this is why sharing jars across web applications is generally a bad idea unless the jars are specifically designed to be shared. you are going to run into the same problem with any jar that stores a cache in a static variable, because all of a sudden this cache is shared across multiple applications, some of which might have classes with the same name even though they are actually different.
i would recommend including wicket-spring jars in your war. -igor On Mon, Mar 2, 2009 at 12:25 PM, Alex Parvulescu <alex.parvule...@gmail.com> wrote: > I had no luck with this on the users mail list ( us...@wicket.apache.org ) > maybe here its a better fit for this email > > > Hello, > > I have a problem with the wicket - spring integration in wicket 1.4 rc2 , i > think its similar to https://issues.apache.org/jira/browse/WICKET-1848 > > The use case is like this : > > I have 2 simple applications running in a jetty server. > > To keep things simple , i added the spring and wicket libs to the common > classpath (so the following libs: cglib-nodep-2.1_3.jar, > commons-logging-1.1.jar , log4j-1.2.13.jar , slf4j-api-1.5.0.jar , > slf4j-log4j12-1.5.0.jar , spring-2.5.6.jar , wicket-1.4-rc2.jar , > wicket-ioc-1.4-rc2.jar , wicket-spring-1.4-rc2.jar go into > $JETTY_HOME/lib/ext/extra-libs ) > That helps me keep the size of the wars lower. > > I think the problem is that by using this common classpath , the wicket > applications share -some- context.More to the point , I don't think that > LazyInitProxyFactory is thread safe , or maybe application safe. It appears > that bean ids from one application are visible in another application thats > deployed on the same server. > > As an example : I can define a bean with the id 'simpleService' in the first > application. But when I try to define another bean in the second application > with the same id - still 'simpleService' but a different interface- I get > the following error: > > GET, protocol = HTTP/1.1, requestURL = http://localhost:8080/, contentType = > null, contentLength = -1, contextPath = , pathInfo = null, requestURI = /, > servletPath = /, pathTranslated = null] > 2009-02-24 15:08:04,803 ERROR org.apache.wicket.RequestCycle - Can't > instantiate page using constructor public com.asf.test2.web.Index() > org.apache.wicket.WicketRuntimeException: Can't instantiate page using > constructor public com.asf.test2.web.Index() > at > org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:172) > at > org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:58) > at > org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:299) > at > org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:321) > at > org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:234) > at > org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92) > at > org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1192) > at org.apache.wicket.RequestCycle.step(RequestCycle.java:1271) > at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1370) > at org.apache.wicket.RequestCycle.request(RequestCycle.java:501) > at > org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:455) > at > org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:288) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1115) > at > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:361) > at > org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) > at > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) > at > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417) > at > org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:199) > at > org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) > at > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > at org.mortbay.jetty.Server.handle(Server.java:324) > at > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535) > at > org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:865) > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:538) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) > at > org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) > at > org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522) > Caused by: java.lang.reflect.InvocationTargetException > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:494) > at > org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:153) > ... 28 more > Caused by: java.lang.RuntimeException: error while injecting object [[Page > class = com.asf.test2.web.Index, id = 0, version = 0]] of type > [com.asf.test2.web.Index] > at org.apache.wicket.injection.Injector.inject(Injector.java:118) > at > org.apache.wicket.injection.ConfigurableInjector.inject(ConfigurableInjector.java:39) > at > org.apache.wicket.injection.ComponentInjector.onInstantiation(ComponentInjector.java:52) > at > org.apache.wicket.Application.notifyComponentInstantiationListeners(Application.java:1027) > at org.apache.wicket.Component.<init>(Component.java:911) > at org.apache.wicket.MarkupContainer.<init>(MarkupContainer.java:113) > at org.apache.wicket.MarkupContainer.<init>(MarkupContainer.java:105) > at org.apache.wicket.Page.<init>(Page.java:236) > at org.apache.wicket.markup.html.WebPage.<init>(WebPage.java:185) > at com.asf.test2.web.Index.<init>(Index.java:20) > ... 33 more > Caused by: java.lang.IllegalArgumentException > at > sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:63) > at java.lang.reflect.Field.set(Field.java:656) > at org.apache.wicket.injection.Injector.inject(Injector.java:112) > ... 42 more > > > Another example is that if its indeed the same bean injected - lets say it > comes from a jar in the classpath - i get the same object in both > applications , even though the two don't have anything in common , except > for the bean id ( just for the example's sake, thats what toString() shows: > 'org.apache.wicket.proxy.lazyinitproxyfactory$jdkhand...@1469658' ). > > I don't know if its a bug or not , to me this all looks a bit buggy. I have > a testcase if anyones interested in taking a look at this. > > Also , a very important aspect is that this does not happen when i pack > everyhting in one big war - but the size difference is pretty big - i'm > going from 300KB to 5MB on each war. > > Thanks, > Alex >
