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.callback.impl;
  
  import java.util.Map;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.alibaba.jstorm.callback.BaseCallback;
  import com.alibaba.jstorm.cluster.StormClusterState;
  import com.alibaba.jstorm.cluster.StormConfig;
  import com.alibaba.jstorm.cluster.StormStatus;
  import com.alibaba.jstorm.daemon.nimbus.NimbusData;
  import com.alibaba.jstorm.schedule.Assignment;
  import com.alibaba.jstorm.schedule.Assignment.AssignmentType;
  
  /**
   * Update user configuration
   *
   * @author Basti.lj
   */
  public class UpdateTopologyTransitionCallback extends BaseCallback {
      private static final Logger LOG = LoggerFactory.getLogger(DelayStatusTransitionCallback.class);
  
      private NimbusData data;
      private String topologyId;
      private StormStatus currentStatus;
  
      public UpdateTopologyTransitionCallback(NimbusData data, String topologyId, StormStatus currentStatus) {
          this.data = data;
          this.topologyId = topologyId;
          this.currentStatus = currentStatus;
      }
  
      @Override
      public <T> Object execute(T... args) {
          StormClusterState clusterState = data.getStormClusterState();
          try {
              Map userConf = (Map) args[0];
              Map topoConf = StormConfig.read_nimbus_topology_conf(topologyId, data.getBlobStore());
              topoConf.putAll(userConf);
              Assignment assignment = clusterState.assignment_info(topologyId, null);
              assignment.setAssignmentType(AssignmentType.UpdateTopology);
              assignment.updateTimeStamp();
              clusterState.set_assignment(topologyId, assignment);
              LOG.info("Successfully updated topology information to ZK for " + topologyId);
          } catch (Exception e) {
              LOG.error("Failed to update topology.", e);
          }
          return currentStatus;
      }
  
  }
  