/**
* Copyright 2011, Deft Labs.
*
* 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 com.deftlabs.lock.mongo;
// Lib
import com.deftlabs.lock.mongo.impl.SvcImpl;
/**
* The distrbuted lock service factory.
*/
public final class DistributedLockSvcFactory {
public DistributedLockSvcFactory(final DistributedLockSvcOptions pOptions) {
_options = pOptions;
}
/**
* Returns the global lock service. This method also calls the startup method on the
* lock service returned (when it is created).
*/
public DistributedLockSvc getLockSvc() {
if (_lockSvc != null && _lockSvc.isRunning()) return _lockSvc;
synchronized(_mutex) {
if (_lockSvc != null && _lockSvc.isRunning()) return _lockSvc;
final SvcImpl svc = new SvcImpl(_options);
svc.startup();
_lockSvc = svc;
return _lockSvc;
}
}
private static volatile DistributedLockSvc _lockSvc = null;
private final DistributedLockSvcOptions _options;
private final static Object _mutex = new Object();
}