| /** |
| * 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.apex.malhar.lib.utils.serde; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Random; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import com.google.common.collect.Lists; |
| |
| import com.datatorrent.netlet.util.Slice; |
| |
| public class BlockStreamTest |
| { |
| protected Random random = new Random(); |
| |
| @Test |
| public void testWindowedBlockStream() |
| { |
| WindowedBlockStream bs = new WindowedBlockStream(); |
| List<byte[]> totalList = Lists.newArrayList(); |
| List<Slice> slices = Lists.newArrayList(); |
| |
| for (int windowId = 0; windowId < 10; ++windowId) { |
| List<byte[]> list = generateList(); |
| totalList.addAll(list); |
| |
| bs.beginWindow(windowId); |
| writeToBlockStream(bs, list, slices); |
| bs.endWindow(); |
| |
| if (windowId % 2 != 0) { |
| verify(totalList, slices); |
| |
| bs.completeWindow(windowId); |
| totalList.clear(); |
| slices.clear(); |
| } |
| } |
| } |
| |
| @Test |
| public void testBlockStream() |
| { |
| BlockStream bs = new BlockStream(); |
| List<byte[]> totalList = Lists.newArrayList(); |
| List<Slice> slices = Lists.newArrayList(); |
| |
| for (int tryTime = 0; tryTime < 10; ++tryTime) { |
| List<byte[]> list = generateList(); |
| totalList.addAll(list); |
| |
| writeToBlockStream(bs, list, slices); |
| |
| if (tryTime % 2 != 0) { |
| verify(totalList, slices); |
| |
| bs.reset(); |
| totalList.clear(); |
| slices.clear(); |
| } |
| |
| } |
| } |
| |
| private void writeToBlockStream(BlockStream bs, List<byte[]> list, List<Slice> slices) |
| { |
| for (byte[] bytes : list) { |
| int times = random.nextInt(100) + 1; |
| int remainLen = bytes.length; |
| int offset = 0; |
| while (times > 0 && remainLen > 0) { |
| int avgSubLen = remainLen / times; |
| times--; |
| if (avgSubLen == 0) { |
| bs.write(bytes, offset, remainLen); |
| break; |
| } |
| |
| int writeLen = remainLen; |
| if (times != 0) { |
| int subLen = random.nextInt(avgSubLen * 2); |
| writeLen = Math.min(subLen, remainLen); |
| } |
| bs.write(bytes, offset, writeLen); |
| |
| offset += writeLen; |
| remainLen -= writeLen; |
| } |
| slices.add(bs.toSlice()); |
| } |
| } |
| |
| private void verify(List<byte[]> list, List<Slice> slices) |
| { |
| //verify |
| Assert.assertTrue("size not equal.", list.size() == slices.size()); |
| |
| for (int i = 0; i < list.size(); ++i) { |
| byte[] bytes = list.get(i); |
| byte[] newBytes = slices.get(i).toByteArray(); |
| if (!Arrays.equals(bytes, newBytes)) { |
| Assert.assertArrayEquals(bytes, newBytes); |
| } |
| } |
| } |
| |
| private List<byte[]> generateList() |
| { |
| List<byte[]> list = Lists.newArrayList(); |
| int size = random.nextInt(10000) + 1; |
| for (int i = 0; i < size; i++) { |
| list.add(generateByteArray()); |
| } |
| return list; |
| } |
| |
| protected byte[] generateByteArray() |
| { |
| int len = random.nextInt(10000) + 1; |
| byte[] bytes = new byte[len]; |
| random.nextBytes(bytes); |
| return bytes; |
| } |
| |
| |
| @Test |
| public void testReleaseMemory() |
| { |
| WindowedBlockStream stream = new WindowedBlockStream(); |
| |
| byte[] data = new byte[2048]; |
| final int loopPerWindow = 100; |
| long windowId = 0; |
| |
| //fill data; |
| for (; windowId < 100; ++windowId) { |
| stream.beginWindow(windowId); |
| for (int i = 0; i < loopPerWindow; ++i) { |
| stream.write(data); |
| stream.toSlice(); |
| } |
| stream.endWindow(); |
| } |
| |
| long capacity = stream.capacity(); |
| stream.completeWindow(windowId); |
| Assert.assertTrue(capacity == stream.capacity()); |
| Assert.assertTrue(0 == stream.size()); |
| |
| //release memory; |
| for (; windowId < 200; ++windowId) { |
| stream.beginWindow(windowId); |
| stream.endWindow(); |
| } |
| |
| //at least keep one block as current block |
| Assert.assertTrue(stream.capacity() == Block.DEFAULT_BLOCK_SIZE); |
| } |
| } |