/* 
 * 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;

import java.util.Date;
import java.util.List;
import java.util.Set;

import org.quartz.Calendar;
import org.quartz.JobDataMap;
import org.quartz.JobDetail;
import org.quartz.JobListener;
import org.quartz.Scheduler;
import org.quartz.SchedulerContext;
import org.quartz.SchedulerException;
import org.quartz.SchedulerListener;
import org.quartz.SchedulerMetaData;
import org.quartz.Trigger;
import org.quartz.TriggerListener;
import org.quartz.UnableToInterruptJobException;
import org.quartz.core.QuartzScheduler;
import org.quartz.core.SchedulingContext;
import org.quartz.spi.JobFactory;

/**
 * <p>
 * An implementation of the <code>Scheduler</code> interface that directly
 * proxies all method calls to the equivalent call on a given <code>QuartzScheduler</code>
 * instance.
 * </p>
 * 
 * @see org.quartz.Scheduler
 * @see org.quartz.core.QuartzScheduler
 * @see org.quartz.core.SchedulingContext
 * 
 * @author James House
 */
public class StdScheduler implements Scheduler {

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Data members.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */

    private QuartzScheduler sched;

    private SchedulingContext schedCtxt;

    /*
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     * 
     * Constructors.
     * 
     * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     */

    /**
     * <p>
     * Construct a <code>StdScheduler</code> instance to proxy the given
     * <code>QuartzScheduler</code> instance, and with the given <code>SchedulingContext</code>.
     * </p>
     */
    public StdScheduler(QuartzScheduler sched, SchedulingContext schedCtxt) {
        this.sched = sched;
        this.schedCtxt = schedCtxt;
    }

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

    /**
     * <p>
     * Returns the name of the <code>Scheduler</code>.
     * </p>
     */
    public String getSchedulerName() {
        return sched.getSchedulerName();
    }

    /**
     * <p>
     * Returns the instance Id of the <code>Scheduler</code>.
     * </p>
     */
    public String getSchedulerInstanceId() {
        return sched.getSchedulerInstanceId();
    }

    public SchedulerMetaData getMetaData() {
        return new SchedulerMetaData(getSchedulerName(),
                getSchedulerInstanceId(), getClass(), false, isStarted(), 
                isInStandbyMode(), isShutdown(), sched.runningSince(), 
                sched.numJobsExecuted(), sched.getJobStoreClass(), 
                sched.supportsPersistence(), sched.getThreadPoolClass(), 
                sched.getThreadPoolSize(), sched.getVersion());

    }

    /**
     * <p>
     * Returns the <code>SchedulerContext</code> of the <code>Scheduler</code>.
     * </p>
     */
    public SchedulerContext getContext() throws SchedulerException {
        return sched.getSchedulerContext();
    }

    ///////////////////////////////////////////////////////////////////////////
    ///
    /// Schedululer State Management Methods
    ///
    ///////////////////////////////////////////////////////////////////////////

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     */
    public void start() throws SchedulerException {
        sched.start();
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     */
    public void startDelayed(int seconds) throws SchedulerException {
        sched.startDelayed(seconds);
    }


    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     * 
     * @deprecated
     * @see #standby()
     */
    public void pause() {
        this.standby();
    }
    
    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     */
    public void standby() {
        sched.standby();
    }
    
    /**
     * Whether the scheduler has been started.  
     * 
     * <p>
     * Note: This only reflects whether <code>{@link #start()}</code> has ever
     * been called on this Scheduler, so it will return <code>true</code> even 
     * if the <code>Scheduler</code> is currently in standby mode or has been 
     * since shutdown.
     * </p>
     * 
     * @see #start()
     * @see #isShutdown()
     * @see #isInStandbyMode()
     */    
    public boolean isStarted() {
        return (sched.runningSince() != null);
    }
    
    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     */
    public boolean isInStandbyMode() {
        return sched.isInStandbyMode();
    }

    /**
     * @deprecated
     */
    public boolean isPaused() {
        return isInStandbyMode();
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     */
    public void shutdown() {
        sched.shutdown();
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     */
    public void shutdown(boolean waitForJobsToComplete) {
        sched.shutdown(waitForJobsToComplete);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     */
    public boolean isShutdown() {
        return sched.isShutdown();
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>.
     * </p>
     */
    public List getCurrentlyExecutingJobs() {
        return sched.getCurrentlyExecutingJobs();
    }

    ///////////////////////////////////////////////////////////////////////////
    ///
    /// Scheduling-related Methods
    ///
    ///////////////////////////////////////////////////////////////////////////

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public Date scheduleJob(JobDetail jobDetail, Trigger trigger)
        throws SchedulerException {
        return sched.scheduleJob(schedCtxt, jobDetail, trigger);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public Date scheduleJob(Trigger trigger) throws SchedulerException {
        return sched.scheduleJob(schedCtxt, trigger);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public void addJob(JobDetail jobDetail, boolean replace)
        throws SchedulerException {
        sched.addJob(schedCtxt, jobDetail, replace);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public boolean deleteJob(String jobName, String groupName)
        throws SchedulerException {
        return sched.deleteJob(schedCtxt, jobName, groupName);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public boolean unscheduleJob(String triggerName, String groupName)
        throws SchedulerException {
        return sched.unscheduleJob(schedCtxt, triggerName, groupName);
    }
    
    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public Date rescheduleJob(String triggerName,
            String groupName, Trigger newTrigger) throws SchedulerException {
        return sched.rescheduleJob(schedCtxt, triggerName, groupName, newTrigger);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public void triggerJob(String jobName, String groupName)
        throws SchedulerException {
        triggerJob(jobName, groupName, null);
    }
    
    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public void triggerJob(String jobName, String groupName, JobDataMap data)
        throws SchedulerException {
        sched.triggerJob(schedCtxt, jobName, groupName, data);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public void triggerJobWithVolatileTrigger(String jobName, String groupName)
        throws SchedulerException {
        triggerJobWithVolatileTrigger(jobName, groupName, null);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public void triggerJobWithVolatileTrigger(String jobName, String groupName, JobDataMap data)
        throws SchedulerException {
        sched.triggerJobWithVolatileTrigger(schedCtxt, jobName, groupName, data);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public void pauseTrigger(String triggerName, String groupName)
        throws SchedulerException {
        sched.pauseTrigger(schedCtxt, triggerName, groupName);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public void pauseTriggerGroup(String groupName) throws SchedulerException {
        sched.pauseTriggerGroup(schedCtxt, groupName);
    }

    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */
    public void pauseJob(String jobName, String groupName)
        throws SchedulerException {
        sched.pauseJob(schedCtxt, jobName, groupName);
    }

    /** 
     * @see org.quartz.Scheduler#getPausedTriggerGroups()
     */
    public Set getPausedTriggerGroups() throws SchedulerException {
        return sched.getPausedTriggerGroups(schedCtxt);
    }
    
    /**
     * <p>
     * Calls the equivalent method on the 'proxied' <code>QuartzScheduler</code>,
     * passing the <code>SchedulingContext</code> associated with this
     * instance.
     * </p>
     */