Quartz教程中文版

/* * Copyright 2004-2005 OpenSymphony * * 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. * */ /* * Previously Copyright (c) 2001-2004 James House */ package org.quartz.impl.jdbcjobstore; import java.io.IOException; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationHandler; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Proxy; import java.sql.Connection; import java.sql.SQLException; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.LinkedList; import java.util.List; import java.util.Set; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.quartz.Calendar; import org.quartz.CronTrigger; import org.quartz.JobDataMap; import org.quartz.JobDetail; import org.quartz.JobPersistenceException; import org.quartz.ObjectAlreadyExistsException; import org.quartz.Scheduler; import org.quartz.SchedulerConfigException; import org.quartz.SchedulerException; import org.quartz.SimpleTrigger; import org.quartz.Trigger; import org.quartz.core.SchedulingContext; import org.quartz.spi.ClassLoadHelper; import org.quartz.spi.JobStore; import org.quartz.spi.SchedulerSignaler; import org.quartz.spi.TriggerFiredBundle; import org.quartz.utils.DBConnectionManager; import org.quartz.utils.Key; import org.quartz.utils.TriggerStatus; /** * <p> * Contains base functionality for JDBC-based JobStore implementations. * </p> * * @author <a href="mailto:jeff@binaryfeed.org">Jeffrey Wescott</a> * @author James House */ public abstract class JobStoreSupport implements JobStore, Constants { /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * Constants. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ protected static final String LOCK_TRIGGER_ACCESS = "TRIGGER_ACCESS"; protected static final String LOCK_JOB_ACCESS = "JOB_ACCESS"; protected static final String LOCK_CALENDAR_ACCESS = "CALENDAR_ACCESS"; protected static final String LOCK_STATE_ACCESS = "STATE_ACCESS"; protected static final String LOCK_MISFIRE_ACCESS = "MISFIRE_ACCESS"; /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * Data members. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ protected String dsName; protected String tablePrefix = DEFAULT_TABLE_PREFIX; protected boolean useProperties = false; protected String instanceId; protected String instanceName; protected String delegateClassName; protected Class delegateClass = StdJDBCDelegate.class; protected HashMap calendarCache = new HashMap(); private DriverDelegate delegate; private long misfireThreshold = 60000L; // one minute private boolean dontSetAutoCommitFalse = false; private boolean isClustered = false; private boolean useDBLocks = false; private boolean lockOnInsert = true; private Semaphore lockHandler = null; // set in initialize() method... private String selectWithLockSQL = null; private long clusterCheckinInterval = 7500L; private ClusterManager clusterManagementThread = null; private MisfireHandler misfireHandler = null; private ClassLoadHelper classLoadHelper; private SchedulerSignaler signaler; protected int maxToRecoverAtATime = 20; private boolean setTxIsolationLevelSequential = false; private boolean acquireTriggersWithinLock = false; private long dbRetryInterval = 10000; private boolean makeThreadsDaemons = false; private boolean threadsInheritInitializersClassLoadContext = false; private ClassLoader initializersLoader = null; private boolean doubleCheckLockMisfireHandler = true; private final Log log = LogFactory.getLog(getClass()); /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * Interface. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ /** * <p> * Set the name of the <code>DataSource</code> that should be used for * performing database functions. * </p> */ public void setDataSource(String dsName) { this.dsName = dsName; } /** * <p> * Get the name of the <code>DataSource</code> that should be used for * performing database functions. * </p> */ public String getDataSource() { return dsName; } /** * <p> * Set the prefix that should be pre-pended to all table names. * </p> */ public void setTablePrefix(String prefix) { if (prefix == null) { prefix = ""; } this.tablePrefix = prefix; } /** * <p> * Get the prefix that should be pre-pended to all table names. * </p> */ public String getTablePrefix() { return tablePrefix; } /** * <p> * Set whether String-only properties will be handled in JobDataMaps. * </p> */ public void setUseProperties(String useProp) { if (useProp == null) { useProp = "false"; } this.useProperties = Boolean.valueOf(useProp).booleanValue(); } /** * <p> * Get whether String-only properties will be handled in JobDataMaps. * </p> */ public boolean canUseProperties() { return useProperties; } /** * <p> * Set the instance Id of the Scheduler (must be unique within a cluster). * </p> */ public void setInstanceId(String instanceId) { this.instanceId = instanceId; } /** * <p> * Get the instance Id of the Scheduler (must be unique within a cluster). * </p> */ public String getInstanceId() { return instanceId; } /** * Set the instance name of the Scheduler (must be unique within this server instance). */ public void setInstanceName(String instanceName) { this.instanceName = instanceName; } /** * Get the instance name of the Scheduler (must be unique within this server instance). */ public String getInstanceName() { return instanceName; } /** * <p> * Set whether this instance is part of a cluster. * </p> */ public void setIsClustered(boolean isClustered) { this.isClustered = isClustered; } /** * <p> * Get whether this instance is part of a cluster. * </p> */ public boolean isClustered() { return isClustered; } /** * <p> * Get the frequency (in milliseconds) at which this instance "checks-in" * with the other instances of the cluster. -- Affects the rate of * detecting failed instances. * </p> */ public long getClusterCheckinInterval() { return clusterCheckinInterval; } /** * <p> * Set the frequency (in milliseconds) at which this instance "ch