/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.invocation.jrmp.server;
import java.rmi.MarshalledObject;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.InstanceNotFoundException;
import javax.management.ReflectionException;
import org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxyHA;
import org.jboss.invocation.Invocation;
import org.jboss.invocation.Invoker;
import org.jboss.invocation.InvokerHA;
import org.jboss.invocation.MarshalledInvocation;
import org.jboss.system.Registry;
import org.jboss.ha.framework.interfaces.HARMIResponse;
import org.jboss.ha.framework.server.HATarget;
import org.jboss.ha.framework.interfaces.LoadBalancePolicy;
import org.jboss.ha.framework.interfaces.GenericClusteringException;
import java.util.ArrayList;
import java.util.HashMap;
/**
* The JRMPInvokerHA is an HA-RMI implementation that can generate Invocations from RMI/JRMP
* into the JMX base
*
* @author <a href="mailto:bill@burkecentral.com>Bill Burke</a>
* @author <a href="mailto:sacha.labourey@cogito-info.ch">Sacha Labourey</a>.
* @author Scott.Stark@jboss.org
* @author <a href="mailto:galder.zamarreno@jboss.com">Galder Zamarreno</a>
* @version $Revision: 81001 $
*/
public class JRMPInvokerHA
extends JRMPInvoker
implements InvokerHA
{
/** @since v4.2.3 */
private static final long serialVersionUID = -7657305823982668529L;
protected HashMap beanMap = new HashMap();
protected ObjectName serviceName;
/**
* Explicit no-args constructor.
*/
public JRMPInvokerHA()
{
super();
}
// JRMPInvoker.createService() does the right thing
protected void startService() throws Exception
{
loadCustomSocketFactories();
if (log.isDebugEnabled())
{
log.debug("RMI Port='" + (rmiPort == ANONYMOUS_PORT ?
"Anonymous" : Integer.toString(rmiPort)+"'"));
log.debug("Client SocketFactory='" + (clientSocketFactory == null ?
"Default" : clientSocketFactory.toString()+"'"));
log.debug("Server SocketFactory='" + (serverSocketFactory == null ?
"Default" : serverSocketFactory.toString()+"'"));
log.debug("Server SocketAddr='" + (serverAddress == null ?
"Default" : serverAddress+"'"));
log.debug("SecurityDomain='" + (sslDomain == null ?
"None" : sslDomain+"'"));
}
exportCI();
Registry.bind(getServiceName(), this);
}
protected void stopService() throws Exception
{
unexportCI();
}
// JRMPInvoker.destroyService() does the right thing
public void registerBean(ObjectName beanName, HATarget target) throws Exception
{
Integer hash = new Integer(beanName.hashCode());
log.debug("registerBean: "+beanName);
if (beanMap.containsKey(hash))
{
// FIXME [oleg] In theory this is possible!
log.debug("Trying to register target " + target + " using an existing hashCode. Already registered: " + hash + "=" + beanMap.get(hash));
throw new IllegalStateException("Trying to register target using an existing hashCode.");
}
beanMap.put(hash, target);
}
public Invoker createProxy(ObjectName beanName, LoadBalancePolicy policy,
String proxyFamilyName) throws Exception
{
Integer hash = new Integer(beanName.hashCode());
HATarget target = (HATarget) beanMap.get(hash);
if (target == null)
{
throw new IllegalStateException("The bean hashCode not found");
}
String familyName = proxyFamilyName;
if (familyName == null)
familyName= target.getAssociatedPartition().getPartitionName() + "/" + beanName;
return createProxy(target.getReplicants(), policy, familyName, target.getCurrentViewId ());
}
public void unregisterBean(ObjectName beanName) throws Exception
{
Integer hash = new Integer(beanName.hashCode());
beanMap.remove(hash);
}
/**
* Invoke a Remote interface method.
*/
public Object invoke(Invocation invocation)
throws Exception
{
ClassLoader oldCl = Thread.currentThread().getContextClassLoader();
try
{
// Deserialize the transaction if it is there
invocation.setTransaction(importTPC(((MarshalledInvocation) invocation).getTransactionPropagationContext()));
// Extract the ObjectName, the rest is still marshalled
ObjectName mbean = (ObjectName) Registry.lookup(invocation.getObjectName());
long clientViewId = ((Long)invocation.getValue("CLUSTER_VIEW_ID")).longValue();
HATarget target = (HATarget)beanMap.get(invocation.getObjectName());
if (target == null)
{
// We could throw IllegalStateException but we have a race condition that could occur:
// when we undeploy a bean, the cluster takes some time to converge
// and to recalculate a new viewId and list of replicant for each HATarget.
// Consequently, a client could own an up-to-date list of the replicants
// (before the cluster has converged) and try to perform an invocation
// on this node where the HATarget no more exist, thus receiving a
// wrong exception and no failover is performed with an IllegalStateException
//
throw new GenericClusteringException(GenericClusteringException.COMPLETED_NO,
"target is not/no more registered on this node");
}
if (!target.invocationsAllowed ())
throw new GenericClusteringException(GenericClusteringException.COMPLETED_NO,
"invocations are currently not allowed on this target");
// The cl on the thread should be set in another interceptor
Object rtn = support.getServer().invoke(mbean,
"invoke",
new Object[] { invocation },
Invocation.INVOKE_SIGNATURE);
HARMIResponse rsp = new HARMIResponse();
if (clientViewId != target.getCurrentViewId())
{
rsp.newReplicants = new ArrayList(target.getReplicants());
rsp.currentViewId = target.getCurrentViewId();
}
rsp.response = rtn;
return new MarshalledObject(rsp);
}
catch (InstanceNotFoundException e)
{
throw new GenericClusteringException(GenericClusteringException.COMPLETED_NO, e);
}
catch (ReflectionException e)
{
throw new GenericClusteringException(GenericClusteringException.COMPLETED_NO, e);
}
catch (Exception e)
{
org.jboss.mx.util.JMXExceptionDecoder.rethrow(e);
// the compiler does not know an exception is thrown by the above
throw new org.jboss.util.UnreachableStatementException();
}
finally
{
Thread.currentThread().setContextClassLoader(oldCl);
}
}
public ObjectName getServiceName()
{
return (serviceName == null ? support.getServiceName() : serviceName);
}
public void setServiceName(ObjectName serviceName)
{
this.serviceName = serviceName;
}
@Override
public ObjectName preRegister(MBeanServer server, ObjectName name) throws Exception
{
ObjectName result = super.preRegister(server, name);
if (!result.equals(getServiceName()))
throw new IllegalStateException("JMX registration (" + result +
") differs from our configured service name (" +
getServiceName() +")");
return result;
}
protected Invoker createProxy(ArrayList targets, LoadBalancePolicy policy,
String proxyFamilyName, long viewId)
{
return new JRMPInvokerProxyHA(targets, policy, proxyFamilyName, viewId);
}
}