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;
  
  import com.google.auto.value.AutoOneOf;
  import com.google.auto.value.AutoValue;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.net.HostAndPort;
  
  /** Used to create channels to communicate with Streaming Engine via gRpc. */
  @AutoOneOf(WindmillServiceAddress.Kind.class)
  public abstract class WindmillServiceAddress {
  
    public static WindmillServiceAddress create(HostAndPort gcpServiceAddress) {
      return AutoOneOf_WindmillServiceAddress.gcpServiceAddress(gcpServiceAddress);
    }
  
    public static WindmillServiceAddress create(
        AuthenticatedGcpServiceAddress authenticatedGcpServiceAddress) {
      return AutoOneOf_WindmillServiceAddress.authenticatedGcpServiceAddress(
          authenticatedGcpServiceAddress);
    }
  
    public abstract Kind getKind();
  
    public abstract HostAndPort gcpServiceAddress();
  
    public abstract AuthenticatedGcpServiceAddress authenticatedGcpServiceAddress();
  
    public final HostAndPort getServiceAddress() {
      return getKind() == WindmillServiceAddress.Kind.GCP_SERVICE_ADDRESS
          ? gcpServiceAddress()
          : authenticatedGcpServiceAddress().gcpServiceAddress();
    }
  
    public enum Kind {
      GCP_SERVICE_ADDRESS,
      AUTHENTICATED_GCP_SERVICE_ADDRESS
    }
  
    @AutoValue
    public abstract static class AuthenticatedGcpServiceAddress {
  
      public static AuthenticatedGcpServiceAddress create(
          String authenticatingService, HostAndPort gcpServiceAddress) {
        // HostAndPort supports IpV6.
        return new AutoValue_WindmillServiceAddress_AuthenticatedGcpServiceAddress(
            authenticatingService, gcpServiceAddress);
      }
  
      public abstract String authenticatingService();
  
      public abstract HostAndPort gcpServiceAddress();
    }
  }
  