org.apache.drill.exec.rpc.bit.BitConnection.java Source code

Introduction

Here is the source code for org.apache.drill.exec.rpc.bit.BitConnection.java

Source

/**
 * 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.bit;

import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.util.concurrent.GenericFutureListener;

import java.util.UUID;
import java.util.concurrent.ConcurrentMap;

import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
import org.apache.drill.exec.proto.ExecProtos.FragmentHandle;
import org.apache.drill.exec.proto.ExecProtos.FragmentStatus;
import org.apache.drill.exec.proto.ExecProtos.PlanFragment;
import org.apache.drill.exec.proto.ExecProtos.RpcType;
import org.apache.drill.exec.proto.GeneralRPCProtos.Ack;
import org.apache.drill.exec.record.FragmentWritableBatch;
import org.apache.drill.exec.rpc.DrillRpcFuture;
import org.apache.drill.exec.rpc.RemoteConnection;
import org.apache.drill.exec.rpc.RpcBus;
import org.apache.drill.exec.rpc.RpcConnectionHandler;
import org.apache.drill.exec.rpc.RpcOutcomeListener;

import com.google.common.base.Preconditions;
import com.google.common.io.Closeables;
import com.google.protobuf.MessageLite;

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

    private final RpcBus<RpcType, BitConnection> bus;
    private final ListenerPool listeners;
    private volatile DrillbitEndpoint endpoint;
    private volatile boolean active = false;
    private final UUID id;

    public BitConnection(Channel channel, RpcBus<RpcType, BitConnection> bus, ListenerPool listeners) {
        super(channel);
        this.bus = bus;
        // we use a local listener pool unless a global one is provided.
        this.listeners = listeners != null ? listeners : new ListenerPool(2);
        this.id = UUID.randomUUID();
    }

    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 ListenerPool getListenerPool() {
        return listeners;
    }

    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 void disable() {
        active = false;
    }

    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;
        BitConnection other = (BitConnection) 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);
    }
}