jobinitializationplugin.java

时间调度相关的开源代码

/* 
 * 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.plugins.xml;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;

import javax.transaction.UserTransaction;

import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SimpleTrigger;
import org.quartz.jobs.FileScanJob;
import org.quartz.jobs.FileScanListener;
import org.quartz.plugins.SchedulerPluginWithUserTransactionSupport;
import org.quartz.simpl.CascadingClassLoadHelper;
import org.quartz.spi.ClassLoadHelper;
import org.quartz.xml.JobSchedulingDataProcessor;

/**
 * This plugin loads XML file(s) to add jobs and schedule them with triggers
 * as the scheduler is initialized, and can optionally periodically scan the
 * file for changes.
 * 
 * <p>
 * The periodically scanning of files for changes is not currently supported in a 
 * clustered environment.
 * </p>
 * 
 * <p>
 * If using the JobInitializationPlugin with JobStoreCMT, be sure to set the
 * plugin property <em>wrapInUserTransaction</em> to true.  Also, if have a 
 * positive <em>scanInterval</em> be sure to set 
 * <em>org.quartz.scheduler.wrapJobExecutionInUserTransaction</em> to true.
 * </p>
 * 
 * @author James House
 * @author Pierre Awaragi
 * @author pl47ypus
 */
public class JobInitializationPlugin 
    extends SchedulerPluginWithUserTransactionSupport 
    implements FileScanListener {

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Data members.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */
    private static final int MAX_JOB_TRIGGER_NAME_LEN = 80;
    private static final String JOB_INITIALIZATION_PLUGIN_NAME = "JobInitializationPlugin";
    private static final String FILE_NAME_DELIMITERS = ",";
    
    private boolean overWriteExistingJobs = false;

    private boolean failOnFileNotFound = true;

    private String fileNames = JobSchedulingDataProcessor.QUARTZ_XML_FILE_NAME;

    // Populated by initialization
    private Map jobFiles = new HashMap();

    private boolean validating = false;
    
    private boolean validatingSchema = true;

    private long scanInterval = 0; 
    
    boolean started = false;
    
    protected ClassLoadHelper classLoadHelper = null;

    private Set jobTriggerNameSet = new HashSet();
    
    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Constructors.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */

    public JobInitializationPlugin() {
    }

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Interface.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */

    /**
     * The file name (and path) to the XML file that should be read.
     * @deprecated Use fileNames with just one file.
     */
    public String getFileName() {
        return fileNames;
    }

    /**
     * The file name (and path) to the XML file that should be read.
     * @deprecated Use fileNames with just one file.
     */
    public void setFileName(String fileName) {
        getLog().warn("The \"filename\" plugin property is deprecated.  Please use \"filenames\" in the future.");
        this.fileNames = fileName;
    }

    /**
     * Comma separated list of file names (with paths) to the XML files that should be read.
     */
    public String getFileNames() {
        return fileNames;
    }

    /**
     * The file name (and path) to the XML file that should be read.
     */
    public void setFileNames(String fileNames) {
        this.fileNames = fileNames;
    }
    
    /**
     * Whether or not jobs defined in the XML file should be overwrite existing
     * jobs with the same name.
     */
    public boolean isOverWriteExistingJobs() {
        return overWriteExistingJobs;
    }

    /**
     * Whether or not jobs defined in the XML file should be overwrite existing
     * jobs with the same name.
     * 
     * @param overWriteExistingJobs
     */
    public void setOverWriteExistingJobs(boolean overWriteExistingJobs) {
        this.overWriteExistingJobs = overWriteExistingJobs;
    }

    /**
     * The interval (in seconds) at which to scan for changes to the file.  
     * If the file has been changed, it is re-loaded and parsed.   The default 
     * value for the interval is 0, which disables scanning.
     * 
     * @return Returns the scanInterval.
     */
    public long getScanInterval() {
        return scanInterval / 1000;
    }

    /**
     * The interval (in seconds) at which to scan for changes to the file.  
     * If the file has been changed, it is re-loaded and parsed.   The default 
     * value for the interval is 0, which disables scanning.
     * 
     * @param scanInterval The scanInterval to set.
     */
    public void setScanInterval(long scanInterval) {
        this.scanInterval = scanInterval * 1000;
    }
    
    /**
     * Whether or not initialization of the plugin should fail (throw an
     * exception) if the file cannot be found. Default is <code>true</code>.
     */
    public boolean isFailOnFileNotFound() {
        return failOnFileNotFound;
    }

    /**
     * Whether or not initialization of the plugin should fail (throw an
     * exception) if the file cannot be found. Default is <code>true</code>.
     */
    public void setFailOnFileNotFound(boolean failOnFileNotFound) {
        this.failOnFileNotFound = failOnFileNotFound;
    }
    
    /**
     * Whether or not the XML should be validated. Default is <code>false</code>.
     */
    public boolean isValidating() {
        return validating;
    }

    /**
     * Whether or not the XML should be validated. Default is <code>false</code>.
     */
    public void setValidating(boolean validating) {
        this.validating = validating;
    }
    
    /**
     * Whether or not the XML schema should be validated. Default is <code>true</code>.
     */
    public boolean isValidatingSchema() {
        return validatingSchema;
    }

    /**
     * Whether or not the XML schema should be validated. Default is <code>true</code>.
     */
    public void setValidatingSchema(boolean validatingSchema) {
        this.validatingSchema = validatingSchema;
    }

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     *