72 lines
2.3 KiB
Java
72 lines
2.3 KiB
Java
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.github.sakserv.sequencefile;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.io.IntWritable;
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import org.apache.hadoop.io.SequenceFile;
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import org.apache.hadoop.io.Text;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.IOException;
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public class Main {
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// Logger
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private static final Logger LOG = LoggerFactory.getLogger(Main.class);
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public static void main(String[] args) {
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Configuration conf = new Configuration();
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try {
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FileSystem fs = FileSystem.get(conf);
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Path seqFileDir = new Path("/tmp/seq_file_test");
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fs.mkdirs(seqFileDir);
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Path seqFilePath = new Path(seqFileDir + "/file.seq");
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SequenceFile.Writer writer = SequenceFile.createWriter(conf,
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SequenceFile.Writer.file(seqFilePath), SequenceFile.Writer.keyClass(Text.class),
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SequenceFile.Writer.valueClass(IntWritable.class));
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writer.append(new Text("key1"), new IntWritable(1));
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writer.append(new Text("key2"), new IntWritable(2));
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writer.close();
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SequenceFile.Reader reader = new SequenceFile.Reader(conf,
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SequenceFile.Reader.file(seqFilePath));
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Text key = new Text();
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IntWritable val = new IntWritable();
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while (reader.next(key, val)) {
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System.out.println("SEQFILE KEY: " + key + "\t" + val);
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}
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fs.mkdirs(new Path("/tmp/seq_file_test"));
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reader.close();
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} catch(IOException e) {
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LOG.error("ERROR: Could not load hadoop configuration");
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e.printStackTrace();
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}
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}
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}
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