github.com/apache/beam/sdks/v2@v2.48.2/python/apache_beam/runners/worker/channel_factory.py (about)

     1  #
     2  # Licensed to the Apache Software Foundation (ASF) under one or more
     3  # contributor license agreements.  See the NOTICE file distributed with
     4  # this work for additional information regarding copyright ownership.
     5  # The ASF licenses this file to You under the Apache License, Version 2.0
     6  # (the "License"); you may not use this file except in compliance with
     7  # the License.  You may obtain a copy of the License at
     8  #
     9  #    http://www.apache.org/licenses/LICENSE-2.0
    10  #
    11  # Unless required by applicable law or agreed to in writing, software
    12  # distributed under the License is distributed on an "AS IS" BASIS,
    13  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  # See the License for the specific language governing permissions and
    15  # limitations under the License.
    16  #
    17  
    18  """Factory to create grpc channel."""
    19  # pytype: skip-file
    20  
    21  import grpc
    22  
    23  
    24  class GRPCChannelFactory(grpc.StreamStreamClientInterceptor):
    25    DEFAULT_OPTIONS = [
    26        ("grpc.keepalive_time_ms", 20000),
    27        ("grpc.keepalive_timeout_ms", 300000),
    28    ]
    29  
    30    def __init__(self):
    31      pass
    32  
    33    @staticmethod
    34    def insecure_channel(target, options=None):
    35      if options is None:
    36        options = []
    37      return grpc.insecure_channel(
    38          target, options=options + GRPCChannelFactory.DEFAULT_OPTIONS)
    39  
    40    @staticmethod
    41    def secure_channel(target, credentials, options=None):
    42      if options is None:
    43        options = []
    44      return grpc.secure_channel(
    45          target,
    46          credentials,
    47          options=options + GRPCChannelFactory.DEFAULT_OPTIONS)