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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.server.management;
import javax.management.JMException;
import javax.management.MBeanInfo;
import javax.management.MBeanNotificationInfo;
import javax.management.MalformedObjectNameException;
import javax.management.NotCompliantMBeanException;
import javax.management.ObjectName;
import javax.management.StandardMBean;
import org.apache.log4j.Logger;
import org.apache.qpid.server.registry.ApplicationRegistry;
/**
* Provides implementation of the boilerplate ManagedObject interface. Most managed objects should find it useful
* to extend this class rather than implementing ManagedObject from scratch.
*
*/
public abstract class DefaultManagedObject extends StandardMBean implements ManagedObject
{
private static final Logger LOGGER = Logger.getLogger(DefaultManagedObject.class);
private final Class<?> _managementInterface;
private final String _typeName;
private final MBeanInfo _mbeanInfo;
private ManagedObjectRegistry _registry;
protected DefaultManagedObject(Class<?> managementInterface, String typeName)
throws NotCompliantMBeanException
{
super(managementInterface);
_managementInterface = managementInterface;
_typeName = typeName;
_mbeanInfo = buildMBeanInfo();
}
@Override
public MBeanInfo getMBeanInfo()
{
return _mbeanInfo;
}
public String getType()
{
return _typeName;
}
public Class<?> getManagementInterface()
{
return _managementInterface;
}
public ManagedObject getParentObject()
{
return null;
}
public void register() throws JMException
{
_registry = ApplicationRegistry.getInstance().getManagedObjectRegistry();
_registry.registerObject(this);
}
public void unregister()
{
try
{
if(_registry != null)
{
_registry.unregisterObject(this);
}
}
catch (JMException e)
{
LOGGER.error("Error unregistering managed object: " + this + ": " + e, e);
}
finally
{
_registry = null;
}
}
public String toString()
{
return getObjectInstanceName() + "[" + getType() + "]";
}
/**
* Created the ObjectName as per the JMX Specs
* @return ObjectName
* @throws MalformedObjectNameException
*/
public ObjectName getObjectName() throws MalformedObjectNameException
{
String name = getObjectInstanceName();
StringBuffer objectName = new StringBuffer(ManagedObject.DOMAIN);
objectName.append(":type=");
objectName.append(getHierarchicalType(this));
objectName.append(",");
objectName.append(getHierarchicalName(this));
objectName.append("name=").append(name);
return new ObjectName(objectName.toString());
}
protected ObjectName getObjectNameForSingleInstanceMBean() throws MalformedObjectNameException
{
StringBuffer objectName = new StringBuffer(ManagedObject.DOMAIN);
objectName.append(":type=");
objectName.append(getHierarchicalType(this));
String hierarchyName = getHierarchicalName(this);
if (hierarchyName != null)
{
objectName.append(",");
objectName.append(hierarchyName.substring(0, hierarchyName.lastIndexOf(",")));
}
return new ObjectName(objectName.toString());
}
protected String getHierarchicalType(ManagedObject obj)
{
if (obj.getParentObject() != null)
{
String parentType = getHierarchicalType(obj.getParentObject()).toString();
return parentType + "." + obj.getType();
}
else
return obj.getType();
}
protected String getHierarchicalName(ManagedObject obj)
{
if (obj.getParentObject() != null)
{
String parentName = obj.getParentObject().getType() + "=" +
obj.getParentObject().getObjectInstanceName() + ","+
getHierarchicalName(obj.getParentObject());
return parentName;
}
else
return "";
}
private MBeanInfo buildMBeanInfo() throws NotCompliantMBeanException
{
return new MBeanInfo(this.getClass().getName(),
MBeanIntrospector.getMBeanDescription(this.getClass()),
MBeanIntrospector.getMBeanAttributesInfo(getManagementInterface()),
MBeanIntrospector.getMBeanConstructorsInfo(this.getClass()),
MBeanIntrospector.getMBeanOperationsInfo(getManagementInterface()),
this.getNotificationInfo());
}
public MBeanNotificationInfo[] getNotificationInfo()
{
return null;
}
}
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