org.apache.drill.exec.rpc.control.ControlConnection Maven / Gradle / Ivy

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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 "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.drill.exec.rpc.control;

import io.netty.buffer.ByteBuf;
import io.netty.channel.socket.SocketChannel;

import java.util.UUID;

import org.apache.drill.exec.memory.BufferAllocator;
import org.apache.drill.exec.proto.BitControl.RpcType;
import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
import org.apache.drill.exec.rpc.RemoteConnection;
import org.apache.drill.exec.rpc.RpcBus;
import org.apache.drill.exec.rpc.RpcOutcomeListener;

import com.google.protobuf.MessageLite;

public class ControlConnection extends RemoteConnection {
  static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ControlConnection.class);

  private final RpcBus bus;
  private final BufferAllocator allocator;
  private volatile DrillbitEndpoint endpoint;
  private volatile boolean active = false;
  private final UUID id;

  public ControlConnection(String name, SocketChannel channel, RpcBus bus,
      BufferAllocator allocator) {
    super(channel, name);
    this.bus = bus;
    this.id = UUID.randomUUID();
    this.allocator = allocator;
  }

  void setEndpoint(DrillbitEndpoint endpoint) {
    assert this.endpoint == null : "Endpoint should only be set once (only in the case in incoming server requests).";
    this.endpoint = endpoint;
    active = true;
  }

  protected DrillbitEndpoint getEndpoint() {
    return endpoint;
  }

  public  void send(RpcOutcomeListener outcomeListener,
      RpcType rpcType, SEND protobufBody, Class clazz, ByteBuf... dataBodies) {
    bus.send(outcomeListener, this, rpcType, protobufBody, clazz, dataBodies);
  }

  public  void sendUnsafe(RpcOutcomeListener outcomeListener,
      RpcType rpcType, SEND protobufBody, Class clazz, ByteBuf... dataBodies) {
    bus.send(outcomeListener, this, rpcType, protobufBody, clazz, true, dataBodies);
  }

  public void disable() {
    active = false;
  }

  @Override
  public boolean isActive() {
    return active;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((id == null) ? 0 : id.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    ControlConnection other = (ControlConnection) obj;
    if (id == null) {
      if (other.id != null) {
        return false;
      }
    } else if (!id.equals(other.id)) {
      return false;
    }
    return true;
  }

  @Override
  public BufferAllocator getAllocator() {
    return allocator;
  }

}