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122 lines
4.0 KiB
122 lines
4.0 KiB
// serverProfiling.java
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// (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 17.11.2007 on http://yacy.net
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
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// $LastChangedRevision: 1986 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.server;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentLinkedQueue;
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import de.anomic.kelondro.tools.MemoryControl;
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public class serverProfiling extends Thread {
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private static final Map<String, ConcurrentLinkedQueue<Event>> historyMaps = new ConcurrentHashMap<String, ConcurrentLinkedQueue<Event>>(); // value=TreeMap of Long/Event
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private static final Map<String, Long> eventAccess = new ConcurrentHashMap<String, Long>(); // value: last time when this was accessed
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private static serverProfiling systemProfiler = null;
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public static void startSystemProfiling() {
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systemProfiler = new serverProfiling(1000);
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systemProfiler.start();
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}
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public static void stopSystemProfiling() {
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systemProfiler.running = false;
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}
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private final long delaytime;
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private boolean running;
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public serverProfiling(final long time) {
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this.delaytime = time;
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running = true;
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}
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public void run() {
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while (running) {
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update("memory", Long.valueOf(MemoryControl.used()));
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try {
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Thread.sleep(this.delaytime);
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} catch (final InterruptedException e) {
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this.running = false;
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}
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}
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}
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public static void update(final String eventName, final Object eventPayload) {
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// get event history container
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Long lastAcc = eventAccess.get(eventName);
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if (lastAcc == null) {
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eventAccess.put(eventName, new Long(System.currentTimeMillis()));
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} else {
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if (System.currentTimeMillis() - lastAcc.longValue() > 1000) {
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eventAccess.put(eventName, new Long(System.currentTimeMillis()));
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} else {
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return; // protect against too heavy load
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}
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}
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ConcurrentLinkedQueue<Event> history = historyMaps.get(eventName);
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if (history != null) {
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// update entry
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history.add(new Event(eventPayload));
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// clean up too old entries
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Event e;
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final long now = System.currentTimeMillis();
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while (history.size() > 0) {
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e = history.peek();
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if (now - e.time < 600000) break;
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history.poll();
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}
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} else {
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history = new ConcurrentLinkedQueue<Event>();
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// update entry
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history.add(new Event(eventPayload));
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// store map
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historyMaps.put(eventName, history);
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}
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}
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public static Iterator<Event> history(final String eventName) {
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return (historyMaps.containsKey(eventName) ? (historyMaps.get(eventName)) : new ConcurrentLinkedQueue<Event>()).iterator();
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}
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public static class Event {
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public Object payload;
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public long time;
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public Event(final Object payload) {
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this.payload = payload;
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this.time = System.currentTimeMillis();
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}
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}
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}
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