/*
* Copyright 1999-2015 dangdang.com.
* <p>
* 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.
* </p>
*/
package com.dangdang.ddframe.job.lite.internal.guarantee;
import com.dangdang.ddframe.job.lite.api.listener.AbstractDistributeOnceElasticJobListener;
import com.dangdang.ddframe.job.lite.api.listener.ElasticJobListener;
import com.dangdang.ddframe.job.lite.internal.listener.AbstractJobListener;
import com.dangdang.ddframe.job.lite.internal.listener.AbstractListenerManager;
import com.dangdang.ddframe.job.reg.base.CoordinatorRegistryCenter;
import org.apache.curator.framework.recipes.cache.TreeCacheEvent.Type;
import java.util.List;
/**
* 保证分布式任务全部开始和结束状态监听管理器.
*
* @author zhangliang
*/
public final class GuaranteeListenerManager extends AbstractListenerManager {
private final GuaranteeNode guaranteeNode;
private final List<ElasticJobListener> elasticJobListeners;
public GuaranteeListenerManager(final CoordinatorRegistryCenter regCenter, final String jobName, final List<ElasticJobListener> elasticJobListeners) {
super(regCenter, jobName);
this.guaranteeNode = new GuaranteeNode(jobName);
this.elasticJobListeners = elasticJobListeners;
}
@Override
public void start() {
addDataListener(new StartedNodeRemovedJobListener());
addDataListener(new CompletedNodeRemovedJobListener());
}
class StartedNodeRemovedJobListener extends AbstractJobListener {
@Override
protected void dataChanged(final String path, final Type eventType, final String data) {
if (Type.NODE_REMOVED == eventType && guaranteeNode.isStartedRootNode(path)) {
for (ElasticJobListener each : elasticJobListeners) {
if (each instanceof AbstractDistributeOnceElasticJobListener) {
((AbstractDistributeOnceElasticJobListener) each).notifyWaitingTaskStart();
}
}
}
}
}
class CompletedNodeRemovedJobListener extends AbstractJobListener {
@Override
protected void dataChanged(final String path, final Type eventType, final String data) {
if (Type.NODE_REMOVED == eventType && guaranteeNode.isCompletedRootNode(path)) {
for (ElasticJobListener each : elasticJobListeners) {
if (each instanceof AbstractDistributeOnceElasticJobListener) {
((AbstractDistributeOnceElasticJobListener) each).notifyWaitingTaskComplete();
}
}
}
}
}
}