/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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*/
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package org.opends.server.backends.jeb;
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import org.opends.messages.Message;
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import org.opends.server.types.*;
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import java.util.ArrayList;
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import java.util.TimerTask;
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import java.util.Timer;
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import java.util.concurrent.CopyOnWriteArrayList;
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import java.util.concurrent.locks.ReentrantLock;
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import com.sleepycat.je.DatabaseException;
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import com.sleepycat.je.StatsConfig;
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import com.sleepycat.je.EnvironmentStats;
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import static org.opends.server.loggers.ErrorLogger.logError;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.core.DirectoryServer;
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import static org.opends.messages.JebMessages.
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ERR_JEB_ATTRIBUTE_INDEX_NOT_CONFIGURED;
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import static org.opends.messages.JebMessages.
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NOTE_JEB_REBUILD_PROGRESS_REPORT;
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import static org.opends.messages.JebMessages.
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NOTE_JEB_REBUILD_FINAL_STATUS;
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import static org.opends.messages.JebMessages.
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NOTE_JEB_REBUILD_CACHE_AND_MEMORY_REPORT;
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import static org.opends.messages.JebMessages.
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ERR_JEB_REBUILD_INDEX_CONFLICT;
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import static org.opends.messages.JebMessages.
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NOTE_JEB_REBUILD_START;
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import static org.opends.messages.JebMessages.
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ERR_JEB_VLV_INDEX_NOT_CONFIGURED;
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/**
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* Runs a index rebuild process on the backend. Each index selected for rebuild
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* will be done from scratch by first clearing out the database for that index.
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* Different threads will be used to rebuild each index.
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* The rebuild process can run concurrently with the backend online and
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* performing write and read operations. However, during the rebuild process,
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* other reader and writer activeThreads might notice inconsistencies in index
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* databases being rebuilt. They can safely ignore these inconsistencies as long
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* as a rebuild is in progress.
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*/
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public class RebuildJob
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{
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/**
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* The tracer object for the debug logger.
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*/
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private static final DebugTracer TRACER = getTracer();
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/**
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* The rebuild configuraiton.
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*/
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private RebuildConfig rebuildConfig;
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/**
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* The root container used for the verify job.
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*/
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private RootContainer rootContainer;
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/**
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* The number of milliseconds between job progress reports.
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*/
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private long progressInterval = 10000;
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/**
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* The waiting rebuild threads created to process the rebuild.
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*/
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private CopyOnWriteArrayList<IndexRebuildThread> waitingThreads =
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new CopyOnWriteArrayList<IndexRebuildThread>();
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/**
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* The active rebuild threads created to process the rebuild.
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*/
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private CopyOnWriteArrayList<IndexRebuildThread> activeThreads =
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new CopyOnWriteArrayList<IndexRebuildThread>();
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/**
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* The completed rebuild threads used to process the rebuild.
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*/
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private CopyOnWriteArrayList<IndexRebuildThread> completedThreads =
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new CopyOnWriteArrayList<IndexRebuildThread>();
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/**
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* Rebuild jobs currently running.
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*/
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private static CopyOnWriteArrayList<RebuildJob> rebuildJobs =
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new CopyOnWriteArrayList<RebuildJob>();
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/**
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* A mutex that will be used to provide threadsafe access to methods changing
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* the set of currently running rebuild jobs.
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*/
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private static ReentrantLock jobsMutex = new ReentrantLock();
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/**
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* This class reports progress of the rebuild job at fixed intervals.
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*/
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class ProgressTask extends TimerTask
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{
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/**
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* The number of records that had been processed at the time of the
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* previous progress report.
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*/
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private long previousProcessed = 0;
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/**
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* The time in milliseconds of the previous progress report.
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*/
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private long previousTime;
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/**
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* The environment statistics at the time of the previous report.
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*/
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private EnvironmentStats prevEnvStats;
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/**
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* The number of bytes in a megabyte.
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* Note that 1024*1024 bytes may eventually become known as a mebibyte(MiB).
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*/
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private static final int bytesPerMegabyte = 1024*1024;
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/**
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* Create a new verify progress task.
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* @throws DatabaseException An error occurred while accessing the JE
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* database.
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*/
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public ProgressTask() throws DatabaseException
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{
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previousTime = System.currentTimeMillis();
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prevEnvStats =
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rootContainer.getEnvironmentStats(new StatsConfig());
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}
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/**
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* The action to be performed by this timer task.
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*/
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public void run()
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{
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long latestTime = System.currentTimeMillis();
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long deltaTime = latestTime - previousTime;
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if (deltaTime == 0)
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{
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return;
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}
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long totalEntries = 0;
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long latestProcessed = 0;
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ArrayList<IndexRebuildThread> allThreads =
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new ArrayList<IndexRebuildThread>(waitingThreads);
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allThreads.addAll(activeThreads);
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allThreads.addAll(completedThreads);
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for(IndexRebuildThread thread : allThreads)
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{
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try
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{
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totalEntries += thread.getTotalEntries();
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latestProcessed += thread.getProcessedEntries();
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if(debugEnabled())
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{
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TRACER.debugVerbose("Rebuild thread %s stats: total %d " +
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"processed %d rebuilt %d duplicated %d skipped %d",
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thread.getTotalEntries(), thread.getProcessedEntries(),
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thread.getRebuiltEntries(),
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thread.getDuplicatedEntries(),
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thread.getSkippedEntries());
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}
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}
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catch(Exception e)
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{
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if(debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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}
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}
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long deltaCount = (latestProcessed - previousProcessed);
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float rate = 1000f*deltaCount / deltaTime;
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float completed = 0;
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if(totalEntries > 0)
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{
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completed = 100f*latestProcessed / totalEntries;
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}
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Message message = NOTE_JEB_REBUILD_PROGRESS_REPORT.get(
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completed, latestProcessed, totalEntries, rate);
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logError(message);
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try
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{
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Runtime runtime = Runtime.getRuntime();
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long freeMemory = runtime.freeMemory() / bytesPerMegabyte;
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EnvironmentStats envStats =
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rootContainer.getEnvironmentStats(new StatsConfig());
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long nCacheMiss =
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envStats.getNCacheMiss() - prevEnvStats.getNCacheMiss();
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float cacheMissRate = 0;
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if (deltaCount > 0)
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{
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cacheMissRate = nCacheMiss/(float)deltaCount;
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}
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message = NOTE_JEB_REBUILD_CACHE_AND_MEMORY_REPORT.get(
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freeMemory, cacheMissRate);
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logError(message);
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prevEnvStats = envStats;
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}
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catch (DatabaseException e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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}
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previousProcessed = latestProcessed;
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previousTime = latestTime;
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}
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}
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/**
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* Construct a new rebuild job.
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*
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* @param rebuildConfig The configuration to use for this rebuild job.
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*/
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public RebuildJob(RebuildConfig rebuildConfig)
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{
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this.rebuildConfig = rebuildConfig;
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}
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private static void addJob(RebuildJob job)
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throws DatabaseException, JebException
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{
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//Make sure there are no running rebuild jobs
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jobsMutex.lock();
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try
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{
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for(RebuildJob otherJob : rebuildJobs)
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{
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String conflictIndex =
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job.rebuildConfig.checkConflicts(otherJob.rebuildConfig);
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if(conflictIndex != null)
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{
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if(debugEnabled())
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{
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TRACER.debugError("Conflit detected. This job config: %s, " +
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"That job config: %s.",
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job.rebuildConfig, otherJob.rebuildConfig);
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}
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Message msg = ERR_JEB_REBUILD_INDEX_CONFLICT.get(conflictIndex);
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throw new JebException(msg);
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}
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}
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//No conflicts are found. Add the job to the list of currently running
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// jobs.
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rebuildJobs.add(job);
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}
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finally
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{
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jobsMutex.unlock();
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}
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}
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private static void removeJob(RebuildJob job)
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{
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jobsMutex.lock();
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rebuildJobs.remove(job);
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jobsMutex.unlock();
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}
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/**
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* Initiate the rebuild process on a backend.
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*
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* @param rootContainer The root container to rebuild in.
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* @throws DirectoryException If an error occurs during the rebuild process.
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* @throws DatabaseException If a JE database error occurs during the rebuild
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* process.
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* @throws JebException If a JE database error occurs during the rebuild
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* process.
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*/
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public void rebuildBackend(RootContainer rootContainer)
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throws DirectoryException, DatabaseException, JebException
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{
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//TODO: Add check for only performing internal indexType rebuilds when
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// backend is offline.
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addJob(this);
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try
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{
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this.rootContainer = rootContainer;
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EntryContainer entryContainer =
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rootContainer.getEntryContainer(rebuildConfig.getBaseDN());
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ArrayList<String> rebuildList = rebuildConfig.getRebuildList();
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if(!rebuildList.isEmpty())
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{
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for (String index : rebuildList)
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{
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IndexRebuildThread rebuildThread;
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String lowerName = index.toLowerCase();
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if (lowerName.equals("dn2id"))
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{
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rebuildThread = new IndexRebuildThread(entryContainer,
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IndexRebuildThread.IndexType.DN2ID);
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}
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else if (lowerName.equals("dn2uri"))
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{
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rebuildThread = new IndexRebuildThread(entryContainer,
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IndexRebuildThread.IndexType.DN2URI);
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}
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else if (lowerName.equals("id2children"))
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{
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rebuildThread = new IndexRebuildThread(entryContainer,
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IndexRebuildThread.IndexType.ID2CHILDREN);
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}
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else if (lowerName.equals("id2subtree"))
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{
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rebuildThread = new IndexRebuildThread(entryContainer,
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IndexRebuildThread.IndexType.ID2SUBTREE);
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}
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else if (lowerName.startsWith("vlv."))
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{
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if(lowerName.length() < 5)
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{
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Message msg = ERR_JEB_VLV_INDEX_NOT_CONFIGURED.get(lowerName);
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throw new JebException(msg);
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}
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VLVIndex vlvIndex =
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entryContainer.getVLVIndex(lowerName.substring(4));
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if(vlvIndex == null)
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{
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Message msg =
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ERR_JEB_VLV_INDEX_NOT_CONFIGURED.get(lowerName.substring(4));
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throw new JebException(msg);
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}
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rebuildThread = new IndexRebuildThread(entryContainer, vlvIndex);
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}
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else
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{
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String[] attrIndexParts = lowerName.split("\\.");
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if(attrIndexParts.length <= 0)
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{
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Message msg = ERR_JEB_ATTRIBUTE_INDEX_NOT_CONFIGURED.get(index);
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throw new JebException(msg);
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}
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AttributeType attrType =
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DirectoryServer.getAttributeType(attrIndexParts[0]);
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if (attrType == null)
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{
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Message msg = ERR_JEB_ATTRIBUTE_INDEX_NOT_CONFIGURED.get(index);
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throw new JebException(msg);
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}
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AttributeIndex attrIndex =
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entryContainer.getAttributeIndex(attrType);
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if (attrIndex == null)
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{
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Message msg = ERR_JEB_ATTRIBUTE_INDEX_NOT_CONFIGURED.get(index);
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throw new JebException(msg);
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}
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if(attrIndexParts.length > 1)
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{
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Index partialAttrIndex = null;
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if(attrIndexParts[1].equals("presence"))
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{
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partialAttrIndex = attrIndex.presenceIndex;
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}
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else if(attrIndexParts[1].equals("equality"))
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{
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partialAttrIndex = attrIndex.equalityIndex;
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}
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else if(attrIndexParts[1].equals("substring"))
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{
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partialAttrIndex = attrIndex.substringIndex;
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}
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else if(attrIndexParts[1].equals("ordering"))
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{
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partialAttrIndex = attrIndex.orderingIndex;
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}
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else if(attrIndexParts[1].equals("approximate"))
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{
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partialAttrIndex = attrIndex.approximateIndex;
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}
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if(partialAttrIndex == null)
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{
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Message msg = ERR_JEB_ATTRIBUTE_INDEX_NOT_CONFIGURED.get(index);
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throw new JebException(msg);
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}
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rebuildThread =
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new IndexRebuildThread(entryContainer, partialAttrIndex);
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}
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else
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{
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rebuildThread = new IndexRebuildThread(entryContainer,
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attrIndex);
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}
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}
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waitingThreads.add(rebuildThread);
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if(debugEnabled())
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{
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TRACER.debugInfo("Created rebuild thread %s",
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rebuildThread.getName());
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}
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}
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//Log a start message.
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long totalToProcess = 0;
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for(IndexRebuildThread thread : waitingThreads)
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{
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totalToProcess += thread.getTotalEntries();
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}
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StringBuilder sb = new StringBuilder();
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for(String index : rebuildList)
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{
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if(sb.length() > 0)
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{
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sb.append(", ");
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}
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sb.append(index);
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}
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Message message =
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NOTE_JEB_REBUILD_START.get(sb.toString(), totalToProcess);
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logError(message);
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// Make a note of the time we started.
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long startTime = System.currentTimeMillis();
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// Start a timer for the progress report.
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Timer timer = new Timer();
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TimerTask progressTask = new ProgressTask();
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timer.scheduleAtFixedRate(progressTask, progressInterval,
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progressInterval);
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entryContainer.exclusiveLock.lock();
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try
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{
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for(IndexRebuildThread thread : waitingThreads)
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{
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thread.clearDatabase();
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}
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}
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finally
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{
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if(!rebuildConfig.includesSystemIndex())
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{
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entryContainer.exclusiveLock.unlock();
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}
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}
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if(!rebuildConfig.includesSystemIndex())
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{
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entryContainer.sharedLock.lock();
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}
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try
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{
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while(!waitingThreads.isEmpty())
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{
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dispatchThreads();
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joinThreads();
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}
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}
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finally
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{
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timer.cancel();
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if(rebuildConfig.includesSystemIndex())
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{
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entryContainer.exclusiveLock.unlock();
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}
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else
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{
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entryContainer.sharedLock.unlock();
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}
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}
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long totalProcessed = 0;
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long totalRebuilt = 0;
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long totalDuplicated = 0;
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long totalSkipped = 0;
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for(IndexRebuildThread thread : completedThreads)
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{
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totalProcessed += thread.getProcessedEntries();
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totalRebuilt += thread.getRebuiltEntries();
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totalDuplicated += thread.getDuplicatedEntries();
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totalSkipped += thread.getSkippedEntries();
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}
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long finishTime = System.currentTimeMillis();
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long totalTime = (finishTime - startTime);
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float rate = 0;
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if (totalTime > 0)
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{
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rate = 1000f*totalProcessed / totalTime;
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}
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message = NOTE_JEB_REBUILD_FINAL_STATUS.get(
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totalProcessed, totalTime/1000, rate);
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logError(message);
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if(debugEnabled())
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{
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TRACER.debugInfo("Detailed overall rebuild job stats: rebuilt %d, " +
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"duplicated %d, skipped %d",
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totalRebuilt, totalDuplicated, totalSkipped);
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}
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}
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}
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finally
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{
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removeJob(this);
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}
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}
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/**
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* Dispatch a set of threads based on their dependency and ordering.
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*/
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private void dispatchThreads() throws DatabaseException
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{
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for(IndexRebuildThread t : waitingThreads)
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{
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boolean start = true;
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//Check to see if we have exceeded the max number of threads to use at
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//one time.
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if(rebuildConfig.getMaxRebuildThreads() > 0 &&
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activeThreads.size() > rebuildConfig.getMaxRebuildThreads())
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{
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if(debugEnabled())
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{
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TRACER.debugInfo("Delaying the start of thread %s because " +
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"the max number of rebuild threads has been reached.");
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}
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start = false;
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}
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/**
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* We may need to start the threads in stages since the rebuild process
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* of some index types (id2children, id2subtree) depends on another
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* index being rebuilt to be completed first.
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*/
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if(t.getIndexType() == IndexRebuildThread.IndexType.ID2CHILDREN ||
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t.getIndexType() == IndexRebuildThread.IndexType.ID2SUBTREE)
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{
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//Check to see if we have any waiting threads that needs to go
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//first
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for(IndexRebuildThread t2 : waitingThreads)
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{
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if(t2.getIndexType() == IndexRebuildThread.IndexType.DN2ID ||
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t2.getIndexType() == IndexRebuildThread.IndexType.DN2URI)
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{
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//We gotta wait for these to start before running the
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//rebuild on ID2CHILDREN or ID2SUBTREE
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if(debugEnabled())
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{
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TRACER.debugInfo("Delaying the start of thread %s because " +
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"it depends on another index rebuilt to " +
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"go first.", t.getName());
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}
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start = false;
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break;
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}
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}
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//Check to see if we have any active threads that needs to
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//finish first
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for(IndexRebuildThread t3 : activeThreads)
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{
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if(t3.getIndexType() == IndexRebuildThread.IndexType.DN2ID ||
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t3.getIndexType() == IndexRebuildThread.IndexType.DN2URI)
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{
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//We gotta wait for these to start before running the
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//rebuild on ID2CHILDREN or ID2SUBTREE
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if(debugEnabled())
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{
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TRACER.debugInfo("Delaying the start of thread %s because " +
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"it depends on another index being rebuilt to " +
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"finish.", t.getName());
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}
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start = false;
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break;
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}
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}
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}
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if(start)
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{
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if(debugEnabled())
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{
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TRACER.debugInfo("Starting rebuild thread %s.", t.getName());
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}
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waitingThreads.remove(t);
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activeThreads.add(t);
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t.start();
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}
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}
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}
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/**
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* Wait for all worker activeThreads to exit.
|
*/
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private void joinThreads()
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{
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for (IndexRebuildThread t : activeThreads)
|
{
|
try
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{
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t.join();
|
|
if(debugEnabled())
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{
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TRACER.debugInfo("Rebuild thread %s finished.", t.getName());
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}
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activeThreads.remove(t);
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completedThreads.add(t);
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}
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catch (InterruptedException ie)
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{
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// No action needed?
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}
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}
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}
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}
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