/********************************************************************************
* 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.
*
* Performance timer factory.
*
* Author: Alan F. Gates (gates@)
* $Header:$
*/
package org.apache.pig.tools.timer;
import java.io.PrintStream;
import java.lang.String;
import java.util.HashMap;
import java.util.Collection;
import java.util.Iterator;
import org.apache.pig.tools.timer.PerformanceTimer;
public class PerformanceTimerFactory
{
/**
* Get the timer factory.
* @return timer factory.
*/
public static PerformanceTimerFactory getPerfTimerFactory()
{
if (self == null) {
self = new PerformanceTimerFactory();
}
return self;
}
/**
* Get a performance timer. If the indicated timer does not exist, it will be
* created. If a timer of that name already exists, it will be returned.
* @param name Name of the timer to return.
* @return the timer.
*/
public PerformanceTimer getTimer(String name)
{
PerformanceTimer timer = mTimers.get(name);
if (timer == null) {
timer = new PerformanceTimer(name);
mTimers.put(name, timer);
}
return timer;
}
/**
* Call print on all of the known performance timers.
* @param out output stream to dump to
*/
public void dumpTimers(PrintStream out)
{
Collection<PerformanceTimer> c = mTimers.values();
Iterator<PerformanceTimer> i = c.iterator();
while (i.hasNext()) {
i.next().print(out);
}
}
public void dumpTimers()
{
dumpTimers(System.out);
}
private static PerformanceTimerFactory self = null;
private PerformanceTimerFactory()
{
mTimers = new HashMap<String, PerformanceTimer>();
}
HashMap<String, PerformanceTimer> mTimers;
}