java/testing/org/apache/derbyTesting/system/sttest/tools/MemCheck.java

/*
 * 
 * Derby - Class org.apache.derbyTesting.system.sttest.MemCheck
 * 
 * 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.derbyTesting.system.sttest.tools;

import java.util.Date;

public class MemCheck extends Thread {
	int delay = 200000;
	
	public boolean stopNow = false;
	
	public MemCheck() {
	}
	
	public MemCheck(int num) {
		delay = num;
	}
	
	public void run() {
		while (stopNow == false) {
			try {
				showmem();
				sleep(delay);
			} catch (java.lang.InterruptedException ie) {
				System.out.println("memcheck: unexpected error in sleep");
			}
		}
	}
	
	public static void showmem() {
		Runtime rt = null;
		Date d = null;
		rt = Runtime.getRuntime();
		d = new Date();
		System.out.println("total memory: " + rt.totalMemory() + " free: "
				+ rt.freeMemory() + " " + d.toString());
	}
	
	public static void main(String argv[]) {
		System.out.println("MemCheck starting");
		MemCheck mc = new MemCheck();
		mc.run();
	}
}