| 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.ArrayList; |
| import java.util.List; |
| |
| import org.apache.helix.controller.stages.AttributeName; |
| import org.apache.helix.controller.stages.ClusterEvent; |
| import org.apache.helix.monitoring.mbeans.ClusterStatusMonitor; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class Pipeline { |
| private static final Logger logger = LoggerFactory.getLogger(Pipeline.class.getName()); |
| private final String _pipelineType; |
| List<Stage> _stages; |
| |
| public enum Type { |
| DEFAULT, |
| TASK |
| } |
| |
| public Pipeline() { |
| this(""); |
| } |
| |
| public Pipeline(String pipelineType) { |
| _stages = new ArrayList<>(); |
| _pipelineType = pipelineType; |
| } |
| |
| public void addStage(Stage stage) { |
| _stages.add(stage); |
| StageContext context = null; |
| stage.init(context); |
| } |
| |
| public String getPipelineType() { |
| return _pipelineType; |
| } |
| |
| public void handle(ClusterEvent event) throws Exception { |
| if (_stages == null) { |
| return; |
| } |
| for (Stage stage : _stages) { |
| long startTime = System.currentTimeMillis(); |
| |
| stage.preProcess(); |
| stage.process(event); |
| stage.postProcess(); |
| |
| long endTime = System.currentTimeMillis(); |
| long duration = endTime - startTime; |
| logger.info(String.format("END %s for %s pipeline for cluster %s. took: %d ms for event %s", |
| stage.getStageName(), _pipelineType, event.getClusterName(), duration, |
| event.getEventId())); |
| |
| ClusterStatusMonitor clusterStatusMonitor = |
| event.getAttribute(AttributeName.clusterStatusMonitor.name()); |
| if (clusterStatusMonitor != null) { |
| clusterStatusMonitor.updateClusterEventDuration(stage.getStageName(), duration); |
| } |
| } |
| } |
| |
| public void finish() { |
| |
| } |
| |
| public List<Stage> getStages() { |
| return _stages; |
| } |
| |
| } |