org.apache.kudu.client.ConnectToMasterRequest Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of camel-quarkus-kudu-client
org.apache.kudu:kudu-client with netty package relocations reverted and netty classes stripped away so that camel-quarkus-kudu can use quarkus-netty as a replacement
There is a newer version: 3.15.0
Show newest version
// 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.kudu.client;

import static org.apache.kudu.master.Master.GetMasterRegistrationRequestPB;
import static org.apache.kudu.master.Master.GetMasterRegistrationResponsePB;

import java.util.Collection;
import java.util.Collections;

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

import org.apache.kudu.master.Master.ConnectToMasterResponsePB;
import org.apache.kudu.master.Master.MasterFeatures;
import org.apache.kudu.util.Pair;

/**
 * Package-private RPC that can only go to master.
 */
@InterfaceAudience.Private
public class ConnectToMasterRequest extends KuduRpc {
  /**
   * Kudu 1.2 and earlier use GetMasterRegistration to connect to the master.
   */
  private static final String GET_MASTER_REGISTRATION = "GetMasterRegistration";
  /**
   * Kudu 1.3 and later use a new ConnectToMaster RPC, which includes less
   * irrelevant information and also returns security-related items.
   */
  private static final String CONNECT_TO_MASTER = "ConnectToMaster";

  /**
   * We start by trying the new RPC, but if we fail, we'll retry this
   * RPC with the old RPC.
   */
  private String method = CONNECT_TO_MASTER;

  public ConnectToMasterRequest(KuduTable masterTable,
                                Timer timer,
                                long timeoutMillis) {
    super(masterTable, timer, timeoutMillis);
    // TODO(todd): get rid of 'masterTable' hack
  }

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

  @Override
  String serviceName() {
    return MASTER_SERVICE_NAME;
  }

  @Override
  String method() {
    return method;
  }

  @Override
  Collection getRequiredFeatures() {
    if (CONNECT_TO_MASTER.equals(method)) {
      return Collections.singleton(MasterFeatures.CONNECT_TO_MASTER.getNumber());
    }
    return Collections.emptySet();
  }

  @Override
  Pair deserialize(CallResponse callResponse,
                                                       String tsUUID) throws KuduException {
    if (CONNECT_TO_MASTER.equals(method)) {
      return deserializeNewRpc(callResponse);
    }
    return deserializeOldRpc(callResponse);
  }

  private Pair deserializeNewRpc(
      CallResponse callResponse) {

    final ConnectToMasterResponsePB.Builder respBuilder =
        ConnectToMasterResponsePB.newBuilder();
    readProtobuf(callResponse.getPBMessage(), respBuilder);
    return new Pair(
        respBuilder.build(),
        respBuilder.hasError() ? respBuilder.getError() : null);
  }

  private Pair deserializeOldRpc(
      CallResponse callResponse) {
    final GetMasterRegistrationResponsePB.Builder resp =
        GetMasterRegistrationResponsePB.newBuilder();
    readProtobuf(callResponse.getPBMessage(), resp);

    // Translate to the new RPC result type.
    ConnectToMasterResponsePB.Builder b = ConnectToMasterResponsePB.newBuilder();
    if (resp.hasRole()) {
      b.setRole(resp.getRole());
    }
    if (resp.hasError()) {
      b.setError(resp.getError());
    }
    return new Pair(
        b.build(),
        b.hasError() ? b.getError() : null);
  }

  public void setUseOldMethod() {
    this.method = GET_MASTER_REGISTRATION;
  }
}