com.liveramp.hank.hadoop.HadoopTestCase.java Source code

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Here is the source code for com.liveramp.hank.hadoop.HadoopTestCase.java

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/**
 *  Copyright 2011 LiveRamp
 *
 *  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 com.liveramp.hank.hadoop;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.junit.Before;

import com.liveramp.cascading_ext.fs.TrashHelper;
import com.liveramp.hank.test.BaseTestCase;

public abstract class HadoopTestCase extends BaseTestCase {

    protected final FileSystem fs;

    protected final String TEST_DIR;
    protected final String INPUT_DIR;
    protected final String OUTPUT_DIR;

    public HadoopTestCase(Class<?> cls) throws IOException {
        super();
        this.fs = FileSystem.get(new Configuration());
        TEST_DIR = "/tmp/test_" + cls.getName();
        INPUT_DIR = TEST_DIR + "/input";
        OUTPUT_DIR = TEST_DIR + "/output";
    }

    @Before
    public void setUpHadoopTest() throws Exception {
        TrashHelper.deleteUsingTrashIfEnabled(fs, new Path(TEST_DIR));
        fs.mkdirs(new Path(TEST_DIR));
    }

    protected void outputFile(FileSystem fs, String path, String output) throws IOException {
        FSDataOutputStream os = fs.create(new Path(path));
        os.write(output.getBytes());
        os.close();
    }

    protected String getContents(FileSystem fs, String path) throws IOException {
        FSDataInputStream in = fs.open(new Path(path));
        StringBuilder builder = new StringBuilder();
        byte[] buffer = new byte[1024];
        int bytesRead;
        while ((bytesRead = in.read(buffer)) > 0) {
            builder.append(new String(buffer, 0, bytesRead));
        }
        in.close();
        return builder.toString();
    }
}