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  • Clustering on WebLogic exception on Failover

    - by Markos Fragkakis
    Hi all, I deploy an application on a WebLogic 10.3.2 cluster with two nodes, and a load balancer in front of the cluster. I have set the <core:init distributable="true" debug="true" /> My Session and Conversation classes implement Serializable. I start using the application being served by the first node. The console shows that the session replication is working. <Jun 17, 2010 11:43:50 AM EEST> <Info> <Cluster> <BEA-000128> <Updating 5903057688359791237S:xxx.yyy.gr:[7002,7002,-1,-1,-1,-1,-1]:xxx.yyy.gr:7002,xxx.yyy.gr:7002:prs_domain:PRS_Server_2 in the cluster.> <Jun 17, 2010 11:43:50 AM EEST> <Info> <Cluster> <BEA-000128> <Updating 5903057688359791237S:xxx.yyy.gr:[7002,7002,-1,-1,-1,-1,-1]:xxx.yyy.gr:7002,xxx.yyy.gr:7002:prs_domain:PRS_Server_2 in the cluster.> When I shutdown the first node from the Administration console, I get this in the other node: <Jun 17, 2010 11:23:46 AM EEST> <Error> <Kernel> <BEA-000802> <ExecuteRequest failed java.lang.NullPointerException. java.lang.NullPointerException at org.jboss.seam.intercept.JavaBeanInterceptor.callPostActivate(JavaBeanInterceptor.java:165) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:73) at com.myproj.beans.SortingFilteringBean_$$_javassist_seam_2.sessionDidActivate(SortingFilteringBean_$$_javassist_seam_2.java) at weblogic.servlet.internal.session.SessionData.notifyActivated(SessionData.java:2258) at weblogic.servlet.internal.session.SessionData.notifyActivated(SessionData.java:2222) at weblogic.servlet.internal.session.ReplicatedSessionData.becomePrimary(ReplicatedSessionData.java:231) at weblogic.cluster.replication.WrappedRO.changeStatus(WrappedRO.java:142) at weblogic.cluster.replication.WrappedRO.ensureStatus(WrappedRO.java:129) at weblogic.cluster.replication.LocalSecondarySelector$ChangeSecondaryInfo.run(LocalSecondarySelector.java:542) at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201) at weblogic.work.ExecuteThread.run(ExecuteThread.java:173) > What am I doing wrong? This is the SortingFilteringBean: import java.util.HashMap; import java.util.LinkedHashMap; import org.jboss.seam.ScopeType; import org.jboss.seam.annotations.Name; import org.jboss.seam.annotations.Scope; import com.myproj.model.crud.Filtering; import com.myproj.model.crud.Sorting; import com.myproj.model.crud.SortingOrder; /** * Managed bean aggregating the sorting and filtering values for all the * application's lists. A light-weight bean to always keep in the session with * minimum impact. */ @Name("sortingFilteringBean") @Scope(ScopeType.SESSION) public class SortingFilteringBean extends BaseManagedBean { private static final long serialVersionUID = 1L; private Sorting applicantProductListSorting; private Filtering applicantProductListFiltering; private Sorting homePageSorting; private Filtering homePageFiltering; /** * Creates a new instance of SortingFilteringBean. */ public SortingFilteringBean() { // ********************** // Applicant Product List // ********************** // Sorting LinkedHashMap<String, SortingOrder> applicantProductListSortingValues = new LinkedHashMap<String, SortingOrder>(); applicantProductListSortingValues.put("applicantName", SortingOrder.ASCENDING); applicantProductListSortingValues.put("applicantEmail", SortingOrder.ASCENDING); applicantProductListSortingValues.put("productName", SortingOrder.ASCENDING); applicantProductListSortingValues.put("productEmail", SortingOrder.ASCENDING); applicantProductListSorting = new Sorting( applicantProductListSortingValues); // Filtering HashMap<String, String> applicantProductListFilteringValues = new HashMap<String, String>(); applicantProductListFilteringValues.put("applicantName", ""); applicantProductListFilteringValues.put("applicantEmail", ""); applicantProductListFilteringValues.put("productName", ""); applicantProductListFilteringValues.put("productEmail", ""); applicantProductListFiltering = new Filtering( applicantProductListFilteringValues); // ********* // Home page // ********* // Sorting LinkedHashMap<String, SortingOrder> homePageSortingValues = new LinkedHashMap<String, SortingOrder>(); homePageSortingValues.put("productName", SortingOrder.ASCENDING); homePageSortingValues.put("productId", SortingOrder.ASCENDING); homePageSortingValues.put("productAtcCode", SortingOrder.UNSORTED); homePageSortingValues.put("productEmaNumber", SortingOrder.UNSORTED); homePageSortingValues.put("productOrphan", SortingOrder.UNSORTED); homePageSortingValues.put("productRap", SortingOrder.UNSORTED); homePageSortingValues.put("productCorap", SortingOrder.UNSORTED); homePageSortingValues.put("applicationTypeDescription", SortingOrder.ASCENDING); homePageSortingValues.put("applicationId", SortingOrder.ASCENDING); homePageSortingValues .put("applicationEmaNumber", SortingOrder.UNSORTED); homePageSortingValues .put("piVersionImportDate", SortingOrder.ASCENDING); homePageSortingValues.put("piVersionId", SortingOrder.ASCENDING); homePageSorting = new Sorting(homePageSortingValues); // Filtering HashMap<String, String> homePageFilteringValues = new HashMap<String, String>(); homePageFilteringValues.put("productName", ""); homePageFilteringValues.put("productAtcCode", ""); homePageFilteringValues.put("productEmaNumber", ""); homePageFilteringValues.put("applicationTypeId", ""); homePageFilteringValues.put("applicationEmaNumber", ""); homePageFilteringValues.put("piVersionImportDate", ""); homePageFiltering = new Filtering(homePageFilteringValues); } /** * @return the applicantProductListFiltering */ public Filtering getApplicantProductListFiltering() { return applicantProductListFiltering; } /** * @param applicantProductListFiltering * the applicantProductListFiltering to set */ public void setApplicantProductListFiltering( Filtering applicantProductListFiltering) { this.applicantProductListFiltering = applicantProductListFiltering; } /** * @return the applicantProductListSorting */ public Sorting getApplicantProductListSorting() { return applicantProductListSorting; } /** * @param applicantProductListSorting * the applicantProductListSorting to set */ public void setApplicantProductListSorting( Sorting applicantProductListSorting) { this.applicantProductListSorting = applicantProductListSorting; } /** * @return the homePageSorting */ public Sorting getHomePageSorting() { return homePageSorting; } /** * @param homePageSorting * the homePageSorting to set */ public void setHomePageSorting(Sorting homePageSorting) { this.homePageSorting = homePageSorting; } /** * @return the homePageFiltering */ public Filtering getHomePageFiltering() { return homePageFiltering; } /** * @param homePageFiltering * the homePageFiltering to set */ public void setHomePageFiltering(Filtering homePageFiltering) { this.homePageFiltering = homePageFiltering; } /** * For convenience to view in the Seam Debug page. * * @see java.lang.Object#toString() */ @Override public String toString() { StringBuilder sb = new StringBuilder(""); sb.append("\n\n"); sb.append("applicantProductListSorting"); sb.append(applicantProductListSorting); sb.append("\n\n"); sb.append("applicantProductListFiltering"); sb.append(applicantProductListFiltering); sb.append("\n\n"); sb.append("homePageSorting"); sb.append(homePageSorting); sb.append("\n\n"); sb.append("homePageFiltering"); sb.append(homePageFiltering); return sb.toString(); } } And this is the BaseManagedBean, inheriting the AbstractMutable. import java.io.IOException; import java.io.OutputStream; import java.util.List; import javax.faces.application.FacesMessage; import javax.faces.application.FacesMessage.Severity; import javax.faces.context.FacesContext; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.ArrayUtils; import org.jboss.seam.core.AbstractMutable; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.myproj.common.exceptions.WebException; import com.myproj.common.util.FileUtils; import com.myproj.common.util.StringUtils; import com.myproj.web.messages.Messages; public abstract class BaseManagedBean extends AbstractMutable { private static final Logger logger = LoggerFactory .getLogger(BaseManagedBean.class); private FacesContext facesContext; /** * Set a message to be displayed for a specific component. * * @param resourceBundle * the resource bundle where the message appears. Either base or * id may be used. * @param summaryResourceId * the id of the resource to be used as summary. For the detail * of the element, the element to be used will be the same with * the suffix {@code _detail}. * @param parameters * the parameters, in case the string is parameterizable * @param severity * the severity of the message * @param componentId * the component id for which the message is destined. Note that * an appropriate JSF {@code <h:message for="myComponentId">} tag * is required for the to appear, or alternatively a {@code * <h:messages>} tag. */ protected void setMessage(String resourceBundle, String summaryResourceId, List<Object> parameters, Severity severity, String componentId, Messages messages) { FacesContext context = getFacesContext(); FacesMessage message = messages.getMessage(resourceBundle, summaryResourceId, parameters); if (severity != null) { message.setSeverity(severity); } context.addMessage(componentId, message); } /** * Copies a byte array to the response output stream with the appropriate * MIME type and content disposition. The response output stream is closed * after this method. * * @param response * the HTTP response * @param bytes * the data * @param filename * the suggested file name for the client * @param mimeType * the MIME type; will be overridden if the filename suggests a * different MIME type * @throws IllegalArgumentException * if the data array is <code>null</code>/empty or both filename * and mimeType are <code>null</code>/empty */ protected void printBytesToResponse(HttpServletResponse response, byte[] bytes, String filename, String mimeType) throws WebException, IllegalArgumentException { if (response.isCommitted()) { throw new WebException("HTTP response is already committed"); } if (ArrayUtils.isEmpty(bytes)) { throw new IllegalArgumentException("Data buffer is empty"); } if (StringUtils.isEmpty(filename) && StringUtils.isEmpty(mimeType)) { throw new IllegalArgumentException( "Filename and MIME type are both null/empty"); } // Set content type (mime type) String calculatedMimeType = FileUtils.getMimeType(filename); // not among the known ones String newMimeType = mimeType; if (calculatedMimeType == null) { // given mime type passed if (mimeType == null) { // none available put default mime-type newMimeType = "application/download"; } else { if ("application/octet-stream".equals(mimeType)) { // small modification newMimeType = "application/download"; } } } else { // calculated mime type has precedence over given mime type newMimeType = calculatedMimeType; } response.setContentType(newMimeType); // Set content disposition and other headers String contentDisposition = "attachment;filename=\"" + filename + "\""; response.setHeader("Content-Disposition", contentDisposition); response.setHeader("Expires", "0"); response.setHeader("Cache-Control", "max-age=30"); response.setHeader("Pragma", "public"); // Set content length response.setContentLength(bytes.length); // Write bytes to response OutputStream out = null; try { out = response.getOutputStream(); out.write(bytes); } catch (IOException e) { throw new WebException("Error writing data to HTTP response", e); } finally { try { out.close(); } catch (Exception e) { logger.error("Error closing HTTP stream", e); } } } /** * Retrieve a session-scoped managed bean. * * @param sessionBeanName * the session-scoped managed bean name * @return the session-scoped managed bean */ protected Object getSessionBean(String sessionBeanName) { Object sessionScopedBean = FacesContext.getCurrentInstance() .getExternalContext().getSessionMap().get(sessionBeanName); if (sessionScopedBean == null) { throw new IllegalArgumentException("No such object in Session"); } else { return sessionScopedBean; } } /** * Set a session-scoped managed bean * * @param sessionBeanName * the session-scoped managed bean name * @return the session-scoped managed bean */ protected boolean setSessionBean(String sessionBeanName, Object sessionBean) { Object sessionScopedBean = FacesContext.getCurrentInstance() .getExternalContext().getSessionMap().get(sessionBeanName); if (sessionScopedBean == null) { FacesContext.getCurrentInstance().getExternalContext() .getSessionMap().put(sessionBeanName, sessionBean); } else { throw new IllegalArgumentException( "This session-scoped bean was already initialized"); } return true; } /** * For testing (enables mock of FacesContext) * * @return the faces context */ public FacesContext getFacesContext() { if (facesContext == null) { return FacesContext.getCurrentInstance(); } return facesContext; } /** * For testing (enables mocking of FacesContext). * * @param aFacesContext * a - possibly mock - faces context. */ public void setFacesContext(FacesContext aFacesContext) { this.facesContext = aFacesContext; } }

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  • Memory mapped files and "soft" page faults. Unavoidable?

    - by Robert Oschler
    I have two applications (processes) running under Windows XP that share data via a memory mapped file. Despite all my efforts to eliminate per iteration memory allocations, I still get about 10 soft page faults per data transfer. I've tried every flag there is in CreateFileMapping() and CreateFileView() and it still happens. I'm beginning to wonder if it's just the way memory mapped files work. If anyone there knows the O/S implementation details behind memory mapped files I would appreciate comments on the following theory: If two processes share a memory mapped file and one process writes to it while another reads it, then the O/S marks the pages written to as invalid. When the other process goes to read the memory areas that now belong to invalidated pages, this causes a soft page fault (by design) and the O/S knows to reload the invalidated page. Also, the number of soft page faults is therefore directly proportional to the size of the data write. My experiments seem to bear out the above theory. When I share data I write one contiguous block of data. In other words, the entire shared memory area is overwritten each time. If I make the block bigger the number of soft page faults goes up correspondingly. So, if my theory is true, there is nothing I can do to eliminate the soft page faults short of not using memory mapped files because that is how they work (using soft page faults to maintain page consistency). What is ironic is that I chose to use a memory mapped file instead of a TCP socket connection because I thought it would be more efficient. Note, if the soft page faults are harmless please note that. I've heard that at some point if the number is excessive, the system's performance can be marred. If soft page faults intrinsically are not significantly harmful then if anyone has any guidelines as to what number per second is "excessive" I'd like to hear that. Thanks.

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  • UIWebViewDelegate returns different error message on iPod Touch 2G and 3G

    - by lostInTransit
    Hi I have an app developed using SDK 3.0. My view has a UIWebView whose delegate is the viewcontroller. I want to show an error message when the webview does not load (in case the touch goes out of wifi range or wifi is turned off) I override this method to show an alert - (void)webView:(UIWebView *)wbView didFailLoadWithError:(NSError *)error But this caused an issue when some links were clicked on the webview. The page loaded but if some images from the previous page were not loaded, the method call was triggered. Testing on an iPod Touch 3G, the NSError's userInfo has the localized description as no Internet connection if load fails due to no internet connection. But this only seems to be true for an iPod Touch 3G. 2G shows a different message (I got to know from some beta testers. They aren't very technical so can't tell them to get me the logs or anything.) Can anyone with an iPod Touch 2G tell me the values for the NSError userInfo? Or better still, did anyone else face this issue? How did you resolve it? Thanks.

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  • Load Images in WPF application

    - by LLS
    I am not familiar with WPF, and I just feel quite confusing. I am trying to create a little computer game, and there are elements I want to display dynamically. I use Image class and add the images to a canvas. But I'm not sure whether it's a good practice. I feel that adding controls to canvas seem to be a little wired. And I'm a little concerned about the performance, because I may need many images. The real problem is, I can't load the images from the image files. I see an example in a text book like this (XMAL): <Image Panel.ZIndex="0" Margin="0,0,0,0" Name ="image1"> <Image.Source> <BitmapImage UriSource="Bell.gif" /> </Image.Source> </Image> Where Bell.gif is added into the project. And I tried to copy this in code to create an image. new Image { Source = new BitmapImage(new Uri("Blockade.bmp"))} But I got invalid Uri exception. After some search in the Internet, I found that loading resources dynamically seems to be difficult. Can I load the files added to the project dynamically? If I use absolute path then it's OK. But I can't expect every computer will put the files in the same location. Can I use relative path? I tried new Image { Source = new BitmapImage(new Uri(@"Pictures\Blank Land.bmp", UriKind.Relative)) } But it doesn't work. (The image is blank) Thanks.

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  • How do I cast <T> to varbinary and be still be able to perform a CONVERT on the sql side? Implicatio

    - by Biff MaGriff
    Hello, I'm writing this application that will allow a user to define custom quizzes and then allow another user to respond to the questions. Each question of the quiz has a corresponding datatype. All the responses to all the questions are stored vertically in my [Response] table. I currently use 2 fields to store the response. //Response schema ResponseID int QuizPersonID int QuestionID int ChoiceID int //maps to Choice table, used for drop down lists ChoiceValue varbinary(MAX) //used to store a user entered value I'm using .net 3.5 C# SQL Server 2008. I'm thinking that I would want to store different datatypes in the same field and then in my SQL report proc I would CONVERT to the proper datatype. I'm thinking this is ideal because I only have to check one field. I'm also thinking it might be more trouble than it is worth. I think my other options are to; store the data as strings in the db (yuck), or to have a column for each datatype I might use. So what I would like to know is, how would I format my datatypes in C# so that they can be converted properly in SQL? What is the performance hit for converting in SQL? Should I just make a whole wack of columns for each datatype?

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  • What is more viable to use? Javascript libraries or UI Programming tools?

    - by Haresh Karkar
    What is more viable to use:- Javascript Libraries: YUI, jQuery, ExtJs OR UI Programming tools: GWT, ExtGWT, SmartGWT It has become very difficult to choose between them as they are constantly increasing their capabilities to meet newer requirements. We all know the power of jQuery in UI manipulations. The latest news from Microsoft about jQuery being officially part of .Net developr’s toolkit will definitely make jQuery a preferred choice against other JavaScript libraries [See link: http://weblogs.asp.net/scottgu/archive/2008/09/28/jquery-and-microsoft.aspx]. But on the other hand, GWT is building a framework which could be used on client as well as on the sever side. This is definitely going to make developers’ life easy as it does not require developer to be an expert in browser quirks, XMLHttpRequest, and JavaScript in order to develop high-performance web applications. It includes SDK (Java API libraries, compiler, and development server which allows to write client-side applications in Java and deploy them as JavaScript), Speed Tracer and plug-in for Eclipse. GWT is used by many products like Google Wave and AdWords. So question is still un-answered, what is more viable to use? Any thoughts?

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  • Python: How to execute a SQL file or command

    - by Mestika
    Hi, I have this Python script: import sys import getopt import timeit import random import os import re import ibm_db import time from string import maketrans runs=5 queries=50 file = open("results.txt", "a") for r in range(5): print "Run %s\n" % r os.system("python reads.py -r1 -pquery1.sql -q50 -sespec") file.write('END QUERY READ 01') file.close() os.system("python query_read_02.py") Everything here is working, it is creating the results.txt file, it run the os.system("python reads.py...") file and that file is doing everything it's suppose to, but the problem comes when go and run the query_read_02.py file. In this file, it should execute a SQL command or a SQL file on my database, so I can create an index and see what the performance of that input is, but how do i do it? I create the connection to the database in the reads.py file, but it's hard to create the queries in there because I doesn't keep track of which file it has reached, it just execute commands from what the parameters are. I hope I've explained myself clear enough, otherwise please let me know. I just want to execute a SQL command or file which each query_read_0x.py file. Sincerely Mestika

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  • Uncatchable AccesViolationException

    - by Roy
    Hi all, I'm getting close to desperate.. I am developing a field service application for Windows Mobile 6.1 using C# and quite some p/Invoking. (I think I'm referencing about 50 native functions) On normal circumstances this goes without any problem, but when i start stressing the GC i'm getting a nasty 0xC0000005 error witch seems uncatchable. In my test i'm rapidly closing and opening a dialog form (the form did make use of native functions, but for testing i commented these out) and after a while the Windows Mobile error reporter comes around to tell me that there was an fatal error in my application. My code uses a try-catch around the Application.Run(masterForm); and hooks into the CurrentDomain.UnhandledException event, but the application still crashes. Even when i attach the debugger, visual studio just tells me "The remote connection to the device has been lost" when the exception occurs.. Since I didn't succeed to catch the exception in the managed environment, I tried to make sense out of the Error Reporter log file. But this doesn't make any sense, the only consistent this about the error is the application where it occurs in. The thread where the application occurs in is unknown to me, the module where the error occurs differs from time to time (I've seen my application.exe, WS2.dll, netcfagl3_5.dll and mscoree3_5.dll), even the error code is not always the same. (most of the time it's 0xC0000005, but i've also seen an 0X80000002 error, which is a warning accounting the first byte?) I tried debugging through bugtrap, but strangely enough this crashes with the same error code (0xC0000005). I tried to open the kdmp file with visual studio, but i can't seem to make any sense out of this because it only shows me disassembler code when i step into the error (unless i have the right .pbb files, which i don't). Same goes for WinDbg. To make a long story short: I frankly don't have a single clue where to look for this error, and I'm hoping some bright soul on stackoverflow does. I'm happy to provide some code but at this moment I don't know which piece to provide.. Any help is greatly appreciated!

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  • update variable based upon results from .NET backgroundworker

    - by Bruce
    I've got a C# program that talks to an instrument (spectrum analyzer) over a network. I need to be able to change a large number of parameters in the instrument and read them back into my program. I want to use backgroundworker to do the actual talking to the instrument so that UI performance doesn't suffer. The way this works is - 1) send command to the instrument with new parameter value, 2) read parameter back from the instrument so I can see what actually happened (for example, I try to set the center frequency above the max that the instrument will handle and it tells me what it will actually handle), and 3) update a program variable with the actual value received from the instrument. Because there are quite a few parameters to be updated I'd like to use a generic routine. The part I can't seem to get my brain around is updating the variable in my code with what comes back from the instrument via backgroundworker. If I used a separate RunWorkerCompleted event for each parameter I could hardwire the update directly to the variable. I'd like to come up with a way of using a single routine that's capable of updating any of the variables. All I can come up with is passing a reference number (different for each parameter) and using a switch statement in the RunWorkerCompleted handler to direct the result. There has to be a better way.

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  • SQL Server Search Proper Names Full Text Index vs LIKE + SOUNDEX

    - by Matthew Talbert
    I have a database of names of people that has (currently) 35 million rows. I need to know what is the best method for quickly searching these names. The current system (not designed by me), simply has the first and last name columns indexed and uses "LIKE" queries with the additional option of using SOUNDEX (though I'm not sure this is actually used much). Performance has always been a problem with this system, and so currently the searches are limited to 200 results (which still takes too long to run). So, I have a few questions: Does full text index work well for proper names? If so, what is the best way to query proper names? (CONTAINS, FREETEXT, etc) Is there some other system (like Lucene.net) that would be better? Just for reference, I'm using Fluent NHibernate for data access, so methods that work will with that will be preferred. I'm using SQL Server 2008 currently. EDIT I want to add that I'm very interested in solutions that will deal with things like commonly misspelled names, eg 'smythe', 'smith', as well as first names, eg 'tomas', 'thomas'. Query Plan |--Parallelism(Gather Streams) |--Nested Loops(Inner Join, OUTER REFERENCES:([testdb].[dbo].[Test].[Id], [Expr1004]) OPTIMIZED WITH UNORDERED PREFETCH) |--Hash Match(Inner Join, HASH:([testdb].[dbo].[Test].[Id])=([testdb].[dbo].[Test].[Id])) | |--Bitmap(HASH:([testdb].[dbo].[Test].[Id]), DEFINE:([Bitmap1003])) | | |--Parallelism(Repartition Streams, Hash Partitioning, PARTITION COLUMNS:([testdb].[dbo].[Test].[Id])) | | |--Index Seek(OBJECT:([testdb].[dbo].[Test].[IX_Test_LastName]), SEEK:([testdb].[dbo].[Test].[LastName] >= 'WHITDþ' AND [testdb].[dbo].[Test].[LastName] < 'WHITF'), WHERE:([testdb].[dbo].[Test].[LastName] like 'WHITE%') ORDERED FORWARD) | |--Parallelism(Repartition Streams, Hash Partitioning, PARTITION COLUMNS:([testdb].[dbo].[Test].[Id])) | |--Index Seek(OBJECT:([testdb].[dbo].[Test].[IX_Test_FirstName]), SEEK:([testdb].[dbo].[Test].[FirstName] >= 'THOMARþ' AND [testdb].[dbo].[Test].[FirstName] < 'THOMAT'), WHERE:([testdb].[dbo].[Test].[FirstName] like 'THOMAS%' AND PROBE([Bitmap1003],[testdb].[dbo].[Test].[Id],N'[IN ROW]')) ORDERED FORWARD) |--Clustered Index Seek(OBJECT:([testdb].[dbo].[Test].[PK__TEST__3214EC073B95D2F1]), SEEK:([testdb].[dbo].[Test].[Id]=[testdb].[dbo].[Test].[Id]) LOOKUP ORDERED FORWARD) SQL for above: SELECT * FROM testdb.dbo.Test WHERE LastName LIKE 'WHITE%' AND FirstName LIKE 'THOMAS%' Based on advice from Mitch, I created an index like this: CREATE INDEX IX_Test_Name_DOB ON Test (LastName ASC, FirstName ASC, BirthDate ASC) INCLUDE (and here I list the other columns) My searches are now incredibly fast for my typical search (last, first, and birth date).

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  • ASP.net AppendHeader not working in ASP MVC

    - by Chao
    I'm having problems getting AppendHeader to work properly if I am also using an authorize filter. I'm using an actionfilter for my AJAX actions that applies Expires, Last-Modified, Cache-Control and Pragma (though while testing I have tried including it in the action method itself with no change in results). If I don't have an authorize filter the headers work fine. Once I add the filter the headers I tried to add get stripped. The headers I want to add Response.AppendHeader("Expires", "Sun, 19 Nov 1978 05:00:00 GMT"); Response.AppendHeader("Last-Modified", String.Format("{0:r}", DateTime.Now)); Response.AppendHeader("Cache-Control", "no-store, no-cache, must-revalidate"); Response.AppendHeader("Cache-Control", "post-check=0, pre-check=0"); Response.AppendHeader("Pragma", "no-cache"); An example of the headers from a correct page: Server ASP.NET Development Server/9.0.0.0 Date Mon, 14 Jun 2010 17:22:24 GMT X-AspNet-Version 2.0.50727 X-AspNetMvc-Version 2.0 Pragma no-cache Expires Sun, 19 Nov 1978 05:00:00 GMT Last-Modified Mon, 14 Jun 2010 18:22:24 GMT Cache-Control no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Content-Type text/html; charset=utf-8 Content-Length 352 Connection Close And from an incorrect page: Server ASP.NET Development Server/9.0.0.0 Date Mon, 14 Jun 2010 17:27:34 GMT X-AspNet-Version 2.0.50727 X-AspNetMvc-Version 2.0 Pragma no-cache, no-cache Cache-Control private, s-maxage=0 Content-Type text/html; charset=utf-8 Content-Length 4937 Connection Close

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  • Is there a Standard or Best Practice for Perl Programs, as opposed to Perl Modules?

    - by swestrup
    I've written any number of perl modules in the past, and more than a few stand-alone perl programs, but I've never released a multi-file perl program into the wild before. I have a perl program that is almost at the beta stage and is going to be released open source. It requires a number of data files, as well as some external perl modules -- some I've written myself, and some from CPAN -- that I'll have to bundle with it so as to ensure that someone can just download my program and install it without worrying about hunting for obscure modules. So, it sounds to me like I need to write an installer to copy all the files to standard locations so that a user can easily install everything. The trouble is, I have no idea what the standard practice would be for this. I have found lots of tutorials on perl module standards, but none on perl program standards. Does anyone have any pointers to standard paths, installation proceedures, etc, for perl programs? This is going to be complicated by the fact that the program is multi-platform. I've been testing it in Linux, but its designed to work equally well in Windows.

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  • jquery - radio button not checked on page load, but checked on same function call later

    - by Bill Zimmerman
    Hi, I'm having a strange problem with jquery. When my page loads, I dynamically create some simple radio buttons in a special i've created. However, the default radio button is not checked. It is checked however when the change() event is triggered later, but is never checked the first time. Can someone help? I am certain that the change() event is triggered on the page load, because the rest of the HTML is added dynamically and I can see it. The basic idea is when the page loads, I bind an event handler, and then immediately call it to make sure that the default options are loaded. $(document).ready(function() { $(".options select[name=App]").change(onAppChange); //trigger the change function in the dropdown to populate default options $(".options select[name=App]").change() } Here is the simple onAppChange() function: function onAppChange() { var val = $(this).val(); var app_options = $(this).closest(".options").find(".app_options"); //clear the app_options app_options.empty(); var newOptions = ''; switch(val) { case 'testapp': newOptions='\ <fieldset>\ <legend>TestApp</legend>\ Option 1:\ <label>\ <input type="radio" name="option1" value="value1" checked>\ Value1\ </label>\ \ <label>\ <input type="radio" name="option1" value="value2">\ value2\ </label>\ \ </fieldset>'; break; case 'todo': //for testing newOptions='FOO'; break; } app_options.append(newOptions); } Yes, I am aware that I could use javascript to automatically select a radio button again, but I asked this question because I wanted to understand why this is happening. When using and , there doesn't seem to be any problem. Only with radio buttons. Why does the behavior differ when the same change() event is triggered? What is going on behind the scenes?

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  • How to localize an app on Google App Engine?

    - by Petri Pennanen
    What options are there for localizing an app on Google App Engine? How do you do it using Webapp, Django, web2py or [insert framework here]. 1. Readable URLs and entity key names Readable URLs are good for usability and search engine optimization (Stack Overflow is a good example on how to do it). On Google App Engine, key based queries are recommended for performance reasons. It follows that it is good practice to use the entity key name in the URL, so that the entity can be fetched from the datastore as quickly as possible. Currently I use the function below to create key names: import re import unicodedata def urlify(unicode_string): """Translates latin1 unicode strings to url friendly ASCII. Converts accented latin1 characters to their non-accented ASCII counterparts, converts to lowercase, converts spaces to hyphens and removes all characters that are not alphanumeric ASCII. Arguments unicode_string: Unicode encoded string. Returns String consisting of alphanumeric (ASCII) characters and hyphens. """ str = unicodedata.normalize('NFKD', unicode_string).encode('ASCII', 'ignore') str = re.sub('[^\w\s-]', '', str).strip().lower() return re.sub('[-\s]+', '-', str) This works fine for English and Swedish, however it will fail for non-western scripts and remove letters from some western ones (like Norwegian and Danish with their œ and ø). Can anyone suggest a method that works with more languages? 2. Translating templates Does Django internationalization and localization work on Google App Engine? Are there any extra steps that must be performed? Is it possible to use Django i18n and l10n for Django templates while using Webapp? The Jinja2 template language provides integration with Babel. How well does this work, in your experience? What options are avilable for your chosen template language? 3. Translated datastore content When serving content from (or storing it to) the datastore: Is there a better way than getting the *accept_language* parameter from the HTTP request and matching this with a language property that you have set with each entity?

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  • VMWare steals IP addresses [closed]

    - by Ishan Amin
    I'm having a peculiar problem, that I think I have narrowed down to VMware. For the past one year, every once in a while we lose internet connection and not all users (about 10 users) go down at the same time, its usually one-by-one. First someone will call me and say "Internet is down" and then we would go reset the router and modem and switch and it would be working again for a while, then go down again without any pattern or replicatable sequence. We'd go repeat the steps again to get everyone in the office running again. We called our Internet Service Provider and they constantly say, We see your modem and we see your router and from thier end everything is OK. we replaced our router and switch and modem, twice! Last friday, it dawned upon me, that everytime we turn on a VMware machine, this sequence of taking everyone down starts, which also explains the message that my users get for "IP Conflict Found" So we do alot of VMware testing and lo and behold, it takes my Internet down. My Yahoo and Gtalk would continue working but www is down when the VMware machines are started. I do use bridged networking to all the VMware machines, but I dont know what else to set it at. now, sorry for this long rambling but anyone have any clue on how to stop this? thanks IA

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  • Access SSAS cube from across domains without direct database connection

    - by SuperKing
    Hello, I'm working with SQL Server Analysis Services for the first time and have the dilemma of working on a project in which users must be able to access SSAS Cubes (via a custom web dashboard) that live across different servers and domains, but without having access to the other server's SSAS database connection strings. So Organization A and Organization B will have their own cubes on their own servers, but Organization A users must be able to view Organization B's cubes, and Organization B users must be able to view Organization A's cubes, but neither organization should have access to the connection string. I've read about allowing HTTP access to the SSAS server and cube from the link below, but that requires setting up users for authentication or allowing anonymous access to one organization's server for users of another organization, and I'm not sure this would be acceptable for this situation, or if this is the preferred way to do this. Is performance acceptable here? http://technet.microsoft.com/en-us/library/cc917711.aspx I also wonder if perhaps it makes sense to run a nightly/weekly process that accesses the other organization's SSAS database via a web service or something, and pull that data into a database on the organization's server, and then rebuild the cube. Then that cube would be queried without having to go and connect to the other organization server when viewing the cube. Has anyone else attempted to accomplish something similar? Is HTTP access the standard way to go for this? Or any other possible options? Thanks, and please let me know if you need more info, still unclear on how some of this works.

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  • Using both chunked transfer encoding and gzip

    - by RadiantHeart
    I recently started using gzip on my site and it worked like charm on all browsers except Opera which gives an error saying it could not decompress the content due to damaged data. From what I can gather from testing and googling it might be a problem with using both gzip and chunked transfer encoding. The fact that there is no error when requesting small files like css-files also points in that direction. Is this a known issue or is there something else that I havent thought about? Someone also mentioned that it could have something to do with sending a Content-Length header. Here is a simplified version of the most relevant part of my code: $contents = ob_get_contents(); ob_end_clean(); header('Content-Encoding: '.$encoding); print("\x1f\x8b\x08\x00\x00\x00\x00\x00"); $size = strlen($contents); $contents = gzcompress($contents, 9); $contents = substr($contents, 0, $size); print($contents); exit();

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  • Seeking reporting or templating tool to generate large formatted PDF reports from dataset

    - by Mr. Tacos
    Say I have some data in MySQL or a big ole CSV file. I also have a report. It's a PDF, call it 100 pages long. I need to generate variations on this PDF for slices of the data. More specific example: I have a CSV file with each StackOverflow user in a row and each column contains various statistics about that user. I have a report called "Your StackOverflow Performance". Its got lots of text, always the same, but each section contains something like: "You Vs. The Average StackOverflow Poster on this metric". I want a table that appears there that has the average data, which is the same in every run of the PDF, in one column. In the second column, I want your data, which is different for each PDF/row in the CSV file/user of StackOverflow. I'm pretty sure people use things like Crystal for this? Is there something in MS SQL Server that's good for this? An open source template language? I'm not even really sure if what I need is called a 'reporting' tool (since I don't really need to do any crunching, the data in this case is being crunched by a series of scripts and SPSS, I don't need bands and subbands and so on) or 'templating'. Is there even such a thing as templating PDFs? Natch, I'd be fine with something that generates output easily scriptable to PDF, like eps, but not something like HTML. The report formatting is fussy and done and externally determined and handed down from on high. It's print-oriented, not webby. Thanks in advance.

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  • General N-Tier Architecture Question

    - by whatispunk
    In an N-Tier app you're supposed to have a business logic layer and a data access layer. Is it bad to simply have two assemblies: BusinessLogicLayer.dll and DataAccessLayer.dll to handle all this logic? How do you actually represent these layers. It seems silly, the way I've seen it, to have a BusinessLogic class library containing classes like: CustomerBusinessLogic.cs, OrderBusinessLogic.cs, etc. each calling their appropriately named cousin in the DataAccessLayer class library, i.e. CustomerDataAccess.cs, OrderDataAccess.cs. I want to create a web app using MVP and it doesn't seem so cut and dry as this. There are lots of opinions about where the business logic is supposed to be put in MVP and I'm not sure I've found a really great answer yet. I want this project to be easily testable, and I am trying to adhere to TDD methodologies as best I can. I intend to use MSTest and Rhino Mocks for testing. I was thinking of something like the following for my architecture: I'd use LINQ-To-SQL to talk to the database. WCF services to define data contract interfaces for the business logic layer. Then use MVP with ASP.NET Forms for the UI/BLL. Now, this isn't the start of this project, most of the LINQ stuff is already done, so its stuck. The WCF service would replace the existing DataAccessLayer assembly and the UI/BLL would replace the BusinessLogicLayer assembly etc. This sort of makes sense in my head, but its getting really late. Anyone that's traveled down this path have any guidance? Good links? Warnings? Thanks!

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  • Debugging strategy to find the cause of bad_alloc

    - by SalamiArmi
    I have a fairly serious bug in my program - occasional calls to new() throw a bad_alloc. From the documentation I can find on bad_alloc, it seems to be thrown for these reasons: When the computer runs out of memory (which definitely isn't happening, I have 4GB of RAM, program throws bad_alloc when using less than 5MB (checked in taskmanager) with nothing serious running in the background). If the memory becomes too fragmented to allocate new blocks (which, again, is unlikely - the largest sized block I ever allocate would be about 1KB, and that doesn't get done more than 100 times before the crash occurs). Based on these descriptions, I don't really have anywhere in which a bad_alloc could be thrown. However, the application I am running runs more than one thread, which could possibly be contributing to the problem. By testing all of the objects on a single thread, everything seems to be working smoothly. The only other thing that I can think of that is going on here could be some kind of race-condition caused by calling new() in more than one place at the same time, but I've tried adding mutexes to prevent that behaviour to no effect. Because the program is several hundred lines and I have no idea where the problem actually lies, I'm not sure of what, if any, code snippets to post. Instead, I was wondering if there were any tools that will help me test for this kind of thing, or if there are any general strategies that can help me with this problem. I'm using Microsoft Visual Studio 2008, with Poco for threading.

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  • decimal.TryParse() drops leading "1"

    - by Martin Harris
    Short and sweet version: On one machine out of around a hundred test machines decimal.TryParse() is converting "1.01" to 0.01 Okay, this is going to sound crazy but bare with me... We have a client applications that communicates with a webservice through JSON, and that service returns a decimal value as a string so we store it as a string in our model object: [DataMember(Name = "value")] public string Value { get; set; } When we display that value on screen it is formatted to a specific number of decimal places. So the process we use is string - decimal then decimal - string. The application is currently undergoing final testing and is running on more than 100 machines, where this all works fine. However on one machine if the decimal value has a leading '1' then it is replaced by a zero. I added simple logging to the code so it looks like this: Log("Original string value: {0}", value); decimal val; if (decimal.TryParse(value, out val)) { Log("Parsed decimal value: {0}", val); string output = val.ToString(format, CultureInfo.InvariantCulture.NumberFormat); Log("Formatted string value: {0}", output); return output; } On my machine - any every other client machine - the logfile output is: Original string value: 1.010000 Parsed decimal value: 1.010000 Formatted string value: 1.01 On the defective machine the output is: Original string value: 1.010000 Parsed decimal value: 0.010000 Formatted string value: 0.01 So it would appear that the decimal.TryParse method is at fault. Things we've tried: Uninstalling and reinstalling the client application Uninstalling and reinstalling .net 3.5 sp1 Comparing the defective machine's regional settings for numbers (using English (United Kingdom)) to those of a working machine - no differences. Has anyone seen anything like this or has any suggestions? I'm quickly running out of ideas... While I was typing this some more info came in: Passing a string value of "10000" to Convert.ToInt32() returns 0, so that also seems to drop the leading 1.

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  • ajax-based login fails: IE6 and IE7 ajax calls delete session data (session_id however is kept)

    - by mateipavel
    This question comes after two days of testing and debugging, right after the shock I had seeing that none of the websites i build using ajax-based login work in IE<8 The most simplified scenario si this: 1. mypage.php : session_start(); $_SESSION['mytest'] = 'x'; <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"> </script> <script type="text/javascript"> function loadit() { $.post('http://www.mysite.com/myajax.php', {action: 'test'}, function(result){alert(result);}, 'html'); } </script> <a href="javascript:void(0);" onclick="loadit(); return false;">test link</a> 2. myajax.php session_start(); print_r($_SESSION); print session_id(); When I click the "test link", the ajax call is made and the result is alert()-ed: IE6: weird bullet-character (&bull;) IE7: Array( ) <session_id> IE8/FF (Expected behaviour): Array( [mytest] => 'x' ) <session_id> I would really appreciate some pointers regarding: 1. why this happens 2. how to fix it Thank you.

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  • Apache Not Accepting a Path in My Home Folder

    - by Promather
    I have trying to set up an Apache site to use a folder in my home folder without any success. I exactly followed the steps in this page: https://help.ubuntu.com/community/ApacheMySQLPHP yet I did not succeed; I keep getting error 403, which says that the server doesn't have permission to access the requested page. I searched forums and many suggested changing the permission of the folder. I went straight away and set the permission to 777, but that didn't solve the problem. I made another search and somebody gave me a clue, which is that it could be because my home folder is encrypted. I believe this could be the problem, but: What is the relation between encryption and Apache? I suppose Apache server is requesting the file from the system, rather than trying to access the file bytes! Is there anyway to solve this problem? I don't want to move the folder to /var/www because I am using this Apache for testing, so I want whatever change I make to be immediately reflected, rather than having to copy files which is error prone.

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  • semi dynamic cdn

    - by dwi kristianto
    i'm developing couple of websites using php (directory script, etc.) and wordpress as cms. i need to improve its performance, by using cdn for static files (css, js, images). the problem is, css and javascript files are generated on the fly. i did that due to yahoo and some expert advice to combine the files into one file. also changing basic color of css files. for the time being, i use couple of small vps but still its not fast enough. i already contact maxcdn and the support guy said that they dont have such kind of services. what i need is: a cdn that will serve the request from user/visitor and there's no file in local disk, the cdn will redirect/fetch it from another domain/server. in vps, it could be done easily using combination of .htaccess and php, but NOT in the cdn. most of cdn only support purely static files. is there any such cdn that will server semi-dynamic files?

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  • Using singleton instead of a global static instance

    - by Farstucker
    I ran into a problem today and a friend recommended I use a global static instance or more elegantly a singleton pattern. I spent a few hours reading about singletons but a few things still escape me. Background: What Im trying to accomplish is creating an instance of an API and use this one instance in all my classes (as opposed to making a new connection, etc). There seems to be about 100 ways of creating a singleton but with some help from yoda I found some thread safe examples. ..so given the following code: public sealed class Singleton { public static Singleton Instance { get; private set; } private Singleton() { APIClass api = new APIClass(); //Can this be done? } static Singleton() { Instance = new Singleton(); } } How/Where would you instantiate the this new class and how should it be called from a separate class? EDIT: I realize the Singleton class can be called with something like Singleton obj1 = Singleton.Instance(); but would I be able to access the methods within the APIs Class (ie. obj1.Start)? (not that I need to, just asking) EDIT #2: I might have been a bit premature in checking the answer but I do have one small thing that is still causing me problems. The API is launching just fine, unfortunately Im able to launch two instances? New Code public sealed class SingletonAPI { public static SingletonAPI Instance { get; private set; } private SingletonAPI() {} static SingletonAPI() { Instance = new SingletonAPI(); } // API method: public void Start() { API myAPI = new API();} } but if I try to do something like this... SingletonAPI api = SingletonAPI.Instance; api.Start(); SingletonAPI api2 = SingletonAPI.Instance; // This was just for testing. api2.Start(); I get an error saying that I cannot start more than one instance.

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