content: /**
   * 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.
   */
  package com.alibaba.jstorm.daemon.worker.timer;
  
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.concurrent.ScheduledFuture;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.commons.lang.builder.ToStringBuilder;
  import org.apache.commons.lang.builder.ToStringStyle;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import backtype.storm.utils.DisruptorQueue;
  
  import com.lmax.disruptor.InsufficientCapacityException;
  
  public class TimerTrigger implements Runnable {
      private static final Logger LOG = LoggerFactory.getLogger(TimerTrigger.class);
  
      private static ScheduledExecutorService threadPool;
  
      public static void setScheduledExecutorService(ScheduledExecutorService scheduledExecutorService) {
          threadPool = scheduledExecutorService;
      }
  
      protected String name;
      protected int opCode;
      protected int firstTime;
      protected int frequency;
      protected DisruptorQueue queue = null;
      protected Object object;
      protected boolean block = true;
      private ScheduledFuture<?> future;
  
      public void register() {
          register(TimeUnit.SECONDS);
      }
  
      public void register(TimeUnit timeUnit) {
          future = threadPool.scheduleAtFixedRate(this, firstTime, frequency, timeUnit);
          LOG.info("Successfully register timer " + this);
      }
  
      public void unregister() {
          if (future != null) {
              future.cancel(true);
          }
      }
  
      public void updateObject() {
      }
  
      @Override
      public void run() {
          try {
              updateObject();
  
              if (object == null) {
                  LOG.info("Timer " + name + " 's object is null ");
                  return;
              }
  
              TimerEvent event = new TimerEvent(opCode, object);
              queue.publish(event, block);
          } catch (InsufficientCapacityException e) {
              LOG.warn("Failed to publish timer event to " + name);
              return;
          } catch (Exception e) {
              LOG.warn("Failed to publish timer event to " + name, e);
              return;
          }
  
          LOG.debug("Trigger timer event to " + name);
      }
  
      public String getName() {
          return name;
      }
  
      public void setName(String name) {
          this.name = name;
      }
  
      public int getOpCode() {
          return opCode;
      }
  
      public void setOpCode(int opCode) {
          this.opCode = opCode;
      }
  
      public int getFirstTime() {
          return firstTime;
      }
  
      public void setFirstTime(int firstTime) {
          this.firstTime = firstTime;
      }
  
      public int getFrequency() {
          return frequency;
      }
  
      public void setFrequency(int frequency) {
          this.frequency = frequency;
      }
  
      public DisruptorQueue getQueue() {
          return queue;
      }
  
      public void setQueue(DisruptorQueue queue) {
          this.queue = queue;
      }
  
      public Object getObject() {
          return object;
      }
  
      public void setObject(Object object) {
          this.object = object;
      }
  
      public boolean isBlock() {
          return block;
      }
  
      public void setBlock(boolean block) {
          this.block = block;
      }
  
      @Override
      public String toString() {
          return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
      }
  
      public class TimerEvent {
          private int opCode;
          private Object msg;
  
          public TimerEvent(int opCode, Object msg) {
              this.opCode = opCode;
              this.msg = msg;
          }
  
          public int getOpCode() {
              return opCode;
          }
  
          public Object getMsg() {
              return msg;
          }
      }
  }
  