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.task.master.metrics;
  
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.alibaba.jstorm.metric.TopologyMetricContext;
  import com.alibaba.jstorm.task.master.TMHandler;
  import com.alibaba.jstorm.task.master.TopologyMaster;
  import com.alibaba.jstorm.task.master.TopologyMasterContext;
  
  import backtype.storm.generated.WorkerUploadMetrics;
  import backtype.storm.tuple.Tuple;
  
  /**
   * updates metric data for topology workers
   */
  @SuppressWarnings("unused")
  public class MetricsUpdater implements TMHandler {
      static private final Logger LOG = LoggerFactory.getLogger(MetricsUpdater.class);
      static private final Logger metricLogger = TopologyMetricContext.LOG;
  
      private TopologyMetricContext topologyMetricContext;
      private TopologyMasterContext tmContext;
  
      @Override
      public void init(TopologyMasterContext tmContext) {
          this.tmContext = tmContext;
          this.topologyMetricContext = tmContext.getTopologyMetricContext();
      }
  
      @Override
      public void process(Object event) {
          Tuple input = (Tuple) event;
          updateMetrics(input);
      }
  
      @Override
      public void cleanup() {
      }
  
      private void updateMetrics(Tuple input) {
          String workerSlot = (String) input.getValueByField(TopologyMaster.FIELD_METRIC_WORKER);
          WorkerUploadMetrics metrics = (WorkerUploadMetrics) input.getValueByField(TopologyMaster.FIELD_METRIC_METRICS);
          topologyMetricContext.addToMemCache(workerSlot, metrics.get_allMetrics());
          metricLogger.info("received metrics from:{}, size:{}", workerSlot, metrics.get_allMetrics().get_metrics_size());
      }
  
  }
  