com.cloudera.flume.collector.SequenceFileMerger.java Source code

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Here is the source code for com.cloudera.flume.collector.SequenceFileMerger.java

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/**
 * Licensed to Cloudera, Inc. under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Cloudera, Inc. 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 com.cloudera.flume.collector;

import java.io.File;
import java.io.IOException;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.SequenceFile;

import com.cloudera.flume.conf.FlumeConfiguration;
import com.cloudera.flume.handlers.hdfs.WriteableEvent;
import com.cloudera.flume.handlers.hdfs.WriteableEventKey;

public class SequenceFileMerger {

    public static void main(String[] argv) throws IOException {
        if (argv.length < 2) {
            System.out.println("need to specify target output file, and source dir");
            System.exit(-1);
        }

        FlumeConfiguration conf = FlumeConfiguration.get();
        Path dst = new Path(argv[0]);
        String src = argv[1];
        FileSystem fs = FileSystem.getLocal(conf);

        SequenceFile.Writer writer = SequenceFile.createWriter(fs, conf, dst, WriteableEventKey.class,
                WriteableEvent.class);

        long count = 0;
        long fcount = 0;
        File[] files = new File(src).listFiles();
        for (File f : files) {
            SequenceFile.Reader reader = new SequenceFile.Reader(fs, new Path(f.getAbsolutePath()), conf);
            System.out.println(f.getName());
            fcount++;
            boolean hasNext = true;
            while (hasNext) {
                WriteableEventKey k = new WriteableEventKey();
                WriteableEvent e = new WriteableEvent();
                hasNext = reader.next(k, e);
                if (hasNext) {
                    writer.append(k, e);
                    count++;
                }
            }
            reader.close();
        }

        writer.close();
        System.out.println("Wrote " + count + " entries from " + fcount + " files.");
    }
}