text: #!/usr/bin/python
  """
  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.
  
  """
  
  import sys
  import os
  
  from resource_management.libraries.script.script import Script
  from resource_management.libraries.functions import conf_select
  from resource_management.libraries.functions import stack_select
  from resource_management.libraries.functions.copy_tarball import copy_to_hdfs
  from resource_management.libraries.functions.check_process_status import check_process_status
  from resource_management.libraries.functions.stack_features import check_stack_feature
  from resource_management.libraries.functions import StackFeature
  from resource_management.core.logger import Logger
  from resource_management.core import shell
  from setup_spark import *
  from spark_service import spark_service
  
  
  class JobHistoryServer(Script):
  
    def install(self, env):
      import params
      env.set_params(params)
      
      self.install_packages(env)
      
    def configure(self, env, upgrade_type=None, config_dir=None):
      import params
      env.set_params(params)
      
      setup_spark(env, 'server', upgrade_type=upgrade_type, action = 'config')
      
    def start(self, env, upgrade_type=None):
      import params
      env.set_params(params)
      
      self.configure(env)
      spark_service('jobhistoryserver', upgrade_type=upgrade_type, action='start')
  
    def stop(self, env, upgrade_type=None):
      import params
      env.set_params(params)
      
      spark_service('jobhistoryserver', upgrade_type=upgrade_type, action='stop')
  
    def status(self, env):
      import status_params
      env.set_params(status_params)
  
      check_process_status(status_params.spark_history_server_pid_file)
      
  
    def get_component_name(self):
      return "spark2-historyserver"
  
    def pre_upgrade_restart(self, env, upgrade_type=None):
      import params
  
      env.set_params(params)
      if params.version and check_stack_feature(StackFeature.ROLLING_UPGRADE, params.version):
        Logger.info("Executing Spark2 Job History Server Stack Upgrade pre-restart")
        conf_select.select(params.stack_name, "spark2", params.version)
        stack_select.select("spark2-historyserver", params.version)
  
        # Spark 1.3.1.2.3, and higher, which was included in HDP 2.3, does not have a dependency on Tez, so it does not
        # need to copy the tarball, otherwise, copy it.
        if params.version and check_stack_feature(StackFeature.TEZ_FOR_SPARK, params.version):
          resource_created = copy_to_hdfs(
            "tez",
            params.user_group,
            params.hdfs_user,
            skip=params.sysprep_skip_copy_tarballs_hdfs)
          if resource_created:
            params.HdfsResource(None, action="execute")
            
    def get_log_folder(self):
      import params
      return params.spark_log_dir
    
    def get_user(self):
      import params
      return params.spark_user
  
  if __name__ == "__main__":
    JobHistoryServer().execute()
  