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// 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
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package org.apache.kudu.client;

import static org.apache.kudu.master.Master.ListTabletServersRequestPB;
import static org.apache.kudu.master.Master.ListTabletServersResponsePB;

import java.util.ArrayList;
import java.util.List;

import com.google.protobuf.Message;
import io.netty.util.Timer;
import org.apache.yetus.audience.InterfaceAudience;

import org.apache.kudu.util.Pair;

@InterfaceAudience.Private
public class ListTabletServersRequest extends KuduRpc {

  public ListTabletServersRequest(KuduTable masterTable,
                                  Timer timer,
                                  long timeoutMillis) {
    super(masterTable, timer, timeoutMillis);
  }

  @Override
  Message createRequestPB() {
    return ListTabletServersRequestPB.getDefaultInstance();
  }

  @Override
  String serviceName() {
    return MASTER_SERVICE_NAME;
  }

  @Override
  String method() {
    return "ListTabletServers";
  }

  @Override
  Pair deserialize(CallResponse callResponse,
                                                      String tsUUID) throws KuduException {
    final ListTabletServersResponsePB.Builder respBuilder =
        ListTabletServersResponsePB.newBuilder();
    readProtobuf(callResponse.getPBMessage(), respBuilder);
    int serversCount = respBuilder.getServersCount();
    List servers = new ArrayList<>(serversCount);
    for (ListTabletServersResponsePB.Entry entry : respBuilder.getServersList()) {
      servers.add(entry.getRegistration().getRpcAddresses(0).getHost());
    }
    ListTabletServersResponse response =
        new ListTabletServersResponse(timeoutTracker.getElapsedMillis(),
                                      tsUUID,
                                      serversCount,
                                      servers);
    return new Pair(
        response, respBuilder.hasError() ? respBuilder.getError() : null);
  }
}




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