co.cask.hydrator.plugin.batchSource.KafkaSplit.java Source code

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Here is the source code for co.cask.hydrator.plugin.batchSource.KafkaSplit.java

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/*
 * Copyright  2017 Cask Data, Inc.
 *
 * Licensed 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 co.cask.hydrator.plugin.batchSource;

import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapreduce.InputSplit;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Nullable;

/**
 * Kafka split
 */
public class KafkaSplit extends InputSplit implements Writable {
    private KafkaRequest request;
    private long length = 0;

    public KafkaSplit() {
    }

    public KafkaSplit(KafkaRequest request) {
        this.request = request;
        length = request.estimateDataSize();
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        String topic = in.readUTF();
        String leaderId = in.readUTF();
        String str = in.readUTF();
        URI uri = null;
        if (!str.isEmpty())
            try {
                uri = new URI(str);
            } catch (URISyntaxException e) {
                throw new RuntimeException(e);
            }
        int partition = in.readInt();
        long offset = in.readLong();
        long latestOffset = in.readLong();
        request = new KafkaRequest(topic, leaderId, partition, uri, offset, latestOffset);
        length = request.estimateDataSize();
    }

    @Override
    public void write(DataOutput out) throws IOException {
        out.writeUTF(request.getTopic());
        out.writeUTF(request.getLeaderId());
        if (request.getURI() != null)
            out.writeUTF(request.getURI().toString());
        else
            out.writeUTF("");
        out.writeInt(request.getPartition());
        out.writeLong(request.getOffset());
        out.writeLong(request.getLastOffset());
    }

    @Override
    public long getLength() throws IOException {
        return length;
    }

    @Override
    public String[] getLocations() throws IOException {
        return new String[] {};
    }

    @Nullable
    public KafkaRequest popRequest() {
        KafkaRequest result = request;
        request = null;
        return result;
    }
}