/**
* 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.geronimo.monitoring.snapshot;
import java.io.File;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Properties;
import java.util.Set;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import javax.naming.Context;
import javax.naming.InitialContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.geronimo.monitoring.MBeanHelper;
import org.apache.geronimo.monitoring.MasterRemoteControlJMX;
import org.apache.geronimo.monitoring.snapshot.SnapshotConfigXMLBuilder;
/**
* Thread that is in charge of executing every x milliseconds. Upon each
* iteration, a snapshot of the server's information is recorded.
*/
public class SnapshotProcessor {
private static Log log = LogFactory.getLog(SnapshotProcessor.class);
/**
* Collects JSR-77 statistics for all mbeans that have been chosen to
* be monitored and stores it in a DB. Will also, archive snapshots
* if they have passed their retention period.
* @param username
* @param password
*/
public static void takeSnapshot(/*String username, String password*/) {
// ensure that there is a 'monitoring' directory
SnapshotConfigXMLBuilder.ensureMonitorDir();
// get any saved mbean names from snapshot-config.xml
ArrayList<String> mbeanNames = SnapshotConfigXMLBuilder.getMBeanNames();
// get a handle on the mrc
MasterRemoteControlJMX mrc = getMRC(/*username, password*/);
// in the case where nothing is present, grab a set of default mbeans
if(mbeanNames.size() <= 0) {
mbeanNames = getDefaultMBeanList(mrc);
}
// turn on all stats in the list
setStatsOn(mbeanNames, mrc);
try {
// take a snapshot
log.info("======SNAPSHOT======");
// instantiate map <mbean name, stats for mbean>
HashMap<String, HashMap<String, Long>> aggregateStats = new HashMap<String, HashMap<String, Long>>();
// for each mbean name in the list, get its stats
for(int i = 0; i < mbeanNames.size(); i++) {
String mbeanName = mbeanNames.get(i);
HashMap<String, Long> stats = (HashMap<String, Long>)mrc.getStats(mbeanName);
aggregateStats.put(mbeanName, stats);
}
// store the data in a DB
(new SnapshotDBHelper()).addSnapshotToDB(aggregateStats);
for(Iterator itt = aggregateStats.keySet().iterator(); itt.hasNext(); ) {
String mbean = (String)itt.next();
HashMap<String, Long> stats = aggregateStats.get(mbean);
log.info(mbean);
for(Iterator it = stats.keySet().iterator(); it.hasNext(); ) {
String key = (String)it.next();
Long value = (Long)stats.get(key);
log.info(key + ": " + value);
}
}
} catch(Exception e) {
log.error(e.getMessage(), e);
}
}
/**
* Turns all statistics on for each mbean in the list.
*
* @param mbeanList
*/
private static void setStatsOn(ArrayList<String> mbeanList, MasterRemoteControlJMX mrc) {
// for each mbean name in the list
for(int i = 0; i < mbeanList.size(); i++) {
// turn the statistics collection on
String methodName = "setStatsOn";
Object[] params = new Object[] { Boolean.TRUE };
String[] signatures = new String[] { "boolean" };
try {
ObjectName objName = new ObjectName(mbeanList.get(i));
mrc.invoke(objName, methodName, params, signatures);
log.info("Stats for " + mbeanList.get(i) + " was turned on.");
} catch (UndeclaredThrowableException e) {
// HACK : this will happen for components that always collect statistics
// and do not have StatsOn method.
} catch(ReflectionException e) {
// HACK : this will happen for components that do not have setStatsOn()
} catch(Exception e) {
log.error(e.getMessage(), e);
}
}
}
/**
* @return A list of all default mbeans; namely, all connector or container mbean names
* Prereq: in order to be a connector or container mbean the name must contain "Connector"/"Container"
* and "Tomcat"/"Jetty" or JVM.
*/
private static ArrayList<String> getDefaultMBeanList(MasterRemoteControlJMX mrc) {
Set<String> mbeans = MBeanHelper.getStatsProvidersMBeans( mrc.getAllMBeanNames() );
ArrayList<String> retval = new ArrayList<String>();
for(Iterator it = mbeans.iterator(); it.hasNext(); ) {
String name = (String)it.next();
if(((name.contains("Connector") || name.contains("Container")) && (name.contains("Jetty") || name.contains("Tomcat")))
|| name.contains("JVM")) {
// this is a connector or JVM, so add to the list
retval.add(name);
// update the snapshot-config.xml to include these
SnapshotConfigXMLBuilder.addMBeanName(name);
}
}
return retval;
}
/**
* @return An instance of a MRC.
*/
public static MasterRemoteControlJMX getMRC(/*String username, String password*/) {
return new MasterRemoteControlJMX();
}
}