| package org.apache.commons.jcs.auxiliary.disk.indexed; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| import java.util.Random; |
| |
| import org.apache.commons.jcs.auxiliary.disk.DiskTestObject; |
| import org.apache.commons.jcs.engine.CacheElement; |
| import org.apache.commons.jcs.engine.behavior.ICacheElement; |
| import org.apache.commons.jcs.utils.serialization.StandardSerializer; |
| |
| /** |
| * Utility for dealing with test objects. |
| * <p> |
| * @author Aaron Smuts |
| */ |
| public class DiskTestObjectUtil |
| { |
| /** |
| * Total from the start to the endPostion. |
| * <p> |
| * @param testObjects |
| * @param endPosition |
| * @return size |
| * @throws IOException |
| */ |
| public static long totalSize( DiskTestObject[] testObjects, int endPosition ) |
| throws IOException |
| { |
| StandardSerializer serializer = new StandardSerializer(); |
| long total = 0; |
| for ( int i = 0; i < endPosition; i++ ) |
| { |
| int tileSize = serializer.serialize( testObjects[i] ).length + IndexedDisk.HEADER_SIZE_BYTES; |
| total += tileSize; |
| } |
| return total; |
| } |
| |
| /** |
| * Total from the start to the endPostion. |
| * <p> |
| * @param elements |
| * @param endPosition |
| * @return size |
| * @throws IOException |
| */ |
| public static <K, V> long totalSize( ICacheElement<K, V>[] elements, int endPosition ) |
| throws IOException |
| { |
| return totalSize( elements, 0, endPosition ); |
| } |
| |
| /** |
| * Total from the start to the endPostion. |
| * <p> |
| * @param elements |
| * @param startPosition |
| * @param endPosition |
| * @return size |
| * @throws IOException |
| */ |
| public static <K, V> long totalSize( ICacheElement<K, V>[] elements, int startPosition, int endPosition ) |
| throws IOException |
| { |
| StandardSerializer serializer = new StandardSerializer(); |
| long total = 0; |
| for ( int i = startPosition; i < endPosition; i++ ) |
| { |
| int tileSize = serializer.serialize( elements[i] ).length + IndexedDisk.HEADER_SIZE_BYTES; |
| total += tileSize; |
| } |
| return total; |
| } |
| |
| /** |
| * Creates an array of ICacheElements with DiskTestObjects with payloads the byte size. |
| * <p> |
| * @param numToCreate |
| * @param bytes |
| * @param cacheName |
| * @return ICacheElement[] |
| */ |
| public static ICacheElement<Integer, DiskTestObject>[] createCacheElementsWithTestObjects( int numToCreate, int bytes, String cacheName ) |
| { |
| @SuppressWarnings("unchecked") |
| ICacheElement<Integer, DiskTestObject>[] elements = new ICacheElement[numToCreate]; |
| for ( int i = 0; i < numToCreate; i++ ) |
| { |
| // 24 KB |
| int size = bytes * 1024; |
| DiskTestObject tile = new DiskTestObject( Integer.valueOf( i ), new byte[size] ); |
| |
| ICacheElement<Integer, DiskTestObject> element = new CacheElement<>( cacheName, tile.id, tile ); |
| elements[i] = element; |
| } |
| return elements; |
| } |
| |
| /** |
| * Creates an array of ICacheElements with DiskTestObjects with payloads the byte size. |
| * <p> |
| * @param numToCreate |
| * @param cacheName |
| * @return ICacheElement[] |
| */ |
| public static ICacheElement<Integer, DiskTestObject>[] createCacheElementsWithTestObjectsOfVariableSizes( int numToCreate, String cacheName ) |
| { |
| @SuppressWarnings("unchecked") |
| ICacheElement<Integer, DiskTestObject>[] elements = new ICacheElement[numToCreate]; |
| Random random = new Random( 89 ); |
| for ( int i = 0; i < numToCreate; i++ ) |
| { |
| int bytes = random.nextInt( 20 ); |
| // 4-24 KB |
| int size = ( bytes + 4 ) * 1024; |
| DiskTestObject tile = new DiskTestObject( Integer.valueOf( i ), new byte[size] ); |
| |
| ICacheElement<Integer, DiskTestObject> element = new CacheElement<>( cacheName, tile.id, tile ); |
| elements[i] = element; |
| } |
| return elements; |
| } |
| |
| } |