content: /*
   * 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.
   */
  package org.apache.beam.runners.dataflow.worker.windmill.client.grpc.stubs;
  
  import static org.apache.beam.runners.dataflow.worker.windmill.client.grpc.stubs.WindmillChannels.remoteChannel;
  
  import com.google.auth.Credentials;
  import org.apache.beam.runners.dataflow.options.DataflowWorkerHarnessOptions;
  
  public class WindmillStubFactoryFactoryImpl implements WindmillStubFactoryFactory {
    private final int windmillServiceRpcChannelAliveTimeoutSec;
    private final Credentials gcpCredential;
  
    public WindmillStubFactoryFactoryImpl(DataflowWorkerHarnessOptions workerOptions) {
      this.gcpCredential = workerOptions.getGcpCredential();
      this.windmillServiceRpcChannelAliveTimeoutSec =
          workerOptions.getWindmillServiceRpcChannelAliveTimeoutSec();
    }
  
    @Override
    public WindmillStubFactory makeWindmillStubFactory(boolean useIsolatedChannels) {
      ChannelCache channelCache =
          ChannelCache.create(
              (flowControlSettings, serviceAddress) ->
                  // IsolationChannel will create and manage separate RPC channels to the same
                  // serviceAddress via calling the channelFactory, else just directly return the
                  // RPC channel.
                  useIsolatedChannels
                      ? IsolationChannel.create(
                          () ->
                              remoteChannel(
                                  serviceAddress.getServiceAddress(),
                                  windmillServiceRpcChannelAliveTimeoutSec,
                                  flowControlSettings))
                      : remoteChannel(
                          serviceAddress.getServiceAddress(),
                          windmillServiceRpcChannelAliveTimeoutSec,
                          flowControlSettings));
      return ChannelCachingRemoteStubFactory.create(gcpCredential, channelCache);
    }
  }
  