?? schedulerrepository.java
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/* * 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.Collection;import java.util.HashMap;import org.quartz.Scheduler;import org.quartz.SchedulerException;/** * <p> * Holds references to Scheduler instances - ensuring uniqueness, and * preventing garbage collection, and allowing 'global' lookups - all within a * ClassLoader space. * </p> * * @author James House */public class SchedulerRepository { /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * Data members. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ private HashMap schedulers; private static SchedulerRepository inst; /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * Constructors. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ private SchedulerRepository() { schedulers = new HashMap(); } /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * Interface. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ public static synchronized SchedulerRepository getInstance() { if (inst == null) { inst = new SchedulerRepository(); } return inst; } public synchronized void bind(Scheduler sched) throws SchedulerException { if ((Scheduler) schedulers.get(sched.getSchedulerName()) != null) { throw new SchedulerException("Scheduler with name '" + sched.getSchedulerName() + "' already exists.", SchedulerException.ERR_BAD_CONFIGURATION); } schedulers.put(sched.getSchedulerName(), sched); } public synchronized boolean remove(String schedName) { return (schedulers.remove(schedName) != null); } public synchronized Scheduler lookup(String schedName) { return (Scheduler) schedulers.get(schedName); } public synchronized Collection lookupAll() { return java.util.Collections .unmodifiableCollection(schedulers.values()); }}
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