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 storm.trident.operation;
  
  import backtype.storm.metric.api.CombinedMetric;
  import backtype.storm.metric.api.ICombiner;
  import backtype.storm.metric.api.IMetric;
  import backtype.storm.metric.api.IReducer;
  import backtype.storm.metric.api.ReducedMetric;
  import backtype.storm.task.IMetricsContext;
  import backtype.storm.task.TopologyContext;
  import backtype.storm.tuple.Fields;
  import storm.trident.tuple.TridentTuple;
  import storm.trident.tuple.TridentTupleView.ProjectionFactory;
  
  public class TridentOperationContext implements IMetricsContext {
      TridentTuple.Factory _factory;
      TopologyContext _topoContext;
  
      public TridentOperationContext(TopologyContext topoContext, TridentTuple.Factory factory) {
          _factory = factory;
          _topoContext = topoContext;
      }
  
      public TridentOperationContext(TridentOperationContext parent, TridentTuple.Factory factory) {
          this(parent._topoContext, factory);
      }
  
      public ProjectionFactory makeProjectionFactory(Fields fields) {
          return new ProjectionFactory(_factory, fields);
      }
  
      public int numPartitions() {
          return _topoContext.getComponentTasks(_topoContext.getThisComponentId()).size();
      }
  
      public int getPartitionIndex() {
          return _topoContext.getThisTaskIndex();
      }
  
      public <T extends IMetric> T registerMetric(String name, T metric, int timeBucketSizeInSecs) {
          return _topoContext.registerMetric(name, metric, timeBucketSizeInSecs);
      }
  
      public ReducedMetric registerMetric(String name, IReducer reducer, int timeBucketSizeInSecs) {
          return _topoContext.registerMetric(name, new ReducedMetric(reducer), timeBucketSizeInSecs);
      }
  
      public CombinedMetric registerMetric(String name, ICombiner combiner, int timeBucketSizeInSecs) {
          return _topoContext.registerMetric(name, new CombinedMetric(combiner), timeBucketSizeInSecs);
      }
  }
  