content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.grpc;
  
  import com.google.common.base.MoreObjects;
  
  import java.util.Objects;
  import java.util.UUID;
  
  /**
   * Used to define a key for {@link GrpcChannelPool}.
   */
  public class GrpcChannelKey {
    private final GrpcNetworkGroup mNetworkGroup;
    private final GrpcServerAddress mServerAddress;
  
    /** Unique channel identifier. */
    private final UUID mChannelId = UUID.randomUUID();
    private final int mGroupIndex;
  
    /**
     * Constructor.
     * @param networkGroup network group
     * @param serverAddress server address
     * @param groupIndex the order of channel in slots that are allocated for its network group
     */
    protected GrpcChannelKey(GrpcNetworkGroup networkGroup,
        GrpcServerAddress serverAddress, int groupIndex) {
      mNetworkGroup = Objects.requireNonNull(networkGroup, "networkGroup is null");
      mServerAddress = Objects.requireNonNull(serverAddress, "serverAddress is null");
      mGroupIndex = groupIndex;
    }
  
    /**
     * @return unique identifier for the channel
     */
    public UUID getChannelId() {
      return mChannelId;
    }
  
    /**
     * @return destination address of the channel
     */
    public GrpcServerAddress getServerAddress() {
      return mServerAddress;
    }
  
    /**
     * @return the network group
     */
    public GrpcNetworkGroup getNetworkGroup() {
      return mNetworkGroup;
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
  
      GrpcChannelKey other = (GrpcChannelKey) o;
      return mNetworkGroup.equals(other.mNetworkGroup)
          && mServerAddress.equals(other.mServerAddress)
          && mGroupIndex == other.mGroupIndex;
    }
  
    @Override
    public int hashCode() {
      return Objects.hash(mNetworkGroup, mServerAddress, mGroupIndex);
    }
  
    @Override
    public String toString() {
      return MoreObjects.toStringHelper(this)
          .add("NetworkGroup", mNetworkGroup)
          .add("ServerAddress", mServerAddress)
          .add("GroupIndex", mGroupIndex)
          .add("ChannelId", mChannelId)
          .toString();
    }
  }
  