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.block;
  
  import alluxio.AbstractMasterClient;
  import alluxio.Constants;
  import alluxio.client.block.options.GetWorkerReportOptions;
  import alluxio.grpc.BlockMasterClientServiceGrpc;
  import alluxio.grpc.DecommissionWorkerPOptions;
  import alluxio.grpc.GetBlockInfoPRequest;
  import alluxio.grpc.GetBlockMasterInfoPOptions;
  import alluxio.grpc.GetCapacityBytesPOptions;
  import alluxio.grpc.GetUsedBytesPOptions;
  import alluxio.grpc.GetWorkerInfoListPOptions;
  import alluxio.grpc.GetWorkerLostStoragePOptions;
  import alluxio.grpc.GrpcUtils;
  import alluxio.grpc.RemoveDisabledWorkerPOptions;
  import alluxio.grpc.ServiceType;
  import alluxio.grpc.WorkerLostStorageInfo;
  import alluxio.master.MasterClientContext;
  import alluxio.master.selectionpolicy.MasterSelectionPolicy;
  import alluxio.retry.RetryPolicy;
  import alluxio.wire.BlockInfo;
  import alluxio.wire.BlockMasterInfo;
  import alluxio.wire.BlockMasterInfo.BlockMasterInfoField;
  import alluxio.wire.WorkerInfo;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Set;
  import java.util.function.Supplier;
  import java.util.stream.Collectors;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * A wrapper for the gRPC client to interact with the block master, used by alluxio clients.
   */
  @ThreadSafe
  public final class RetryHandlingBlockMasterClient extends AbstractMasterClient
      implements BlockMasterClient {
    private static final Logger RPC_LOG = LoggerFactory.getLogger(BlockMasterClient.class);
    private BlockMasterClientServiceGrpc.BlockMasterClientServiceBlockingStub mClient = null;
  
    /**
     * Creates a new block master client.
     *
     * @param conf master client configuration
     */
    public RetryHandlingBlockMasterClient(MasterClientContext conf) {
      super(conf);
    }
  
    /**
     * Creates a new block master client.
     *
     * @param conf master client configuration
     * @param address the master address the client connects to
     */
    public RetryHandlingBlockMasterClient(MasterClientContext conf, InetSocketAddress address) {
      super(conf, MasterSelectionPolicy.Factory.specifiedMaster(address));
    }
  
    /**
     * Creates a new block master client.
     *
     * @param conf master client configuration
     * @param address the master address the client connects to
     * @param retryPolicy retry policy to use
     */
    public RetryHandlingBlockMasterClient(
        MasterClientContext conf, InetSocketAddress address,
        Supplier<RetryPolicy> retryPolicy) {
      super(conf, MasterSelectionPolicy.Factory.specifiedMaster(address), retryPolicy);
    }
  
    @Override
    protected ServiceType getRemoteServiceType() {
      return ServiceType.BLOCK_MASTER_CLIENT_SERVICE;
    }
  
    @Override
    protected String getServiceName() {
      return Constants.BLOCK_MASTER_CLIENT_SERVICE_NAME;
    }
  
    @Override
    protected long getServiceVersion() {
      return Constants.BLOCK_MASTER_CLIENT_SERVICE_VERSION;
    }
  
    @Override
    protected void afterConnect() {
      mClient = BlockMasterClientServiceGrpc.newBlockingStub(mChannel);
    }
  
    @Override
    public List<WorkerInfo> getWorkerInfoList() throws IOException {
      return retryRPC(() -> {
        List<WorkerInfo> result = new ArrayList<>();
        for (alluxio.grpc.WorkerInfo workerInfo : mClient
            .getWorkerInfoList(GetWorkerInfoListPOptions.getDefaultInstance())
            .getWorkerInfosList()) {
          result.add(GrpcUtils.fromProto(workerInfo));
        }
        return result;
      }, RPC_LOG, "GetWorkerInfoList", "");
    }
  
    @Override
    public void removeDisabledWorker(RemoveDisabledWorkerPOptions options) throws IOException {
      retryRPC(() -> mClient.removeDisabledWorker(options),
              RPC_LOG, "RemoveDisabledWorker", "");
    }
  
    @Override
    public List<WorkerInfo> getWorkerReport(final GetWorkerReportOptions options)
        throws IOException {
      return retryRPC(() -> {
        List<WorkerInfo> result = new ArrayList<>();
        for (alluxio.grpc.WorkerInfo workerInfo : mClient.getWorkerReport(options.toProto())
            .getWorkerInfosList()) {
          result.add(GrpcUtils.fromProto(workerInfo));
        }
        return result;
      }, RPC_LOG, "GetWorkerReport", "options=%s", options);
    }
  
    @Override
    public List<WorkerLostStorageInfo> getWorkerLostStorage() throws IOException {
      return retryRPC(() -> mClient
          .getWorkerLostStorage(GetWorkerLostStoragePOptions.getDefaultInstance())
          .getWorkerLostStorageInfoList(),
          RPC_LOG, "GetWorkerLostStorage", "");
    }
  
    @Override
    public BlockInfo getBlockInfo(final long blockId) throws IOException {
      return retryRPC(() -> GrpcUtils.fromProto(
          mClient.getBlockInfo(GetBlockInfoPRequest.newBuilder().setBlockId(blockId).build())
              .getBlockInfo()), RPC_LOG, "GetBlockInfo", "blockId=%d", blockId);
    }
  
    @Override
    public BlockMasterInfo getBlockMasterInfo(final Set<BlockMasterInfoField> fields)
        throws IOException {
      return retryRPC(() -> BlockMasterInfo
          .fromProto(mClient.getBlockMasterInfo(GetBlockMasterInfoPOptions.newBuilder()
              .addAllFilters(
                  fields.stream().map(BlockMasterInfoField::toProto).collect(Collectors.toList()))
              .build()).getBlockMasterInfo()), RPC_LOG, "GetBlockMasterInfo", "fields=%s", fields);
    }
  
    @Override
    public long getCapacityBytes() throws IOException {
      return retryRPC(() -> mClient
          .getCapacityBytes(GetCapacityBytesPOptions.getDefaultInstance()).getBytes(),
          RPC_LOG, "GetCapacityBytes", "");
    }
  
    @Override
    public long getUsedBytes() throws IOException {
      return retryRPC(
          () -> mClient.getUsedBytes(GetUsedBytesPOptions.getDefaultInstance()).getBytes(),
          RPC_LOG, "GetUsedBytes", "");
    }
  
    @Override
    public void decommissionWorker(DecommissionWorkerPOptions options) throws IOException {
      retryRPC(() -> mClient.decommissionWorker(options),
          RPC_LOG, "DecommissionWorker", "workerHostName=%s,workerWebPort=%s,options=%s",
          options.getWorkerHostname(), options.getWorkerWebPort(), options);
    }
  }
  