/*
* 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.aries.jmx.whiteboard;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.IdentityHashMap;
import javax.management.MBeanRegistration;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import org.osgi.framework.ServiceReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class JmxWhiteboardSupport {
static final String PROP_OBJECT_NAME = "jmx.objectname";
/** default log */
private final Logger log = LoggerFactory.getLogger(getClass());
private MBeanServer[] mbeanServers = new MBeanServer[0];
// mapping registered MBean services to their MBeanHolder objects
private final IdentityHashMap<Object, MBeanHolder> mbeans = new IdentityHashMap<Object, MBeanHolder>();
protected synchronized void addMBeanServer(final MBeanServer mbeanServer) {
log.debug("addMBeanServer: Adding MBeanServer {}", mbeanServer);
ArrayList<MBeanServer> serverList = new ArrayList<MBeanServer>(
Arrays.asList(mbeanServers));
serverList.add(mbeanServer);
mbeanServers = serverList.toArray(new MBeanServer[serverList.size()]);
// register all mbeans with the new server
for (MBeanHolder mbean : mbeans.values()) {
mbean.register(mbeanServer);
}
}
protected synchronized void removeMBeanServer(final MBeanServer mbeanServer) {
log.debug("removeMBeanServer: Removing MBeanServer {}", mbeanServer);
// remove all dynamically registered mbeans from the server
for (MBeanHolder mbean : mbeans.values()) {
mbean.unregister(mbeanServer);
}
ArrayList<MBeanServer> serverList = new ArrayList<MBeanServer>(
Arrays.asList(mbeanServers));
serverList.remove(mbeanServer);
mbeanServers = serverList.toArray(new MBeanServer[serverList.size()]);
}
protected synchronized void registerMBean(Object mbean, final ServiceReference props) {
log.debug("registerMBean: Adding MBean {}", mbean);
ObjectName objectName = getObjectName(props);
if (objectName != null || mbean instanceof MBeanRegistration) {
MBeanHolder holder = MBeanHolder.create(mbean, objectName);
if (holder != null) {
MBeanServer[] mbeanServers = this.mbeanServers;
for (MBeanServer mbeanServer : mbeanServers) {
holder.register(mbeanServer);
}
mbeans.put(mbean, holder);
} else {
log.error(
"registerMBean: Cannot register MBean service {} with MBean servers: Not an instanceof DynamicMBean or not MBean spec compliant standard MBean",
mbean);
}
} else {
log.error(
"registerMBean: MBean service {} not registered with valid jmx.objectname propety and not implementing MBeanRegistration interface; not registering with MBean servers",
mbean);
}
}
protected synchronized void unregisterMBean(Object mbean) {
log.debug("unregisterMBean: Removing MBean {}", mbean);
final MBeanHolder holder = mbeans.remove(mbean);
if (holder != null) {
holder.unregister();
}
}
private ObjectName getObjectName(final ServiceReference props) {
Object oName = props.getProperty(PROP_OBJECT_NAME);
if (oName instanceof ObjectName) {
return (ObjectName) oName;
} else if (oName instanceof String) {
try {
return new ObjectName((String) oName);
} catch (MalformedObjectNameException e) {
log.error("getObjectName: Provided ObjectName property "
+ oName + " cannot be used as an ObjectName", e);
}
} else {
log.info(
"getObjectName: Missing {} service property (or wrong type); registering if MBean is MBeanRegistration implementation",
PROP_OBJECT_NAME);
}
return null;
}
}