/*
* Copyright (c) 2006 Hyperic, Inc.
*
* Licensed 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.hyperic.sigar.cmd;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.ProcMem;
/**
* Watch for changes in program memory usage.
*/
public class MemWatch {
static final int SLEEP_TIME = 1000 * 10;
public static void main(String[] args) throws Exception {
Sigar sigar = new Sigar();
if (args.length != 1) {
throw new Exception("Usage: MemWatch pid");
}
long pid = Long.parseLong(args[0]);
long lastTime = System.currentTimeMillis();
ProcMem last = sigar.getProcMem(pid);
while (true) {
ProcMem cur = sigar.getProcMem(pid);
StringBuffer diff = diff(last, cur);
if (diff.length() == 0) {
System.out.println("no change " +
"(size=" +
Sigar.formatSize(cur.getSize()) +
")");
}
else {
long curTime = System.currentTimeMillis();
long timeDiff = curTime - lastTime;
lastTime = curTime;
diff.append(" after " + timeDiff + "ms");
System.out.println(diff);
}
last = cur;
Thread.sleep(SLEEP_TIME);
}
}
private static StringBuffer diff(ProcMem last, ProcMem cur) {
StringBuffer buf = new StringBuffer();
long diff;
diff = cur.getSize() - last.getSize();
if (diff != 0) {
buf.append("size=" + diff);
}
diff = cur.getResident() - last.getResident();
if (diff != 0) {
buf.append(", resident=" + diff);
}
diff = cur.getShare() - last.getShare();
if (diff != 0) {
buf.append(", share=" + diff);
}
return buf;
}
}