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.client.journal;
  
  import alluxio.AbstractJobMasterClient;
  import alluxio.Constants;
  import alluxio.exception.status.AlluxioStatusException;
  import alluxio.grpc.GetQuorumInfoPRequest;
  import alluxio.grpc.GetQuorumInfoPResponse;
  import alluxio.grpc.GetTransferLeaderMessagePRequest;
  import alluxio.grpc.GetTransferLeaderMessagePResponse;
  import alluxio.grpc.JournalMasterClientServiceGrpc;
  import alluxio.grpc.NetAddress;
  import alluxio.grpc.RemoveQuorumServerPRequest;
  import alluxio.grpc.ResetPrioritiesPRequest;
  import alluxio.grpc.ServiceType;
  import alluxio.grpc.TransferLeadershipPRequest;
  import alluxio.master.MasterClientContext;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A wrapper for the gRPC client to interact with the journal master, used by alluxio clients.
   * It would talk to both JobMaster and Master, so it should inherit AbstractJobMasterClient
   */
  public class RetryHandlingJournalMasterClient extends AbstractJobMasterClient
      implements JournalMasterClient {
    private static final Logger RPC_LOG = LoggerFactory.getLogger(JournalMasterClient.class);
    private JournalMasterClientServiceGrpc.JournalMasterClientServiceBlockingStub mClient = null;
  
    /**
     * Creates a new journal master client.
     *
     * @param conf master client configuration
     */
    public RetryHandlingJournalMasterClient(MasterClientContext conf) {
      super(conf);
    }
  
    @Override
    protected ServiceType getRemoteServiceType() {
      return ServiceType.JOURNAL_MASTER_CLIENT_SERVICE;
    }
  
    @Override
    protected String getServiceName() {
      return Constants.JOURNAL_MASTER_CLIENT_SERVICE_NAME;
    }
  
    @Override
    protected long getServiceVersion() {
      return Constants.JOURNAL_MASTER_CLIENT_SERVICE_VERSION;
    }
  
    @Override
    protected void afterConnect() {
      mClient = JournalMasterClientServiceGrpc.newBlockingStub(mChannel);
    }
  
    @Override
    public GetQuorumInfoPResponse getQuorumInfo() throws AlluxioStatusException {
      return retryRPC(() -> mClient.getQuorumInfo(GetQuorumInfoPRequest.getDefaultInstance()),
          RPC_LOG, "GetQuorumInfo",  "");
    }
  
    @Override
    public void removeQuorumServer(NetAddress serverAddress) throws AlluxioStatusException {
      retryRPC(() -> mClient.removeQuorumServer(
          RemoveQuorumServerPRequest.newBuilder().setServerAddress(serverAddress).build()),
          RPC_LOG, "RemoveQuorumServer",  "serverAddress=%s", serverAddress);
    }
  
    @Override
    public String transferLeadership(NetAddress newLeaderNetAddress) throws AlluxioStatusException {
      return retryRPC(() -> mClient.transferLeadership(
          TransferLeadershipPRequest.newBuilder()
          .setServerAddress(newLeaderNetAddress).build()).getTransferId(),
          RPC_LOG, "TransferLeadership", "serverAddress=%s", newLeaderNetAddress);
    }
  
    @Override
    public void resetPriorities() throws AlluxioStatusException {
      retryRPC(() -> mClient.resetPriorities(ResetPrioritiesPRequest.getDefaultInstance()),
              RPC_LOG, "ResetPriorities", "");
    }
  
    @Override
    public GetTransferLeaderMessagePResponse getTransferLeaderMessage(String transferId)
            throws AlluxioStatusException {
      return retryRPC(() ->
          mClient.getTransferLeaderMessage(
             GetTransferLeaderMessagePRequest.newBuilder().setTransferId(transferId).build()),
          RPC_LOG, "GetTransferLeaderMessage",  "");
    }
  }
  