io.logspace.agent.shaded.quartz.impl.SchedulerRepository Maven / Gradle / Ivy
/*
* 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 io.logspace.agent.shaded.quartz.impl;
import java.util.Collection;
import java.util.HashMap;
import io.logspace.agent.shaded.quartz.Scheduler;
import io.logspace.agent.shaded.quartz.SchedulerException;
/**
*
* Holds references to Scheduler instances - ensuring uniqueness, and
* preventing garbage collection, and allowing 'global' lookups - all within a
* ClassLoader space.
*
*
* @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.");
}
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 lookupAll() {
return java.util.Collections
.unmodifiableCollection(schedulers.values());
}
}