org.apache.drill.exec.rpc.control.ControlConnection.java Source code

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Here is the source code for org.apache.drill.exec.rpc.control.ControlConnection.java

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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.common.io.Closeables;
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<RpcType, ControlConnection> 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<RpcType, ControlConnection> 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 <SEND extends MessageLite, RECEIVE extends MessageLite> void send(
            RpcOutcomeListener<RECEIVE> outcomeListener, RpcType rpcType, SEND protobufBody, Class<RECEIVE> clazz,
            ByteBuf... dataBodies) {
        bus.send(outcomeListener, this, rpcType, protobufBody, clazz, dataBodies);
    }

    public <SEND extends MessageLite, RECEIVE extends MessageLite> void sendUnsafe(
            RpcOutcomeListener<RECEIVE> outcomeListener, RpcType rpcType, SEND protobufBody, Class<RECEIVE> 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;
    }

    public void shutdownIfClient() {
        if (bus.isClient()) {
            Closeables.closeQuietly(bus);
        }
    }

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

}