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.ambari.server.agent;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.Singleton;
  
  
  /**
   * Captures various agent requests that it sends as part of requests
   */
  
  @Singleton
  public class AgentRequests {
    private static final Logger LOG = LoggerFactory.getLogger(HeartbeatMonitor.class);
    private final Map<String, Map<String, Boolean>> requiresExecCmdDetails = new HashMap<>();
    private final Object _lock = new Object();
  
    /**
     * Creates a holder for agent requests
     */
    public AgentRequests() {
    }
  
    public void setExecutionDetailsRequest(String host, String component, String requestExecutionCmd) {
      if (StringUtils.isNotBlank(requestExecutionCmd)) {
        Map<String, Boolean> perHostRequiresExecCmdDetails = getPerHostRequiresExecCmdDetails(host);
        if (Boolean.TRUE.toString().toUpperCase().equals(requestExecutionCmd.toUpperCase())) {
          LOG.info("Setting need for exec command to " + requestExecutionCmd + " for " + component);
          perHostRequiresExecCmdDetails.put(component, Boolean.TRUE);
        } else {
          perHostRequiresExecCmdDetails.put(component, Boolean.FALSE);
        }
      }
    }
  
    public Boolean shouldSendExecutionDetails(String host, String component) {
  
      Map<String, Boolean> perHostRequiresExecCmdDetails = getPerHostRequiresExecCmdDetails(host);
      if (perHostRequiresExecCmdDetails != null && perHostRequiresExecCmdDetails.containsKey(component)) {
        LOG.debug("Sending exec command details for {}", component);
        return perHostRequiresExecCmdDetails.get(component);
      }
  
      return Boolean.FALSE;
    }
  
    private Map<String, Boolean> getPerHostRequiresExecCmdDetails(String host) {
      if (!requiresExecCmdDetails.containsKey(host)) {
        synchronized (_lock) {
          if (!requiresExecCmdDetails.containsKey(host)) {
            requiresExecCmdDetails.put(host, new HashMap<>());
          }
        }
      }
  
      return requiresExecCmdDetails.get(host);
    }
  
    @Override
    public String toString() {
      return new StringBuilder().append("requiresExecCmdDetails: ").append(requiresExecCmdDetails).toString();
    }
  }
  