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• improve my code for collapsing a list of data.frames

  - by romunov

  Dear StackOverFlowers (flowers in short), I have a list of data.frames (walk.sample) that I would like to collapse into a single (giant) data.frame. While collapsing, I would like to mark (adding another column) which rows have came from which element of the list. This is what I've got so far. This is the data.frame that needs to be collapsed/stacked. > walk.sample [[1]] walker x y 1073 3 228.8756 -726.9198 1086 3 226.7393 -722.5561 1081 3 219.8005 -728.3990 1089 3 225.2239 -727.7422 1032 3 233.1753 -731.5526 [[2]] walker x y 1008 3 205.9104 -775.7488 1022 3 208.3638 -723.8616 1072 3 233.8807 -718.0974 1064 3 217.0028 -689.7917 1026 3 234.1824 -723.7423 [[3]] [1] 3 [[4]] walker x y 546 2 629.9041 831.0852 524 2 627.8698 873.3774 578 2 572.3312 838.7587 513 2 633.0598 871.7559 538 2 636.3088 836.6325 1079 3 206.3683 -729.6257 1095 3 239.9884 -748.2637 1005 3 197.2960 -780.4704 1045 3 245.1900 -694.3566 1026 3 234.1824 -723.7423 I have written a function to add a column that denote from which element the rows came followed by appending it to an existing data.frame. collapseToDataFrame <- function(x) { # collapse list to a dataframe with a twist walk.df <- data.frame() for (i in 1:length(x)) { n.rows <- nrow(x[[i]]) if (length(x[[i]])>1) { temp.df <- cbind(x[[i]], rep(i, n.rows)) names(temp.df) <- c("walker", "x", "y", "session") walk.df <- rbind(walk.df, temp.df) } else { cat("Empty list", "\n") } } return(walk.df) } > collapseToDataFrame(walk.sample) Empty list Empty list walker x y session 3 1 -604.5055 -123.18759 1 60 1 -562.0078 -61.24912 1 84 1 -594.4661 -57.20730 1 9 1 -604.2893 -110.09168 1 43 1 -632.2491 -54.52548 1 1028 3 240.3905 -724.67284 1 1040 3 232.5545 -681.61225 1 1073 3 228.8756 -726.91980 1 1091 3 209.0373 -740.96173 1 1036 3 248.7123 -694.47380 1 I'm curious whether this can be done more elegantly, with perhaps do.call() or some other more generic function?

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• Can the public ssh key from my local machine be used to access two different users on a remote serve

  - by Nick

  I have an new ubuntu (hardy 8.04) server, it has two users, User1 and User2. User1 is listed in sudoers. I appended my public ssh key (my local machine's public key local/Users/nick/.ssh/id_rsa.pub) to authorized_keys in remote_server/home/user1/.ssh/authorized_keys, changed the permissions on user1/.ssh/ to 700 and user1/.ssh/authorized_keys to 600 and both file and folder are owned my User1. Then added I User1 to sshd_config (AllowUsers User1). This works and I can login into User1 debug1: Offering public key: /Users/nick/.ssh/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: Authentication succeeded (publickey). debug1: channel 0: new [client-session] debug1: Entering interactive session. Last login: Mon Mar 15 09:51:01 2010 from ..*.* I then copied the authorized_keys file remote_server/home/user1/.ssh/authorized_keys to remote_server/home/user2/.shh/authorized_keys and changed the permissions and ownership and added User2 to AllowUsers in sshd_config (AllowUsers User1 User2). Now when I try to login to User2 it will not authenticate the same public key. debug1: Offering public key: /Users/nick/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: Trying private key: /Users/nick/.ssh/identity debug1: Trying private key: /Users/nick/.ssh/id_dsa debug1: No more authentication methods to try. Permission denied (publickey). Am I missing something fundamental about the way ssh works? Thanks in advance, Nick

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• Lazy-loading with Spring HibernateDaoSupport ?

  - by umanga

  Greetings I am developing a non-webapplication using Spring+Hibernate. My question is how the HibernateDaoSupport handles lazy-loading , because after a call do DAO , the Session is closed. Take a look at following psuedo-code: DAO is like: CommonDao extends HibernateDaoSupport{ Family getFamilyById(String id); SubFamily getSubFamily(String familyid,String subfamilyid); } Domain model is like: Family{ private List<SubFamily> subfamiles; public List<SubFamily> getSubFamiles(); } SubFamily{ private Family family; public Family getFamily(); } In the application I get DAO from app-context and want to following operations.Is this possible to do with lazy-loading because AFAIK after every method (getFamilyById() , getSubFamily() ) the session is closed. CommonDAO dao=//get bean from application context; Family famA=dao.getFamilyById(familyid); // //Do some stuff List<SubFamily> childrenA=fam.getSubFamiles(); SubFamily asubfamily=dao.getSubFamily(id,subfamilyid); // //Do some other stuff Family famB=asubfamily.getFamily();

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• C# wrapper and Callbacks

  - by fergs

  I'm in the process of writing a C# wrapper for Dallmeier Common API light (Camera & Surviellance systems) and I've never written a wrapper before, but I have used the Canon EDSDK C# wrapper. So I'm using the Canon wrapper as a guide to writing the Dallmeier wrapper. I'm currently having issues with wrapping a callback. In the API manual it has the following: dlm_connect int(unsigned long uLWindowHandle, const char * strIP, const char* strUser1, const char* strPwd1, const char* strUser2, const char* strPwd2, void (*callback)(void *pParameters, void *pResult, void *pInput), void * pInput) Arguments - ulWindowhandle - handle of the window that is passed to the ViewerSDK to display video and messages there - strUser1/2 - names of the users to log in. If only single user login is used strUser2 is - NULL - strPwd1/2 - passwords of both users. If strUser2 is NULL strPwd2 is ignored. Return This function creates a SessionHandle that has to be passed Callback pParameters will be structured: - unsigned long ulFunctionID - unsigned long ulSocketHandle, //handle to socket of the established connection - unsigned long ulWindowHandle, - int SessionHandle, //session handle of the session created - const char * strIP, - const char* strUser1, - const char* strPwd1, - const char* strUser2, - const char * strPWD2 pResult is a pointer to an integer, representing the result of the operation. Zero on success. Negative values are error codes. So from what I've read on the Net and Stack Overflow - C# uses delegates for the purpose of callbacks. So I create a my Callback function : public delegate uint DallmeierCallback(DallPparameters pParameters, IntPtr pResult, IntPtr pInput); I create the connection function [DllImport("davidapidis.dll")] public extern static int dlm_connect(ulong ulWindowHandle, string strIP, string strUser1, string strPwd1, string strUser2, string strPwd2, DallmeierCallback inDallmeierFunc And (I think) the DallPParameters as a struct : [StructLayout(LayoutKind.Sequential)] public struct DallPParameters { public ulong ulfunctionID; public ulong ulsocketHandle; public ulong ulWindowHandle; ... } All of this is in my wrapper class. Am I heading in the right direction or is this completely wrong?

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• ActiveMq NMS Disconnects after about 30 seconds

  - by Kelly

  'm trying to do simple pub/sub with ActiveMq. I can get it all working fine, but the subscriber disconnects after about 30 seconds. I've looked for a timeout type of value I can change but nothing seems to be working. Here is the subscriber: using System; using Apache.NMS; using Apache.NMS.ActiveMQ; using Apache.NMS.ActiveMQ.Commands; namespace ActiveMQCatcher { internal class Program { private static void Main(string[] args) { IConnectionFactory factory = new ConnectionFactory("tcp://localhost:61616/"); using (IConnection connection = factory.CreateConnection()) { connection.ClientId = "MYID"; connection.Start(); using (ISession session = connection.CreateSession()) { IMessageConsumer consumer = session.CreateConsumer(new ActiveMQTopic("MYTOPIC"), null, false); consumer.Listener += consumer_Listener; Console.ReadLine(); } connection.Stop(); } } private static void consumer_Listener(IMessage message) { Console.WriteLine("Got: " + ((ITextMessage) message).Text); } } } I tried this: connection.RequestTimeout = TimeSpan.MaxValue; But it didn't seem to change anything. To get the problem just run the program and sit waiting for about 30 seconds. You can see the connection disappear in the ActiveMQ Console (http://localhost:8161/admin/connections.jsp by default) Any ideas?

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• After Filter redirects to login.jsp, proper servlet doesnt get called

  - by gnomeguru

  My simple project structure is shown in this link. I am using Eclipse and Tomcat 6. There is login.jsp which submits its form to login_servlet. The login_servlet sets a session variable and then redirects to home.jsp. The home.jsp file has links to the 4 JSP files under a directory called /sam. In web.xml I have given the url-pattern as /sam/* for the LogFiler filter. The LogFilter just reads the session variable and does doChain(request,resposne) if valid, else it redirects to /login.jsp. RequestDispatcher rd = request.getRequestDispatcher("/login.jsp"); rd.forward(request,response); Basically I don't want anyone to access files inside /sam directory directly. Now let's say, I try to directly access a file inside /sam directory, the filter kicks in and the redirection to login.jsp works and even the broswers contents are that of login.jsp, but the url in the browser doesn't change. When I enter details and press submit, instead of sending the data to login_servlet, it sends it to sam/login_servlet and then tomcat tells me there is no such servlet here! Obviously there isn't. My doubt is why is it sending it so sam/login_servlet instead of /login_servlet which is usually what it does when I start running the login.jsp on my own. One more thing, is there a way I can apply the servlet to ONLY .jsp files inside /sam diectory? I tried giving the url-pattern like /sam/*.jsp, but Tomcat was refusing to accept that url-pattern.

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• Hibernate SetParameter driving me nuts.

  - by cbmeeks

  This works hql = "from State where StateCode like 'T%'"; Query query = session.createQuery(hql); This does not hql = "from State where StateCode like :StateCode"; Query query = session.createQuery(hql); query.setParameter("StateCode", "T%"); I get this 1568 [main] DEBUG org.hibernate.hql.ast.ErrorCounter - throwQueryException() : no errors 1596 [main] DEBUG org.hibernate.hql.antlr.HqlSqlBaseWalker - select << begin [level=1, statement=select] 1608 [main] DEBUG org.hibernate.hql.ast.tree.FromElement - FromClause{level=1} : com.kencogroup.kkms.models.State (no alias) -> state0_ 1610 [main] DEBUG org.hibernate.hql.ast.tree.FromReferenceNode - Resolved : {synthetic-alias} -> {synthetic-alias} 1611 [main] DEBUG org.hibernate.hql.ast.tree.DotNode - getDataType() : StateCode -> org.hibernate.type.StringType@a39137 1611 [main] DEBUG org.hibernate.hql.ast.tree.FromReferenceNode - Resolved : {synthetic-alias}.StateCode -> state0_.StateCode SELECT Exception: java.lang.reflect.UndeclaredThrowableException Notice the UndeclaredThrowableException exception. What am I doing wrong? The database is SQL Server 2008 if that helps. But like I said, other queries work just fine. Thanks

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• Problem connecting to Apache Derby using Hibernate configuration file in Netbeans (ERROR XSDB6)

  - by me_here

  I've created a local Apache Derby database in Netbeans, but am having problems when I try and autogenerate the POJO files, using the "Hibernate Reverse Engineering Wizard". My Hibernate configuration (generated by Netbeans from the database connection, then I added a few bits): <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- Default Netbeans generated parameters --> <property name="hibernate.connection.driver_class">org.apache.derby.jdbc.EmbeddedDriver</property> <property name="hibernate.connection.url">jdbc:derby:C:/CerealDatabase</property> <property name="hibernate.connection.username">cerealuser</property> <property name="hibernate.connection.password">cerealpass</property> <!-- Additional parameters --> <property name="hibernate.dialect">org.hibernate.dialect.DerbyDialect</property> <property name="hibernate.show_sql">true</property> <property name="hibernate.default_schema">CEREALUSER</property> </session-factory> </hibernate-configuration> When I try and generate the POJOs using this configuration file, I get the message to check my configuration file, and the derby.log gives the errors: java.sql.SQLException: Failed to start database 'C:/CerealDatabase', see the next exception for details. Caused by: java.sql.SQLException: Failed to start database 'C:/CerealDatabase', see the next exception for details. Caused by: ERROR XSDB6: Another instance of Derby may have already booted the database C:\CerealDatabase. I've closed any other connections to the database before trying this, and there is no "db.lck" lock file at the time, which indicates there are no connections to the database as I understand it. Does anyone have any ideas? Help gratefully received.

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• asp.net mvc cookies not being sent back

  - by brian b

  My application at mysubdomain.mydomain.com needs to set a cookie that contains some user session information. They log in at a https page. We authenticate them and set some session info in a cookie. We do this in a helper library that takes in the controller context contextBase.Response.Cookies[CookiePayload.CookieName].Value = encryptedTicket; contextBase.Response.Cookies[CookiePayload.CookieName].Expires = cookieExpires; contextBase.Response.Cookies[CookiePayload.CookieName].Domain= ConfigHelper.CookieDomain; contextBase.Response.Cookies[CookiePayload.CookieName].HttpOnly=true; We do a quick redirect in the controller (to a non https page): this.ControllerContext.HttpContext.Response.Redirect(redirectTo, false); return null; The cookie appears in the response (according to firebug's net tab). But neither fireforx nor ie send the cookie on subsequent gets. We are setting the cookie domain to mydomain.com even though the site is mysubdomain.mydomain.com. Skipping the redirect command has no effect, nor does changing the cookie value. I'm baffled. Thanks for any suggestions.

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• ASP:NET :Problem in DoNut Caching

  - by Shyju

  I have an ASP.NET page where i am trying to do some output caching.But ran into a problem. My ASPX page has <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="MYProject._Default" %> <%@ OutputCache Duration="600" VaryByParam="None" %> <%@ Register TagPrefix="MYProjectUC" TagName="PageHeader" Src="~/Lib/UserControls/PageHeader.ascx" %> <%@ Register TagPrefix="MYProjectUC" TagName="PageFooter" Src="~/Lib/UserControls/PageFooter.ascx" %> and i have used the User control called "PageHeader" in the aspx page. In PageHeader.ascx, i have an asp.net substitution control, where i want to show some links based on the logged in user. <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="PageHeader.ascx.cs" Inherits="MyProject.Lib.UserControls.PageHeader1" %> <div class="headerRow"> <div class="headerLogo"> <a href="Default.aspx"><img src="Lib/Images/header.gif" alt=""></a> </div> <div id="divHeaderMenu" runat="server"> <asp:Substitution ID="subLinks" runat="server" MethodName="GetUserProfileHeaderLinks" /> </div> </div><!--headerRow--> In my ascx.cs file,i have a static method which will return a string based on whether the used logged in or not using session public static string GetUserProfileHeaderLinks(HttpContext context) { string strHeaderLinks = string.Empty; // check session and return string return strHeaderLinks; } But Still the page shows the same content for both logged in user and Guest user. My objective is to to have the Page being cached except the content inside the substitution control. Any idea how to achieve this ? Thanks in advance

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• Can the same ssh key be used to access two different users on the same server?

  - by Nick

  I have an new ubuntu (hardy 8.04) server, it has two users, User1 and User2. User1 is listed in sudoers. I appended my public ssh key to authorized_keys in /home/user1/.ssh/authorized_keys, changed the permissions on user1/.ssh/ to 700 and user1/.ssh/authorized_keys to 600 and both file and folder are owned my User1. Then added I User1 to sshd_config (AllowUsers User1). This works and I can login into User1 debug1: Offering public key: /Users/nick/.ssh/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: Authentication succeeded (publickey). debug1: channel 0: new [client-session] debug1: Entering interactive session. Last login: Mon Mar 15 09:51:01 2010 from 86.141.61.197 I then copied the authorized_keys file to /home/user2/.shh/ and changed the permissions and ownership and added User2 to AllowUsers in sshd_config (AllowUsers User1 User2). Now when I try to login to User2 it will not authenticate the same public key. debug1: Offering public key: /Users/nick/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: Trying private key: /Users/nick/.ssh/identity debug1: Trying private key: /Users/nick/.ssh/id_dsa debug1: No more authentication methods to try. Permission denied (publickey). Am I missing something fundamental about the way ssh works? Thanks in advance, Nick

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• NHibernate returning duplicate object in child collections when using Fetch

  - by UpTheCreek

  When doing a query like this (using Nhibernate 2.1.2): ICriteria criteria = session.CreateCriteria<MyRootType>() .SetFetchMode("ChildCollection1", FetchMode.Eager) .SetFetchMode("ChildCollection2", FetchMode.Eager) .Add(Restrictions.IdEq(id)); I am getting multiple duplicate objects in some cartesian fashion. E.g. if ChildCollection1 has 3 elements, and ChildColection2 has 2 elements then I get results with each element in ChildColection1 one duplicated, and each element in ChildColection2 triplicated! This was a bit of a WTF moment for me... So how to do this correctly? Is using SetFetchMode like this only supported when specifying one collection? Am I just using it wrong (I've seen some references to results transformers, but imagined this would be simplier). Is this something that's different in NH3? Update: As per Felice's suggestion, I tried using the DistinctRootEntity transformer, but this is still returning duplicates. Code: ICriteria criteria = session.CreateCriteria<MyRootType>() .SetFetchMode("ChildCollection1", FetchMode.Eager) .SetFetchMode("ChildCollection2", FetchMode.Eager) .Add(Restrictions.IdEq(id)); criteria.SetResultTransformer(Transformers.DistinctRootEntity); return criteria.UniqueResult<MyRootType>();

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• IIS8 Asp.net State service remote connection failure

  - by maxisam

  Recently we upgrade our web server to windows server 2012 with IIS8. We have this issue when users try to connect the asp.net state service to this web server remotely. It always popup Unable to make the session state request to the session state server. Please ensure that the ASP.NET State service is started and that the client and server ports are the same. If the server is on a remote machine, please ensure that it accepts remote requests by checking the value of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aspnet_state\Parameters\AllowRemoteConnection. If the server is on the local machine, and if the before mentioned registry value does not exist or is set to 0, then the state server connection string must use either 'localhost' or '127.0.0.1' as the server name. In IIS7 / 7.5 we use the same way and it works fine. As long as the state service is running and firewall is set properly, we don't have any problem. However, in IIS8 it doesn't work. (We even turn off firewall to test it) Thanks for helping.

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• CakePHP 1.3 and Uploadifive/Uploadify - Change Upload Filename to a random string

  - by CaboONE

  I have somehow implemented UPLOADIFIVE in my CakePHP application. Everything seems to work great including uploading multiple files and inserting the correct information in the Database. Based on the following code, I would like to UPLOAD AND SAVE EVERY FILE WITH A RANDOM NAME TAKING INTO ACCOUNT THE CURRENT DATE OR SOMETHING SIMILAR. How could I accomplish this? In my Photos Controller I have the following function: // This function is called at every file upload. It uploads the file onto the server // and save the corresponding image name, etc, to the database table `photos`. function upload() { $uploadDir = '/img/uploads/photos/'; if (!empty($_FILES)) { debug($_FILES); $tempFile = $_FILES['Filedata']['tmp_name'][0]; $uploadDir = $_SERVER['DOCUMENT_ROOT'] . $uploadDir; $targetFile = $uploadDir . $_FILES['Filedata']['name'][0]; // Validate the file type $fileTypes = array('jpg', 'jpeg', 'gif', 'png'); // Allowed file extensions $fileParts = pathinfo($_FILES['Filedata']['name'][0]); // Validate the filetype if (in_array($fileParts['extension'], $fileTypes)) { // Save the file move_uploaded_file($tempFile,$targetFile); $_POST['image'] = $_FILES['Filedata']['name'][0]; $this->Photo->create(); if ($this->Photo->save($_POST)) { $this->Session->setFlash($targetFile, 'default', array('class' => 'alert_success')); $this->redirect(array('action' => 'index')); } } else { // The file type wasn't allowed //echo 'Invalid file type.'; $this->Session->setFlash(__('The photo could not be saved. Please, try again.', true)); } } } In my View file - admin_add.ctp I have added the following function $('#file_upload').uploadifive({ 'auto' : false, 'uploadScript' : '/photos/upload', 'buttonText' : 'BROWSE FILES', 'method' : 'post', 'onAddQueueItem' : function(file) { this.data('uploadifive').settings.formData = { 'photocategory_id' : $('#PhotoPhotocategoryId').val() }; } }); <input type="file" name="file_upload" id="file_upload" />

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• Unwanted Log4J output in a Tomcat app

  - by Bytecode Ninja

  I have the following log4j config setup for my Web app which is being deployed to Tomcat: # Set root logger level to DEBUG and its only appender to A1. log4j.rootLogger=INFO, A1 # A1 is set to be a ConsoleAppender. log4j.appender.A1=org.apache.log4j.ConsoleAppender # A1 uses PatternLayout. log4j.appender.A1.layout=org.apache.log4j.PatternLayout log4j.appender.A1.layout.ConversionPattern=%m%n log4j.logger.org.hibernate=WARN log4j.logger.org.apache=WARN And it is being picked up by the Log4J as modifying the ConversionPattern affects the logs printed to the console. However there are unwanted and unasked-for logging outputs interleaving my log outputs as it can be seen in the following example: Apr 18, 2010 4:14:55 PM com.acme.web.OpenSessionInViewFilter doFilter INFO: Closing session Apr 18, 2010 4:14:56 PM com.acme.web.OpenSessionInViewFilter doFilter INFO: Entering Apr 18, 2010 4:14:57 PM com.acme.web.OpenSessionInViewFilter doFilter INFO: Commiting transaction Apr 18, 2010 4:14:57 PM com.acme.web.OpenSessionInViewFilter doFilter INFO: Closing session Why are "Apr 18, 2010 4:14:57 PM com.acme.web.OpenSessionInViewFilter doFilter" and other similar log statements printed on the console? Also why are they not formatted according to my Log4J config? Thanks in advance.

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• Using EJB in Wicket WebPage

  - by Errandir

  When I'm using @EJB annotation to access stateless EJB through remote interface in common HttpServlet, it works OK: public class ListMsgs extends HttpServlet { @EJB private Msgs msgsRI; ... protected void processRequest(...) ... { List msgs = msgsRI.getAll(); ... } ... } But when I'm trying the same thing in Wicket WebPage, I'm getting null in return for bean: public class ListM extends WebPage { @EJB private Msgs msgsRI; ... public ListM() { List msgs = msgsRI.getAll(); // NullPointerException ... } ... } The several lines of this “Unexpected RuntimeException” are: WicketMessage: Can't instantiate page using constructor public testapp.web.ListM() Root cause: java.lang.NullPointerException at testapp.web.ListM.<init>(ListM.java:22) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.apache.wicket.session.DefaultPageFactory.createPage(DefaultPageFactory.java:192) at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:57) at org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:298) at org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:320) at org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:234) at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92) at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250) at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329) at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1428) at org.apache.wicket.RequestCycle.request(RequestCycle.java:545) at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:479) at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138) at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) .... There are ejb-module with bean and web-module with servlet and wicket web page deployed to GlassFish v2.1.1 server (if it makes any sense). What should I do to use my enterprise bean through remote interface in wicket webpage?

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• Why can't I use WCF DataContract and ISerializable on the same class?

  - by Dave

  Hi all, I have a class that I need to be able to serialize to a SQLServer session variable and be available over a WCF Service. I have declared it as follows namespace MyNM { [Serializable] [DataContract(Name = "Foo", Namespace = "http://www.mydomain.co.uk")] public class Foo : IEntity, ISafeCopy<Foo> { [DataMember(Order = 0)] public virtual Guid Id { get; set; } [DataMember(Order = 1)] public virtual string a { get; set; } DataMember(Order = 2)] public virtual Bar c { get; set; } /* ISafeCopy implementation */ } [Serializable] [DataContract(Name = "Bar ", Namespace = "http://www.mydomain.co.uk")] public class Bar : IEntity, ISafeCopy<Bar> { #region Implementation of IEntity DataMember(Order = 0)] public virtual Guid Id { get; set; } [DataMember(Order = 1)] public virtual Baz y { get; set; } #endregion /* ISafeCopy implementation*/ } [Serializable] [DataContract] public enum Baz { [EnumMember(Value = "one")] one, [EnumMember(Value = "two")] two, [EnumMember(Value = "three")] three } But when I try and call this service, I get the following error in the trace log. "System.Runtime.Serialization.InvalidDataContractException: Type 'BarProxybcb100e8617f40ceaa832fe4bb94533c' cannot be ISerializable and have DataContractAttribute attribute." If I take out the Serializable attribute, the WCF service works, but when the object can't be serialized to session. If I remove the DataContract attribute from class Bar, the WCF service fails saying Type 'BarProxy3bb05a31167f4ba492909ec941a54533' with data contract name 'BarProxy3bb05a31167f4ba492909ec941a54533:http://schemas.datacontract.org/2004/07/' is not expected. Add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer I've tried adding a KnownType attribute to the foo class [KnownType(typeof(Bar))] But I still get the same error. Can anyone help me out with this? Many thanks Dave

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• COM access to classic ASP intrinsic objects

  - by wrench

  I'm converting a VB6 COM object that works with classic ASP to a c# .Net COM Object Interop_COMSVCS.ObjectContext objContext; Interop_COMSVCS.AppServer objAppServer; objAppServer = null; // need to initialize before using objAppServer = new Interop_COMSVCS.AppServer(); objContext = objAppServer.GetObjectContext(); oApplication = (Interop_ASP.Application)objContext["Application"]; oSession = (Interop_ASP.Session)objContext["Session"]; oResponse = (Interop_ASP.Response)objContext["Response"]; oRequest = (Interop_ASP.Request)objContext["Request"]; oSession works to store local information to.from ASP storage oResponse can do simple writes to the browser BUT any code like oRequest.Cookies["sessionId"] or oResponse.Cookies["sessionId"] doesn't provide any sort of read or write access. Any cast or conversion I trry to do tells me I'm dealing with an empty or null System Object. There doesn't seem to be any sort of syntax to get/set the cookie collection. With COM+ I've seesn soem articles that indcate a switch for Access to ASP Intrinsic Objects -- that seesm to describe my issue, but I'd rather not use COM+. There are also some articles that indicate if I was using ASP.NET I could use HttpContext and HttpRequest/Response, but that's a completely different set of data objects that don't seem to be available with classic ASP. I've been stuck on this fopr a few days. Any help appreciated.

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• Django users and authentication from external source

  - by Boldewyn

  I have a Django app that gets it's data completely from an external source (queried via HTTP). That is, I don't have the option for a local database. Session data is stored in the cache (on my development server I use a SQLite database, so that is no error source). I'm using bleeding edge Django 1.1svn. Enter the problem: I want to use Django's own authentication system for the users. It seems quite simple to write my own Authentication Backend, but always just under the condition that you have a local database where to save the users. Without database my main problem is persistence. I tried it with the following (assume that datasource.get() is a function that returns some kind of dict): class ModelBackend (object): """Login backend.""" def authenticate (self, username=None, password=None): """Check, if a given user/password combination is valid""" data = datasource.get ('login', username, password) if data and data['ok']: return MyUser (username=username) else: raise TypeError return None def get_user (self, username): """get data about a specific user""" try: data = datasource.get ('userdata', username) if data and data['ok']: return data.user except: pass return None class MyUser (User): """Django user who isn't saved in DB""" def save (self): return None But the intentionally missing save() method on MyUser seems to break the session storage of a login. How should MyUser look like without a local database?

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• Call dll - pcshll32.dll using delphi

  - by Davis

  Hi, I need to call hllapi function of pcshll32.dll using delphi. It's works with personal communications of ibm. How can i change the code bellow to delphi ? Thanks !!! The EHLLAPI entry point (hllapi) is always called with the following four parameters: EHLLAPI Function Number (input) Data Buffer (input/output) Buffer Length (input/output) Presentation Space Position (input); Return Code (output) The prototype for IBM Standard EHLLAPI is: [long hllapi (LPWORD, LPSTR, LPWORD, LPWORD); The prototype for IBM Enhanced EHLLAPI is: [long hllapi (LPINT, LPSTR, LPINT, LPINT); Each parameter is passed by reference not by value. Thus each parameter to the function call must be a pointer to the value, not the value itself. For example, the following is a correct example of calling the EHLLAPI Query Session Status function: #include "hapi_c.h" struct HLDQuerySessionStatus QueryData; int Func, Len, Rc; long Rc; memset(QueryData, 0, sizeof(QueryData)); // Init buffer QueryData.qsst_shortname = ©A©; // Session to query Func = HA_QUERY_SESSION_STATUS; // Function number Len = sizeof(QueryData); // Len of buffer Rc = 0; // Unused on input hllapi(&Func, (char *)&QueryData, &Len, &Rc); // Call EHLLAPI if (Rc != 0) { // Check return code // ...Error handling } All the parameters in the hllapi call are pointers and the return code of the EHLLAPI function is returned in the value of the 4th parameter, not as the value of the function.

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• HTTP Basic authentication using Authlogic or authenticate_or_request_with_http_basic for API call?

  - by Gaius Parx

  I have a Rails 2.3.x app that implements the act_as_authentic in User model and a UserSession model as per Authlogic Github example. I am implementing an API to allow access from iPhone. Will be using HTTP Basic authentication via https (will not implement single access token). Each API call requires a username/password for the access. I am able to access the API by calling http://username:password@localhost:3000/books.xml for example. Authlogic will not persist if using the single access token. But I am using HTTP Basic which I think Authlogic will create session for the API calls, which is not used for my API methods. So for each API call I made, new session object is created. Thus appear to me that this would load up the server resource pretty quickly. Sounds like a bad idea. The alternative is to use the Rails authenticate_or_request_with_http_basic for API controllers. Example adding a before_filter: def require_http_auth_user authenticate_or_request_with_http_basic do |username, password| if @current_user = User.find_by_email(username) @current_user.valid_password?(password) else false end end end This will bypass the Authlogic UserSession and just use the User model. But this will involve using separate authentication codes in the app. Anyone has any comments and can share their experience? Thanks

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• ajax call to servlet puzzler

  - by vector

  Greetings! I'm having a problem getting a text value of a captcha from a servlet through ajax call. When my captcha gets created, its text value is written to session, but after refreshing the image itself though ajax call, I only get one old value of the text. Refreshing the image itself works ok, but I'm stuck getting the correct values from the session on subsequent call. On page reload I get both the new image and its new text value, no joy with ajax though. This works great for the image refresh: $("#asos").attr("src", "/ImageServlet?="+((new Date()).getTime()) ) This call to another method to get text value gives me old stuff: $.ajax({ url:"checkCaptcha", type:"GET", cache: false, success: function( data) { alert(data); } }); Any feedback will be appreciated. ps: here's the meat of the method getting the call: PrintWriter out = response.getWriter(); response.setContentType("text/html"); response.setDateHeader("Expires", 0 ); // Set standard HTTP/1.1 no-cache headers. response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate"); // Set IE extended HTTP/1.1 no-cache headers (use addHeader). response.addHeader("Cache-Control", "post-check=0, pre-check=0"); // Set standard HTTP/1.0 no-cache header. response.setHeader("Pragma", "no-cache"); out.print( request.getSession( ).getAttribute("randomPixValue") ); out.close();

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• Pseudo random numbers in php

  - by pg

  I have a function that outputs items in a different order depending on a random number. for example 1/2 of the time Popeye's and its will be #1 on the list and Taco Bell and its logo will be #2 and half the time the it will be the other way around. The problem is that when a user reloads or comes back to the page, the order is re-randomized. $Range here is the number of items in the db, so it's using a random number between 1 and the $range. $random = mt_rand(1,$range); for ($i = 0 ; $i < count($variants); $i++) { $random -= $variants[$i]['weight']; if ($random <= 0) { $chosenoffers[$tag] = $variants[$i]; break; } } I went to the beginning of the session and set this: if (!isset($_SESSION['rannum'])){ $_SESSION['rannum']=rand(1,100); } With the idea that I could replace the mt_rand in the function with some sort of pseudo random generator that used the same 1-100 random number as a seed throughout the session. That way i won't have to rewrite all the code that was already written. Am I barking up the wrong tree or is this a good idea?

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• How to get principal name from HTTPRequest in CXF JAX-RS webservice method called from android app.

  - by johnrock

  How can I get the principal name, session and ideally check if the principal is authenticated with the Spring Security context inside a CXF JAX-RS webservice method receiving a call from an Android client? This is the code I am currently working with. I have commented where and what I am trying to get. Android code to call webservice: httpclient.getCredentialsProvider().setCredentials( new AuthScope("192.168.1.101", 80), new UsernamePasswordCredentials("joesmith", "mypasswd")); HttpGet httpget = new HttpGet(WEBSERVICE_URL+"/makePayload"); httpget.setHeader("User-Agent", userAgent); httpget.setHeader("Content-Type", "application/xml"); HttpResponse response; try { response = httpclient.execute(httpget); HttpEntity entity = response.getEntity(); ... parse xml from response } CXF, Spring webservice code: @GET @Path("/getPayload") @Produces("application/XML") public Response makePayload(@Context Request request){ //Get user principal name //Get session? //Get Spring security context? Payload payload = new Payload(); payload.setUsersOnline(new Long(200)); return Response.ok().entity(payload).build(); }

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• nHibernate Domain Model and Mapping Files in Separate Projects

  - by Blake Blackwell

  Is there a way to separate out the domain objects and mapping files into two separate projects? I would like to create one project called MyCompany.MyProduct.Core that contains my domain model, and another project that is called MyCompany.MYProduct.Data.Oracle that contains my Oracle data mappings. However, when I try to unit test this I get the following error message: Named query 'GetClients' not found. Here is my mapping file: <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="MyCompany.MyProduct.Core" namespace="MyCompany.MyProduct.Core" > <class name="MyCompany.MyProduct.Core.Client" table="MY_CLIENT" lazy="false"> <id name="ClientId" column="ClientId"></id> <property name="ClientName" column="ClientName" /> <loader query-ref="GetClients"/> </class> <sql-query name="GetClients" callable="true"> <return class="Client" /> call procedure MyPackage.GetClients(:int_SummitGroupId) </sql-query> </hibernate-mapping> Here is my unit test: try { var cfg = new Configuration(); cfg.Configure(); cfg.AddAssembly( typeof( Client ).Assembly ); ISessionFactory sessionFactory = cfg.BuildSessionFactory(); IStatelessSession session = sessionFactory.OpenStatelessSession(); IQuery query = session.GetNamedQuery( "GetClients" ); query.SetParameter( "int_SummitGroupId", 3173 ); IList<Client> clients = query.List<Client>(); Assert.AreNotEqual( 0, clients.Count ); } catch( Exception ex ) { throw ex; } I think I may be improperly referencing the assembly, because if I do put the domain model object in the MyComapny.MyProduct.Data.Oracle class it works. Only when I separate out in to two projects do I run into this problem.

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