| /* |
| * 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.lucene.util; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| public class TestByteBlockPool extends LuceneTestCase { |
| |
| public void testReadAndWrite() throws IOException { |
| Counter bytesUsed = Counter.newCounter(); |
| ByteBlockPool pool = new ByteBlockPool(new ByteBlockPool.DirectTrackingAllocator(bytesUsed)); |
| pool.nextBuffer(); |
| boolean reuseFirst = random().nextBoolean(); |
| for (int j = 0; j < 2; j++) { |
| |
| List<BytesRef> list = new ArrayList<>(); |
| int maxLength = atLeast(500); |
| final int numValues = atLeast(100); |
| BytesRefBuilder ref = new BytesRefBuilder(); |
| for (int i = 0; i < numValues; i++) { |
| final String value = TestUtil.randomRealisticUnicodeString(random(), maxLength); |
| list.add(new BytesRef(value)); |
| ref.copyChars(value); |
| pool.append(ref.get()); |
| } |
| // verify |
| long position = 0; |
| for (BytesRef expected : list) { |
| ref.grow(expected.length); |
| ref.setLength(expected.length); |
| switch (random().nextInt(2)) { |
| case 0: |
| // copy bytes |
| pool.readBytes(position, ref.bytes(), 0, ref.length()); |
| break; |
| case 1: |
| BytesRef scratch = new BytesRef(); |
| scratch.length = ref.length(); |
| pool.setRawBytesRef(scratch, position); |
| System.arraycopy(scratch.bytes, scratch.offset, ref.bytes(), 0, ref.length()); |
| break; |
| default: |
| fail(); |
| } |
| assertEquals(expected, ref.get()); |
| position += ref.length(); |
| } |
| pool.reset(random().nextBoolean(), reuseFirst); |
| if (reuseFirst) { |
| assertEquals(ByteBlockPool.BYTE_BLOCK_SIZE, bytesUsed.get()); |
| } else { |
| assertEquals(0, bytesUsed.get()); |
| pool.nextBuffer(); // prepare for next iter |
| } |
| } |
| } |
| |
| public void testLargeRandomBlocks() throws IOException { |
| Counter bytesUsed = Counter.newCounter(); |
| ByteBlockPool pool = new ByteBlockPool(new ByteBlockPool.DirectTrackingAllocator(bytesUsed)); |
| pool.nextBuffer(); |
| |
| List<byte[]> items = new ArrayList<>(); |
| for (int i=0;i<100;i++) { |
| int size; |
| if (random().nextBoolean()) { |
| size = TestUtil.nextInt(random(), 100, 1000); |
| } else { |
| size = TestUtil.nextInt(random(), 50000, 100000); |
| } |
| byte[] bytes = new byte[size]; |
| random().nextBytes(bytes); |
| items.add(bytes); |
| pool.append(new BytesRef(bytes)); |
| } |
| |
| long position = 0; |
| for (byte[] expected : items) { |
| byte[] actual = new byte[expected.length]; |
| pool.readBytes(position, actual, 0, actual.length); |
| assertTrue(Arrays.equals(expected, actual)); |
| position += expected.length; |
| } |
| } |
| } |