blob: 8e0e37f8d105cccf9f9e247c9bb9ed62ec26897a [file] [log] [blame]
package org.apache.helix.controller.pipeline;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import org.apache.helix.common.DedupEventProcessor;
import org.apache.helix.controller.stages.AttributeName;
import org.apache.helix.controller.stages.ClusterEvent;
public class AbstractBaseStage implements Stage {
protected String _eventId;
@Override
public void init(StageContext context) {
}
@Override
public void preProcess() {
// TODO Auto-generated method stub
}
@Override
public void process(ClusterEvent event) throws Exception {
}
@Override
public void postProcess() {
}
@Override
public void release() {
}
@Override
public String getStageName() {
// default stage name will be the class name
String className = this.getClass().getSimpleName();
return className;
}
public static <T> Future asyncExecute(ExecutorService service, Callable<T> task) {
if (service != null) {
return service.submit(task);
}
return null;
}
protected DedupEventProcessor<String, Runnable> getAsyncWorkerFromClusterEvent(ClusterEvent event,
AsyncWorkerType workerType) {
Map<AsyncWorkerType, DedupEventProcessor<String, Runnable>> workerPool =
event.getAttribute(AttributeName.AsyncFIFOWorkerPool.name());
if (workerPool != null) {
if (workerPool.containsKey(workerType)) {
return workerPool.get(workerType);
}
}
return null;
}
}