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  • What stack would you use for a new web Java project if you started today?

    - by Joelio
    If you were to start a brand new java project today with the following requirements: high scale (20k + users) you want to use something that is fairly mature (not changing dramatically) & wont be dead technology in 3 years you want something very productive (no server restarts in dev, save the code and its automatically compiled and deployed), productivity and time to market are key. some amount of ajax on front end no scripting language, jruby, groovy, php etc , has to be java has to support i8n What stack would you use & Why? (when I say stack, I mean, everything soup to nuts, so app server, mvc framework, bean framework, ORM framework, javascript framework etc...)

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  • how to ignore the event onchange of a4j:support when clicking button

    - by bakkujp
    Hi All, I have a textbox like below <h:inputText value="#{bean.strQuantite}"> <a4j:support actionListener="#{tabacListCommandeAltadisDetailBean.actionListenerQuantity}" event="onchange" /> </h:inputText> I input some value into the textbox above and don't click outside the textbox yet. After that, I click a other button, then click event of button is not trigger. Instead of this, the event onchange of the inputtext above is trigger. I want to when clicking the button, the click event is trigged before. Can anyone help me to solve this problem ?

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  • Unbelievable: Cannot cast from class X to its super class

    - by Phuong Nguyen de ManCity fan
    I'm encountering a very weird problem with Spring (3.0.1.RELEASE), TestNG (5.11) and Maven Surefire (2.5). I have a test class that extends a Spring helper class for testNG so that test context can be loaded from an xml file (that contains some bean definitions). My project was imported into eclipse using m2eclipse (using Import Maven Project) The class run fine in Eclipse TestNG runner. However, it throws this exception with Maven Surefire Caused by: java.lang.ClassCastException: com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl cannot be cast to javax.xml.parsers.DocumentBuilderFactory at javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:123) at org.springframework.beans.factory.xml.DefaultDocumentLoader.createDocumentBuilderFactory(DefaultDocumentLoader.java:89) at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:70) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:388) I have eliminated all involved dependencies in my pom so that the two classes com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl and javax.xml.parsers.DocumentBuilderFactory are coming from JRE only (the rt.jar). So, it looks so unbelievable to me. I wonder if there is any mechanism in loading class that can explain for this behavior? Thanks.

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  • Spring App error: java.lang.NoClassDefFoundError: org/springframework/security/core/SpringSecurityCoreVersion

    - by Shades88
    I am writing a simple spring mvc login form example. I am getting below error in netbeans 05-Jun-2014 02:11:51.055 SEVERE [http-nio-8084-exec-1] org.apache.catalina.core.StandardContext.listenerStart Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from ServletContext resource [/WEB-INF/SpringSecurity.xml]; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.security.config.SecurityNamespaceHandler]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/security/core/SpringSecurityCoreVersion at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:413) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:335) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:216) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:540) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:454) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4738) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5158) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:726) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:702) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:697) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:579) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:455) at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1554) at sun.reflect.GeneratedMethodAccessor53.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1428) at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:885) at org.apache.catalina.manager.ManagerServlet.doGet(ManagerServlet.java:343) at javax.servlet.http.HttpServlet.service(HttpServlet.java:618) at javax.servlet.http.HttpServlet.service(HttpServlet.java:725) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:301) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:74) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1015) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:652) at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1575) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1533) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.security.config.SecurityNamespaceHandler]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/security/core/SpringSecurityCoreVersion at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:164) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:105) at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.resolve(DefaultNamespaceHandlerResolver.java:130) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1419) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1414) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:187) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:141) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:110) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:508) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:391) ... 60 more Caused by: java.lang.NoClassDefFoundError: org/springframework/security/core/SpringSecurityCoreVersion at org.springframework.security.config.SecurityNamespaceHandler.<init>(SecurityNamespaceHandler.java:65) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148) ... 69 more Caused by: java.lang.ClassNotFoundException: org.springframework.security.core.SpringSecurityCoreVersion at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1284) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1132) ... 75 more I am using spring 3.2.7. It was not having spring security jar. So I got it downloaded using maven. It's version is 3.2.4. What is this error? There's no error in code. What must have gone wrong? For last 3 hours I have been trying to run a simple example, but totally hammered by this error. Please help

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  • Are JSF 2.x ViewScoped Beans Thread Safe?

    - by Mark
    I've been googling for a couple hours on this issue to no eval. WELD docs and the CDI spec are pretty clear regarding thread safety of the scopes provided. For example: Application Scope - not safe Session Scope - not safe Request Scope - safe, always bound to a single thread Conversation Scope - safe (due to the WELD proxy serializing access from multiple request threads) I can't find anything on the View Scope defined by JSF 2.x. It is in roughly the same bucket as the Conversation Scope in that it is very possible for multiple requests to hit the scope concurrently despite it being bound to a single view / user. What I don't know is if the JSF implementation serializes access to the bean from multiple requests. Anyone have knowledge of the spec or of the Morraja/MyFaces implementations that could clear this up?

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  • unable to inject seam cache provider

    - by Joshua
    Env: Seam 2.2, ehcache-core 2.1.0 I tried injecting the CacheProvider using the following call in my bean scoped for session @In CacheProvider cacheProvider; WEB-INF\components.xml contains the following line to enable the cache provider <cache:eh-cache-provider/> The above configuration seems to return a null value for the cache provider Using the cache provider like this CacheProvider cacheProvider = CacheProvider.instance(); throws the following warning 15:29:27,586 WARN [CacheManager] Creating a new instance of CacheManager using the diskStorePath "C:\DOCUME~1\user5\LOCALS~1\Temp\" which is already used by an existing CacheManager. The source of the configuration was net.sf.ehcache.config.generator.Configuratio nSource$DefaultConfigurationSource@15ed0f9. The diskStore path for this CacheManager will be set to C:\DOCUME~1\user5\LOCALS ~1\Temp\\ehcache_auto_created_1276682367586. To avoid this warning consider using the CacheManager factory methods to create a singleton CacheManager or specifying a separate ehcache configuration (ehcache .xml) for each CacheManager instance. What am I missing here?

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  • JSF - 2 a4j:actionParam in one commandlink bug

    - by Yurish
    Hi! I have such structure in my jsp: <h:commandLink action=#{docbean.save}> <a4j:actionParam value="bill_all" assignTo="#{billdoc.billType}"/> <a4j:actionParam value="bill_document" assignTo="#{docbean.doctype}"/> </h:commandLink> While debugging i saw, that billdoc.billtype and docbean.doctype have the same values: "bill_document". Is it bug? If not, then how can i put value to my managed-bean?

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  • Database connection management in Spring

    - by ria
    Do we have to explicitly manage database resources when using Spring Framework.. liking closing all open connections etc? I have read that Spring relieves developer from such boiler plate coding... This is to answer an error that I am getting in a Spring web app: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: ORA-00020: maximum number of processes (150) exceeded The jdbcTemplate is configured in the xml file and the DAO implementation has reference to this jdbcTemplate bean which is used to query the database.

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  • GlassFish Starting Up Java SE Client - No Initial Context Exception

    - by Marcel
    Hi I have developed a java se client that calls some session beans on a glassfish server. I connect to the bean remote interface like this. context = new InitialContext(); em = (ICrudService) context.lookup("java:global/BackITServer/CrudServiceImpl"); This works fine from inside eclipse (gf-client on build path). When I export my project as a runnable jar and call it on the console with java -jar BackItClient.jar I get a NoInitialContextException. MMMM. I would very much appreciate some help. Thank You Greetings Marcel PS: Do I really have to pack all the jars which gf-client is referencing into my jar?

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  • How to rewrite the URL

    - by Kalpana
    I have a small application built using Seam 2.2, Richfaces 3.3, JBoss 5.1. Most of the page navigation adds the request parameters to the target URL. I would like to hide parameters to be hidden to the customer who is using the application (e.g. I would expect the URL to be something like "http://localhost:8080/books/Book.seam". The parameters (userId, orderId and cmId) are currently mapped to the backend bean via Book.page.xml. How do I prevent the request parameters from showing up in the browser URL, as it also allows the customer to manipulate the URL. We did look at seam URL re-writing feature, it talked about manipulating say the primary key id in a REST format, not sure how to accomplish something more complex like the above use case in a elegant fashion.

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  • Generating a error code per property in Hibernate validator

    - by Mike Q
    Hi all, I am looking at using hibernate validator for a requirement of mine. I want to validate a bean where properties may have multiple validation checks. e.g. class MyValidationBean { @NotNull @Length( min = 5, max = 10 ) private String myProperty; } But if this property fails validation I want a specific error code to be associated with the ConstraintViolation, regardless of whether it failed because of @Required or @Length, although I would like to preserve the error message. class MyValidationBean { @NotNull @Length( min = 5, max = 10 ) @ErrorCode( "1234" ) private String myProperty; } Something like the above would be good but it doesn't have to be structured exactly like that. I can't see a way to do this with hibernate validator. Is it possible? Thanks.

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  • What exactly is a property in Objective C ? What is the difference between a property ans an instance variable?

    - by tek3
    I am very much confused between instance variables and property. I have read number of posts regarding this but still i am not clear about it. I am from JAVA background and what i infer from objective C documentation is that a property is similar to JAVA BEAN CLASS (one having getter and setter of instance varibles). A property can accessed from other classes through its getter and setter methods while an instance variable is private and cannot be accessed from other classes. Am i right in thinking in this direction ?

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  • jsFunction pass data to backingbean

    - by deilig
    I have a javascript that is calling a function addData(param1,param2,param3,param4) which is calling addClip at the end And I need to pass those to a backing bean. <a4j:form> <a4j:jsFunction name="addClip" action="#{backingBean.goGo}"> <a4j:actionparam name="param1" assignTo="#{backingBean.param1}"/> </a4j:jsFunction> </a4j:form> But I can't seem to pass any values to the backingbean. I've even tried setting a static value for the actionparam. But when I try to do a Systemout on the setParam1 method it only prints out null. Have I missed anything important?

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  • Injecting logger, weld

    - by kislo_metal
    Hi. I am trying to replace standard logger initialization by some injection 1-st. I was trying to use weld weld logging in stateless bean/webservices @Stateless @WebService public class EchoSSL { @Inject private Logger log; public EchoSSL() { } public String echo(String msg) { log.debug("Log test"); return "Echoing: " + msg; } } But it not working for me.. i get java.lang.reflect.InvocationTargetException What is missed ? 2-nd than I try this tutorial that is referenced to this - Custom Injections But it also dosen`t help. Q: What is the rule of weld Logger injection in ejb / web services ?

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  • spring 3 mvc requestmapping dynamic param problem

    - by Faisal khan
    I have the following code which works fine with http://localhost:8080/HelloWorldSpring3/forms/helloworld but i want to have url have some thing like this http://localhost:8080/HelloWorldSpring3/forms/helloworld/locname_here/locid_here I found that adding this @RequestMapping("/helloworld/**") will work but when i try to access http://localhost:8080/HelloWorldSpring3/forms/helloworld/locname_here/locid_here it is not found. Web.xml entry as follows <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/forms/*</url-pattern> </servlet-mapping> Mapping bean entry @RequestMapping("/helloworld/**") public ModelAndView helloWord(){ String message = "Hello World, Spring 3.0!"; return new ModelAndView("helloworld", "message",message); }

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  • Server-initiated Rendering: EJB -> FacesContext?

    - by egbokul
    I've already asked this question on the Icefaces forum, but meanwhile I realized that this is a more generic problem. I'd like to update parts of a JSF page when I get a message in my MDB. The problem is, how do I get the FacesContext from the EJB container? In the message processing function FacesContext.getCurrentInstance() returns null. I've also tried to make a JSF managed bean be a MDB, but I couldn't (it seems you can't have both in the same class?). Since I'm a beginner in the JSF world I'm kind of stuck now. Is there a way to make it work? (Glassfish v3 + Netbeans 6.8, JSF2 + Icefaces 2.0 alpha2)

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  • Grails deploy on Tomcat6

    - by Jack
    Hello, while trying to deploy a Grails application into tomcat6 I ran into some problems: I used the grails war command to build up a war, then copied it to var/lib/tomcat6/webapps and tried to restart the container. I had to change default Tomcat policy to skip security exceptions, since I couldn't access environment variable (like grails.env), then tried again but it gives me an exception related to instantiating something, but it's not clear where should I try to fix the error, according to tomcat6 logs the problem is: SEVERE: Exception sending context initialized event to listener instance of class org.codehaus.groovy.grails.web.context.GrailsC$ org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pluginManager' defined in ServletContext$ at java.lang.Thread.run(Thread.java:619) Caused by: org.codehaus.groovy.grails.exceptions.NewInstanceCreationException: Could not create a new instance of class [Hiberna$ ... 1 more Caused by: java.lang.NoClassDefFoundError: org.hibernate.cfg.Environment It seems like it's unable to load org.hibernate.cfg.Environment class. I checked the applicationContext.xml and it refers to grails.xml to search for plugins, in this last file I actually have HibernateGrailsPlugin. Where should I look to find if the plugin is present?

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  • hg access control to central repository

    - by andreas buykx
    We come from a subversion background where we have a QA manager who gives commit rights to the central repository once he has verified that all QC activities have been done. Me and a couple of colleagues are starting to use mercurial, and we want to have a shared repository that would contain our QC-ed changes. Each of the developers hg clones the repository and pushes his changes back to the shared repository. I've read the HG init tutorial and skimmed through the red bean book, but could not find how to control who is allowed to push changes to the shared repository. How would our existing model of QA-manager controlled commits translate to a mercurial 'central' repository?

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  • Sharing beans from contextListener -- dispatcher servlet

    - by Ernest
    Hello! ok, i have another question now. I have a bunch of beans loaded succesfully in applicationContext.xml, which loads from web.xml: contextConfigLocation applicationContext.xml org.springframework.web.context.ContextLoaderListener Here are is the bean defined in applicationContext.xml that i want to share: it loads other beans (DAOs) which are initialized with hibernet. I need to acces catalogFacadeTarget from the dispatcherServlet, declared in web.xml: dispatcher org.springframework.web.servlet.DispatcherServlet 1 <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>*.htm</url-pattern> </servlet-mapping> and configured dispatcher-servlet.xml like this: welcome There! in the property called catalogFacadeImpl. If you need the entire applicationCOntext.xml, web.xml, and dispatcher-servlet.xml please let me know. From what i read, i should be able to share beans if i declared them in the contextConfigLocation configuration file. Thank you very much in advance.

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  • Is dependency injection possible for JSP beans?

    - by kazanaki
    This may be a long shot question.. I am working on an application that is based on JSP/Javascript only (without a Web framework!) Is there a way to have depencency injection for JSP beans? By jsp beans I mean beans defined like this <jsp:useBean id="cart" scope="session" class="session.Carts" /> Is there a way/library/hack to intercept the bean creation so that when "cart" is referenced for the first time, some some of injection takes place? Can I define somewhere a "listener" for JSP beans (like you can do for JSF beans for example)? I am free to do anything I want in the back-end, but I cannot add a web framework in the front-end (Don't ask!)

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  • JSF + PrimeFaces: `update` attribute does not update component

    - by Harry Pham
    Here is my layout <div id="mainPanel"> <div id="padding"> <h:outputText id="text" value="Personal Feed" rendered="#{Profile.renderComment}"/> </div> <div id="right"> <h:form> <p:commandButton value="Update" actionListener="#{bean.toggleComment}" update="text" /> </h:form> </div> </div> When I click the link Update, which suppose to toggle the renderComment boolean on and off, but it does not toggle the display of the text Personal Feed. Now if I put a form around the h:outputText, and instead update the form instead, then it work. Why is that?

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  • Learning Spring MVC For web-projects

    - by John
    I have looked at Spring MVC a few times briefly, and got the basic ideas. However whenever I look closely it seems to require you already know a whole load of 'core Spring'. The book I have for instance has a few hundred pages before it gets onto Spring MVC... which seems a lot to wade through. I'm used to being able to jump in, but there's so much bean-related stuff and XML, it just looks like a mass of data to consume. Does it simplify if you put the time in, or is Spring just a much bigger framework than I thought? is it possible to learn this side of it in isolation?

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  • When to use POJO and When to use SLSB

    - by user83795
    we are using EJB3 in our application. Our design aim is to separate persistence layer from Business Layer. So we have developed XXXbean classes to be used as SLSB and XXXRepository classes to be used as persistence classes. We also have POJO that implement reusable NON business logic(get list of countries etc) and we call then service/helper Classes. We use EJB3 JPA (using Hibernate provider) and Repository classes has all the methods for CRUD operation and the get methods for data access. Currently XXXRepository classes are all POJO and we instantiate these classes directly from the bean XXXClasses or from the service Objects. Should the XXXRepository classes be SLSB ? what would be the benefits and pitfalls of converting them to SLSB?

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  • midlet as EJB webservice client

    - by Kemmal
    hello. i have a midlet that is a client for an ejb web service. i have the following problems, my goal is to make an sms program that sends and receives sms through http. when the midlet accesses the web service, i would like to find a way to later asynchronously push a message to the midlet. how can i do this? can my stateless web service access a stateful session bean to keep states of clients? if there are better approaches to my problem, please help.

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  • JSF 2.0 method invocation with argument from var of dataGrid

    - by little_b
    Hello I use primefaces with facelets and i have a quastion: for example i have dataGrid and i want to call method of bean, that registered in faces-config, to include some dynamic content: <p:dataGrid var="provider" value="#{paymentFormBean.providers}"> <ui:include src="contentFactory.getSpecificForm('some attribute')"/> </p:dataGrid> How could i invoke getSpecificForm method with argument from var of dataGrid? Something like: <p:dataGrid var="provider" value="#{paymentFormBean.providers}"> <ui:include src="contentFactory.getSpecificForm(provider.formName)"/> </p:dataGrid> Could anyone help me? Thank you

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