/* * Copyright 2001-2009 Terracotta, Inc. * * 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. * */ 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<String, Scheduler> schedulers; private static SchedulerRepository inst; /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * Constructors. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ private SchedulerRepository() { schedulers = new HashMap<String, Scheduler>(); } /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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."); } schedulers.put(sched.getSchedulerName(), sched); } public synchronized boolean remove(String schedName) { return (schedulers.remove(schedName) != null); } public synchronized Scheduler lookup(String schedName) { return schedulers.get(schedName); } public synchronized Collection<Scheduler> lookupAll() { return java.util.Collections .unmodifiableCollection(schedulers.values()); } }