io.hops.erasure_coding.TestUtil.java Source code

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Here is the source code for io.hops.erasure_coding.TestUtil.java

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/*
 * Copyright (C) 2015 hops.io.
 *
 * 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 io.hops.erasure_coding;

import io.hops.metadata.hdfs.entity.EncodingPolicy;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DistributedFileSystem;

import java.io.IOException;
import java.util.Random;

public class TestUtil {

    public static void createRandomFile(DistributedFileSystem dfs, Path path, long seed, int blockCount,
            int blockSize) throws IOException {
        FSDataOutputStream out = dfs.create(path, new EncodingPolicy("src", (short) 1));
        byte[] buffer = randomBytes(seed, blockCount, blockSize);
        out.write(buffer, 0, buffer.length);
        out.close();
    }

    public static byte[] randomBytes(long seed, int blockCount, int blockSize) {
        return randomBytes(seed, blockCount * blockSize);
    }

    public static byte[] randomBytes(long seed, int size) {
        final byte[] b = new byte[size];
        final Random rand = new Random(seed);
        rand.nextBytes(b);
        return b;
    }
}