| /* |
| * |
| * 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.cassandra.stress.generate.values; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| |
| import org.apache.cassandra.db.marshal.BytesType; |
| import org.apache.cassandra.stress.generate.FasterRandom; |
| |
| public class Bytes extends Generator<ByteBuffer> |
| { |
| private final byte[] bytes; |
| private final FasterRandom rand = new FasterRandom(); |
| |
| public Bytes(String name, GeneratorConfig config) |
| { |
| super(BytesType.instance, config, name, ByteBuffer.class); |
| bytes = new byte[(int) sizeDistribution.maxValue()]; |
| } |
| |
| @Override |
| public ByteBuffer generate() |
| { |
| long seed = identityDistribution.next(); |
| sizeDistribution.setSeed(seed); |
| rand.setSeed(~seed); |
| int size = (int) sizeDistribution.next(); |
| for (int i = 0; i < size; ) |
| for (long v = rand.nextLong(), |
| n = Math.min(size - i, Long.SIZE/Byte.SIZE); |
| n-- > 0; v >>= Byte.SIZE) |
| bytes[i++] = (byte)v; |
| return ByteBuffer.wrap(Arrays.copyOf(bytes, size)); |
| } |
| } |