text: """
  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.
  
    The following file from the Ambari 2.6 branch titan service was used as a template:
    https://github.com/apache/ambari/blob/branch-2.6/ambari-server/src/main/resources/common-services/TITAN/1.0.0/package/alerts/alert_check_titan_server.py
  """
  
  from resource_management.core.resources import Execute
  from ambari_commons.os_family_impl import OsFamilyFuncImpl, OsFamilyImpl
  from resource_management.libraries.functions import format
  
  RESULT_CODE_OK = 'OK'
  RESULT_CODE_CRITICAL = 'CRITICAL'
  RESULT_CODE_UNKNOWN = 'UNKNOWN'
  STACK_ROOT = 'janusgraph.install.dir'
  JANUSGRAPH_RUN_DIR = 'janusgraph.run.dir'
  JANUSGRAPH_USER = 'janusgraph.user'
  @OsFamilyFuncImpl(os_family=OsFamilyImpl.DEFAULT)
  def execute(configurations={}, parameters={}, host_name=None):
    """
    Returns a tuple containing the result code and a pre-formatted result label
  
    Keyword arguments:
    configurations (dictionary): a mapping of configuration key to value
    parameters (dictionary): a mapping of script parameter key to value
    host_name (string): the name of this host where the alert is running
    """
    janusgraph_bin_dir = configurations[STACK_ROOT] + format("/bin")
    gremlin_server_script_path = janusgraph_bin_dir + format("/gremlin-server-script.sh")
    janusgraph_pid_file = parameters[JANUSGRAPH_RUN_DIR] + format("/janusgraph.pid")
    janusgraph_user = parameters[JANUSGRAPH_USER]
    (code, msg) = get_check_result(gremlin_server_script_path, janusgraph_pid_file, janusgraph_user)
    return (code, msg)
  
  @OsFamilyFuncImpl(os_family=OsFamilyImpl.DEFAULT)
  def get_tokens():
    """
    Returns a tuple of tokens in the format {{site/property}} that will be used
    to build the dictionary passed into execute
    """
    return (STACK_ROOT, JANUSGRAPH_RUN_DIR)
  
  def get_check_result(gremlin_server_script_path, janusgraph_pid_file, janusgraph_user):
    cmd = format("{gremlin_server_script_path} status {janusgraph_pid_file}")
    try:
      result = Execute(cmd,
                       user=janusgraph_user
                       )
      return (RESULT_CODE_OK, ["janusgraph server is up and running"])
    except Exception, ex:
      return (RESULT_CODE_CRITICAL, [ex])
  
  