https://answers.axonivy.com/questions/2337/access-ivy-project-classloader-on-jar<p>Hi all</p> <p>I'm using a htmlUserDialog wich JSF and i have a jsf custom tag, i build and put it on webapp folder of server. this is a custom tag that i will use on my xhtml. this tag somehow is a jsf event listener, it listen system event of jsf (ex: PostAddToView, PreRenderView,...)</p> <p>Sometime when i start ivy engine (via Windows services), i got exception:</p> <pre><code>ch.ivyteam.ivy.environment.EnvironmentNotAvailableException: Access to ivy environment outside a process request thread is not possible. Current thread: Thread[http-nio-8082-exec-1,5,main] at ch.ivyteam.ivy.environment.Ivy.getIvy(Ivy.java:574) at ch.ivyteam.ivy.environment.Ivy.getEnvironmentData(Ivy.java:553) at ch.ivyteam.ivy.environment.Ivy.getEnvironmentData(Ivy.java:548) at ch.ivyteam.ivy.environment.Ivy.request(Ivy.java:242) at ch.axonivy.fintech.guiframework.component.GuiEventListenerFactoryServiceProvider.getProjectClassLoader(GuiEventListenerFactoryServiceProvider.java:67) at ch.axonivy.fintech.guiframework.component.GuiEventListenerFactoryServiceProvider.getFactory(GuiEventListenerFactoryServiceProvider.java:32) at ch.axonivy.fintech.guiframework.component.GuiEventListenerComponent.&lt;init&gt;(GuiEventListenerComponent.java:46) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at java.lang.Class.newInstance(Class.java:442) at org.apache.myfaces.application.ApplicationImpl.createComponent(ApplicationImpl.java:1469) at javax.faces.application.ApplicationWrapper.createComponent(ApplicationWrapper.java:129) at org.apache.myfaces.extensions.validator.core.factory.ExtValApplicationWrapper.createComponent(ExtValApplicationWrapper.java:84) at javax.faces.application.ApplicationWrapper.createComponent(ApplicationWrapper.java:129) at org.apache.myfaces.view.facelets.compiler.FaceletsCompilerSupport.loadLibraries(FaceletsCompilerSupport.java:141) at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.loadLibraries(FaceletViewDeclarationLanguage.java:2526) at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.createCompiler(FaceletViewDeclarationLanguage.java:2172) at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.initialize(FaceletViewDeclarationLanguage.java:2464) at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.&lt;init&gt;(FaceletViewDeclarationLanguage.java:309) at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguageStrategy.&lt;init&gt;(FaceletViewDeclarationLanguageStrategy.java:52) at org.apache.myfaces.view.ViewDeclarationLanguageFactoryImpl.initialize(ViewDeclarationLanguageFactoryImpl.java:104) at org.apache.myfaces.view.ViewDeclarationLanguageFactoryImpl.getViewDeclarationLanguage(ViewDeclarationLanguageFactoryImpl.java:73) at org.apache.myfaces.application.ViewHandlerImpl.getViewDeclarationLanguage(ViewHandlerImpl.java:183) at javax.faces.application.ViewHandlerWrapper.getViewDeclarationLanguage(ViewHandlerWrapper.java:133) at org.apache.myfaces.shared.application.DefaultViewHandlerSupport.checkResourceExists(DefaultViewHandlerSupport.java:569) at org.apache.myfaces.shared.application.DefaultViewHandlerSupport.handleSuffixMapping(DefaultViewHandlerSupport.java:507) </code></pre> <p>In my jar file, i need to access to ivy project class loader, so i have this line:</p> <pre><code> ClassLoader cl = Ivy.request().getProject().getProjectClassLoader(); </code></pre> <p>I have a interface in this jar so i need to get class loader to find which class (from ivy project) is implementing my interface (vis ServiceLoader)</p> <p>I guess my jar is started before ivy initialize its environment. So how can i solve it ?</p> <p>P/S: when i try to start some more times, my engine can start but this exception is quite annoying imo</p> <p>Thanks</p>enThu, 29 Dec 2016 14:27:37 -0500https://answers.axonivy.com/questions/2337/access-ivy-project-classloader-on-jar/2340<p><code>Ivy.request()</code> is only available in a http-request. As you probably know. On engine start the context is not set up. </p> <p>Maybe you could initialize your state(s) within the first request. Please keep in mind that the jsf-initialization is NOT done for each project/pmv - just one for the engine.</p> <p>Anyway, it's hard with just the snipped of a Stacktrace to give valuable feedback. Therefore, could you create a demo project?</p> <p>Ps. There are investigations (tech stories) to provide contexts for each pmv-set, see <a href="http://developer.axonivy.com/extend/">here (public)</a> and <a href="https://jira.axonivy.com/confluence/display/IVYTEAM/Improve+ivy+extendability">here (internal)</a>. I think this would help a lot to create custom features for ivy...</p>Flavio SadeghiThu, 29 Dec 2016 14:27:37 -0500https://answers.axonivy.com/questions/2337/access-ivy-project-classloader-on-jar/2340