[jboss-user] [JBoss Microcontainer] - Custom ClassLoader

Irfan Basha [https://community.jboss.org/people/irbash] created the discussion "Custom ClassLoader" To view the discussion, visit: https://community.jboss.org/message/804773#804773 -------------------------------------------------------------- Hi All, I am trying to create a custom classloader which I can use to load few classes in my war (may be complete war in future). I found this article which explains how a custom classloader can be created: (Custom ClassLoader (classloader-beans.xml)) http://java.dzone.com/articles/a-look-inside-jboss-microconta-0 http://java.dzone.com/articles/a-look-inside-jboss-microconta-0 I have few clarifications in this: 1) Where should I put the content of classloader-beans.xml ? (I have currently put it in jboss-beans.xml and placed it in WEB-INF) 2) Correct me if am wrong: The bean CB2 will be loaded using the customClassLoader... right ? This is how my jboss-beans.xml looks like: +<deployment xmlns="urn:jboss:bean-deployer:2.0">+ +          <classloader>+ +                    <inject bean="custom-classloader:0.0.0" />+ +          </classloader>+ +          <classloader name="custom-classloader" xmlns="urn:jboss:classloader:1.0"+ +                    export-all="NON_EMPTY" import-all="true" />+ +          <bean name="CustomCL" class="com.beans.CustomClassLoader">+ +                    <constructor>+ +                              <parameter>+ +                                        <inject bean="custom-classloader:0.0.0" />+ +                              </parameter>+ +                    </constructor>+ +          </bean>+ +          <bean name="CB1" class="com.Sample">+ +          <classloader>+ +                    <inject bean="CustomCL" />+ +          </classloader>+ +</bean>+ +</deployment>+ And I have the class CustomeClassLoader which just extends ClassLoader: public class CustomClassLoader extends ClassLoader {    private Pattern pattern;    public CustomClassLoader(ClassLoader parent)    {       super(parent);    }    public Class<?> loadClass(String name) throws ClassNotFoundException    {       if (pattern == null || pattern.matcher(name).matches())          return super.loadClass(name);       else          throw new ClassNotFoundException("Name '" + name + "' doesn't match pattern: " + pattern);    }    public void setPattern(String regexp)    {       pattern = Pattern.compile(regexp);    } } and when I start JBoss I get this following error: 08:28:51,677 ERROR [AbstractKernelController] Error installing to PreInstall: na me=CustomCL state=Real java.lang.ClassNotFoundException: com.beans.CustomClassLoader         at java.net.URLClassLoader$1.run(Unknown Source)         at java.net.URLClassLoader$1.run(Unknown Source)         at java.security.AccessController.doPrivileged(Native Method)         at java.net.URLClassLoader.findClass(Unknown Source)         at java.lang.ClassLoader.loadClass(ClassLoader.java:428)         at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)         at java.lang.ClassLoader.loadClass(ClassLoader.java:360)         at java.lang.Class.forName0(Native Method)         at java.lang.Class.forName(Unknown Source)         at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseCl assLoaderDomain.java:304)         at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseCl assLoaderDomain.java:1172)         at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(Ba seClassLoader.java:1264)         at org.jboss.classloader.spi.base.BaseClassLoader.doLoadClass(BaseClassL oader.java:549)         at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoa der.java:497)         at java.lang.ClassLoader.loadClass(ClassLoader.java:360)         at java.lang.Class.forName0(Native Method)         at java.lang.Class.forName(Unknown Source)         at org.jboss.reflect.plugins.introspection.IntrospectionTypeInfoFactoryI mpl.resolveComplexTypeInfo(IntrospectionTypeInfoFactoryImpl.java:419)         at org.jboss.reflect.plugins.introspection.IntrospectionTypeInfoFactoryI mpl.getTypeInfo(IntrospectionTypeInfoFactoryImpl.java:388)         at org.jboss.reflect.plugins.introspection.IntrospectionTypeInfoFactory. getTypeInfo(IntrospectionTypeInfoFactory.java:54)         at org.jboss.classadapter.plugins.BasicClassAdapterFactory.getClassAdapt er(BasicClassAdapterFactory.java:61)         at org.jboss.config.plugins.AbstractConfiguration.getBeanInfo(AbstractCo nfiguration.java:86)         at org.jboss.kernel.plugins.config.AbstractKernelConfig.getBeanInfo(Abst ractKernelConfig.java:80)         at org.jboss.kernel.plugins.config.AbstractKernelConfigurator.getBeanInf o(AbstractKernelConfigurator.java:77)         at org.jboss.kernel.plugins.config.AbstractKernelConfigurator.getBeanInf o(AbstractKernelConfigurator.java:96)         at org.jboss.kernel.plugins.dependency.PreInstallAction.installActionInt ernal(PreInstallAction.java:90)         at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction (InstallsAwareAction.java:54)         at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction (InstallsAwareAction.java:42)         at org.jboss.dependency.plugins.action.SimpleControllerContextAction.sim pleInstallAction(SimpleControllerContextAction.java:62)         at org.jboss.dependency.plugins.action.AccessControllerContextAction.ins tall(AccessControllerContextAction.java:71)         at org.jboss.dependency.plugins.AbstractControllerContextActions.install (AbstractControllerContextActions.java:51)         at org.jboss.dependency.plugins.AbstractControllerContext.install(Abstra ctControllerContext.java:348)         at org.jboss.dependency.plugins.AbstractController.install(AbstractContr oller.java:1631)         at org.jboss.dependency.plugins.AbstractController.incrementState(Abstra ctController.java:934)         at org.jboss.dependency.plugins.AbstractController.resolveContexts(Abstr actController.java:1082)         at org.jboss.dependency.plugins.AbstractController.resolveContexts(Abstr actController.java:984)         at org.jboss.dependency.plugins.AbstractController.install(AbstractContr oller.java:774)         at org.jboss.dependency.plugins.AbstractController.install(AbstractContr oller.java:540)         at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(B eanMetaDataDeployer.java:121)         at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(B eanMetaDataDeployer.java:51)         at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.i nternalDeploy(AbstractSimpleRealDeployer.java:62)         at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy( AbstractRealDeployer.java:50)         at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(Deployer Wrapper.java:171)         at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(Deployer sImpl.java:1439)         at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFi rst(DeployersImpl.java:1157)         at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFi rst(DeployersImpl.java:1178)         at org.jboss.deployers.plugins.deployers.DeployersImpl.install(Deployers Impl.java:1098)         at org.jboss.dependency.plugins.AbstractControllerContext.install(Abstra ctControllerContext.java:348)         at org.jboss.dependency.plugins.AbstractController.install(AbstractContr oller.java:1631)         at org.jboss.dependency.plugins.AbstractController.incrementState(Abstra ctController.java:934)         at org.jboss.dependency.plugins.AbstractController.resolveContexts(Abstr actController.java:1082)         at org.jboss.dependency.plugins.AbstractController.resolveContexts(Abstr actController.java:984)         at org.jboss.dependency.plugins.AbstractController.change(AbstractContro ller.java:822)         at org.jboss.dependency.plugins.AbstractController.change(AbstractContro ller.java:553)         at org.jboss.deployers.plugins.deployers.DeployersImpl.process(Deployers Impl.java:781)         at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeploye rImpl.java:702)         at org.jboss.system.server.profileservice.repository.MainDeployerAdapter .process(MainDeployerAdapter.java:117)         at org.jboss.system.server.profileservice.repository.ProfileDeployAction .install(ProfileDeployAction.java:70)         at org.jboss.system.server.profileservice.repository.AbstractProfileActi on.install(AbstractProfileAction.java:53)         at org.jboss.system.server.profileservice.repository.AbstractProfileServ ice.install(AbstractProfileService.java:361)         at org.jboss.dependency.plugins.AbstractControllerContext.install(Abstra ctControllerContext.java:348)         at org.jboss.dependency.plugins.AbstractController.install(AbstractContr oller.java:1631)         at org.jboss.dependency.plugins.AbstractController.incrementState(Abstra ctController.java:934)         at org.jboss.dependency.plugins.AbstractController.resolveContexts(Abstr actController.java:1082)         at org.jboss.dependency.plugins.AbstractController.resolveContexts(Abstr actController.java:984)         at org.jboss.dependency.plugins.AbstractController.change(AbstractContro ller.java:822)         at org.jboss.dependency.plugins.AbstractController.change(AbstractContro ller.java:553)         at org.jboss.system.server.profileservice.repository.AbstractProfileServ ice.activateProfile(AbstractProfileService.java:306)         at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start( ProfileServiceBootstrap.java:271)         at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java: 461)         at org.jboss.Main.boot(Main.java:221)         at org.jboss.Main$1.run(Main.java:556) DEPLOYMENTS MISSING DEPENDENCIES:   Deployment "CB1" is missing the following dependencies:     Dependency "CustomCL" (should be in state "PreInstall", but is actually in s tate "**ERROR**") DEPLOYMENTS IN ERROR:   Deployment "CustomCL" is in error due to the following reason(s): java.lang.Cl assNotFoundException: com.beans.CustomClassLoader, **ERROR** Can anyone help in solving this problem. Thanks in advance, Irfan -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/804773#804773] Start a new discussion in JBoss Microcontainer at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]