[EJB 3.0] - create() throws NullPointerException
by paras.java
Hi,
I am using Jboss 4.0.3, i have developed one simplee ejb application. it is successfully deployed. But when i run the application it throws null pointer exception. Please see the code, the exception is thrown at the line marked in red.
/*
* SessionTestServlet.java
*
*/
package test.session;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;
public class SessionTestServlet extends HttpServlet {
MyTestSessionHome testSessionBean;
public void init(ServletConfig config) throws ServletException{
//Look up home interface
try {
InitialContext ctx = new InitialContext();
Object objref = ctx.lookup("ejb/test/MyTestSessionBean");
testSessionBean = (MyTestSessionHome)PortableRemoteObject.narrow(objref, MyTestSessionHome.class);
} catch (Exception NamingException) {
NamingException.printStackTrace();
}
}
public void service(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
PrintWriter out;
response.setContentType("text/html");
String title = "EJB Example";
out = response.getWriter();
out.println("");
out.println("");
out.println("Hello World Servlet!");
out.println("");
out.println("");
out.println("<p align=\"center\"><font size=\"4\" color=\"#000080\">Servlet Calling Session Bean");
try{
MyTestSession beanRemote;
System.out.println("Before create");
beanRemote = testSessionBean.create();
System.out.println("After create");
out.println("<p align=\"center\"> Message from Session Bean is: " + beanRemote.SayHi() + "");
beanRemote.remove();
}catch(Exception CreateException){
CreateException.printStackTrace();
}
out.println("<p align=\"center\"><a href=\"javascript:history.back()\">Go to Home");
out.println("");
out.println("");
out.close();
}
public void destroy() {
System.out.println("Destroy");
}
}
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19 years, 3 months
[JBoss Seam] - javax.naming.NamingException: Context is read only
by JeyaLouis
I am getting the following error. i dont know how to solve it. i need help
ERROR org.jboss.kernel.plugins.dependency.AbstractKernelController Error installing to Instantiated: name=TransactionManager state=Described
javax.naming.NamingException: Context is read only
at org.apache.naming.NamingContext.checkWritable(NamingContext.java:902)
at org.apache.naming.NamingContext.bind(NamingContext.java:830)
at org.apache.naming.NamingContext.rebind(NamingContext.java:207)
at org.apache.naming.NamingContext.rebind(NamingContext.java:222)
at org.apache.naming.SelectorContext.rebind(SelectorContext.java:206)
at javax.naming.InitialContext.rebind(InitialContext.java:367)
at org.jboss.util.naming.NonSerializableFactory.rebind(NonSerializableFactory.java:180)
at org.jboss.seam.microcontainer.TransactionManagerFactory.getTransactionManager(TransactionManagerFactory.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:55)
at org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:107)
at org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66)
at org.jboss.kernel.plugins.dependency.KernelControllerContextActions.dispatchJoinPoint(KernelControllerContextActions.java:100)
at org.jboss.kernel.plugins.dependency.KernelControllerContextActions$InstantiateAction.installAction(KernelControllerContextActions.java:383)
at org.jboss.kernel.plugins.dependency.KernelControllerContextActions$KernelControllerContextAction.install(KernelControllerContextActions.java:175)
at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:226)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:593)
at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:346)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:438)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:379)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:225)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:151)
at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deployBean(AbstractKernelDeployer.java:291)
at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deployBeans(AbstractKernelDeployer.java:261)
at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deploy(AbstractKernelDeployer.java:117)
at org.jboss.kernel.plugins.deployment.BasicKernelDeployer.deploy(BasicKernelDeployer.java:64)
at org.jboss.kernel.plugins.deployment.xml.BasicXMLDeployer.deploy(BasicXMLDeployer.java:77)
at org.jboss.kernel.plugins.deployment.xml.BasicXMLDeployer.deploy(BasicXMLDeployer.java:146)
at org.jboss.kernel.plugins.bootstrap.standalone.StandaloneBootstrap.deploy(StandaloneBootstrap.java:101)
at org.jboss.kernel.plugins.bootstrap.standalone.StandaloneBootstrap.bootstrap(StandaloneBootstrap.java:81)
at org.jboss.kernel.plugins.bootstrap.AbstractBootstrap.run(AbstractBootstrap.java:89)
at org.jboss.kernel.plugins.bootstrap.standalone.StandaloneBootstrap.main(StandaloneBootstrap.java:54)
at org.jboss.seam.core.Microcontainer.startup(Microcontainer.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:102)
at org.jboss.seam.Component.callComponentMethod(Component.java:1791)
at org.jboss.seam.Component.callCreateMethod(Component.java:1739)
at org.jboss.seam.Component.newInstance(Component.java:1728)
at org.jboss.seam.contexts.Lifecycle.startup(Lifecycle.java:152)
at org.jboss.seam.contexts.Lifecycle.startup(Lifecycle.java:145)
at org.jboss.seam.contexts.Lifecycle.endInitialization(Lifecycle.java:126)
at org.jboss.seam.init.Initialization.init(Initialization.java:430)
at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:33)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3763)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4211)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:608)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:535)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:470)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
[2007-01-11 09:53:21,968] ERROR org.jboss.kernel.plugins.dependency.AbstractKernelController Error installing to Instantiated: name=TransactionManager state=Described
javax.naming.NamingException: Context is read only
at org.apache.naming.NamingContext.checkWritable(NamingContext.java:902)
at org.apache.naming.NamingContext.bind(NamingContext.java:830)
at org.apache.naming.NamingContext.rebind(NamingContext.java:207)
at org.apache.naming.NamingContext.rebind(NamingContext.java:222)
at org.apache.naming.SelectorContext.rebind(SelectorContext.java:206)
at javax.naming.InitialContext.rebind(InitialContext.java:367)
at org.jboss.util.naming.NonSerializableFactory.rebind(NonSerializableFactory.java:180)
at org.jboss.seam.microcontainer.TransactionManagerFactory.getTransactionManager(TransactionManagerFactory.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:55)
at org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:107)
at org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66)
at org.jboss.kernel.plugins.dependency.KernelControllerContextActions.dispatchJoinPoint(KernelControllerContextActions.java:100)
at org.jboss.kernel.plugins.dependency.KernelControllerContextActions$InstantiateAction.installAction(KernelControllerContextActions.java:383)
at org.jboss.kernel.plugins.dependency.KernelControllerContextActions$KernelControllerContextAction.install(KernelControllerContextActions.java:175)
at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:226)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:593)
at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:346)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:438)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:379)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:225)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:151)
at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deployBean(AbstractKernelDeployer.java:291)
at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deployBeans(AbstractKernelDeployer.java:261)
at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.deploy(AbstractKernelDeployer.java:117)
at org.jboss.kernel.plugins.deployment.BasicKernelDeployer.deploy(BasicKernelDeployer.java:64)
at org.jboss.kernel.plugins.deployment.xml.BasicXMLDeployer.deploy(BasicXMLDeployer.java:77)
at org.jboss.kernel.plugins.deployment.xml.BasicXMLDeployer.deploy(BasicXMLDeployer.java:146)
at org.jboss.kernel.plugins.bootstrap.standalone.StandaloneBootstrap.deploy(StandaloneBootstrap.java:101)
at org.jboss.kernel.plugins.bootstrap.standalone.StandaloneBootstrap.bootstrap(StandaloneBootstrap.java:81)
at org.jboss.kernel.plugins.bootstrap.AbstractBootstrap.run(AbstractBootstrap.java:89)
at org.jboss.kernel.plugins.bootstrap.standalone.StandaloneBootstrap.main(StandaloneBootstrap.java:54)
at org.jboss.seam.core.Microcontainer.startup(Microcontainer.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:102)
at org.jboss.seam.Component.callComponentMethod(Component.java:1791)
at org.jboss.seam.Component.callCreateMethod(Component.java:1739)
at org.jboss.seam.Component.newInstance(Component.java:1728)
at org.jboss.seam.contexts.Lifecycle.startup(Lifecycle.java:152)
at org.jboss.seam.contexts.Lifecycle.startup(Lifecycle.java:145)
at org.jboss.seam.contexts.Lifecycle.endInitialization(Lifecycle.java:126)
at org.jboss.seam.init.Initialization.init(Initialization.java:430)
at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:33)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3763)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4211)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:608)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:535)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:470)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
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19 years, 3 months
[Installation, Configuration & Deployment] - Re: how to config one database for serveral datasources?
by jali
"kaobe" wrote : Hi,
|
| either you define n *-ds.xml files, each defining one database connection, or you use one -ds.xml file that defines the n connections to the database. Inside the datasources tag you can define n datasources.
|
| Peter
thanks for your reply.
this is my mysql-ds.xml in the folder of the default deploy.
but i don't know how to config standardjbosscmp-jdbc.xml file because in this file there is only one default property "datasource". how to set three databases.
standardjbosscmp-jdbc.xml:
.....
java:/A
<datasource-mapping>mySQL</datasource-mapping>
......
mysql-ds.xml:
<local-tx-datasource>
<jndi-name>A</jndi-name> <connection-url>jdbc:mysql://localhost:3306/A</connection-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>root</user-name>
</local-tx-datasource>
<local-tx-datasource>
<jndi-name>B</jndi-name>
<connection-url>jdbc:mysql://localhost:3306/B</connection-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>root</user-name>
</local-tx-datasource>
<local-tx-datasource>
<jndi-name>C</jndi-name>
<connection-url>jdbc:mysql://localhost:3306/C</connection-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>root</user-name>
</local-tx-datasource>
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19 years, 3 months