co.cask.cdap.examples.fileset.FileSetExample.java Source code

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Here is the source code for co.cask.cdap.examples.fileset.FileSetExample.java

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/*
 * Copyright  2014 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.cdap.examples.fileset;

import co.cask.cdap.api.app.AbstractApplication;
import co.cask.cdap.api.dataset.lib.FileSet;
import co.cask.cdap.api.dataset.lib.FileSetProperties;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;

/**
 * An application that illustrates how to use the FileSet dataset.
 * <ul>
 * <li>Uses a Service that uploads files inor downloads files toa FileSet.</li>
 * <li>Includes a MapReduce that implements the classic word count example. The input and output paths
 *     of the MapReduce can be configured through runtime arguments.</li>
 * </ul>
 */
public class FileSetExample extends AbstractApplication {

    @Override
    public void configure() {
        setName("FileSetExample");
        setDescription("Application with a MapReduce that uses a FileSet dataset");
        createDataset("lines", FileSet.class,
                FileSetProperties.builder().setBasePath("example/data/lines").setInputFormat(TextInputFormat.class)
                        .setOutputFormat(TextOutputFormat.class).setDescription("Store input lines").build());
        createDataset("counts", FileSet.class,
                FileSetProperties.builder().setInputFormat(TextInputFormat.class)
                        .setOutputFormat(TextOutputFormat.class).setOutputProperty(TextOutputFormat.SEPERATOR, ":")
                        .setDescription("Store word counts").build());
        addService(new FileSetService());
        addMapReduce(new WordCount());
    }
}