| /* |
| * 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.geode.internal.sequencelog; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.util.EnumSet; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.LinkedBlockingQueue; |
| |
| import org.apache.geode.annotations.Immutable; |
| import org.apache.geode.internal.sequencelog.io.OutputStreamAppender; |
| import org.apache.geode.logging.internal.OSProcess; |
| import org.apache.geode.util.internal.GeodeGlossary; |
| |
| public class SequenceLoggerImpl implements SequenceLogger { |
| |
| @Immutable |
| private static final SequenceLoggerImpl INSTANCE; |
| |
| public static final String ENABLED_TYPES_PROPERTY = |
| GeodeGlossary.GEMFIRE_PREFIX + "GraphLoggerImpl.ENABLED_TYPES"; |
| |
| private final EnumSet<GraphType> enabledTypes; |
| |
| static { |
| SequenceLoggerImpl logger = new SequenceLoggerImpl(); |
| logger.start(); |
| INSTANCE = logger; |
| } |
| |
| // TODO - this might be too much synchronization for recording all region |
| // operations. Maybe we should use a ConcurrentLinkedQueue instead? |
| private final LinkedBlockingQueue<Transition> edges = new LinkedBlockingQueue<Transition>(); |
| |
| private volatile OutputStreamAppender appender; |
| |
| private ConsumerThread consumerThread; |
| |
| public static SequenceLogger getInstance() { |
| return INSTANCE; |
| } |
| |
| /** |
| * Should be invoked when GemFire cache is closing or closed. |
| */ |
| public static void signalCacheClose() { |
| if (INSTANCE != null && INSTANCE.consumerThread != null) { |
| INSTANCE.consumerThread.interrupt(); |
| } |
| } |
| |
| @Override |
| public boolean isEnabled(GraphType type) { |
| return enabledTypes.contains(type); |
| } |
| |
| @Override |
| public void logTransition(GraphType type, Object graphName, Object edgeName, Object state, |
| Object source, Object dest) { |
| if (isEnabled(type)) { |
| Transition edge = new Transition(type, graphName, edgeName, state, source, dest); |
| edges.add(edge); |
| } |
| } |
| |
| @Override |
| public void flush() throws InterruptedException { |
| FlushToken token = new FlushToken(); |
| edges.add(token); |
| token.cdl.await(); |
| } |
| |
| private SequenceLoggerImpl() { |
| String enabledTypesString = System.getProperty(ENABLED_TYPES_PROPERTY, ""); |
| this.enabledTypes = GraphType.parse(enabledTypesString); |
| if (!enabledTypes.isEmpty()) { |
| try { |
| String name = "states" + OSProcess.getId() + ".graph"; |
| appender = new OutputStreamAppender(new File(name)); |
| } catch (FileNotFoundException e) { |
| } |
| } |
| } |
| |
| private void start() { |
| if (!enabledTypes.isEmpty()) { |
| consumerThread = new ConsumerThread(); |
| consumerThread.start(); |
| } |
| } |
| |
| private class ConsumerThread extends Thread { |
| |
| public ConsumerThread() { |
| super("State Logger Consumer Thread"); |
| setDaemon(true); |
| } |
| |
| @Override |
| public void run() { |
| Transition edge; |
| while (true) { |
| try { |
| edge = edges.take(); |
| if (edge instanceof FlushToken) { |
| ((FlushToken) edge).cdl.countDown(); |
| continue; |
| } |
| |
| if (appender != null) { |
| appender.write(edge); |
| } |
| } catch (InterruptedException e) { |
| // do nothing |
| } catch (Throwable t) { |
| t.printStackTrace(); |
| appender.close(); |
| appender = null; |
| } |
| } |
| } |
| } |
| |
| private static class FlushToken extends Transition { |
| CountDownLatch cdl = new CountDownLatch(1); |
| |
| public FlushToken() { |
| super(null, null, null, null, null, null); |
| } |
| } |
| } |