/**
* 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.");
}
}