/**
* 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.cxf.management.counters;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.management.JMException;
import javax.management.ObjectName;
import org.apache.cxf.Bus;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.management.InstrumentationManager;
import org.apache.cxf.management.interceptor.ResponseTimeMessageInInterceptor;
import org.apache.cxf.management.interceptor.ResponseTimeMessageInvokerInterceptor;
import org.apache.cxf.management.interceptor.ResponseTimeMessageOutInterceptor;
/* Counters are created and managed by CounterRepository
* If a counter which is queried form the counterRepository is not exist,
* the CounterRepository will create a counter and expose it to the JMX
* Because we can get the instance of the counter object,
* it is not need to qurey the counter object from JMX
* */
public class CounterRepository {
private static final Logger LOG = LogUtils.getL7dLogger(CounterRepository.class);
private Map<ObjectName, Counter> counters;
private Bus bus;
private Lock counterCreationLock = new ReentrantLock();
public CounterRepository() {
counters = new ConcurrentHashMap<ObjectName, Counter>();
}
public void setBus(Bus b) {
bus = b;
if (bus != null) {
registerInterceptorsToBus();
}
}
public Bus getBus() {
return bus;
}
public Map<ObjectName, Counter> getCounters() {
return counters;
}
void registerInterceptorsToBus() {
ResponseTimeMessageInInterceptor in = new ResponseTimeMessageInInterceptor();
ResponseTimeMessageInvokerInterceptor invoker = new ResponseTimeMessageInvokerInterceptor();
ResponseTimeMessageOutInterceptor out = new ResponseTimeMessageOutInterceptor();
bus.getInInterceptors().add(in);
bus.getInInterceptors().add(invoker);
bus.getOutInterceptors().add(out);
bus.getOutFaultInterceptors().add(out);
bus.setExtension(this, CounterRepository.class);
//create CounterRepositroyMoniter to writer the counter log
//if the service is stopped or removed, the counters should remove itself
}
public void increaseCounter(ObjectName on, MessageHandlingTimeRecorder mhtr) {
Counter counter = getCounter(on);
if (null == counter) {
counterCreationLock.lock();
try {
// check if the counter has been created during the locked time
counter = getCounter(on);
if (counter == null) {
counter = createCounter(on);
counters.put(on, counter);
}
} finally {
counterCreationLock.unlock();
}
}
counter.increase(mhtr);
if (LOG.isLoggable(Level.FINE)) {
LOG.fine("Increase counter " + on + " with " + mhtr);
}
}
//find a counter
public Counter getCounter(ObjectName on) {
return counters.get(on);
}
public Counter createCounter(ObjectName on) {
Counter counter = null;
counter = new ResponseTimeCounter(on);
InstrumentationManager im = bus.getExtension(InstrumentationManager.class);
if (null != im) {
try {
im.register(counter);
} catch (JMException e) {
LOG.log(Level.WARNING, "INSTRUMENTATION_REGISTER_FAULT_MSG",
new Object[]{on, e});
}
}
return counter;
}
}