| /** |
| * 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.ozone.loadgenerators; |
| |
| import org.apache.commons.lang3.RandomUtils; |
| import org.apache.hadoop.ozone.utils.LoadBucket; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * This load generator writes some files and reads the same file multiple times. |
| */ |
| public class ReadOnlyLoadGenerator extends LoadGenerator { |
| private final LoadBucket replBucket; |
| private final DataBuffer dataBuffer; |
| private final static int NUM_KEYS = 10; |
| |
| public ReadOnlyLoadGenerator(DataBuffer dataBuffer, LoadBucket replBucket) { |
| this.dataBuffer = dataBuffer; |
| this.replBucket = replBucket; |
| } |
| |
| @Override |
| public void generateLoad() throws Exception { |
| int index = RandomUtils.nextInt(0, NUM_KEYS); |
| ByteBuffer buffer = dataBuffer.getBuffer(index); |
| String keyName = getKeyName(index); |
| replBucket.readKey(buffer, keyName); |
| } |
| |
| |
| public void initialize() throws Exception { |
| for (int index = 0; index < NUM_KEYS; index++) { |
| ByteBuffer buffer = dataBuffer.getBuffer(index); |
| String keyName = getKeyName(index); |
| replBucket.writeKey(buffer, keyName); |
| } |
| } |
| } |