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 org.apache.asterix.active.message;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.asterix.common.dataflow.ICcApplicationContext;
  import org.apache.asterix.common.messaging.api.ICCMessageBroker;
  import org.apache.asterix.common.messaging.api.ICCMessageBroker.ResponseState;
  import org.apache.asterix.common.messaging.api.ICcAddressedMessage;
  import org.apache.asterix.common.messaging.api.INcResponse;
  import org.apache.commons.lang3.tuple.MutablePair;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  public class ActiveStatsResponse implements ICcAddressedMessage, INcResponse {
  
      private static final long serialVersionUID = 1L;
      private final long reqId;
      private final String stats;
      private final Exception failure;
  
      public ActiveStatsResponse(long reqId, String stats, Exception failure) {
          this.reqId = reqId;
          this.stats = stats;
          this.failure = failure;
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public void setResult(MutablePair<ResponseState, Object> result) {
          ResponseState responseState = result.getLeft();
          if (failure != null) {
              result.setLeft(ResponseState.FAILURE);
              result.setRight(failure);
              return;
          }
          switch (responseState) {
              case UNINITIALIZED:
                  // First to arrive
                  result.setRight(new ArrayList<String>());
                  // No failure, change state to success
                  result.setLeft(ResponseState.SUCCESS);
                  // Fallthrough
              case SUCCESS:
                  List<String> response = (List<String>) result.getRight();
                  response.add(stats);
                  break;
              default:
                  break;
  
          }
      }
  
      @Override
      public void handle(ICcApplicationContext appCtx) throws HyracksDataException, InterruptedException {
          ICCMessageBroker broker = (ICCMessageBroker) appCtx.getServiceContext().getMessageBroker();
          broker.respond(reqId, this);
      }
  
      @Override
      public boolean isWhispered() {
          return true;
      }
  }
  