code: @SuppressWarnings("serial") @Test public void testCreateActions() throws Exception {
    clusters.addCluster("c1");
    clusters.getCluster("c1").setDesiredStackVersion(new StackId("HDP-0.1"));
    clusters.addHost("h1");
    clusters.getHost("h1").setOsType("centos5");
    clusters.getHost("h1").persist();
    clusters.addHost("h2");
    clusters.getHost("h2").setOsType("centos5");
    clusters.getHost("h2").persist();
    Set<String> hostNames=new HashSet<String>(){
  {
        add("h1");
        add("h2");
      }
    }
  ;
    clusters.mapHostsToCluster(hostNames,"c1");
    Cluster cluster=clusters.getCluster("c1");
    cluster.setDesiredStackVersion(new StackId("HDP-0.1"));
    Service hdfs=cluster.addService("HDFS");
    Service mapReduce=cluster.addService("MAPREDUCE");
    hdfs.persist();
    mapReduce.persist();
    hdfs.addServiceComponent(Role.HDFS_CLIENT.name()).persist();
    mapReduce.addServiceComponent(Role.MAPREDUCE_CLIENT.name()).persist();
    hdfs.getServiceComponent(Role.HDFS_CLIENT.name()).addServiceComponentHost("h1").persist();
    mapReduce.getServiceComponent(Role.MAPREDUCE_CLIENT.name()).addServiceComponentHost("h2").persist();
    Set<ActionRequest> actionRequests=new HashSet<ActionRequest>();
    Map<String,String> params=new HashMap<String,String>(){
  {
        put("test","test");
      }
    }
  ;
    ActionRequest actionRequest=new ActionRequest("c1","HDFS",Role.HDFS_SERVICE_CHECK.name(),params);
    actionRequests.add(actionRequest);
    RequestStatusResponse response=controller.createActions(actionRequests);
    assertEquals(1,response.getTasks().size());
    ShortTaskStatus task=response.getTasks().get(0);
    List<HostRoleCommand> storedTasks=actionDB.getRequestTasks(response.getRequestId());
    assertEquals(1,storedTasks.size());
    HostRoleCommand hostRoleCommand=storedTasks.get(0);
    assertEquals(task.getTaskId(),hostRoleCommand.getTaskId());
    assertEquals(actionRequest.getServiceName(),hostRoleCommand.getExecutionCommandWrapper().getExecutionCommand().getServiceName());
    assertEquals(actionRequest.getClusterName(),hostRoleCommand.getExecutionCommandWrapper().getExecutionCommand().getClusterName());
    assertEquals(actionRequest.getActionName(),hostRoleCommand.getExecutionCommandWrapper().getExecutionCommand().getRole().name());
    assertEquals(Role.HDFS_CLIENT.name(),hostRoleCommand.getEvent().getEvent().getServiceComponentName());
    assertEquals(actionRequest.getParameters(),hostRoleCommand.getExecutionCommandWrapper().getExecutionCommand().getRoleParams());
    actionRequests.add(new ActionRequest("c1","MAPREDUCE",Role.MAPREDUCE_SERVICE_CHECK.name(),null));
    response=controller.createActions(actionRequests);
    assertEquals(2,response.getTasks().size());
    List<HostRoleCommand> tasks=actionDB.getRequestTasks(response.getRequestId());
    assertEquals(2,tasks.size());
  }
  