnEx2"> <f:facet name="header"> <h:outputText id="lblEeId" styleClass="outputText" value="#{giamsBundle['lbl.search.eeid']}"></h:outputText> </f:facet> <h:inputText styleClass="inputText" id="dttxtEEID" value="#{searchitr.employeeID}"></h:inputText> </hx:columnEx> <hx:columnEx id="columnEx3"> <f:facet name="header"> <h:outputText id="lblFirstName" styleClass="outputText" value="#{giamsBundle['lbl.search.firstname']}"></h:outputText> </f:facet> <h:inputText styleClass="inputText" id="dttxtFirstName" value="#{searchitr.firstName}"></h:inputText> </hx:columnEx> <hx:columnEx id="columnEx4"> <f:facet name="header"> <h:outputText id="lblLastName" styleClass="outputText" value="#{giamsBundle['lbl.search.lastname']}"></h:outputText> </f:facet> <h:inputText styleClass="inputText" id="dttxtLastName" value="#{searchitr.lastName}"></h:inputText> </hx:columnEx> <hx:columnEx id="columnEx5"> <f:facet name="header"> <h:outputText id="lblHomeNotesEmail" styleClass="outputText" value="#{giamsBundle['lbl.search.homenotesemail']}"></h:outputText> </f:facet> <h:inputText styleClass="inputText" id="dttxtHomeNotesEmail" value="#{searchitr.homeAddress.addressLine1}"></h:inputText> </hx:columnEx> <hx:columnEx id="columnEx6"> <f:facet name="header"> <h:outputText id="lblHomeCountry" styleClass="outputText" value="#{giamsBundle['lbl.search.homecountry']}"></h:outputText> </f:facet> <h:inputText styleClass="inputText" id="dttxtHomeCountry" value="#{searchitr.homeAddress.addressLine1}"></h:inputText> </hx:columnEx> <hx:columnEx id="columnEx7"> <f:facet name="header"> <h:outputText id="lblHomeLocation" styleClass="outputText" value="#{giamsBundle['lbl.search.homeloc']}"></h:outputText> </f:facet> <h:inputText styleClass="inputText" id="dttxtHomeLocation" value="#{searchitr.homeTaxID}"></h:inputText> </hx:columnEx> <hx:columnEx id="columnEx8"> <f:facet name="header"> <h:outputText id="lblHomeBusUnit" styleClass="outputText" value="#{giamsBundle['lbl.search.homebusunit']}"></h:outputText> </f:facet> <h:inputText styleClass="inputText" id="dttxtHomeBusUnit" value="#{searchitr.homeTaxID}"></h:inputText> </hx:columnEx> <hx:columnEx id="columnEx9"> <f:facet name="header"> <h:outputText id="lblAssignStatus" styleClass="outputText" value="#{giamsBundle['lbl.search.assignmentstatus']}"></h:outputText> </f:facet> <h:inputText styleClass="inputText" id="dttxtAssignStatus" value="#{searchitr.homeTaxID}"></h:inputText> </hx:columnEx> </hx:dataTableEx> <h:outputText value="<br/>" escape="false" /> <hx:commandExButton type="submit" styleClass="commandExButton" rendered="#{pc_SearchAssignee.render}" id="btnContinue" value="#{giamsBundle['btn.continue']}" action="#{pc_SearchAssignee.searchAssignee}"> </hx:commandExButton> </hx:scriptCollector> </hx:viewFragment> </f:view>

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• How to call a new thread from button click

  - by Lynnooi

  Hi, I'm trying to call a thread on a button click (btn_more) but i cant get it right. The thread is to get some data and update the images. The problem i have is if i only update 4 or 5 images then it works fine. But if i load more than 5 images i will get a force close. At times when the internet is slow I will face the same problem too. Can please help me to solve this problem or provide me some guidance? Here is the error i got from LogCat: 04-19 18:51:44.907: ERROR/AndroidRuntime(1034): Uncaught handler: thread main exiting due to uncaught exception 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): java.lang.NullPointerException 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at mobile9.android.gallery.GalleryWallpapers.setWallpaperThumb(GalleryWallpapers.java:383) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at mobile9.android.gallery.GalleryWallpapers.access$4(GalleryWallpapers.java:320) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at mobile9.android.gallery.GalleryWallpapers$1.handleMessage(GalleryWallpapers.java:266) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at android.os.Handler.dispatchMessage(Handler.java:99) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at android.os.Looper.loop(Looper.java:123) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at android.app.ActivityThread.main(ActivityThread.java:4310) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at java.lang.reflect.Method.invokeNative(Native Method) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at java.lang.reflect.Method.invoke(Method.java:521) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 04-19 18:51:44.927: ERROR/AndroidRuntime(1034): at dalvik.system.NativeStart.main(Native Method) My Code: public class GalleryWallpapers extends Activity implements Runnable { public static String MODEL = android.os.Build.MODEL ; private static final String rootURL = "http://www.uploadhub.com/mobile9/gallery/c/"; private int wallpapers_count = 0; private int ringtones_count = 0; private int index = 0; private int folder_id; private int page; private int page_counter = 1; private String family; private String keyword; private String xmlURL = ""; private String thread_op = "xml"; private ImageButton btn_back; private ImageButton btn_home; private ImageButton btn_filter; private ImageButton btn_search; private TextView btn_more; private ProgressDialog pd; GalleryExampleHandler myExampleHandler = new GalleryExampleHandler(); Context context = GalleryWallpapers.this.getBaseContext(); Drawable image; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); MODEL = "HTC Legend"; // **needs to be remove after testing** try { MODEL = URLEncoder.encode(MODEL,"UTF-8"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.gallerywallpapers); Bundle b = this.getIntent().getExtras(); family = b.getString("fm").trim(); folder_id = Integer.parseInt(b.getString("fi")); keyword = b.getString("kw").trim(); page = Integer.parseInt(b.getString("page").trim()); WindowManager w = getWindowManager(); Display d = w.getDefaultDisplay(); final int width = d.getWidth(); final int height = d.getHeight(); xmlURL = rootURL + "wallpapers/1/?output=rss&afm=wallpapers&mdl=" + MODEL + "&awd=" + width + "&aht=" + height; if (folder_id > 0) { xmlURL = xmlURL + "&fi=" + folder_id; } pd = ProgressDialog.show(GalleryWallpapers.this, "", "Loading...", true, false); Thread thread = new Thread(GalleryWallpapers.this); thread.start(); btn_more = (TextView) findViewById(R.id.btn_more); btn_more.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { myExampleHandler.filenames.clear(); myExampleHandler.authors.clear(); myExampleHandler.duration.clear(); myExampleHandler.fileid.clear(); btn_more.setBackgroundResource(R.drawable.btn_more_click); page = page + 1; thread_op = "xml"; xmlURL = rootURL + "wallpapers/1/?output=rss&afm=wallpapers&mdl=" + MODEL + "&awd=" + width + "&aht=" + height; xmlURL = xmlURL + "&pg2=" + page; index = 0; pd = ProgressDialog.show(GalleryWallpapers.this, "", "Loading...", true, false); Thread thread = new Thread(GalleryWallpapers.this); thread.start(); } }); } public void run() { if(thread_op.equalsIgnoreCase("xml")){ readXML(); } else if(thread_op.equalsIgnoreCase("getImg")){ getWallpaperThumb(); } handler.sendEmptyMessage(0); } private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { int count = 0; if (!myExampleHandler.filenames.isEmpty()){ count = myExampleHandler.filenames.size(); } count = 6; if(thread_op.equalsIgnoreCase("xml")){ pd.dismiss(); thread_op = "getImg"; btn_more.setBackgroundResource(R.drawable.btn_more); } else if(thread_op.equalsIgnoreCase("getImg")){ setWallpaperThumb(); index++; if (index < count){ Thread thread = new Thread(GalleryWallpapers.this); thread.start(); } } } }; private void readXML(){ if (xmlURL.length() != 0) { try { /* Create a URL we want to load some xml-data from. */ URL url = new URL(xmlURL); /* Get a SAXParser from the SAXPArserFactory. */ SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser sp = spf.newSAXParser(); /* Get the XMLReader of the SAXParser we created. */ XMLReader xr = sp.getXMLReader(); /* * Create a new ContentHandler and apply it to the * XML-Reader */ xr.setContentHandler(myExampleHandler); /* Parse the xml-data from our URL. */ xr.parse(new InputSource(url.openStream())); /* Parsing has finished. */ /* * Our ExampleHandler now provides the parsed data to * us. */ ParsedExampleDataSet parsedExampleDataSet = myExampleHandler .getParsedData(); } catch (Exception e) { //showDialog(DIALOG_SEND_LOG); } } } private void getWallpaperThumb(){ int i = this.index; if (!myExampleHandler.filenames.elementAt(i).toString().equalsIgnoreCase("")){ image = ImageOperations(context, myExampleHandler.thumbs.elementAt(i).toString(), "image.jpg"); } } private void setWallpaperThumb(){ int i = this.index; if (myExampleHandler.filenames.elementAt(i).toString() != null) { String file_info = myExampleHandler.filenames.elementAt(i).toString(); String author = "\nby " + myExampleHandler.authors.elementAt(i).toString(); final String folder = myExampleHandler.folder_id.elementAt(folder_id).toString(); final String fid = myExampleHandler.fileid.elementAt(i).toString(); ImageView imgView = new ImageView(context); TextView tv_filename = null; TextView tv_author = null; switch (i + 1) { case 1: imgView = (ImageView) findViewById(R.id.image1); tv_filename = (TextView) findViewById(R.id.filename1); tv_author = (TextView) findViewById(R.id.author1); break; case 2: imgView = (ImageView) findViewById(R.id.image2); tv_filename = (TextView) findViewById(R.id.filename2); tv_author = (TextView) findViewById(R.id.author2); break; case 3: imgView = (ImageView) findViewById(R.id.image3); tv_filename = (TextView) findViewById(R.id.filename3); tv_author = (TextView) findViewById(R.id.author3); break; case 4: . . . . . case 10: imgView = (ImageView) findViewById(R.id.image10); tv_filename = (TextView) findViewById(R.id.filename10); tv_author = (TextView) findViewById(R.id.author10); break; } if (image.getIntrinsicHeight() > 0) { imgView.setImageDrawable(image); } else { imgView.setImageResource(R.drawable.default_wallpaper); } tv_filename.setText(file_info); tv_author.setText(author); imgView.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { // Perform action on click } }); } } private Drawable ImageOperations(Context ctx, String url, String saveFilename) { try { InputStream is = (InputStream) this.fetch(url); Drawable d = Drawable.createFromStream(is, "src"); return d; } catch (MalformedURLException e) { e.printStackTrace(); return null; } catch (IOException e) { e.printStackTrace(); return null; } } }

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• Why can I query with an int but not a string here? PHP MySQL Datatypes

  - by CT

  I am working on an Asset Database problem. I receive $id from $_GET["id"]; I then query the database and display the results. This works if my id is an integer like "93650" but if it has other characters like "wci1001", it displays this MySQL error: Unknown column 'text' in 'where clause' All fields in tables are of type: VARCHAR(50) What would I need to do to be able to use this query to search by id that includes other characters? Thank you. <?php <?php /* * ASSET DB FUNCTIONS SCRIPT * */ # connect to database function ConnectDB(){ mysql_connect("localhost", "asset_db", "asset_db") or die(mysql_error()); mysql_select_db("asset_db") or die(mysql_error()); } # find asset type returns $type function GetAssetType($id){ $sql = "SELECT asset.type From asset WHERE asset.id = $id"; $result = mysql_query($sql) or die(mysql_error()); $row = mysql_fetch_assoc($result); $type = $row['type']; return $type; } # query server returns $result (sql query array) function QueryServer($id){ $sql = " SELECT asset.id ,asset.company ,asset.location ,asset.purchaseDate ,asset.purchaseOrder ,asset.value ,asset.type ,asset.notes ,server.manufacturer ,server.model ,server.serialNumber ,server.esc ,server.warranty ,server.user ,server.prevUser ,server.cpu ,server.memory ,server.hardDrive FROM asset LEFT JOIN server ON server.id = asset.id WHERE asset.id = $id "; $result = mysql_query($sql); return $result; } # get server data returns $serverArray function GetServerData($result){ while($row = mysql_fetch_assoc($result)) { $id = $row['id']; $company = $row['company']; $location = $row['location']; $purchaseDate = $row['purchaseDate']; $purchaseOrder = $row['purchaseOrder']; $value = $row['value']; $type = $row['type']; $notes = $row['notes']; $manufacturer = $row['manufacturer']; $model = $row['model']; $serialNumber = $row['serialNumber']; $esc = $row['esc']; $warranty = $row['warranty']; $user = $row['user']; $prevUser = $row['prevUser']; $cpu = $row['cpu']; $memory = $row['memory']; $hardDrive = $row['hardDrive']; $serverArray = array($id, $company, $location, $purchaseDate, $purchaseOrder, $value, $type, $notes, $manufacturer, $model, $serialNumber, $esc, $warranty, $user, $prevUser, $cpu, $memory, $hardDrive); } return $serverArray; } # print server table function PrintServerTable($serverArray){ $id = $serverArray[0]; $company = $serverArray[1]; $location = $serverArray[2]; $purchaseDate = $serverArray[3]; $purchaseOrder = $serverArray[4]; $value = $serverArray[5]; $type = $serverArray[6]; $notes = $serverArray[7]; $manufacturer = $serverArray[8]; $model = $serverArray[9]; $serialNumber = $serverArray[10]; $esc = $serverArray[11]; $warranty = $serverArray[12]; $user = $serverArray[13]; $prevUser = $serverArray[14]; $cpu = $serverArray[15]; $memory = $serverArray[16]; $hardDrive = $serverArray[17]; echo "<table width=\"100%\" border=\"0\"><tr><td style=\"vertical-align:top\"><table width=\"100%\" border=\"0\"><tr><td colspan=\"2\"><h2>General Info</h2></td></tr><tr id=\"hightlight\"><td>Asset ID:</td><td>"; echo $id; echo "</td></tr><tr><td>Company:</td><td>"; echo $company; echo "</td></tr><tr id=\"hightlight\"><td>Location:</td><td>"; echo $location; echo "</td></tr><tr><td>Purchase Date:</td><td>"; echo $purchaseDate; echo "</td></tr><tr id=\"hightlight\"><td>Purchase Order #:</td><td>"; echo $purchaseOrder; echo "</td></tr><tr><td>Value:</td><td>"; echo $value; echo "</td></tr><tr id=\"hightlight\"><td>Type:</td><td>"; echo $type; echo "</td></tr><tr><td>Notes:</td><td>"; echo $notes; echo "</td></tr></table></td><td style=\"vertical-align:top\"><table width=\"100%\" border=\"0\"><tr><td colspan=\"2\"><h2>Server Info</h2></td></tr><tr id=\"hightlight\"><td>Manufacturer:</td><td>"; echo $manufacturer; echo "</td></tr><tr><td>Model:</td><td>"; echo $model; echo "</td></tr><tr id=\"hightlight\"><td>Serial Number:</td><td>"; echo $serialNumber; echo "</td></tr><tr><td>ESC:</td><td>"; echo $esc; echo "</td></tr><tr id=\"hightlight\"><td>Warranty:</td><td>"; echo $warranty; echo "</td></tr><tr><td colspan=\"2\">&nbsp;</td></tr><tr><td colspan=\"2\"><h2>User Info</h2></td></tr><tr id=\"hightlight\"><td>User:</td><td>"; echo $user; echo "</td></tr><tr><td>Previous User:</td><td>"; echo $prevUser; echo "</td></tr></table></td><td style=\"vertical-align:top\"><table width=\"100%\" border=\"0\"><tr><td colspan=\"2\"><h2>Specs</h2></td></tr><tr id=\"hightlight\"><td>CPU:</td><td>"; echo $cpu; echo "</td></tr><tr><td>Memory:</td><td>"; echo $memory; echo "</td></tr><tr id=\"hightlight\"><td>Hard Drive:</td><td>"; echo $hardDrive; echo "</td></tr><tr><td colspan=\"2\">&nbsp;</td></tr><tr><td colspan=\"2\">&nbsp;</td></tr><tr><td colspan=\"2\"><h2>Options</h2></td></tr><tr><td colspan=\"2\"><a href=\"#\">Edit Asset</a></td></tr><tr><td colspan=\"2\"><a href=\"#\">Delete Asset</a></td></tr></table></td></tr></table>"; } ?> __ /* * View Asset * */ # include functions script include "functions.php"; $id = $_GET["id"]; if (empty($id)):$id="000"; endif; ConnectDB(); $type = GetAssetType($id); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="style.css" /> <title>Wagman IT Asset</title> </head> <body> <div id="page"> <div id="header"> <img src="images/logo.png" /> </div> </div> <div id="content"> <div id="container"> <div id="main"> <div id="menu"> <ul> <table width="100%" border="0"> <tr> <td width="15%"></td> <td width="30%%"><li><a href="index.php">Search Assets</a></li></td> <td width="30%"><li><a href="addAsset.php">Add Asset</a></li></td> <td width="25%"></td> </tr> </table> </ul> </div> <div id="text"> <ul> <li> <h1>View Asset</h1> </li> </ul> <?php if (empty($type)):echo "<ul><li><h2>Asset ID does not match any database entries.</h2></li></ul>"; else: switch ($type){ case "Server": $result = QueryServer($id); $ServerArray = GetServerData($result); PrintServerTable($ServerArray); break; case "Desktop"; break; case "Laptop"; break; } endif; ?> </div> </div> </div> <div class="clear"></div> <div id="footer" align="center"> <p>&nbsp;</p> </div> </div> <div id="tagline"> Wagman Construction - Bridging Generations since 1902 </div> </body> </html>

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• "domain crashed" when creating new Xen instance

  - by user47650

  I have downloaded a Xen virtual machine image from the appscale project, and I am trying to start it up. However once I run the command; xm create -c -f xen.conf The instance immediately crashes and provides no console output. however it produces logs that I have posted below. but this is the error; [2011-03-01 12:34:03 xend.XendDomainInfo 3580] WARNING (XendDomainInfo:1178) Domain has crashed: name=appscale-1.4b id=10. I have managed to mount the root.img file locally and verify that it is actually an ext3 file system. I am running Xen 3.0.3 that is a stock RPM from the CentOS 5 repos; # rpm -qa | grep -i xen xen-libs-3.0.3-105.el5_5.5 xen-3.0.3-105.el5_5.5 xen-libs-3.0.3-105.el5_5.5 kernel-xen-2.6.18-194.32.1.el5 any suggestions on how to proceed with troubleshooting? (i am a newbie to Xen) so far I have enabled console logging, but the log file is empty. ==> domain-builder-ng.log <== xc_dom_allocate: cmdline=" ip=:1.2.3.4::::eth0:dhcp root=/dev/sda1 ro xencons=tty console=tty1 console=hvc0 debugger=y debug=y sync_console", features="" xc_dom_kernel_file: filename="/boot/vmlinuz-2.6.27-7-server" xc_dom_malloc_filemap : 2284 kB xc_dom_ramdisk_file: filename="/boot/initrd.img-2.6.27-7-server" xc_dom_malloc_filemap : 9005 kB xc_dom_boot_xen_init: ver 3.1, caps xen-3.0-x86_64 xen-3.0-x86_32p xc_dom_parse_image: called xc_dom_find_loader: trying ELF-generic loader ... failed xc_dom_find_loader: trying Linux bzImage loader ... xc_dom_malloc : 9875 kB xc_dom_do_gunzip: unzip ok, 0x234bb2 -> 0x9a4de0 OK elf_parse_binary: phdr: paddr=0x200000 memsz=0x447000 elf_parse_binary: phdr: paddr=0x647000 memsz=0xab888 elf_parse_binary: phdr: paddr=0x6f3000 memsz=0x908 elf_parse_binary: phdr: paddr=0x6f4000 memsz=0x1c2f9c elf_parse_binary: memory: 0x200000 -> 0x8b6f9c elf_xen_parse_note: GUEST_OS = "linux" elf_xen_parse_note: GUEST_VERSION = "2.6" elf_xen_parse_note: XEN_VERSION = "xen-3.0" elf_xen_parse_note: VIRT_BASE = 0xffffffff80000000 elf_xen_parse_note: ENTRY = 0xffffffff8071e200 elf_xen_parse_note: HYPERCALL_PAGE = 0xffffffff80209000 elf_xen_parse_note: FEATURES = "!writable_page_tables|pae_pgdir_above_4gb" elf_xen_parse_note: PAE_MODE = "yes" elf_xen_parse_note: LOADER = "generic" elf_xen_parse_note: unknown xen elf note (0xd) elf_xen_parse_note: SUSPEND_CANCEL = 0x1 elf_xen_parse_note: HV_START_LOW = 0xffff800000000000 elf_xen_parse_note: PADDR_OFFSET = 0x0 elf_xen_addr_calc_check: addresses: virt_base = 0xffffffff80000000 elf_paddr_offset = 0x0 virt_offset = 0xffffffff80000000 virt_kstart = 0xffffffff80200000 virt_kend = 0xffffffff808b6f9c virt_entry = 0xffffffff8071e200 xc_dom_parse_elf_kernel: xen-3.0-x86_64: 0xffffffff80200000 -> 0xffffffff808b6f9c xc_dom_mem_init: mem 1024 MB, pages 0x40000 pages, 4k each xc_dom_mem_init: 0x40000 pages xc_dom_boot_mem_init: called x86_compat: guest xen-3.0-x86_64, address size 64 xc_dom_malloc : 2048 kB ==> xend.log <== [2011-03-01 12:34:01 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:01 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:01 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:01 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:01 xend.XendDomainInfo 3580] INFO (XendDomainInfo:957) Dev 0 still active, looping... [2011-03-01 12:34:01 xend.XendDomainInfo 3580] INFO (XendDomainInfo:957) Dev 0 still active, looping... [2011-03-01 12:34:01 xend.XendDomainInfo 3580] INFO (XendDomainInfo:957) Dev 0 still active, looping... [2011-03-01 12:34:02 xend.XendDomainInfo 3580] INFO (XendDomainInfo:957) Dev 0 still active, looping... [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:2114) UUID Created: True [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:2115) Devices to release: [], domid = 9 [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:2127) Releasing PVFB backend devices ... [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:207) XendDomainInfo.create(['domain', ['domid', 9], ['uuid', 'd5f22dd4-8dc2-f51f-84e9-eea7d71ea1d0'], ['vcpus', 1], ['vcpu_avail', 1], ['cpu_cap', 0], ['cpu_weight', 256], ['memory', 1024], ['shadow_memory', 0], ['maxmem', 1024], ['features', ''], ['name', 'appscale-1.4b'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], ['on_crash', 'restart'], ['image', ['linux', ['kernel', '/boot/vmlinuz-2.6.27-7-server'], ['ramdisk', '/boot/initrd.img-2.6.27-7-server'], ['ip', ':1.2.3.4::::eth0:dhcp'], ['root', '/dev/sda1 ro'], ['args', 'xencons=tty console=tty1 console=hvc0 debugger=y debug=y sync_console']]], ['cpus', []], ['device', ['vif', ['backend', 0], ['script', 'vif-bridge'], ['mac', '00:16:3B:72:10:E4']]], ['device', ['vbd', ['backend', 0], ['dev', 'sda1:disk'], ['uname', 'file:/local/xen/domains/appscale1.4/root.img'], ['mode', 'w']]], ['state', '----c-'], ['shutdown_reason', 'crash'], ['cpu_time', 0.000339131], ['online_vcpus', 1], ['up_time', '0.952092885971'], ['start_time', '1299011639.92'], ['store_mfn', 1169289], ['console_mfn', 1169288]]) [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:329) parseConfig: config is ['domain', ['domid', 9], ['uuid', 'd5f22dd4-8dc2-f51f-84e9-eea7d71ea1d0'], ['vcpus', 1], ['vcpu_avail', 1], ['cpu_cap', 0], ['cpu_weight', 256], ['memory', 1024], ['shadow_memory', 0], ['maxmem', 1024], ['features', ''], ['name', 'appscale-1.4b'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], ['on_crash', 'restart'], ['image', ['linux', ['kernel', '/boot/vmlinuz-2.6.27-7-server'], ['ramdisk', '/boot/initrd.img-2.6.27-7-server'], ['ip', ':1.2.3.4::::eth0:dhcp'], ['root', '/dev/sda1 ro'], ['args', 'xencons=tty console=tty1 console=hvc0 debugger=y debug=y sync_console']]], ['cpus', []], ['device', ['vif', ['backend', 0], ['script', 'vif-bridge'], ['mac', '00:16:3B:72:10:E4']]], ['device', ['vbd', ['backend', 0], ['dev', 'sda1:disk'], ['uname', 'file:/local/xen/domains/appscale1.4/root.img'], ['mode', 'w']]], ['state', '----c-'], ['shutdown_reason', 'crash'], ['cpu_time', 0.000339131], ['online_vcpus', 1], ['up_time', '0.952092885971'], ['start_time', '1299011639.92'], ['store_mfn', 1169289], ['console_mfn', 1169288]] [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:446) parseConfig: result is {'features': '', 'image': ['linux', ['kernel', '/boot/vmlinuz-2.6.27-7-server'], ['ramdisk', '/boot/initrd.img-2.6.27-7-server'], ['ip', ':1.2.3.4::::eth0:dhcp'], ['root', '/dev/sda1 ro'], ['args', 'xencons=tty console=tty1 console=hvc0 debugger=y debug=y sync_console']], 'cpus': [], 'vcpu_avail': 1, 'backend': [], 'uuid': 'd5f22dd4-8dc2-f51f-84e9-eea7d71ea1d0', 'on_reboot': 'restart', 'cpu_weight': 256.0, 'memory': 1024, 'cpu_cap': 0, 'localtime': None, 'timer_mode': None, 'start_time': 1299011639.9200001, 'on_poweroff': 'destroy', 'on_crash': 'restart', 'device': [('vif', ['vif', ['backend', 0], ['script', 'vif-bridge'], ['mac', '00:16:3B:72:10:E4']]), ('vbd', ['vbd', ['backend', 0], ['dev', 'sda1:disk'], ['uname', 'file:/local/xen/domains/appscale1.4/root.img'], ['mode', 'w']])], 'bootloader': None, 'maxmem': 1024, 'shadow_memory': 0, 'name': 'appscale-1.4b', 'bootloader_args': None, 'vcpus': 1, 'cpu': None} [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:1784) XendDomainInfo.construct: None [2011-03-01 12:34:02 xend 3580] DEBUG (balloon:145) Balloon: 3034420 KiB free; need 4096; done. [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:1953) XendDomainInfo.initDomain: 10 256.0 [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:1994) _initDomain:shadow_memory=0x0, maxmem=0x400, memory=0x400. [2011-03-01 12:34:02 xend 3580] DEBUG (balloon:145) Balloon: 3034412 KiB free; need 1048576; done. [2011-03-01 12:34:02 xend 3580] INFO (image:139) buildDomain os=linux dom=10 vcpus=1 [2011-03-01 12:34:02 xend 3580] DEBUG (image:208) domid = 10 [2011-03-01 12:34:02 xend 3580] DEBUG (image:209) memsize = 1024 [2011-03-01 12:34:02 xend 3580] DEBUG (image:210) image = /boot/vmlinuz-2.6.27-7-server [2011-03-01 12:34:02 xend 3580] DEBUG (image:211) store_evtchn = 1 [2011-03-01 12:34:02 xend 3580] DEBUG (image:212) console_evtchn = 2 [2011-03-01 12:34:02 xend 3580] DEBUG (image:213) cmdline = ip=:1.2.3.4::::eth0:dhcp root=/dev/sda1 ro xencons=tty console=tty1 console=hvc0 debugger=y debug=y sync_console [2011-03-01 12:34:02 xend 3580] DEBUG (image:214) ramdisk = /boot/initrd.img-2.6.27-7-server [2011-03-01 12:34:02 xend 3580] DEBUG (image:215) vcpus = 1 [2011-03-01 12:34:02 xend 3580] DEBUG (image:216) features = ==> domain-builder-ng.log <== xc_dom_build_image: called xc_dom_alloc_segment: kernel : 0xffffffff80200000 -> 0xffffffff808b7000 (pfn 0x200 + 0x6b7 pages) xc_dom_pfn_to_ptr: domU mapping: pfn 0x200+0x6b7 at 0x2aaaab5f6000 elf_load_binary: phdr 0 at 0x0x2aaaab5f6000 -> 0x0x2aaaaba3d000 elf_load_binary: phdr 1 at 0x0x2aaaaba3d000 -> 0x0x2aaaabae8888 elf_load_binary: phdr 2 at 0x0x2aaaabae9000 -> 0x0x2aaaabae9908 elf_load_binary: phdr 3 at 0x0x2aaaabaea000 -> 0x0x2aaaabb9a004 xc_dom_alloc_segment: ramdisk : 0xffffffff808b7000 -> 0xffffffff82382000 (pfn 0x8b7 + 0x1acb pages) xc_dom_malloc : 160 kB xc_dom_pfn_to_ptr: domU mapping: pfn 0x8b7+0x1acb at 0x2aaab0000000 xc_dom_do_gunzip: unzip ok, 0x8cb5e7 -> 0x1aca210 xc_dom_alloc_segment: phys2mach : 0xffffffff82382000 -> 0xffffffff82582000 (pfn 0x2382 + 0x200 pages) xc_dom_pfn_to_ptr: domU mapping: pfn 0x2382+0x200 at 0x2aaab1acb000 xc_dom_alloc_page : start info : 0xffffffff82582000 (pfn 0x2582) xc_dom_alloc_page : xenstore : 0xffffffff82583000 (pfn 0x2583) xc_dom_alloc_page : console : 0xffffffff82584000 (pfn 0x2584) nr_page_tables: 0x0000ffffffffffff/48: 0xffff000000000000 -> 0xffffffffffffffff, 1 table(s) nr_page_tables: 0x0000007fffffffff/39: 0xffffff8000000000 -> 0xffffffffffffffff, 1 table(s) nr_page_tables: 0x000000003fffffff/30: 0xffffffff80000000 -> 0xffffffffbfffffff, 1 table(s) nr_page_tables: 0x00000000001fffff/21: 0xffffffff80000000 -> 0xffffffff827fffff, 20 table(s) xc_dom_alloc_segment: page tables : 0xffffffff82585000 -> 0xffffffff8259c000 (pfn 0x2585 + 0x17 pages) xc_dom_pfn_to_ptr: domU mapping: pfn 0x2585+0x17 at 0x2aaab1ccb000 xc_dom_alloc_page : boot stack : 0xffffffff8259c000 (pfn 0x259c) xc_dom_build_image : virt_alloc_end : 0xffffffff8259d000 xc_dom_build_image : virt_pgtab_end : 0xffffffff82800000 xc_dom_boot_image: called arch_setup_bootearly: doing nothing xc_dom_compat_check: supported guest type: xen-3.0-x86_64 <= matches xc_dom_compat_check: supported guest type: xen-3.0-x86_32p xc_dom_update_guest_p2m: dst 64bit, pages 0x40000 clear_page: pfn 0x2584, mfn 0x11d788 clear_page: pfn 0x2583, mfn 0x11d789 xc_dom_pfn_to_ptr: domU mapping: pfn 0x2582+0x1 at 0x2aaab1ce2000 start_info_x86_64: called setup_hypercall_page: vaddr=0xffffffff80209000 pfn=0x209 domain builder memory footprint allocated malloc : 12139 kB anon mmap : 0 bytes mapped file mmap : 11289 kB domU mmap : 35 MB arch_setup_bootlate: shared_info: pfn 0x0, mfn 0xd6fe1 shared_info_x86_64: called vcpu_x86_64: called vcpu_x86_64: cr3: pfn 0x2585 mfn 0x11d787 launch_vm: called, ctxt=0x97b21f8 xc_dom_release: called ==> xend.log <== [2011-03-01 12:34:02 xend 3580] DEBUG (DevController:114) DevController: writing {'mac': '00:16:3B:72:10:E4', 'handle': '0', 'protocol': 'x86_64-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/vif/10/0'} to /local/domain/10/device/vif/0. [2011-03-01 12:34:02 xend 3580] DEBUG (DevController:116) DevController: writing {'domain': 'appscale-1.4b', 'handle': '0', 'script': '/etc/xen/scripts/vif-bridge', 'state': '1', 'frontend': '/local/domain/10/device/vif/0', 'mac': '00:16:3B:72:10:E4', 'online': '1', 'frontend-id': '10'} to /local/domain/0/backend/vif/10/0. [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:634) Checking for duplicate for uname: /local/xen/domains/appscale1.4/root.img [file:/local/xen/domains/appscale1.4/root.img], dev: sda1:disk, mode: w [2011-03-01 12:34:02 xend 3580] DEBUG (blkif:27) exception looking up device number for sda1:disk: [Errno 2] No such file or directory: '/dev/sda1:disk' [2011-03-01 12:34:02 xend 3580] DEBUG (blkif:27) exception looking up device number for sda1: [Errno 2] No such file or directory: '/dev/sda1' [2011-03-01 12:34:02 xend 3580] DEBUG (DevController:114) DevController: writing {'virtual-device': '2049', 'device-type': 'disk', 'protocol': 'x86_64-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/vbd/10/2049'} to /local/domain/10/device/vbd/2049. [2011-03-01 12:34:02 xend 3580] DEBUG (DevController:116) DevController: writing {'domain': 'appscale-1.4b', 'frontend': '/local/domain/10/device/vbd/2049', 'format': 'raw', 'dev': 'sda1', 'state': '1', 'params': '/local/xen/domains/appscale1.4/root.img', 'mode': 'w', 'online': '1', 'frontend-id': '10', 'type': 'file'} to /local/domain/0/backend/vbd/10/2049. [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:993) Storing VM details: {'shadow_memory': '0', 'uuid': 'd5f22dd4-8dc2-f51f-84e9-eea7d71ea1d0', 'on_reboot': 'restart', 'start_time': '1299011642.74', 'on_poweroff': 'destroy', 'name': 'appscale-1.4b', 'xend/restart_count': '0', 'vcpus': '1', 'vcpu_avail': '1', 'memory': '1024', 'on_crash': 'restart', 'image': "(linux (kernel /boot/vmlinuz-2.6.27-7-server) (ramdisk /boot/initrd.img-2.6.27-7-server) (ip :1.2.3.4::::eth0:dhcp) (root '/dev/sda1 ro') (args 'xencons=tty console=tty1 console=hvc0 debugger=y debug=y sync_console'))", 'maxmem': '1024'} [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:1028) Storing domain details: {'console/ring-ref': '1169288', 'console/port': '2', 'name': 'appscale-1.4b', 'console/limit': '1048576', 'vm': '/vm/d5f22dd4-8dc2-f51f-84e9-eea7d71ea1d0', 'domid': '10', 'cpu/0/availability': 'online', 'memory/target': '1048576', 'store/ring-ref': '1169289', 'store/port': '1'} [2011-03-01 12:34:02 xend 3580] DEBUG (DevController:158) Waiting for devices vif. [2011-03-01 12:34:02 xend 3580] DEBUG (DevController:164) Waiting for 0. [2011-03-01 12:34:02 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:1250) XendDomainInfo.handleShutdownWatch [2011-03-01 12:34:02 xend 3580] DEBUG (DevController:509) hotplugStatusCallback /local/domain/0/backend/vif/10/0/hotplug-status. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:509) hotplugStatusCallback /local/domain/0/backend/vif/10/0/hotplug-status. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:523) hotplugStatusCallback 1. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices usb. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices vbd. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:164) Waiting for 2049. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:509) hotplugStatusCallback /local/domain/0/backend/vbd/10/2049/hotplug-status. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:509) hotplugStatusCallback /local/domain/0/backend/vbd/10/2049/hotplug-status. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:523) hotplugStatusCallback 1. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices irq. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices vkbd. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices vfb. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices pci. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices ioports. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices tap. [2011-03-01 12:34:03 xend 3580] DEBUG (DevController:158) Waiting for devices vtpm. [2011-03-01 12:34:03 xend.XendDomainInfo 3580] WARNING (XendDomainInfo:1178) Domain has crashed: name=appscale-1.4b id=10. [2011-03-01 12:34:03 xend.XendDomainInfo 3580] ERROR (XendDomainInfo:2654) VM appscale-1.4b restarting too fast (2.275545 seconds since the last restart). Refusing to restart to avoid loops. [2011-03-01 12:34:03 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:2189) XendDomainInfo.destroy: domid=10 ==> xen-hotplug.log <== Nothing to flush. ==> xend.log <== [2011-03-01 12:34:03 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:03 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:03 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:03 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:03 xend.XendDomainInfo 3580] INFO (XendDomainInfo:2330) Dev 2049 still active, looping... [2011-03-01 12:34:03 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:2114) UUID Created: True [2011-03-01 12:34:03 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:2115) Devices to release: [], domid = 10 [2011-03-01 12:34:03 xend.XendDomainInfo 3580] DEBUG (XendDomainInfo:2127) Releasing PVFB backend devices ... And this is the xen.conf file that I am using; # cat xen.conf # Configuration file for the Xen instance AppScale, created # bn VMBuilder kernel = '/boot/vmlinuz-2.6.27-7-server' ramdisk = '/boot/initrd.img-2.6.27-7-server' memory = 1024 vcpus = 1 root = '/dev/sda1 ro' disk = [ 'file:/local/xen/domains/appscale1.4/root.img,sda1,w', ] name = 'appscale-1.4b' dhcp = 'dhcp' vif = [ 'mac=00:16:3B:72:10:E4' ] on_poweroff = 'destroy' on_reboot = 'restart' on_crash = 'restart' extra = 'xencons=tty console=tty1 console=hvc0 debugger=y debug=y sync_console'

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• Coherence - How to develop a custom push replication publisher

  - by cosmin.tudor(at)oracle.com

  CoherencePushReplicationDB.zipIn the example bellow I'm describing a way of developing a custom push replication publisher that publishes data to a database via JDBC. This example can be easily changed to publish data to other receivers (JMS,...) by performing changes to step 2 and small changes to step 3, steps that are presented bellow. I've used Eclipse as the development tool. To develop a custom push replication publishers we will need to go through 6 steps: Step 1: Create a custom publisher scheme class Step 2: Create a custom publisher class that should define what the publisher is doing. Step 3: Create a class data is performing the actions (publish to JMS, DB, etc ) for the custom publisher. Step 4: Register the new publisher against a ContentHandler. Step 5: Add the new custom publisher in the cache configuration file. Step 6: Add the custom publisher scheme class to the POF configuration file. All these steps are detailed bellow. The coherence project is attached and conclusions are presented at the end. Step 1: In the Coherence Eclipse project create a class called CustomPublisherScheme that should implement com.oracle.coherence.patterns.pushreplication.publishers.AbstractPublisherScheme. In this class define the elements of the custom-publisher-scheme element. For instance for a CustomPublisherScheme that looks like that: <sync:publisher> <sync:publisher-name>Active2-JDBC-Publisher</sync:publisher-name> <sync:publisher-scheme> <sync:custom-publisher-scheme> <sync:jdbc-string>jdbc:oracle:thin:@machine-name:1521:XE</sync:jdbc-string> <sync:username>hr</sync:username> <sync:password>hr</sync:password> </sync:custom-publisher-scheme> </sync:publisher-scheme> </sync:publisher> the code is: package com.oracle.coherence; import java.io.DataInput; import java.io.DataOutput; import java.io.IOException; import com.oracle.coherence.patterns.pushreplication.Publisher; import com.oracle.coherence.configuration.Configurable; import com.oracle.coherence.configuration.Mandatory; import com.oracle.coherence.configuration.Property; import com.oracle.coherence.configuration.parameters.ParameterScope; import com.oracle.coherence.environment.Environment; import com.tangosol.io.pof.PofReader; import com.tangosol.io.pof.PofWriter; import com.tangosol.util.ExternalizableHelper; @Configurable public class CustomPublisherScheme extends com.oracle.coherence.patterns.pushreplication.publishers.AbstractPublisherScheme { /** * */ private static final long serialVersionUID = 1L; private String jdbcString; private String username; private String password; public String getJdbcString() { return this.jdbcString; } @Property("jdbc-string") @Mandatory public void setJdbcString(String jdbcString) { this.jdbcString = jdbcString; } public String getUsername() { return username; } @Property("username") @Mandatory public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } @Property("password") @Mandatory public void setPassword(String password) { this.password = password; } public Publisher realize(Environment environment, ClassLoader classLoader, ParameterScope parameterScope) { return new CustomPublisher(getJdbcString(), getUsername(), getPassword()); } public void readExternal(DataInput in) throws IOException { super.readExternal(in); this.jdbcString = ExternalizableHelper.readSafeUTF(in); this.username = ExternalizableHelper.readSafeUTF(in); this.password = ExternalizableHelper.readSafeUTF(in); } public void writeExternal(DataOutput out) throws IOException { super.writeExternal(out); ExternalizableHelper.writeSafeUTF(out, this.jdbcString); ExternalizableHelper.writeSafeUTF(out, this.username); ExternalizableHelper.writeSafeUTF(out, this.password); } public void readExternal(PofReader reader) throws IOException { super.readExternal(reader); this.jdbcString = reader.readString(100); this.username = reader.readString(101); this.password = reader.readString(102); } public void writeExternal(PofWriter writer) throws IOException { super.writeExternal(writer); writer.writeString(100, this.jdbcString); writer.writeString(101, this.username); writer.writeString(102, this.password); } } Step 2: Define what the CustomPublisher should basically do by creating a new java class called CustomPublisher that implements com.oracle.coherence.patterns.pushreplication.Publisher package com.oracle.coherence; import com.oracle.coherence.patterns.pushreplication.EntryOperation; import com.oracle.coherence.patterns.pushreplication.Publisher; import com.oracle.coherence.patterns.pushreplication.exceptions.PublisherNotReadyException; import java.io.BufferedWriter; import java.util.Iterator; public class CustomPublisher implements Publisher { private String jdbcString; private String username; private String password; private transient BufferedWriter bufferedWriter; public CustomPublisher() { } public CustomPublisher(String jdbcString, String username, String password) { this.jdbcString = jdbcString; this.username = username; this.password = password; this.bufferedWriter = null; } public String getJdbcString() { return this.jdbcString; } public String getUsername() { return username; } public String getPassword() { return password; } public void publishBatch(String cacheName, String publisherName, Iterator<EntryOperation> entryOperations) { DatabasePersistence databasePersistence = new DatabasePersistence( jdbcString, username, password); while (entryOperations.hasNext()) { EntryOperation entryOperation = (EntryOperation) entryOperations .next(); databasePersistence.databasePersist(entryOperation); } } public void start(String cacheName, String publisherName) throws PublisherNotReadyException { System.err .printf("Started: Custom JDBC Publisher for Cache %s with Publisher %s\n", new Object[] { cacheName, publisherName }); } public void stop(String cacheName, String publisherName) { System.err .printf("Stopped: Custom JDBC Publisher for Cache %s with Publisher %s\n", new Object[] { cacheName, publisherName }); } } In the publishBatch method from above we inform the publisher that he is supposed to persist data to a database: DatabasePersistence databasePersistence = new DatabasePersistence( jdbcString, username, password); while (entryOperations.hasNext()) { EntryOperation entryOperation = (EntryOperation) entryOperations .next(); databasePersistence.databasePersist(entryOperation); } Step 3: The class that deals with the persistence is a very basic one that uses JDBC to perform inserts/updates against a database. package com.oracle.coherence; import com.oracle.coherence.patterns.pushreplication.EntryOperation; import java.sql.*; import java.text.SimpleDateFormat; import com.oracle.coherence.Order; public class DatabasePersistence { public static String INSERT_OPERATION = "INSERT"; public static String UPDATE_OPERATION = "UPDATE"; public Connection dbConnection; public DatabasePersistence(String jdbcString, String username, String password) { this.dbConnection = createConnection(jdbcString, username, password); } public Connection createConnection(String jdbcString, String username, String password) { Connection connection = null; System.err.println("Connecting to: " + jdbcString + " Username: " + username + " Password: " + password); try { // Load the JDBC driver String driverName = "oracle.jdbc.driver.OracleDriver"; Class.forName(driverName); // Create a connection to the database connection = DriverManager.getConnection(jdbcString, username, password); System.err.println("Connected to:" + jdbcString + " Username: " + username + " Password: " + password); } catch (ClassNotFoundException e) { e.printStackTrace(); } // driver catch (SQLException e) { e.printStackTrace(); } return connection; } public void databasePersist(EntryOperation entryOperation) { if (entryOperation.getOperation().toString() .equalsIgnoreCase(INSERT_OPERATION)) { insert(((Order) entryOperation.getPublishableEntry().getValue())); } else if (entryOperation.getOperation().toString() .equalsIgnoreCase(UPDATE_OPERATION)) { update(((Order) entryOperation.getPublishableEntry().getValue())); } } public void update(Order order) { String update = "UPDATE Orders set QUANTITY= '" + order.getQuantity() + "', AMOUNT='" + order.getAmount() + "', ORD_DATE= '" + (new SimpleDateFormat("dd-MMM-yyyy")).format(order .getOrdDate()) + "' WHERE SYMBOL='" + order.getSymbol() + "'"; System.err.println("UPDATE = " + update); try { Statement stmt = getDbConnection().createStatement(); stmt.execute(update); stmt.close(); } catch (SQLException ex) { System.err.println("SQLException: " + ex.getMessage()); } } public void insert(Order order) { String insert = "insert into Orders values('" + order.getSymbol() + "'," + order.getQuantity() + "," + order.getAmount() + ",'" + (new SimpleDateFormat("dd-MMM-yyyy")).format(order .getOrdDate()) + "')"; System.err.println("INSERT = " + insert); try { Statement stmt = getDbConnection().createStatement(); stmt.execute(insert); stmt.close(); } catch (SQLException ex) { System.err.println("SQLException: " + ex.getMessage()); } } public Connection getDbConnection() { return dbConnection; } public void setDbConnection(Connection dbConnection) { this.dbConnection = dbConnection; } } Step 4: Now we need to register our publisher against a ContentHandler. In order to achieve that we need to create in our eclipse project a new class called CustomPushReplicationNamespaceContentHandler that should extend the com.oracle.coherence.patterns.pushreplication.configuration.PushReplicationNamespaceContentHandler. In the constructor of the new class we define a new handler for our custom publisher. package com.oracle.coherence; import com.oracle.coherence.configuration.Configurator; import com.oracle.coherence.environment.extensible.ConfigurationContext; import com.oracle.coherence.environment.extensible.ConfigurationException; import com.oracle.coherence.environment.extensible.ElementContentHandler; import com.oracle.coherence.patterns.pushreplication.PublisherScheme; import com.oracle.coherence.environment.extensible.QualifiedName; import com.oracle.coherence.patterns.pushreplication.configuration.PushReplicationNamespaceContentHandler; import com.tangosol.run.xml.XmlElement; public class CustomPushReplicationNamespaceContentHandler extends PushReplicationNamespaceContentHandler { public CustomPushReplicationNamespaceContentHandler() { super(); registerContentHandler("custom-publisher-scheme", new ElementContentHandler() { public Object onElement(ConfigurationContext context, QualifiedName qualifiedName, XmlElement xmlElement) throws ConfigurationException { PublisherScheme publisherScheme = new CustomPublisherScheme(); Configurator.configure(publisherScheme, context, qualifiedName, xmlElement); return publisherScheme; } }); } } Step 5: Now we should define our CustomPublisher in the cache configuration file according to the following documentation. <cache-config xmlns:sync="class:com.oracle.coherence.CustomPushReplicationNamespaceContentHandler" xmlns:cr="class:com.oracle.coherence.environment.extensible.namespaces.InstanceNamespaceContentHandler"> <caching-schemes> <sync:provider pof-enabled="false"> <sync:coherence-provider /> </sync:provider> <caching-scheme-mapping> <cache-mapping> <cache-name>publishing-cache</cache-name> <scheme-name>distributed-scheme-with-publishing-cachestore</scheme-name> <autostart>true</autostart> <sync:publisher> <sync:publisher-name>Active2 Publisher</sync:publisher-name> <sync:publisher-scheme> <sync:remote-cluster-publisher-scheme> <sync:remote-invocation-service-name>remote-site1</sync:remote-invocation-service-name> <sync:remote-publisher-scheme> <sync:local-cache-publisher-scheme> <sync:target-cache-name>publishing-cache</sync:target-cache-name> </sync:local-cache-publisher-scheme> </sync:remote-publisher-scheme> <sync:autostart>true</sync:autostart> </sync:remote-cluster-publisher-scheme> </sync:publisher-scheme> </sync:publisher> <sync:publisher> <sync:publisher-name>Active2-Output-Publisher</sync:publisher-name> <sync:publisher-scheme> <sync:stderr-publisher-scheme> <sync:autostart>true</sync:autostart> <sync:publish-original-value>true</sync:publish-original-value> </sync:stderr-publisher-scheme> </sync:publisher-scheme> </sync:publisher> <sync:publisher> <sync:publisher-name>Active2-JDBC-Publisher</sync:publisher-name> <sync:publisher-scheme> <sync:custom-publisher-scheme> <sync:jdbc-string>jdbc:oracle:thin:@machine_name:1521:XE</sync:jdbc-string> <sync:username>hr</sync:username> <sync:password>hr</sync:password> </sync:custom-publisher-scheme> </sync:publisher-scheme> </sync:publisher> </cache-mapping> </caching-scheme-mapping> <!-- The following scheme is required for each remote-site when using a RemoteInvocationPublisher --> <remote-invocation-scheme> <service-name>remote-site1</service-name> <initiator-config> <tcp-initiator> <remote-addresses> <socket-address> <address>localhost</address> <port>20001</port> </socket-address> </remote-addresses> <connect-timeout>2s</connect-timeout> </tcp-initiator> <outgoing-message-handler> <request-timeout>5s</request-timeout> </outgoing-message-handler> </initiator-config> </remote-invocation-scheme> <!-- END: com.oracle.coherence.patterns.pushreplication --> <proxy-scheme> <service-name>ExtendTcpProxyService</service-name> <acceptor-config> <tcp-acceptor> <local-address> <address>localhost</address> <port>20002</port> </local-address> </tcp-acceptor> </acceptor-config> <autostart>true</autostart> </proxy-scheme> </caching-schemes> </cache-config> As you can see in the red-marked text from above I've:       - set new Namespace Content Handler       - define the new custom publisher that should work together with other publishers like: stderr and remote publishers in our case. Step 6: Add the com.oracle.coherence.CustomPublisherScheme to your custom-pof-config file: <pof-config> <user-type-list> <!-- Built in types --> <include>coherence-pof-config.xml</include> <include>coherence-common-pof-config.xml</include> <include>coherence-messagingpattern-pof-config.xml</include> <include>coherence-pushreplicationpattern-pof-config.xml</include> <!-- Application types --> <user-type> <type-id>1901</type-id> <class-name>com.oracle.coherence.Order</class-name> <serializer> <class-name>com.oracle.coherence.OrderSerializer</class-name> </serializer> </user-type> <user-type> <type-id>1902</type-id> <class-name>com.oracle.coherence.CustomPublisherScheme</class-name> </user-type> </user-type-list> </pof-config> CONCLUSIONSThis approach allows for publishers to publish data to almost any other receiver (database, JMS, MQ, ...). The only thing that needs to be changed is the DatabasePersistence.java class that should be adapted to the chosen receiver. Only minor changes are needed for the rest of the code (to publishBatch method from CustomPublisher class).

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• Currency Conversion in Oracle BI applications

  - by Saurabh Verma

  Authored by Vijay Aggarwal and Hichem Sellami A typical data warehouse contains Star and/or Snowflake schema, made up of Dimensions and Facts. The facts store various numerical information including amounts. Example; Order Amount, Invoice Amount etc. With the true global nature of business now-a-days, the end-users want to view the reports in their own currency or in global/common currency as defined by their business. This presents a unique opportunity in BI to provide the amounts in converted rates either by pre-storing or by doing on-the-fly conversions while displaying the reports to the users. Source Systems OBIA caters to various source systems like EBS, PSFT, Sebl, JDE, Fusion etc. Each source has its own unique and intricate ways of defining and storing currency data, doing currency conversions and presenting to the OLTP users. For example; EBS stores conversion rates between currencies which can be classified by conversion rates, like Corporate rate, Spot rate, Period rate etc. Siebel stores exchange rates by conversion rates like Daily. EBS/Fusion stores the conversion rates for each day, where as PSFT/Siebel store for a range of days. PSFT has Rate Multiplication Factor and Rate Division Factor and we need to calculate the Rate based on them, where as other Source systems store the Currency Exchange Rate directly. OBIA Design The data consolidation from various disparate source systems, poses the challenge to conform various currencies, rate types, exchange rates etc., and designing the best way to present the amounts to the users without affecting the performance. When consolidating the data for reporting in OBIA, we have designed the mechanisms in the Common Dimension, to allow users to report based on their required currencies. OBIA Facts store amounts in various currencies: Document Currency: This is the currency of the actual transaction. For a multinational company, this can be in various currencies. Local Currency: This is the base currency in which the accounting entries are recorded by the business. This is generally defined in the Ledger of the company. Global Currencies: OBIA provides five Global Currencies. Three are used across all modules. The last two are for CRM only. A Global currency is very useful when creating reports where the data is viewed enterprise-wide. Example; a US based multinational would want to see the reports in USD. The company will choose USD as one of the global currencies. OBIA allows users to define up-to five global currencies during the initial implementation. The term Currency Preference is used to designate the set of values: Document Currency, Local Currency, Global Currency 1, Global Currency 2, Global Currency 3; which are shared among all modules. There are four more currency preferences, specific to certain modules: Global Currency 4 (aka CRM Currency) and Global Currency 5 which are used in CRM; and Project Currency and Contract Currency, used in Project Analytics. When choosing Local Currency for Currency preference, the data will show in the currency of the Ledger (or Business Unit) in the prompt. So it is important to select one Ledger or Business Unit when viewing data in Local Currency. More on this can be found in the section: Toggling Currency Preferences in the Dashboard. Design Logic When extracting the fact data, the OOTB mappings extract and load the document amount, and the local amount in target tables. It also loads the exchange rates required to convert the document amount into the corresponding global amounts. If the source system only provides the document amount in the transaction, the extract mapping does a lookup to get the Local currency code, and the Local exchange rate. The Load mapping then uses the local currency code and rate to derive the local amount. The load mapping also fetches the Global Currencies and looks up the corresponding exchange rates. The lookup of exchange rates is done via the Exchange Rate Dimension provided as a Common/Conforming Dimension in OBIA. The Exchange Rate Dimension stores the exchange rates between various currencies for a date range and Rate Type. Two physical tables W_EXCH_RATE_G and W_GLOBAL_EXCH_RATE_G are used to provide the lookups and conversions between currencies. The data is loaded from the source system’s Ledger tables. W_EXCH_RATE_G stores the exchange rates between currencies with a date range. On the other hand, W_GLOBAL_EXCH_RATE_G stores the currency conversions between the document currency and the pre-defined five Global Currencies for each day. Based on the requirements, the fact mappings can decide and use one or both tables to do the conversion. Currency design in OBIA also taps into the MLS and Domain architecture, thus allowing the users to map the currencies to a universal Domain during the implementation time. This is especially important for companies deploying and using OBIA with multiple source adapters. Some Gotchas to Look for It is necessary to think through the currencies during the initial implementation. 1) Identify various types of currencies that are used by your business. Understand what will be your Local (or Base) and Documentation currency. Identify various global currencies that your users will want to look at the reports. This will be based on the global nature of your business. Changes to these currencies later in the project, while permitted, but may cause Full data loads and hence lost time. 2) If the user has a multi source system make sure that the Global Currencies and Global Rate Types chosen in Configuration Manager do have the corresponding source specific counterparts. In other words, make sure for every DW specific value chosen for Currency Code or Rate Type, there is a source Domain mapping already done. Technical Section This section will briefly mention the technical scenarios employed in the OBIA adaptors to extract data from each source system. In OBIA, we have two main tables which store the Currency Rate information as explained in previous sections. W_EXCH_RATE_G and W_GLOBAL_EXCH_RATE_G are the two tables. W_EXCH_RATE_G stores all the Currency Conversions present in the source system. It captures data for a Date Range. W_GLOBAL_EXCH_RATE_G has Global Currency Conversions stored at a Daily level. However the challenge here is to store all the 5 Global Currency Exchange Rates in a single record for each From Currency. Let’s voyage further into the Source System Extraction logic for each of these tables and understand the flow briefly. EBS: In EBS, we have Currency Data stored in GL_DAILY_RATES table. As the name indicates GL_DAILY_RATES EBS table has data at a daily level. However in our warehouse we store the data with a Date Range and insert a new range record only when the Exchange Rate changes for a particular From Currency, To Currency and Rate Type. Below are the main logical steps that we employ in this process. (Incremental Flow only) – Cleanup the data in W_EXCH_RATE_G. Delete the records which have Start Date > minimum conversion date Update the End Date of the existing records. Compress the daily data from GL_DAILY_RATES table into Range Records. Incremental map uses $$XRATE_UPD_NUM_DAY as an extra parameter. Generate Previous Rate, Previous Date and Next Date for each of the Daily record from the OLTP. Filter out the records which have Conversion Rate same as Previous Rates or if the Conversion Date lies within a single day range. Mark the records as ‘Keep’ and ‘Filter’ and also get the final End Date for the single Range record (Unique Combination of From Date, To Date, Rate and Conversion Date). Filter the records marked as ‘Filter’ in the INFA map. The above steps will load W_EXCH_RATE_GS. Step 0 updates/deletes W_EXCH_RATE_G directly. SIL map will then insert/update the GS data into W_EXCH_RATE_G. These steps convert the daily records in GL_DAILY_RATES to Range records in W_EXCH_RATE_G. We do not need such special logic for loading W_GLOBAL_EXCH_RATE_G. This is a table where we store data at a Daily Granular Level. However we need to pivot the data because the data present in multiple rows in source tables needs to be stored in different columns of the same row in DW. We use GROUP BY and CASE logic to achieve this. Fusion: Fusion has extraction logic very similar to EBS. The only difference is that the Cleanup logic that was mentioned in step 0 above does not use $$XRATE_UPD_NUM_DAY parameter. In Fusion we bring all the Exchange Rates in Incremental as well and do the cleanup. The SIL then takes care of Insert/Updates accordingly. PeopleSoft:PeopleSoft does not have From Date and To Date explicitly in the Source tables. Let’s look at an example. Please note that this is achieved from PS1 onwards only. 1 Jan 2010 – USD to INR – 45 31 Jan 2010 – USD to INR – 46 PSFT stores records in above fashion. This means that Exchange Rate of 45 for USD to INR is applicable for 1 Jan 2010 to 30 Jan 2010. We need to store data in this fashion in DW. Also PSFT has Exchange Rate stored as RATE_MULT and RATE_DIV. We need to do a RATE_MULT/RATE_DIV to get the correct Exchange Rate. We generate From Date and To Date while extracting data from source and this has certain assumptions: If a record gets updated/inserted in the source, it will be extracted in incremental. Also if this updated/inserted record is between other dates, then we also extract the preceding and succeeding records (based on dates) of this record. This is required because we need to generate a range record and we have 3 records whose ranges have changed. Taking the same example as above, if there is a new record which gets inserted on 15 Jan 2010; the new ranges are 1 Jan to 14 Jan, 15 Jan to 30 Jan and 31 Jan to Next available date. Even though 1 Jan record and 31 Jan have not changed, we will still extract them because the range is affected. Similar logic is used for Global Exchange Rate Extraction. We create the Range records and get it into a Temporary table. Then we join to Day Dimension, create individual records and pivot the data to get the 5 Global Exchange Rates for each From Currency, Date and Rate Type. Siebel: Siebel Facts are dependent on Global Exchange Rates heavily and almost none of them really use individual Exchange Rates. In other words, W_GLOBAL_EXCH_RATE_G is the main table used in Siebel from PS1 release onwards. As of January 2002, the Euro Triangulation method for converting between currencies belonging to EMU members is not needed for present and future currency exchanges. However, the method is still available in Siebel applications, as are the old currencies, so that historical data can be maintained accurately. The following description applies only to historical data needing conversion prior to the 2002 switch to the Euro for the EMU member countries. If a country is a member of the European Monetary Union (EMU), you should convert its currency to other currencies through the Euro. This is called triangulation, and it is used whenever either currency being converted has EMU Triangulation checked. Due to this, there are multiple extraction flows in SEBL ie. EUR to EMU, EUR to NonEMU, EUR to DMC and so on. We load W_EXCH_RATE_G through multiple flows with these data. This has been kept same as previous versions of OBIA. W_GLOBAL_EXCH_RATE_G being a new table does not have such needs. However SEBL does not have From Date and To Date columns in the Source tables similar to PSFT. We use similar extraction logic as explained in PSFT section for SEBL as well. What if all 5 Global Currencies configured are same? As mentioned in previous sections, from PS1 onwards we store Global Exchange Rates in W_GLOBAL_EXCH_RATE_G table. The extraction logic for this table involves Pivoting data from multiple rows into a single row with 5 Global Exchange Rates in 5 columns. As mentioned in previous sections, we use CASE and GROUP BY functions to achieve this. This approach poses a unique problem when all the 5 Global Currencies Chosen are same. For example – If the user configures all 5 Global Currencies as ‘USD’ then the extract logic will not be able to generate a record for From Currency=USD. This is because, not all Source Systems will have a USD->USD conversion record. We have _Generated mappings to take care of this case. We generate a record with Conversion Rate=1 for such cases. Reusable Lookups Before PS1, we had a Mapplet for Currency Conversions. In PS1, we only have reusable Lookups- LKP_W_EXCH_RATE_G and LKP_W_GLOBAL_EXCH_RATE_G. These lookups have another layer of logic so that all the lookup conditions are met when they are used in various Fact Mappings. Any user who would want to do a LKP on W_EXCH_RATE_G or W_GLOBAL_EXCH_RATE_G should and must use these Lookups. A direct join or Lookup on the tables might lead to wrong data being returned. Changing Currency preferences in the Dashboard: In the 796x series, all amount metrics in OBIA were showing the Global1 amount. The customer needed to change the metric definitions to show them in another Currency preference. Project Analytics started supporting currency preferences since 7.9.6 release though, and it published a Tech note for other module customers to add toggling between currency preferences to the solution. List of Currency Preferences Starting from 11.1.1.x release, the BI Platform added a new feature to support multiple currencies. The new session variable (PREFERRED_CURRENCY) is populated through a newly introduced currency prompt. This prompt can take its values from the xml file: userpref_currencies_OBIA.xml, which is hosted in the BI Server installation folder, under :< home>\instances\instance1\config\OracleBIPresentationServicesComponent\coreapplication_obips1\userpref_currencies.xml This file contains the list of currency preferences, like“Local Currency”, “Global Currency 1”,…which customers can also rename to give them more meaningful business names. There are two options for showing the list of currency preferences to the user in the dashboard: Static and Dynamic. In Static mode, all users will see the full list as in the user preference currencies file. In the Dynamic mode, the list shown in the currency prompt drop down is a result of a dynamic query specified in the same file. Customers can build some security into the rpd, so the list of currency preferences will be based on the user roles…BI Applications built a subject area: “Dynamic Currency Preference” to run this query, and give every user only the list of currency preferences required by his application roles. Adding Currency to an Amount Field When the user selects one of the items from the currency prompt, all the amounts in that page will show in the Currency corresponding to that preference. For example, if the user selects “Global Currency1” from the prompt, all data will be showing in Global Currency 1 as specified in the Configuration Manager. If the user select “Local Currency”, all amount fields will show in the Currency of the Business Unit selected in the BU filter of the same page. If there is no particular Business Unit selected in that filter, and the data selected by the query contains amounts in more than one currency (for example one BU has USD as a functional currency, the other has EUR as functional currency), then subtotals will not be available (cannot add USD and EUR amounts in one field), and depending on the set up (see next paragraph), the user may receive an error. There are two ways to add the Currency field to an amount metric: In the form of currency code, like USD, EUR…For this the user needs to add the field “Apps Common Currency Code” to the report. This field is in every subject area, usually under the table “Currency Tag” or “Currency Code”… In the form of currency symbol ($ for USD, € for EUR,…) For this, the user needs to format the amount metrics in the report as a currency column, by specifying the currency tag column in the Column Properties option in Column Actions drop down list. Typically this column should be the “BI Common Currency Code” available in every subject area. Select Column Properties option in the Edit list of a metric. In the Data Format tab, select Custom as Treat Number As. Enter the following syntax under Custom Number Format: [$:currencyTagColumn=Subjectarea.table.column] Where Column is the “BI Common Currency Code” defined to take the currency code value based on the currency preference chosen by the user in the Currency preference prompt.

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• A ToDynamic() Extension Method For Fluent Reflection

  - by Dixin

  Recently I needed to demonstrate some code with reflection, but I felt it inconvenient and tedious. To simplify the reflection coding, I created a ToDynamic() extension method. The source code can be downloaded from here. Problem One example for complex reflection is in LINQ to SQL. The DataContext class has a property Privider, and this Provider has an Execute() method, which executes the query expression and returns the result. Assume this Execute() needs to be invoked to query SQL Server database, then the following code will be expected: using (NorthwindDataContext database = new NorthwindDataContext()) { // Constructs the query. IQueryable<Product> query = database.Products.Where(product => product.ProductID > 0) .OrderBy(product => product.ProductName) .Take(2); // Executes the query. Here reflection is required, // because Provider, Execute(), and ReturnValue are not public members. IEnumerable<Product> results = database.Provider.Execute(query.Expression).ReturnValue; // Processes the results. foreach (Product product in results) { Console.WriteLine("{0}, {1}", product.ProductID, product.ProductName); } } Of course, this code cannot compile. And, no one wants to write code like this. Again, this is just an example of complex reflection. using (NorthwindDataContext database = new NorthwindDataContext()) { // Constructs the query. IQueryable<Product> query = database.Products.Where(product => product.ProductID > 0) .OrderBy(product => product.ProductName) .Take(2); // database.Provider PropertyInfo providerProperty = database.GetType().GetProperty( "Provider", BindingFlags.NonPublic | BindingFlags.GetProperty | BindingFlags.Instance); object provider = providerProperty.GetValue(database, null); // database.Provider.Execute(query.Expression) // Here GetMethod() cannot be directly used, // because Execute() is a explicitly implemented interface method. Assembly assembly = Assembly.Load("System.Data.Linq"); Type providerType = assembly.GetTypes().SingleOrDefault( type => type.FullName == "System.Data.Linq.Provider.IProvider"); InterfaceMapping mapping = provider.GetType().GetInterfaceMap(providerType); MethodInfo executeMethod = mapping.InterfaceMethods.Single(method => method.Name == "Execute"); IExecuteResult executeResult = executeMethod.Invoke(provider, new object[] { query.Expression }) as IExecuteResult; // database.Provider.Execute(query.Expression).ReturnValue IEnumerable<Product> results = executeResult.ReturnValue as IEnumerable<Product>; // Processes the results. foreach (Product product in results) { Console.WriteLine("{0}, {1}", product.ProductID, product.ProductName); } } This may be not straight forward enough. So here a solution will implement fluent reflection with a ToDynamic() extension method: IEnumerable<Product> results = database.ToDynamic() // Starts fluent reflection. .Provider.Execute(query.Expression).ReturnValue; C# 4.0 dynamic In this kind of scenarios, it is easy to have dynamic in mind, which enables developer to write whatever code after a dot: using (NorthwindDataContext database = new NorthwindDataContext()) { // Constructs the query. IQueryable<Product> query = database.Products.Where(product => product.ProductID > 0) .OrderBy(product => product.ProductName) .Take(2); // database.Provider dynamic dynamicDatabase = database; dynamic results = dynamicDatabase.Provider.Execute(query).ReturnValue; } This throws a RuntimeBinderException at runtime: 'System.Data.Linq.DataContext.Provider' is inaccessible due to its protection level. Here dynamic is able find the specified member. So the next thing is just writing some custom code to access the found member. .NET 4.0 DynamicObject, and DynamicWrapper<T> Where to put the custom code for dynamic? The answer is DynamicObject’s derived class. I first heard of DynamicObject from Anders Hejlsberg's video in PDC2008. It is very powerful, providing useful virtual methods to be overridden, like: TryGetMember() TrySetMember() TryInvokeMember() etc.  (In 2008 they are called GetMember, SetMember, etc., with different signature.) For example, if dynamicDatabase is a DynamicObject, then the following code: dynamicDatabase.Provider will invoke dynamicDatabase.TryGetMember() to do the actual work, where custom code can be put into. Now create a type to inherit DynamicObject: public class DynamicWrapper<T> : DynamicObject { private readonly bool _isValueType; private readonly Type _type; private T _value; // Not readonly, for value type scenarios. public DynamicWrapper(ref T value) // Uses ref in case of value type. { if (value == null) { throw new ArgumentNullException("value"); } this._value = value; this._type = value.GetType(); this._isValueType = this._type.IsValueType; } public override bool TryGetMember(GetMemberBinder binder, out object result) { // Searches in current type's public and non-public properties. PropertyInfo property = this._type.GetTypeProperty(binder.Name); if (property != null) { result = property.GetValue(this._value, null).ToDynamic(); return true; } // Searches in explicitly implemented properties for interface. MethodInfo method = this._type.GetInterfaceMethod(string.Concat("get_", binder.Name), null); if (method != null) { result = method.Invoke(this._value, null).ToDynamic(); return true; } // Searches in current type's public and non-public fields. FieldInfo field = this._type.GetTypeField(binder.Name); if (field != null) { result = field.GetValue(this._value).ToDynamic(); return true; } // Searches in base type's public and non-public properties. property = this._type.GetBaseProperty(binder.Name); if (property != null) { result = property.GetValue(this._value, null).ToDynamic(); return true; } // Searches in base type's public and non-public fields. field = this._type.GetBaseField(binder.Name); if (field != null) { result = field.GetValue(this._value).ToDynamic(); return true; } // The specified member is not found. result = null; return false; } // Other overridden methods are not listed. } In the above code, GetTypeProperty(), GetInterfaceMethod(), GetTypeField(), GetBaseProperty(), and GetBaseField() are extension methods for Type class. For example: internal static class TypeExtensions { internal static FieldInfo GetBaseField(this Type type, string name) { Type @base = type.BaseType; if (@base == null) { return null; } return @base.GetTypeField(name) ?? @base.GetBaseField(name); } internal static PropertyInfo GetBaseProperty(this Type type, string name) { Type @base = type.BaseType; if (@base == null) { return null; } return @base.GetTypeProperty(name) ?? @base.GetBaseProperty(name); } internal static MethodInfo GetInterfaceMethod(this Type type, string name, params object[] args) { return type.GetInterfaces().Select(type.GetInterfaceMap).SelectMany(mapping => mapping.TargetMethods) .FirstOrDefault( method => method.Name.Split('.').Last().Equals(name, StringComparison.Ordinal) && method.GetParameters().Count() == args.Length && method.GetParameters().Select( (parameter, index) => parameter.ParameterType.IsAssignableFrom(args[index].GetType())).Aggregate( true, (a, b) => a && b)); } internal static FieldInfo GetTypeField(this Type type, string name) { return type.GetFields( BindingFlags.GetField | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic).FirstOrDefault( field => field.Name.Equals(name, StringComparison.Ordinal)); } internal static PropertyInfo GetTypeProperty(this Type type, string name) { return type.GetProperties( BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic).FirstOrDefault( property => property.Name.Equals(name, StringComparison.Ordinal)); } // Other extension methods are not listed. } So now, when invoked, TryGetMember() searches the specified member and invoke it. The code can be written like this: dynamic dynamicDatabase = new DynamicWrapper<NorthwindDataContext>(ref database); dynamic dynamicReturnValue = dynamicDatabase.Provider.Execute(query.Expression).ReturnValue; This greatly simplified reflection. ToDynamic() and fluent reflection To make it even more straight forward, A ToDynamic() method is provided: public static class DynamicWrapperExtensions { public static dynamic ToDynamic<T>(this T value) { return new DynamicWrapper<T>(ref value); } } and a ToStatic() method is provided to unwrap the value: public class DynamicWrapper<T> : DynamicObject { public T ToStatic() { return this._value; } } In the above TryGetMember() method, please notice it does not output the member’s value, but output a wrapped member value (that is, memberValue.ToDynamic()). This is very important to make the reflection fluent. Now the code becomes: IEnumerable<Product> results = database.ToDynamic() // Here starts fluent reflection. .Provider.Execute(query.Expression).ReturnValue .ToStatic(); // Unwraps to get the static value. With the help of TryConvert(): public class DynamicWrapper<T> : DynamicObject { public override bool TryConvert(ConvertBinder binder, out object result) { result = this._value; return true; } } ToStatic() can be omitted: IEnumerable<Product> results = database.ToDynamic() .Provider.Execute(query.Expression).ReturnValue; // Automatically converts to expected static value. Take a look at the reflection code at the beginning of this post again. Now it is much much simplified! Special scenarios In 90% of the scenarios ToDynamic() is enough. But there are some special scenarios. Access static members Using extension method ToDynamic() for accessing static members does not make sense. Instead, DynamicWrapper<T> has a parameterless constructor to handle these scenarios: public class DynamicWrapper<T> : DynamicObject { public DynamicWrapper() // For static. { this._type = typeof(T); this._isValueType = this._type.IsValueType; } } The reflection code should be like this: dynamic wrapper = new DynamicWrapper<StaticClass>(); int value = wrapper._value; int result = wrapper.PrivateMethod(); So accessing static member is also simple, and fluent of course. Change instances of value types Value type is much more complex. The main problem is, value type is copied when passing to a method as a parameter. This is why ref keyword is used for the constructor. That is, if a value type instance is passed to DynamicWrapper<T>, the instance itself will be stored in this._value of DynamicWrapper<T>. Without the ref keyword, when this._value is changed, the value type instance itself does not change. Consider FieldInfo.SetValue(). In the value type scenarios, invoking FieldInfo.SetValue(this._value, value) does not change this._value, because it changes the copy of this._value. I searched the Web and found a solution for setting the value of field: internal static class FieldInfoExtensions { internal static void SetValue<T>(this FieldInfo field, ref T obj, object value) { if (typeof(T).IsValueType) { field.SetValueDirect(__makeref(obj), value); // For value type. } else { field.SetValue(obj, value); // For reference type. } } } Here __makeref is a undocumented keyword of C#. But method invocation has problem. This is the source code of TryInvokeMember(): public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result) { if (binder == null) { throw new ArgumentNullException("binder"); } MethodInfo method = this._type.GetTypeMethod(binder.Name, args) ?? this._type.GetInterfaceMethod(binder.Name, args) ?? this._type.GetBaseMethod(binder.Name, args); if (method != null) { // Oops! // If the returnValue is a struct, it is copied to heap. object resultValue = method.Invoke(this._value, args); // And result is a wrapper of that copied struct. result = new DynamicWrapper<object>(ref resultValue); return true; } result = null; return false; } If the returned value is of value type, it will definitely copied, because MethodInfo.Invoke() does return object. If changing the value of the result, the copied struct is changed instead of the original struct. And so is the property and index accessing. They are both actually method invocation. For less confusion, setting property and index are not allowed on struct. Conclusions The DynamicWrapper<T> provides a simplified solution for reflection programming. It works for normal classes (reference types), accessing both instance and static members. In most of the scenarios, just remember to invoke ToDynamic() method, and access whatever you want: StaticType result = someValue.ToDynamic()._field.Method().Property[index]; In some special scenarios which requires changing the value of a struct (value type), this DynamicWrapper<T> does not work perfectly. Only changing struct’s field value is supported. The source code can be downloaded from here, including a few unit test code.

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• Hudson plugin problem

  - by user27644

  Hi. I've created almost the same plugin as JobTypeColumn. There is only one difference - it shows job description instead of job type. But after i can't add this column to my list view. I have an NullPointerException after i edited my config.xml manually. java.lang.NullPointerException at hudson.model.Descriptor.newInstancesFromHeteroList(Descriptor.java:626) at hudson.util.DescribableList.rebuildHetero(DescribableList.java:164) at hudson.model.ListView.submit(ListView.java:262) at hudson.model.View.doConfigSubmit(View.java:484) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:185) at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:101) at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:54) at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:74) at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:492) at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:180) at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:492) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:408) at org.kohsuke.stapler.Stapler.service(Stapler.java:117) at javax.servlet.http.HttpServlet.service(HttpServlet.java:45) at winstone.ServletConfiguration.execute(ServletConfiguration.java:249) at winstone.RequestDispatcher.forward(RequestDispatcher.java:335) at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:378) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94) at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:304) at org.jvnet.hudson.plugins.monitoring.HudsonMonitoringFilter.doFilter(HudsonMonitoringFilter.java:31) at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:97) at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86) at winstone.FilterConfiguration.execute(FilterConfiguration.java:195) at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368) at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47) at winstone.FilterConfiguration.execute(FilterConfiguration.java:195) at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368) at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84) at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76) at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164) at winstone.FilterConfiguration.execute(FilterConfiguration.java:195) at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368) at winstone.RequestDispatcher.forward(RequestDispatcher.java:333) at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:244) at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150) at java.lang.Thread.run(Unknown Source)

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• MultiPath configuration on RHEL5 and Clariion CX-300

  - by Kamil Z

  I have problem with discovering my FC-connected CX-300 storage. Frankly speaking I'm complete novice in FibreChannel, so step by step explanation would be appreciated. My configuration consist of two IBM HS20 blades with RHEL5.4 on board and 2x Qlogic ISP2422-based 4Gb Fibre Channel HBAs on each blade. As a FC switch there are two Brocades built in BladeCenter Chassis, and finally there is EMC Clariion CX-300. CX300, and Brocade switches should be configured properly, because they were working fine with previous configuration, which main defference was RHEL3 instead RHEL5.4 Below there is my output from several usefull commands: #lspci | grep Fibre 06:01.0 FibreChannle: Qlogic Corp. ISP2422-based 4Gb Fibre Channel to PCI-X HBA (rev 02) 06:01.1 FibreChannle: Qlogic Corp. ISP2422-based 4Gb Fibre Channel to PCI-X HBA (rev 02) #lsmod | grep qla qla2xxx 1084741 0 scsi_transport_fc 37577 1 qla2xxx scsi_mod 141717 10 scsi_dh,qla2xxx,sg,scsi_transport_fc,usb_storage,libata,mptspi,mptscsih,scsi_transport_spi,sd_mod #cat /proc/scsi/scsi Attached Devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: LSILOGIC Model: 1030 IM IM Rev: 1000 Type: Direct-Access ANSI SCSI revision: 02 Host: scsi0 Channel: 01 Id: 00 Lun: 00 Vendor: IBM-ESXS Model: ST936701LC FN Rev: B418 Type: Direct-Access ANSI SCSI revision: 04 Host: scsi0 Channel: 01 Id: 00 Lun: 00 Vendor: IBM-ESXS Model: ST936701LC FN Rev: B418 Type: Direct-Access ANSI SCSI revision: 04 I'd followed instructions from this site (editing /etc/multipath.conf), but i failed after multipath -ll - the output was empty. Do you have any suggestions about discovering FC Connected LUNs in such configuration?

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• laptop motherboard "shorts" when connected to adapter

  - by Bash

  Disclaimer: I'm sort of a noob, and this is a long post. Thank you all in advance! summary: completely dead laptop with no signs of life whatsoever (suddenly, for no apparent reason) Here's the deal: Lenovo Y470 (only a few months old with no water or shock damage). It stopped working suddenly (no lights, no sound, even when connecting adapter with or without battery). I tried a different adapter (same electrical rating), but no luck. I disassembled the thing completely, and tried plugging in the adapter and looking for signs of life with all different combinations of components installed (tried all combinations of RAM, CPU, USB power cords, screen, etc plugged in). no luck. Then, I noticed (as I was plugging in the adapter to try for the millionth time) that there was a "spark" for an instant when I first connect the adapter to the power jack. The adapter's LED would then flash (indicating it isn't working or charging). So, I thought the power jack has a short of some sort (due to bad soldering or something). Scanned virtually every single component on the motherboard, and tested the power jack connections with a multimeter. No shorts or damage to anything on the entire motherboard. Now I'm thinking I need to replace the motherboard. But, my actual question: What does this "shorting" when connecting the adapter signify? (btw, the voltage across the power connections and current through it drop to virtually zero when the adapter is connected and "sparks", and they stay that way). The bewildering thing is that there are no damaged components, and the voltage across adapter terminals returns to normal after I disconnect it (so it's not damaged). Please take a look at the pictures (of the motherboard's power connection and nearby components) and see if I'm missing something completely obvious... Links to pictures and laptop and motherboard model: pictures on DropBox Motherboard model: LA-6881P Laptop model: Lenovo IdeaPad Y470

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• Do you need to advertise an AFP service via Avahi for an Ubuntu Server to show up in OSX Finder?

  - by James

  I am only advertising an NFS share plus the "model", and I don't want to install extra services on the Server unless I have to, ie netatalk, as it is used solely for NFS exports. Currently there is no entry in Finder under "Shared" with below config of Avahi. serveradmin@FILESERVER:/etc/avahi/services$ cat nfs.service <?xml version="1.0" standalone='no'?><!--*-nxml-*--> <!DOCTYPE service-group SYSTEM "avahi-service.dtd"> <service-group> <name replace-wildcards="yes">%h</name> <service> <type>_nfs._tcp</type> <port>2049</port> <txt-record>path=/Volumes/StoragePool</txt-record> </service> <service> <type>_device-info._tcp</type> <port>0</port> <txt-record>model=Xserve</txt-record> </service> </service-group> Server: Ubuntu 12.04.01 x64 Clients: OSX 10.6.8 , 10.7.5, 10.8.2 The goal is to advertise that NFS share, then assign a really old Model code of Mac like a Powermac and switch out the icon for a more "LinuxServer-y" one. Plus allow users to connect to NFS in a manner they are familiar with like our other Xserve servers. I think Avahi is working in general as if I do: nfs://FILESERVER.local/Volumes/StoragePool it will connect fine. Any ideas?

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• Wireless card on HP laptop not working

  - by D. Strout

  I just bought an HP Envy m6-1125dx online from Best Buy. When I got it home and started it up, the wireless card did not work well - at all. I could connect, but any real usage would cause the connection to start dropping every 30 seconds or so, and it would be really slow. Taking another look at the reviews on the Best Buy site, it seems only a few others had this problem, so I took it to my local Best Buy and exchanged it for another unit. Got it home again and the card had the same issues. Which leads to my dilemma. First: does this model have several different cards that it could come with? Mine is a Ralink RT5390R (on both units I received). If it does, then I can keep exchanging until I get a unit with a different card. I wouldn't ask this, except it seems weird that only a few people mentioned this issue, so I thought that might be one possibility. I looked in to replacing the card with a different one myself, but it seems that HP blocks certain wireless cards. However, some people reported success in replacing the card, and this site said it was only an issue on "older HP computer[s]". Can anyone confirm this? Finally, if that fails/will not work, does anyone know what I can get through Best Buy? I am concerned that they will not put any different card than the Ralink, and after two of those, I don't want that. Can I ask Best Buy support to use a different card? Can they even get another card from HP? I guess the base question is: should I attempt to replace the card myself (two days via Amazon to get a new card), should I try to get the laptop repaired through Best Buy (two - four weeks), should I go for a different model laptop from Best Buy, or should I try a different unit of the same model (three's the charm?).

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