content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * 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.alibaba.otter.shared.arbitrate.impl.setl.memory;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.util.Assert;
  
  import com.alibaba.otter.shared.arbitrate.exception.ArbitrateException;
  import com.alibaba.otter.shared.arbitrate.impl.communication.ArbitrateCommmunicationClient;
  import com.alibaba.otter.shared.arbitrate.impl.config.ArbitrateConfigUtils;
  import com.alibaba.otter.shared.arbitrate.impl.manage.ChannelArbitrateEvent;
  import com.alibaba.otter.shared.arbitrate.impl.setl.ArbitrateFactory;
  import com.alibaba.otter.shared.arbitrate.impl.setl.TerminArbitrateEvent;
  import com.alibaba.otter.shared.arbitrate.impl.setl.zookeeper.termin.WarningTerminProcess;
  import com.alibaba.otter.shared.arbitrate.model.TerminEventData;
  import com.alibaba.otter.shared.arbitrate.model.TerminEventData.TerminType;
  import com.alibaba.otter.shared.common.model.config.channel.Channel;
  import com.alibaba.otter.shared.communication.model.arbitrate.StopChannelEvent;
  
  /**
   * 基于内存版本的termin信号处理
   * 
   * @author jianghang 2012-9-27 下午11:30:13
   * @version 4.1.0
   */
  public class TerminMemoryArbitrateEvent implements TerminArbitrateEvent {
  
      private static final Logger           logger = LoggerFactory.getLogger(TerminMemoryArbitrateEvent.class);
      private ArbitrateCommmunicationClient arbitrateCommmunicationClient;
      private WarningTerminProcess          warningTerminProcess;
      private ChannelArbitrateEvent         channelEvent;
  
      public TerminEventData await(Long pipelineId) throws InterruptedException {
          Assert.notNull(pipelineId);
          MemoryStageController stageController = ArbitrateFactory.getInstance(pipelineId, MemoryStageController.class);
          TerminEventData eventData = stageController.waitTermin();
          if (logger.isDebugEnabled()) {
              logger.debug("## await pipeline[{}] processId[{}] is termin", pipelineId, eventData.getProcessId());
          }
  
          return eventData;
      }
  
      public void exhaust(Long pipelineId) {
          Assert.notNull(pipelineId);
          MemoryStageController stageController = ArbitrateFactory.getInstance(pipelineId, MemoryStageController.class);
          int size = stageController.sizeTermin();
          try {
              for (int i = 0; i < size; i++) {
                  TerminEventData data = stageController.waitTermin();
                  ack(data);
              }
          } catch (InterruptedException e) {
              throw new ArbitrateException(e);
          }
      }
  
      public void single(TerminEventData data) {
          // 正向处理
          final TerminType type = data.getType();
          MemoryStageController stageController = ArbitrateFactory.getInstance(data.getPipelineId(),
                                                                               MemoryStageController.class);
          if (type.isNormal()) {
              Assert.notNull(data.getProcessId());
              stageController.offerTermin(data);
          } else if (type.isWarning()) {
              warningTerminProcess.process(data); // warn单独处理，不需要关闭相关的pipeline
          } else {
              // 内存版可以简化处理rollback/restart/shutdown模型，不需要进行process的termin操作处理
              Channel channel = ArbitrateConfigUtils.getChannel(data.getPipelineId());
              if (data.getType().isRollback()) {
                  boolean paused = channelEvent.pause(channel.getId(), false);
                  if (paused) {// 如果pause成功，则发送报警信息
                      warningTerminProcess.process(data);
                  }
              } else if (data.getType().isShutdown()) {
                  boolean shutdowned = channelEvent.stop(channel.getId(), false);
                  // 发送报警信息
                  if (shutdowned) {
                      warningTerminProcess.process(data);
                  }
                  // 发送关闭命令给manager
                  StopChannelEvent event = new StopChannelEvent();
                  event.setChannelId(channel.getId());
                  arbitrateCommmunicationClient.callManager(event);
              } else if (data.getType().isRestart()) {
                  boolean restarted = channelEvent.restart(channel.getId(), false);
                  // 发送报警信息
                  if (restarted) {
                      warningTerminProcess.process(data);
                  }
              }
  
              stageController.termin(data.getType());// 内存中构造异常termin信号返回
          }
  
      }
  
      public void ack(TerminEventData data) {
          MemoryStageController stageController = ArbitrateFactory.getInstance(data.getPipelineId(),
                                                                               MemoryStageController.class);
          stageController.ackTermin(data);
      }
  
      public int size(Long pipelineId) {
          MemoryStageController stageController = ArbitrateFactory.getInstance(pipelineId, MemoryStageController.class);
          return stageController.sizeTermin();
      }
  
      // ================== setter / getter ===================
      public void setArbitrateCommmunicationClient(ArbitrateCommmunicationClient arbitrateCommmunicationClient) {
          this.arbitrateCommmunicationClient = arbitrateCommmunicationClient;
      }
  
      public void setWarningTerminProcess(WarningTerminProcess warningTerminProcess) {
          this.warningTerminProcess = warningTerminProcess;
      }
  
      public void setChannelEvent(ChannelArbitrateEvent channelEvent) {
          this.channelEvent = channelEvent;
      }
  
  }
  