org.apache.hadoop.hdfs.protocol.RandomObjectsGenerators.java Source code

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Here is the source code for org.apache.hadoop.hdfs.protocol.RandomObjectsGenerators.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.hadoop.hdfs.protocol;

import org.apache.commons.lang.builder.ReflectionToStringBuilder;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableUtils;

import java.util.Arrays;
import java.util.Random;

import static org.junit.Assert.assertArrayEquals;

/**
 * Random generators of common objects, used in {@link TestClientProxyRequests} and {@link
 * TestClientProxyResponses}
 */
public class RandomObjectsGenerators {
    private RandomObjectsGenerators() {
    }

    static int rndPInt(Random rnd) {
        return rnd.nextInt(100) + 1;
    }

    static Block rndBlock(Random rnd) {
        return new Block(rnd.nextInt(1000000), rnd.nextInt(1000000), rnd.nextInt(100000));
    }

    static byte[] rndByteArr(Random rnd, int count) {
        byte[] bytes = new byte[count];
        rnd.nextBytes(bytes);
        return bytes;
    }

    static HdfsFileStatus[] rndHdfsFileStatusArr(Random rnd, int count) {
        HdfsFileStatus[] files = new HdfsFileStatus[count];
        for (int i = 0; i < files.length; i++) {
            files[i] = new HdfsFileStatus(rnd.nextLong(), rnd.nextBoolean(), rnd.nextInt(5), rnd.nextLong(),
                    rnd.nextLong(), rnd.nextLong(), new FsPermission((short) rnd.nextInt()),
                    "owner" + rnd.nextInt(), "group" + rnd.nextInt(), rndByteArr(rnd, rnd.nextInt(37)));
        }
        return files;
    }

    static LocatedBlocks[] rndLocatedBlocksArr(Random rnd, int count) {
        LocatedBlocks[] blockLocations = new LocatedBlocks[count];
        for (int i = 0; i < blockLocations.length; i++) {
            blockLocations[i] = new LocatedBlocks(rnd.nextInt(10000), Arrays.asList(rndLocatedBlockArr(rnd, 10)),
                    rnd.nextBoolean());
        }
        return blockLocations;
    }

    static LocatedBlocksWithMetaInfo rndLocatedBlocksWithMetaInfo(Random rnd) {
        return new LocatedBlocksWithMetaInfo(rnd.nextInt(), Arrays.asList(rndLocatedBlockArr(rnd, 13)),
                rnd.nextBoolean(), rnd.nextInt(), rnd.nextInt(), rnd.nextInt());
    }

    static LocatedBlockWithMetaInfo rndLocatedBlockWithMetaInfo(Random rnd) {
        return new LocatedBlockWithMetaInfo(rndBlock(rnd), rndDatanodeInfoArr(rnd, 13), rnd.nextInt(),
                rnd.nextInt(), rnd.nextInt(), rnd.nextInt());
    }

    static LocatedBlock[] rndLocatedBlockArr(Random rnd, int count) {
        LocatedBlock[] blockLocations = new LocatedBlock[count];
        for (int i = 0; i < blockLocations.length; i++) {
            blockLocations[i] = new LocatedBlock(rndBlock(rnd), rndDatanodeInfoArr(rnd, 2), rnd.nextInt(),
                    rnd.nextBoolean());
        }
        return blockLocations;
    }

    static DatanodeInfo[] rndDatanodeInfoArr(Random rnd, int count) {
        DatanodeInfo[] datanodes = new DatanodeInfo[count];
        for (int i = 0; i < datanodes.length; i++) {
            datanodes[i] = new DatanodeInfo("name" + rnd.nextInt(), "storage" + rnd.nextInt(), rnd.nextInt(65000),
                    rnd.nextInt(65000), rnd.nextInt(10000), rnd.nextInt(10000), rnd.nextInt(10000),
                    rnd.nextInt(1000000), rnd.nextInt(100000), rnd.nextInt(1000000), "location" + rnd.nextInt(),
                    "host" + rnd.nextInt(), rnd.nextInt(AdminStates.values().length));
        }
        return datanodes;
    }

    static DatanodeID rndDatanodeID(Random rnd) {
        return new DatanodeID("name" + rnd.nextInt(), "storage" + rnd.nextInt(), rnd.nextInt(65000),
                rnd.nextInt(65000));
    }

    static FsPermission rndFsPermission(Random rnd) {
        return new FsPermission((short) rnd.nextInt());
    }

    static String rndString(Random rnd) {
        return "string" + rnd.nextInt();
    }

    /** Compares writable objects and outputs them verbosely in case of mismatch */
    static void assertEqualsVerbose(Writable object, Writable objectCopy) {
        assertArrayEquals(
                "\nwritten  : " + ReflectionToStringBuilder.toString(object) + "\nread      : "
                        + ReflectionToStringBuilder.toString(objectCopy),
                WritableUtils.toByteArray(object), WritableUtils.toByteArray(objectCopy));
    }
}