public String getTargetService() {
    return targetService;
  }
Create an instance of ActionDefinition

@param actionName      The name of the action
@param actionType      The type fo the action
@param inputs          Expected input of the action
@param targetService   Target service type (e.g. HDFS)
@param targetComponent Target component type (e.g. DATANODE)
@param description     Short description of the action
@param targetType      Selection criteria for target hosts
@param defaultTimeout  The timeout value for this action when executed
@param permissions     A set of permissions to use when verifiying authorization to execute this action
ambari-server/src/main/java/org/apache/ambari/server/customactions/ActionDefinition.java