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• Oracle GoldenGate Active-Active Part 1

  - by Nick_W

  My name is Nick Wagner, and I'm a recent addition to the Oracle Maximum Availability Architecture (MAA) product management team.  I've spent the last 15+ years working on database replication products, and I've spent the last 10 years working on the Oracle GoldenGate product.  So most of my posting will probably be focused on OGG.  One question that comes up all the time is around active-active replication with Oracle GoldenGate.  How do I know if my application is a good fit for active-active replication with GoldenGate?   To answer that, it really comes down to how you plan on handling conflict resolution.  I will delve into topology and deployment in a later blog, but here is a simple architecture: The two most common resolution routines are host based resolution and timestamp based resolution. Host based resolution is used less often, but works with the fewest application changes.  Think of it like this: any transactions from SystemA always take precedence over any transactions from SystemB.  If there is a conflict on SystemB, then the record from SystemA will overwrite it.  If there is a conflict on SystemA, then it will be ignored.  It is quite a bit less restrictive, and in most cases, as long as all the tables have primary keys, host based resolution will work just fine.  Timestamp based resolution, on the other hand, is a little trickier. In this case, you can decide which record is overwritten based on timestamps. For example, does the older record get overwritten with the newer record?  Or vice-versa?  This method not only requires primary keys on every table, but it also requires every table to have a timestamp/date column that is updated each time a record is inserted or updated on the table.  Most homegrown applications can always be customized to include these requirements, but it's a little more difficult with 3rd party applications, and might even be impossible for large ERP type applications.  If your database has these features - whether it’s primary keys for host based resolution, or primary keys and timestamp columns for timestamp based resolution - then your application could be a great candidate for active-active replication.  But table structure is not the only requirement.  The other consideration applies when there is a conflict; i.e., do I need to perform any notification or track down the user that had their data overwritten?  In most cases, I don't think it's necessary, but if it is required, OGG can always create an exceptions table that contains all of the overwritten transactions so that people can be notified. It's a bit of extra work to implement this type of option, but if the business requires it, then it can be done. Unless someone is constantly monitoring this exception table or has an automated process in dealing with exceptions, there will be a delay in getting a response back to the end user. Ideally, when setting up active-active resolution we can include some simple procedural steps or configuration options that can reduce, or in some cases eliminate the potential for conflicts.  This makes the whole implementation that much easier and foolproof.  And I'll cover these in my next blog. 

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• Gaming on Cloud

  - by technomad

  Sometimes I wonder the pundits of cloud computing are way to consumed with the enterprise applications. With all the CAPEX / OPEX, ROI-talk taking the center stage, an opportunity to affect masses directly is getting overlooked. I am a self proclaimed die hard gamer. I come from the generation of gamers who started their journey in DOS games like Wolfenstein 3D and Allan Border Cricket (the latter is still a favorite pastime). In the late 90s, a revolution called accelerated graphics started in DirectX and OpenGL. Games got more advanced. Likes of Quake III and Unreal Tournament became the crown jewels of the industry. But with all these advancements, there started a race. A race of GFX giants ATI and NVIDIA to beat each other for better frame and image quality. Revisions to the graphics chipsets became frequent. Games became eye candies but at the cost of more GPU power / memory. Every eagerly awaited title started demanding more muscle power in graphics and PC hardware. Latest games and all the liquid smooth frame rates became the territory of the once with deep pockets who could spend lavishly on latest hardware. Enthusiasts like yours truly, who couldn’t afford this route, started exploring over-clocking, optimized hardware cooling... etc. to pursue the passion. Ever rising cost of hardware requirements lead to rampant piracy of PC games. Gamers were willing to spend on the latest titles, but the ones with tight budget prefer hardware upgrades against a legal copy of the game. It was also fueled by emergence of the P2P file sharing networks. Then came the era of Xbox and PS3s. It solved the major issue of hardware standardization and provided an alternative to ever increasing hardware costs. I have always admired these consoles, but being born and brought up in a keyboard/mouse environment, I still find it difficult to play first person shooters with a gamepad. I leave the topic of PC v/s Consol gaming for another day, but the bottom line is… PC gamers deserve an equally democratized solution. This is where I think Cloud Computing can come to rescue. It can minimize hardware requirements. Virtually end the software piracy and rationalize costs for gamers. Subscription based models like pay-as-you-play. In game rewards, like extended subscription credits for exceptional gamers (oh yes, I have beaten Xaero on nightmare in Quake III, time and again!) Easy deployment for patches and fixes. Better game AI. The list goes on and on… Fortunately, companies like OnLive are thinking in the same direction. Their gaming service is all set to launch on 17th June 2010 in E3 2010 expo in L.A. I wish them all the luck. I hope they will start a trend which will bring the smiles back on the face of budget gamers with the help of cloud computing.

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• SOA, Governance, and Drugs

  Why is IT governance important in service oriented architecture (SOA)? IT Governance provides a framework for making appropriate decisions based on company guidelines and accepted standards. This framework also outlines each stakeholder’s responsibilities and authority when making important architectural or design decisions. Furthermore, this framework of governance defines parameters and constraints that are used to give context and perspective when making decisions. The use of governance as it applies to SOA ensures that specific design principles and patterns are used when developing and maintaining services. When governance is consistently applied systems the following benefits are achieved according to Anne Thomas Manes in 2010. Governance makes sure that services conform to standard interface patterns, common data modeling practices, and promotes the incorporation of existing system functionality by building on top of other available services across a system. Governance defines development standards based on proven design principles and patterns that promote reuse and composition. Governance provides developers a set of proven design principles, standards and practices that promote the reduction in system based component dependencies.  By following these guidelines, individual components will be easier to maintain. For me personally, I am a fan of IT governance, and feel that it valuable part of any corporate IT department. However, depending on how it is implemented can really affect the value of using IT governance.  Companies need to find a way to ensure that governance does not become extreme in its policies and procedures. I know for me personally, I would really dislike working under a completely totalitarian or laissez-faire version of governance. Developers need to be able to be creative in their designs and too much governance can really impede the design process and prevent the most optimal design from being developed. On the other hand, with no governance enforced, no standards will be followed and accepted design patterns will be ignored. I have personally had to spend a lot of time working on this particular scenario and I have found that the concept of code reuse and composition is almost nonexistent.  Based on this, too much time and money is wasted on redeveloping existing aspects of an application that already exist within the system as a whole. I think moving forward we will see a staggered form of IT governance, regardless if it is for SOA or IT in general.  Depending on the size of a company and the size of its IT department,  I can see IT governance as a layered approach in that the top layer will be defined by enterprise architects that focus on abstract concepts pertaining to high level design, general  guidelines, acceptable best practices, and recommended design patterns.  The next layer will be defined by solution architects or department managers that further expand on abstracted guidelines defined by the enterprise architects. This layer will contain further definitions as to when various design patterns, coding standards, and best practices are to be applied based on the context of the solutions that are being developed by the department. The final layer will be defined by the system designer or a solutions architect assed to a project in that they will define what design patterns will be used in a solution, naming conventions, as well as outline how a system will function based on the best practices defined by the previous layers. This layered approach allows for IT departments to be flexible in that system designers have creative leeway in designing solutions to meet the needs of the business, but they must operate within the confines of the abstracted IT governance guidelines.  A real world example of this can be seen in the United States as it pertains to governance of the people in that the US government defines rules and regulations in the abstract and then the state governments take these guidelines and applies them based on the will of the people in each individual state. Furthermore, the county or city governments are the ones that actually enforce these rules based on how they are interpreted by local community.  To further define my example, the United States government defines that marijuana is illegal. Each individual state has the option to determine this regulation as it wishes in that the state of Florida determines that all uses of the drug are illegal, but the state of California legally allows the use of marijuana for medicinal purposes only. Based on these accepted practices each local government enforces these rules in that a police officer will arrest anyone in the state of Florida for having this drug on them if they walk down the street, but in California if a person has a medical prescription for the drug they will not get arrested.  REFERENCESThomas Manes, Anne. (2010). Understanding SOA Governance: http://www.soamag.com/I40/0610-2.php

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• bottom of Silverlight 3 control cut off with no vertical scrollbar if it is too big for browser wind

  - by sako73

  I have a silverlight control on a page. It is set to "Width=100% Height=100%", and the containing div is set to an absoulute position with "0" on all edges. On a small screen, when the silverlight content is taller than the screen, the bottom is cut off, and there is no scroll bar. Does anyone know how to solve this problem?

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• Is there a C pre-processor which eliminates #ifdef blocks based on values defined/undefined?

  - by Jonathan Leffler

  Original Question What I'd like is not a standard C pre-processor, but a variation on it which would accept from somewhere - probably the command line via -DNAME1 and -UNAME2 options - a specification of which macros are defined, and would then eliminate dead code. It may be easier to understand what I'm after with some examples: #ifdef NAME1 #define ALBUQUERQUE "ambidextrous" #else #define PHANTASMAGORIA "ghostly" #endif If the command were run with '-DNAME1', the output would be: #define ALBUQUERQUE "ambidextrous" If the command were run with '-UNAME1', the output would be: #define PHANTASMAGORIA "ghostly" If the command were run with neither option, the output would be the same as the input. This is a simple case - I'd be hoping that the code could handle more complex cases too. To illustrate with a real-world but still simple example: #ifdef USE_VOID #ifdef PLATFORM1 #define VOID void #else #undef VOID typedef void VOID; #endif /* PLATFORM1 */ typedef void * VOIDPTR; #else typedef mint VOID; typedef char * VOIDPTR; #endif /* USE_VOID */ I'd like to run the command with -DUSE_VOID -UPLATFORM1 and get the output: #undef VOID typedef void VOID; typedef void * VOIDPTR; Another example: #ifndef DOUBLEPAD #if (defined NT) || (defined OLDUNIX) #define DOUBLEPAD 8 #else #define DOUBLEPAD 0 #endif /* NT */ #endif /* !DOUBLEPAD */ Ideally, I'd like to run with -UOLDUNIX and get the output: #ifndef DOUBLEPAD #if (defined NT) #define DOUBLEPAD 8 #else #define DOUBLEPAD 0 #endif /* NT */ #endif /* !DOUBLEPAD */ This may be pushing my luck! Motivation: large, ancient code base with lots of conditional code. Many of the conditions no longer apply - the OLDUNIX platform, for example, is no longer made and no longer supported, so there is no need to have references to it in the code. Other conditions are always true. For example, features are added with conditional compilation so that a single version of the code can be used for both older versions of the software where the feature is not available and newer versions where it is available (more or less). Eventually, the old versions without the feature are no longer supported - everything uses the feature - so the condition on whether the feature is present or not should be removed, and the 'when feature is absent' code should be removed too. I'd like to have a tool to do the job automatically because it will be faster and more reliable than doing it manually (which is rather critical when the code base includes 21,500 source files). (A really clever version of the tool might read #include'd files to determine whether the control macros - those specified by -D or -U on the command line - are defined in those files. I'm not sure whether that's truly helpful except as a backup diagnostic. Whatever else it does, though, the pseudo-pre-processor must not expand macros or include files verbatim. The output must be source similar to, but usually simpler than, the input code.) Status Report (one year later) After a year of use, I am very happy with 'sunifdef' recommended by the selected answer. It hasn't made a mistake yet, and I don't expect it to. The only quibble I have with it is stylistic. Given an input such as: #if (defined(A) && defined(B)) || defined(C) || (defined(D) && defined(E)) and run with '-UC' (C is never defined), the output is: #if defined(A) && defined(B) || defined(D) && defined(E) This is technically correct because '&&' binds tighter than '||', but it is an open invitation to confusion. I would much prefer it to include parentheses around the sets of '&&' conditions, as in the original: #if (defined(A) && defined(B)) || (defined(D) && defined(E)) However, given the obscurity of some of the code I have to work with, for that to be the biggest nit-pick is a strong compliment; it is valuable tool to me. The New Kid on the Block Having checked the URL for inclusion in the information above, I see that (as predicted) there is an new program called Coan that is the successor to 'sunifdef'. It is available on SourceForge and has been since January 2010. I'll be checking it out...further reports later this year, or maybe next year, or sometime, or never.

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• How to change the data in Telerik's RadGrid based on Calendar's selected dates?

  - by Jronny

  I was creating another usercontrol with Telerik's RadGrid and Calendar. <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %> <table class="style1"> <tr> <td>From</td> <td>To</td> </tr> <tr> <td><asp:Calendar ID="Calendar1" runat="server" SelectionMode="Day"></asp:Calendar></td> <td><asp:Calendar ID="Calendar2" runat="server" SelectionMode="Day"></asp:Calendar></td> </tr> <tr> <td><asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" /></td> <td><asp:Button ID="btnClear" runat="server" Text="Clear" OnClick="btnClear_Click" /></td> </tr> </table> <telerik:RadGrid ID="RadGrid1" runat="server"> <MasterTableView CommandItemDisplay="Top"></MasterTableView> </telerik:RadGrid> and I am using Linq in code-behind: Entities1 entities = new Entities1(); public static object DataSource = null; protected void Page_Load(object sender, EventArgs e) { if (DataSource == null) { DataSource = (from entity in entities.nsc_moneytransaction select new { date = entity.transaction_date.Value, username = entity.username, cashbalance = entity.cash_balance }).OrderByDescending(a => a.date); } BindData(); } public void BindData() { RadGrid1.DataSource = DataSource; } protected void btnSubmit_Click(object sender, EventArgs e) { DateTime startdate = new DateTime(); DateTime enddatedate = new DateTime(); if (Calendar1.SelectedDate != null && Calendar2.SelectedDate != null) { startdate = Calendar1.SelectedDate; enddatedate = Calendar2.SelectedDate; var queryDateRange = from entity in entities.nsc_moneytransaction where DateTime.Parse(entity.transaction_date.Value.ToShortDateString()) >= DateTime.Parse(startdate.ToShortDateString()) && DateTime.Parse(entity.transaction_date.Value.ToShortDateString()) <= DateTime.Parse(enddatedate.ToShortDateString()) select new { date = entity.transaction_date.Value, username = entity.username, cashbalance = entity.cash_balance }; DataSource = queryDateRange.OrderByDescending(a => a.date); } else if (Calendar1.SelectedDate != null) { startdate = Calendar1.SelectedDate; var querySetDate = from entity in entities.nsc_moneytransaction where entity.transaction_date.Value == startdate select new { date = entity.transaction_date.Value, username = entity.username, cashbalance = entity.cash_balance }; DataSource = querySetDate.OrderByDescending(a => a.date); ; } BindData(); } protected void btnClear_Click(object sender, EventArgs e) { Calendar1.SelectedDates.Clear(); Calendar2.SelectedDates.Clear(); } The problems are, (1) when I click the submit button. the data in the RadGrid is not changed. (2) how can we check if there is nothing selected in the Calendar controls, because there is a date (01/01/0001) set even if we do not select anything from that calendar, thus Calendar1.SelectedDate != null is not enough. =( Thanks.

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• Please give the solution of the following programs in R Programming

  - by NEETHU

  Table below gives data concerning the performance of 28 national football league teams in 1976.It is suspected that the no. of yards gained rushing by opponents(x8) has an effect on the no. of games won by a team(y) (a)Fit a simple linear regression model relating games won by y to yards gained rushing by opponents x8. (b)Construct the analysis of variance table and test for significance of regression. (c)Find a 95% CI on the slope. (d)What percent of the total variability in y is explained by this model. (e)Find a 95% CI on the mean number of games won in opponents yards rushing is limited to 2000 yards. Team y x8 1 10 2205 2 11 2096 3 11 1847 4 13 1803 5 10 1457 6 11 1848 7 10 1564 8 11 1821 9 4 2577 10 2 2476 11 7 1984 12 10 1917 13 9 1761 14 9 1709 15 6 1901 16 5 2288 17 5 2072 18 5 2861 19 6 2411 20 4 2289 21 3 2203 22 3 2592 23 4 2053 24 10 1979 25 6 2048 26 8 1786 27 2 2876 28 0 2560 Suppose we would like to use the model developed in problem 1 to predict the no. of games a team will win if it can limit opponents yards rushing to 1800 yards. Find a point estimate of the no. of games won when x8=1800.Find a 905 prediction interval on the no. of games won. The purity of Oxygen produced by a fractionation process is thought to be percentage of Hydrocarbon in the main condenser of the processing unit .20 samples are shown below. Purity(%) Hydrocarbon(%) 86.91 1.02 89.85 1.11 90.28 1.43 86.34 1.11 92.58 1.01 87.33 0.95 86.29 1.11 91.86 0.87 95.61 1.43 89.86 1.02 96.73 1.46 99.42 1.55 98.66 1.55 96.07 1.55 93.65 1.4 87.31 1.15 95 1.01 96.85 0.99 85.2 0.95 90.56 0.98 (a)Fit a simple linear regression model to the data. (b)Test the hypothesis H0:ß=0 (c)Calculate R2 . (d)Find a 95% CI on the slope. (e)Find a 95% CI on the mean purity and the Hydrocarbon % is 1. Consider the Oxygen plant data in Problem3 and assume that purity and Hydrocarbon percentage are jointly normally distributed r.vs (a)What is the correlation between Oxygen purity and Hydrocarbon% (b)Test the hypothesis that ?=0. (c)Construct a 95% CI for ?.

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• How to solve TPTP Monitor error ( IWAT0435E ) in Eclipse, on Debian-based Linux?

  - by Grundlefleck

  After installing Test & Performance Tools Platform in Eclipse Ganymede on, whenever I tried to profile a Java application, I was confronted by the launch configuration dialogue which contained an error along the lines of: Error IWAT0435E could not connect to host How is this problem fixed?

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• Spring 3 simple extentionless url mappings with annotation-based mapping - impossible?

  - by caerphilly

  Hi, I'm using Spring 3, and trying to set up a simple web-app using annotations to define controller mappings. This seems to be incredibly difficult without peppering all the urls with *.form or *.do Because part of the site needs to be password protected, these urls are all under /secure. There is a <security-constraint> in the web.xml protecting everything under that root. I want to map all the Spring controllers to /secure/app/. Example URLs would be: /secure/app/landingpage /secure/app/edit/customer/{id} each of which I would handle with an appropriate jsp/xml/whatever. So, in web.xml I have this: <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/secure/app/*</url-pattern> </servlet-mapping> And in despatcher-servlet.xml I have this: <context:component-scan base-package="controller" /> In the Controller package I have a controller class: package controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; @Controller @RequestMapping("/secure/app/main") public class HomePageController { public HomePageController() { } @RequestMapping(method = RequestMethod.GET) public ModelAndView getPage(HttpServletRequest request) { ModelAndView mav = new ModelAndView(); mav.setViewName("main"); return mav; } } Under /WEB-INF/jsp I have a "main.jsp", and a suitable view resolver set up to point to this. I had things working when mapping the despatcher using *.form, but can't get anything working using the above code. When Spring starts up it appears to map everything correctly: 13:22:36,762 INFO main annotation.DefaultAnnotationHandlerMapping:399 - Mapped URL path [/secure/app/main] onto handler [controller.HomePageController@2a8ab08f] I also noticed this line, which looked suspicious: 13:25:49,578 DEBUG main servlet.DispatcherServlet:443 - No HandlerMappings found in servlet 'dispatcher': using default And at run time any attempt to view /secure/app/main just returns a 404 error in Tomcat, with this log output: 13:25:53,382 DEBUG http-8080-1 servlet.DispatcherServlet:842 - DispatcherServlet with name 'dispatcher' determining Last-Modified value for [/secure/app/main] 13:25:53,383 DEBUG http-8080-1 servlet.DispatcherServlet:850 - No handler found in getLastModified 13:25:53,390 DEBUG http-8080-1 servlet.DispatcherServlet:690 - DispatcherServlet with name 'dispatcher' processing GET request for [/secure/app/main] 13:25:53,393 WARN http-8080-1 servlet.PageNotFound:962 - No mapping found for HTTP request with URI [/secure/app/main] in DispatcherServlet with name 'dispatcher' 13:25:53,393 DEBUG http-8080-1 servlet.DispatcherServlet:677 - Successfully completed request So... Spring maps a URL, and then "forgets" about that mapping a second later? What is going on? Thanks.

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• Multi-file, simultaneous, drag-and-drop file uploads in the browser without ActiveX?

  - by qiq

  I like how Windows Skydrive lets you drag files into Internet Explorer where an ActiveX component uploads those files to your Skydrive account in a queue. This avoids the cumbersome traditional HTML approach where you present multiple "Browse" buttons and the user has to select individual files one by one, click Upload and then select more files after the first batch completes. What I'm not sure is how the same effect could be achieved in a web app without ActiveX. Any suggestions?

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• Javascript floodlight tracking iframe leaves browser window blank, please help!

  - by Ben Paton

  Hello, I have been asked to implement a javascript floodlight tag onto my site which is to be called everytime a customer downloads a pdf file. I have tried to implement this as follows: <script type="text/javascript"> function appForm() { var axel = Math.random() + ""; var a = axel * 10000000000000; document.write('<IFRAME SRC="http://fls.doubleclick.net/activityi;src=1234567;type=count123;cat=123do456;ord=1;num='+ a + '?" WIDTH=1 HEIGHT=1 FRAMEBORDER=0></IFRAME>'); return false; } <a href="appForm.pdf" target="_blank" onClick="appForm();">Download PDF</a> This seems to almost work. The pdf file opens in a new window. But the window where you clicked the download link turns blank. Is there a way of opening this tracking iframe and then having the pdf opening without the parent window going blank? Your help will be very much appreciated on this.

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• How can I line up WPF items in a Horizontal WrapPanel so they line up based on an arbitrary vertical

  - by Scott Whitlock

  I'm trying to create a View in WPF and having a hard time figuring out how to set it up. Here's what I'm trying to build: My ViewModel exposes an IEnumerable property called Items Each item is an event on a timeline, and each one implements ITimelineItem The ViewModel for each item has it's own DataTemplate to to display it I want to display all the items on the timeline connected by a line. I'm thinking a WrapPanel inside of a ListView would work well for this. However, the height of each item will vary depending on the information it displays. Some items will have graphic objects right on the line (like a circle or a diamond, or whatever), and some have annotations above or below the line. So it seems complicated to me. It seems that each item on the timeline has to render its own segment of the line. That's fine. But the distance between the top of the item to the line (and the bottom of the item to the line) could vary. If one item has the line 50 px down from the top and the next item has the line 100 px down from the top, then the first item needs 50 px of padding so that the line segments add up. I think I could solve that problem, however, we only need to add padding if these two items are on the same line in the WrapPanel! Let's say there are 5 items and only room on the screen for 3 across... the WrapPanel will put the other two on the next line. That's ok, but that means only the first 3 need to pad together, and the last 2 need to pad together. This is what's giving me a headache. Is there another approach I could look at?

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• Geb not working with chrome driver

  - by user2346867

  @Grapes([ @Grab("org.gebish:geb-core:0.9.0"), @Grab("org.gebish:geb-spock:0.9.0"), @Grab("org.seleniumhq.selenium:selenium-firefox-driver:2.33.0"), @Grab("org.seleniumhq.selenium:selenium-chrome-driver:2.33.0"), @Grab("org.seleniumhq.selenium:selenium-support:2.26.0"), @Grab( group='org.spockframework', module='spock-core', version='0.3' ), @Grab(group='org.gebish', module='geb-implicit-assertions', version='0.9.0') ]) import geb.Browser import geb.spock.GebReportingSpec import org.openqa.selenium.chrome.* import spock.lang.Specification import geb.navigator.NonEmptyNavigator import geb.navigator.factory.* System.setProperty("webdriver.chrome.driver", "C:\\chromedriver\\chromedriver.exe"); def browser = new Browser(driver: new ChromeDriver()) browser.go "http://www.google.com/" assert browser.title == "Google" browser.$("input", name: "q").value("query") When i try to run the above code i am getting the following error WARNING: Sanitizing stacktrace: java.lang.NoClassDefFoundError: Could not initialize class geb.navigator.NonEmptyNavigator at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:171) at geb.navigator.factory.DefaultInnerNavigatorFactory.class$(DefaultInnerNavigatorFactory.groovy) at geb.navigator.factory.DefaultInnerNavigatorFactory.$get$$class$geb$navigator$NonEmptyNavigator(DefaultInnerNavigatorFactory.groovy) at geb.navigator.factory.DefaultInnerNavigatorFactory.createNavigator(DefaultInnerNavigatorFactory.groovy:40) at geb.navigator.factory.InnerNavigatorFactory$createNavigator.call(Unknown Source) at geb.navigator.factory.AbstractNavigatorFactory.createFromWebElements(AbstractNavigatorFactory.groovy:44) at geb.navigator.factory.NavigatorFactory$createFromWebElements.callCurrent(Unknown Source) at geb.navigator.factory.BrowserBackedNavigatorFactory.getBase(BrowserBackedNavigatorFactory.groovy:33) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233) at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:1671) at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:3408) at geb.navigator.factory.AbstractNavigatorFactory.getProperty(AbstractNavigatorFactory.groovy) at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:47) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:227) at geb.content.NavigableSupport.getNavigator(NavigableSupport.groovy:39) at geb.content.NavigableSupport.$(NavigableSupport.groovy:96) at geb.content.NavigableSupport$$.call(Unknown Source) at geb.Page.$(Page.groovy) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90) at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1085) at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:909) at org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:848) at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:831) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:164) at geb.Browser.methodMissing(Browser.groovy:193) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90) at groovy.lang.MetaClassImpl.invokeMissingMethod(MetaClassImpl.java:837) Any idea on this how to resolve it ???

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• Browser connects to WCF service but not my WCF client. What can be the reason?

  - by Slauma

  On a production server (Windows Server 2003 SP2) I can connect to a remote WCF service with Internet Explorer 8: When I browse to the URL http://www.domain.com/Service.svc (where my service listens) I get the expected info page of the service displayed. Connection settings in Internet Explorer only specify "auto detect", proxy settings are disabled. If I start a console application (built with WCF in .NET 4.0) on the same server which also tries to connect to the same WCF service it fails telling me that no endpoint was available listening on http://www.domain.com/Service.svc. Configuration of the WCF client: <configuration> <system.serviceModel> <bindings> <wsHttpBinding> <binding name="WSHttpBinding_IMyService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" /> <security mode="None"> <transport clientCredentialType="Windows" proxyCredentialType="None" realm="" /> <message clientCredentialType="Windows" negotiateServiceCredential="true"/> </security> </binding> </wsHttpBinding> </bindings> <client> <endpoint address="http://www.domain.com/Service.scv" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IMyService" contract="Service.IMyService" name="WSHttpBinding_IMyService" /> </client> </system.serviceModel> <configuration> With these settings I can communicate successfully with the remote service from my development machine. Looking around for other options I found that I can specify to use the Internet Explorer proxy settings with: <system.net> <defaultProxy> <proxy usesystemdefault="true" /> </defaultProxy> </system.net> It didn't work and I am not sure if I understood this setting really correctly. (My hope was that the WCF client will adopt the "autodetect" setting of Internet Explorer and then connect the same way to the service like the installed IE.) I also had toggled the useDefaultWebProxy setting in the binding configuration between true and false with no success. Now I am asking for help what I can do? Which settings might be wrong or missing? What could I test and how can I get more detailed error messages to better identify the problem? Thank you in advance!

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• PHP, Codeigniter: How to Set Date/Time based on users timezone/location globally in a web app?

  - by Abs

  Hello all, I have just realised if I add a particular record to my MySQL database - it will have a date/time of the server and not the particular user and where they are located which means my search function by date is useless! As they will not be able to search by when they have added it in their timezone rather when it was added in the servers timezone. Is there a way in Codeigniter to globally set time and date specific to a users location (maybe using their IP) and every time I call date() or time() that users timezone is used. What I am actually asking for is probably how to make my application dependent on each users timezone? Maybe its better to store each users timezone in their profile and have a standard time (servers time) and then convert the time to for each user? Thanks all

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• In Reporting Services how to filter drop down parameter list in based on other selected parameter?

  - by Lee Englestone

  Question In a Reporting Services Report, How do I filter a second drop down list of cars to only show cars whose ManufacturerId is equal the selected Manufacturer (from the first drop down list)? Report Datasets I have 2 datasets. Dataset 1. A list of Manufacturers. From a stored procedure Report_Manufacturers_P Dataset 2. A list of Cars, including a column called Manufacturers id. From a stored procedure Report_Cars_P Report Parameters On the Report I have 2 Parameters. Parameter 1. ManufacturerId. Set from A drop down list of Manufacturers (DataSet 1). Parameter 2. CarId. Set from A drop down list of Cars (DataSet 2). I've tried.. Creating another sproc called Report_Manufacturer_Cars_P that takes the ManufacturerId as an integer and returns a list of cars made by that manufacturer. Any Ideas. As selecting a Manufacturer doesn't seem to want to kick off anything that filters the Car list? Thanks in advance, -- Lee

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• Is it possible to mix MEF and Unity within a MEF-based plugin?

  - by Dave

  I'm finally diving into Unity head first, and have run into my first real problem. I've been gradually changing some things in my app from being MEF-resolved to Unity-resolved. Everything went fine on the application side, but then I realized that my plugins were not being loaded. I started to look into this issue, and I believe it's a case where MEF and Unity don't mix. Plugins are loaded by MEF, but each plugin needs to get access to the shared libraries in my application, like app preferences, logging, etc. Initially, my plugin constructor had the ImportingConstructor attribute. I then replaced it with InjectionConstructor so that Unity could resolve its shared library dependencies. But because I did that, MEF no longer loaded it! Then I used both attributes, which compiled, but then I got a composition error (MEF). I figured that this was because the constructor takes a parameter that was once resolved by a MEF Import, so I removed all parameters. As expected, now MEF was able to load my plugin, but because the constructor needs to call into the interface that was once passed in, construction fails. So now I'm at a point where I can get MEF to start to load my plugin, but can't do anything with it because the plugin relies on shared libraries that are registered with Unity. For those of you that have successfully mixed MEF and Unity, how do you go about resolving the references to the shared libraries with Unity?

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• opengl paint program based on Apple's 'glPaint' on a white background - how to blend?

  - by Adam

  Trying to write a simple paint program for iPhone, and I'm using Apple's glPaint sample as a guide. The only problem is, painting doesn't work on a white background, since white + colour = white. I've tried different blending functions, but haven't been able to hit on the right combination of settings and/or brushes to make this work. I've seen similar posts about this problem but no answers. Does anyone know how this might work?

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• Flex 4 : How to automaticaly resize the button based on content ?

  - by Anthony

  Hi everybody ! I would like to automaticaly resize my button (spark button) according it content (label text) ? Thanks all for your help ! Anthony

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• How to add theme settings to Zen-based themes?

  - by barraponto

  I'm trying to place my own theme settings into a drupal subtheme. i've used the forms API in theme-settings.php but they are not showing up in admin/build/themes/settings/$mytheme. my theme-settings.php is uploaded here in case you'd like to see it. what it does is choose vocabularies for categories and tags, making it easier to port wordpress blogs to drupal.

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• TCP-Connection Establishment = How to measure time based on Ping RRT?

  - by Tom

  Hello Experts, I would be greatful for help, understanding how long it takes to establish a TCP connection when I have the Ping RoundTripTip: According to Wikipedia a TCP Connection will be established in three steps: 1.SYN-SENT (=>CLIENT TO SERVER) 2.SYN/ACK-RECEIVED (=>SERVER TO CLIENT) 3.ACK-SENT (=>CLIENT TO SERVER) My Questions: Is it correct, that the third transmission (ACK-SENT) will not yet carry any payload (my data) but is only used for the connection establishement.(This leads to the conclusion, that the fourth packt will be the first packt to hold any payload....) Is it correct to assume, that when my Ping RoundTripTime is 20 milliseconds, that in the example given above, the TCP Connection establishment would at least require 30 millisecons, before any data can be transmitted between the Client and Server? Thank you very much Tom

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• How to convert this code-based WPF tooltip to Silverlight?

  - by Edward Tanguay

  The following ToolTip code works in WPF. I'm trying to get it to work in Silverlight. But it gives me these errors: TextBlock does not contain a definition for ToolTip. Cursors does not contain a definition for Help. ToolTipService does not contain a definition for SetInitialShowDelay. How can I get this to work in Silverlight? using System.Windows; using System.Windows.Controls; using System.Windows.Input; using System.Windows.Media; namespace TestHover29282 { public partial class Window1 : Window { public Window1() { InitializeComponent(); AddCustomer("Jim Smith"); AddCustomer("Joe Jones"); AddCustomer("Angie Jones"); AddCustomer("Josh Smith"); } void AddCustomer(string name) { TextBlock tb = new TextBlock(); tb.Text = name; ToolTip tt = new ToolTip(); tt.Content = "This is some info on " + name + "."; tb.ToolTip = tt; tt.Cursor = Cursors.Help; ToolTipService.SetInitialShowDelay(tb, 0); MainStackPanel.Children.Add(tb); } } }

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• how to add a sidebar to a .net page based on a master page that doesnt have a sidebar.

  - by UXdesigner

  Hello, I have been told that I should add a sidebar to one page of this .net project, but the master page don't include a sidebar. How can I add a sidebar to one page only ? This is the code for the Master Template, can anyone suggest or help me out here? I'd buy a book and read more, but I have to do this for the next 12 hours. <%@ Master Language="C#" AutoEventWireup="true" CodeFile="Public.master.cs" Inherits="Public" %> <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc2" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <%--<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> --%><html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <%--<link href="favicon.ico" rel="Shortcut Icon" type="image/x-icon" />--%> <link href="<%= Server.MapPath("~/css/main2.css") %>" rel="stylesheet" type="text/css" media="all" /> <link href="<%= Server.MapPath("~/css/dropdown.css") %>" media="screen" rel="stylesheet" type="text/css" /> <link href="<%= Server.MapPath("~/css/default.advanced.css") %>" media="screen" rel="stylesheet" type="text/css" /> <link href="<%= Server.MapPath("~/css/vlightbox.css") %>" rel="stylesheet" type="text/css" /> <link href="<%= Server.MapPath("~/css/visuallightbox.css") %>" rel="stylesheet" type="text/css" media="screen" /> <link href="<%= Server.MapPath("~/boxes.css") %>"rel="stylesheet" type="text/css" media="screen" /> <script src="<%= Server.MapPath("~/engine/js/jquery.min.js") %>" ype="text/javascript"></script> <script src="<%= Server.MapPath("~/js/cufon-yui.js") %>" type="text/javascript"></script> <script src="<%= Server.MapPath("~/js/AFB_400.font.js") %>" type="text/javascript"></script> <style type="text/css"> #vlightbox a#vlb { display:none } </style> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" ></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.5.3/jquery-ui.min.js" ></script> <script type="text/javascript"> Cufon.replace('h2'); </script> <script type="text/javascript"> Cufon.replace('h3'); </script> <script type="text/javascript"> Cufon.replace('h5'); </script> <!--[if IE 8]> <style type="text/css"> #footer {display:table;} </style> <![endif]--> <style> ul#nav { width:100%; height:36px; display:block; background-color:#000; background-repeat:repeat-x; } #wrapthatbanner {display:block; float:left; width:100%; height:529px; margin-left:-20px; margin-bottom:0px; } </style> <script type='text/javascript' src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js?ver=1.3.2'></script> <script type="text/javascript"> $(document).ready(function() { $("#footer").stickyFooter(); }); // sticky footer plugin (function($) { var footer; $.fn.extend({ stickyFooter: function(options) { footer = this; positionFooter(); $(window) .scroll(positionFooter) .resize(positionFooter); function positionFooter() { var docHeight = $(document.body).height() - $("#sticky-footer-push").height(); if (docHeight < $(window).height()) { var diff = $(window).height() - docHeight; if (!$("#sticky-footer-push").length > 0) { $(footer).before('<div id="sticky-footer-push"></div>'); } $("#sticky-footer-push").height(diff); } } } }); })(jQuery); </script> </head> <body id="@@(categoria)@@"> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" AsyncPostBackTimeout="900"></asp:ScriptManager> <div id="container"> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <div id="header"> <div id="headerlink"> <table width="100%" border="0"> <tr> <td height="77px;" width="67%"> <asp:ImageButton PostBackUrl="~/index.aspx" ImageUrl="~/images/Titulos/5.png" runat="server" alt="" name="screen_logo" width="257" hspace="10" vspace="10" border="0" id="screen_logo" title="" /> </td> <td valign="top" align="right" width="33%"> <table> <tr> <td> <asp:Label ID="lblFullMessage" Visible="false" runat="server" Font-Size="X-Small" ForeColor="White" Text="Please enter the {0}, {1} and {2} characters from your password."></asp:Label> </td> </tr> <tr valign="middle"> <td> <img src="../images/login.jpg"</td> <td valign="top"> <asp:TextBox runat="server" Height="16px" Font-Size="Small" ID="txtLogin" Width="100px"></asp:TextBox> <asp:Button ID="btnLogin" Height="20px" Font-Size="X-Small" runat="server" Text="Go" OnClick="btnLogin_Click" /> </td> </tr> <tr> <td> <asp:Label ID="lblError" Visible="false" runat="server" Font-Size="X-Small" ForeColor="Red" Text="Error"></asp:Label> </td> </tr> </table> </td> </tr> </table> </div> </div> </ContentTemplate> </asp:UpdatePanel> <ul id="nav" class="dropdown dropdown-horizontal"> <li><asp:HyperLink NavigateUrl="~/index.aspx" CssClass="dir" runat="server" ID="lnk1">Home</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk3">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk4">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk7">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk5">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk2">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk6">link</asp:HyperLink></li> </ul> <div id="wmfg"> </div> <div id="content"><asp:ContentPlaceHolder ID="Content1" runat="server"> </asp:ContentPlaceHolder></div> <div id="footer">Footer</div> </div> </form> </body> </html>

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• Do you guys know of any good File based caching for PHP?

  - by Scott Faisal

  The data to be cached is going to be HTML files and are to be retained anywhere from 3 days to a week. My understanding is that memcached would not be a good solution here since if the server goes down, we lose everything. Thank You

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• Is there an HTML browser rendering engine for Ruby?

  - by Jose

  Given a URL, I would like to be able to render the returned HTML to know width and height for each div, fonts' size for each piece of text, color of each element, position of each element on screen, etc. A possible approach could be traversing the DOM tree with Hpricot and checking CSS style by parsing the associated stylesheet using css_parser gem. But this would not consider default styles, inheritance, floats, etc. In Java there's Cobra, a Java Web Renderer, which is able to render a web page and query attributes like width, font size, etc. for each fragment. I could use Cobra with JRuby or similar solutions, but prefer a Ruby native tool. Is there any library like this for Ruby?

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