/*
* JBoss, Home of Professional Open Source
* Copyright 2007, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt 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.ejb3.deployers;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import javax.management.InstanceNotFoundException;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.MBeanOperationInfo;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import org.jboss.beans.metadata.plugins.AbstractBeanMetaData;
import org.jboss.beans.metadata.plugins.AbstractConstructorMetaData;
import org.jboss.beans.metadata.plugins.AbstractDemandMetaData;
import org.jboss.beans.metadata.plugins.AbstractValueMetaData;
import org.jboss.beans.metadata.spi.BeanMetaDataFactory;
import org.jboss.beans.metadata.spi.DemandMetaData;
import org.jboss.beans.metadata.spi.SupplyMetaData;
import org.jboss.ejb3.DependencyPolicy;
import org.jboss.ejb3.DeploymentUnit;
import org.jboss.ejb3.KernelAbstraction;
import org.jboss.ejb3.MCDependencyPolicy;
import org.jboss.kernel.Kernel;
import org.jboss.kernel.plugins.deployment.AbstractKernelDeployment;
import org.jboss.kernel.spi.deployment.KernelDeployment;
import org.jboss.kernel.spi.registry.KernelRegistryEntry;
import org.jboss.logging.Logger;
/**
* The JBossAS implementation of the ejb3 KernelAbstraction integration api
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @author Scott.Stark@jboss.org
* @version $Revision: 85945 $
*/
public class JBossASKernel
implements KernelAbstraction
{
private static Logger log = Logger.getLogger(JBossASKernel.class);
private MBeanServer mbeanServer;
private Kernel kernel;
public JBossASKernel(Kernel kernel)
{
this(kernel, null);
}
public JBossASKernel(Kernel kernel, MBeanServer mbeanServer)
{
this.kernel = kernel;
this.mbeanServer = mbeanServer;
}
public MBeanServer getMbeanServer()
{
return mbeanServer;
}
public void setMbeanServer(MBeanServer mbeanServer)
{
this.mbeanServer = mbeanServer;
}
public void install(String name, DependencyPolicy dependencies,
DeploymentUnit unit, Object service)
{
// Look for the kernel deployment
KernelDeployment deployment = null;
if(unit != null)
{
deployment = (KernelDeployment) unit.getAttachment(KernelDeployment.class.getName());
if(deployment == null)
{
AbstractKernelDeployment akd = new AbstractKernelDeployment();
akd.setBeanFactories(new ArrayList<BeanMetaDataFactory>());
deployment = akd;
String kdname = unit.getShortName();
deployment.setName(kdname);
unit.addAttachment(KernelDeployment.class.getName(), deployment);
log.info("Created KernelDeployment for: "+unit.getShortName());
}
}
// Create the metadata for the bean to install
AbstractBeanMetaData bean = new AbstractBeanMetaData(name, service.getClass().getName());
bean.setConstructor(new AlreadyInstantiated(service));
MCDependencyPolicy policy = (MCDependencyPolicy) dependencies;
bean.setDepends(policy.getDependencies());
bean.setDemands(policy.getDemands());
bean.setSupplies(policy.getSupplies());
log.info("installing bean: " + name);
log.info(" with dependencies:");
for (Object obj : policy.getDependencies())
{
Object msgObject = obj;
if (obj instanceof AbstractDemandMetaData)
{
msgObject = ((AbstractDemandMetaData)obj).getDemand();
}
log.info("\t" + msgObject);
}
log.info(" and demands:");
for(DemandMetaData dmd : policy.getDemands())
{
log.info("\t" + dmd.getDemand());
}
log.info(" and supplies:");
for(SupplyMetaData smd : policy.getSupplies())
{
log.info("\t" + smd.getSupply());
}
if(unit != null)
{
// Just add the mc bean metadata to the unit
deployment.getBeanFactories().add(bean);
log.info("Added bean("+name+") to KernelDeployment of: "+unit.getShortName());
}
else
{
// Install directly into the kernel
try
{
try
{
kernel.getController().uninstall(name);
}
catch (IllegalStateException e){}
log.info("Installing bean("+name+") into kernel");
kernel.getController().install(bean);
}
catch (Throwable throwable)
{
throw new RuntimeException(throwable);
}
}
}
public void installMBean(ObjectName on, DependencyPolicy dependencies,
Object service)
{
if(mbeanServer == null)
throw new RuntimeException("No MBeanServer has been injected");
try
{
mbeanServer.registerMBean(service, on);
install(on.getCanonicalName(), dependencies, null, service);
// EJBTHREE-606: emulate the ServiceController calls
MBeanInfo info = mbeanServer.getMBeanInfo(on); // redundant call for speed
invokeOptionalMethod(on, info, "create");
invokeOptionalMethod(on, info, "start");
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public void uninstall(String name)
{
}
public Object getAttribute(ObjectName objectName, String attribute) throws Exception
{
String name = objectName.getCanonicalName();
KernelRegistryEntry entry = kernel.getRegistry().getEntry(name);
if (entry != null)
{
Object target = entry.getTarget();
Field field = target.getClass().getField(attribute);
return field.get(target);
}
return null;
}
public Set getMBeans(ObjectName query) throws Exception
{
Object target = kernel.getRegistry().getEntry(query);
Set set = new HashSet();
set.add(target);
return set;
}
public void uninstallMBean(ObjectName on)
{
try
{
// EJBTHREE-606: emulate the ServiceController calls
MBeanInfo info = mbeanServer.getMBeanInfo(on); // redundant call for speed
try
{
invokeOptionalMethod(on, info, "stop");
}
catch(Exception e)
{
log.warn("stop on " + on + " failed", e);
}
try
{
invokeOptionalMethod(on, info, "destroy");
}
catch(Exception e)
{
log.warn("destroy on " + on + " failed", e);
}
mbeanServer.unregisterMBean(on);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
public Object invoke(ObjectName objectName, String operationName, Object[] params, String[] signature) throws Exception
{
String name = objectName.getCanonicalName();
KernelRegistryEntry entry = kernel.getRegistry().getEntry(name);
if (entry != null)
{
Object target = entry.getTarget();
Class[] types = new Class[signature.length];
for (int i = 0; i < signature.length; ++i)
{
types[i] = Thread.currentThread().getContextClassLoader().loadClass(signature[i]);
}
Method method = target.getClass().getMethod(operationName, types);
return method.invoke(target, params);
}
return null;
}
private boolean hasOperation(MBeanInfo info, String operationName)
{
for(MBeanOperationInfo operationInfo : info.getOperations())
{
if(operationInfo.getName().equals(operationName) == false)
continue;
// void return type
if(operationInfo.getReturnType().equals("void") == false)
continue;
// no parameters
if(operationInfo.getSignature().length != 0)
continue;
return true;
}
return false;
}
private void invokeOptionalMethod(ObjectName on, MBeanInfo info, String operationName)
throws InstanceNotFoundException, MBeanException, ReflectionException
{
Object params[] = { };
String signature[] = { };
if(hasOperation(info, operationName))
mbeanServer.invoke(on, operationName, params, signature);
}
public static class AlreadyInstantiated extends AbstractConstructorMetaData
{
private static final long serialVersionUID = 1L;
private Object bean;
public class Factory
{
public Object create()
{
return bean;
}
}
public AlreadyInstantiated(Object bean)
{
this.bean = bean;
this.setFactory(new AbstractValueMetaData(new Factory()));
this.setFactoryClass(Factory.class.getName());
this.setFactoryMethod("create");
}
}
}