org.apache.pig.piggybank.storage.RMQStorage.java Source code

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Here is the source code for org.apache.pig.piggybank.storage.RMQStorage.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.pig.piggybank.storage;

import java.io.IOException;

import org.apache.pig.builtin.PigStorage;
import org.apache.pig.builtin.PigStreaming;
import org.apache.pig.data.Tuple;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;

public class RMQStorage extends PigStorage {

    private String rabbitURI;
    boolean connected = false;
    private ConnectionFactory factory;
    private Connection connection;
    private Channel channel;
    private String exchangeName;
    private PigStreaming ps = new PigStreaming();

    public RMQStorage(String rabbitURI, String exchangeName) {
        this.rabbitURI = rabbitURI;
        this.exchangeName = exchangeName;
    }

    public void connect() {
        try {
            factory = new ConnectionFactory();
            factory.setUri(rabbitURI);

            connection = factory.newConnection();
            channel = connection.createChannel();

            channel.exchangeDeclare(exchangeName, "fanout", true);
            connected = true;
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("Failed to setup reader", e);
        }
    }

    @Override
    public void putNext(Tuple t) throws IOException {
        if (connected == false) {
            connect();
        }

        byte[] buf = ps.serialize(t);
        channel.basicPublish(exchangeName, "", null, buf);
    }
}