I have a Class which implements Schedulable, it uses Hibernate to check some
tables. It's real simple at this point. The problem however occurs when the
Server starts up it cannot find the Scheduler. The class is in the
scheduler-plugin.jar in the lib directory. Its a standard jar with JBoss
4.0.2.
Here's what I put in the jboss-service.xml
true
com.tables.events.CheckForTablesTask
101
int
10000
-1
Here's the error I'm getting:
00:38:46,718 ERROR [MainDeployer] could not create deployment:
file:/S:/jboss-4.0.2/server/default/conf/jboss-service.xml
org.jboss.deployment.DeploymentException: No ClassLoaders found for:
org.jboss.varia.schedular.Schedular; - nested throwable:
(java.lang.ClassNotFoundException: No ClassLoaders found for:
org.jboss.varia.schedular.Schedular)
at
org.jboss.system.ServiceConfigurator.install(ServiceConfigurator.java:143)
at
org.jboss.system.ServiceController.install(ServiceController.java:202)
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.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
at $Proxy4.install(Unknown Source)
... there more, but i cut it out.
Here's my Scheduled Event Class, for what it's worth:
public class CheckForTablesTask implements Schedulable {
private static Logger logger = null;
private int serverId = 0;
public CheckForTablesTask(int serverId) {
this.serverId = serverId;
}
public void perform(Date date, long param) {
if (logger == null) {
logger = Logger.getLogger(CheckForTablesTask.class);
}
logger.debug("Server ["+serverId+"] checking for new tables");
StringBuffer queryStr = new StringBuffer();
queryStr.append("from Table as t where t.serverId = ");
queryStr.append(serverId);
queryStr.append("and t.topicCreated = 0");
try {
Session session = SessionManager.currentSession();
Iterator itt = session.createQuery(queryStr.toString()).iterate();
Table table;
while(itt.hasNext()){
table = (Table)itt.next();
logger.debug("Server ["+serverId+"] new table, name = "+
table.getName());
// Create topic
// Change Status
table.setTopiccreated(new Byte((byte)1));
table.setStatus(Tablestatus.REGISTERING);
}
session.flush();
} catch (HibernateException he) {
logger.error(CheckForTablesTask.class.getName() + ": server["
+ serverId + "] threw HibernateException : ", he);
} finally {
try {
SessionManager.closeSession();
} catch (HibernateException he) {
// do nothing
}
}
}
}
I have in my jar file, this class, the classes required for Hibernate
distribution and my hibernate classes and mappings. I placed this file in the
lib directory under the server/default/lib directory. The scheduler-plugin.jar
is there as well.
Why doesn't the server see the scheduler-plugin.jar?
Am I placing the mbean definition in the right place, by placing it in the
jboss-service.xml?
Am I doing the right thing by placing the CheckTablesTask, the Hibernate Dist
and my hibernate classes in the server/defalut/lib directory as a jar file?
Thanks,
Michael
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