/*
* 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 com.hp.hpl.jena.sparql.mgt ;
import java.lang.management.ManagementFactory ;
import java.util.HashMap ;
import java.util.Map ;
import javax.management.* ;
import org.apache.jena.atlas.lib.InternalErrorException ;
import org.apache.jena.atlas.logging.Log ;
import org.slf4j.Logger ;
import org.slf4j.LoggerFactory ;
import com.hp.hpl.jena.query.ARQ ;
import com.hp.hpl.jena.sparql.ARQException ;
import com.hp.hpl.jena.sparql.engine.QueryEngineBase ;
/* Old version of the class which did JMX operations.
* See JENA-614
*/
class ARQMgt_X {
// In some environments, JMX does not exist.
static private Logger log = LoggerFactory.getLogger(ARQMgt_X.class) ;
private static boolean initialized = false ;
private static boolean noJMX = false ;
private static Map<ObjectName, Object> mgtObjects = new HashMap<>() ;
private static MBeanServer mbs = null ;
public static synchronized void init() {
if (initialized)
return ;
initialized = true ;
if ( noJMX )
return ;
try {
mbs = ManagementFactory.getPlatformMBeanServer() ;
} catch (Throwable ex) {
Log.debug(ARQMgt_X.class, "Failed to initialize JMX: "+ex.getMessage()) ;
noJMX = true ;
mbs = null ;
}
}
public static void register() {
init() ;
String NS = ARQ.PATH ;
ContextMBean cxtBean = new ContextMBean(ARQ.getContext()) ;
QueryEngineInfo qeInfo = QueryEngineBase.queryEngineInfo ;
// Done in ARQ initialization --
// register(NS+".system:type=SystemInfo", ARQ.systemInfo) ;
register(NS + ".system:type=Context", cxtBean) ;
register(NS + ".system:type=Engine", qeInfo) ;
}
public static void register(String name, Object bean) {
init() ;
if (noJMX)
return ;
ObjectName objName = objectName(name) ;
register(objName, bean) ;
}
public static void unregister(String name) {
init() ;
if (noJMX)
return ;
ObjectName objName = objectName(name) ;
unregister(objName) ;
}
private static void register(ObjectName objName, Object bean) {
try {
// Unregister to avoid classloader problems.
// A previous load of this class will have registered something
// with the object name. Remove it - copes with reloading.
// (Does not cope with multiple loads running in parallel.)
if (mbs.isRegistered(objName)) {
try {
mbs.unregisterMBean(objName) ;
} catch (InstanceNotFoundException ex) {}
}
log.debug("Register MBean: " + objName) ;
mbs.registerMBean(bean, objName) ;
// remember ...
mgtObjects.put(objName, bean) ;
} catch (NotCompliantMBeanException ex) {
log.warn("Failed to register (NotCompliantMBeanException)'" + objName.getCanonicalName() + "': " + ex.getMessage()) ;
throw new ARQException("Failed to register '" + objName.getCanonicalName() + "': " + ex.getMessage(), ex) ;
} catch (InstanceAlreadyExistsException ex) {
log.warn("Failed to register (InstanceAlreadyExistsException)'" + objName.getCanonicalName() + "': " + ex.getMessage()) ;
throw new ARQException("Failed to register '" + objName.getCanonicalName() + "': " + ex.getMessage(), ex) ;
} catch (MBeanRegistrationException ex) {
log.warn("Failed to register (MBeanRegistrationException)'" + objName.getCanonicalName() + "': " + ex.getMessage()) ;
throw new ARQException("Failed to register '" + objName.getCanonicalName() + "': " + ex.getMessage(), ex) ;
}
}
private static void unregister(ObjectName objName) {
log.debug("Unregister MBean: " + objName) ;
if ( ! mgtObjects.containsKey(objName) )
log.warn("MBean not already registered: " + objName) ;
try {
mbs.unregisterMBean(objName) ;
}
catch (InstanceNotFoundException ex) { } // Meh, whatever
catch (MBeanRegistrationException ex) {
throw new InternalErrorException(ex) ;
}
}
private static ObjectName objectName(String name) {
try { return new ObjectName(name) ; }
catch (MalformedObjectNameException ex) {
throw new ARQException("Failed to create name '" + name + "': " + ex.getMessage(), ex) ;
}
}
}