| /** |
| * 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.tools.util; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.io.IOUtils; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import java.io.*; |
| |
| public class TestThrottledInputStream { |
| private static final Log LOG = LogFactory.getLog(TestThrottledInputStream.class); |
| private static final int BUFF_SIZE = 1024; |
| |
| private enum CB {ONE_C, BUFFER, BUFF_OFFSET} |
| |
| @Test |
| public void testRead() { |
| File tmpFile; |
| File outFile; |
| try { |
| tmpFile = createFile(1024); |
| outFile = createFile(); |
| |
| tmpFile.deleteOnExit(); |
| outFile.deleteOnExit(); |
| |
| long maxBandwidth = copyAndAssert(tmpFile, outFile, 0, 1, -1, CB.BUFFER); |
| |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 20, 0, CB.BUFFER); |
| /* |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 10, 0, CB.BUFFER); |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 50, 0, CB.BUFFER); |
| */ |
| |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 20, 0, CB.BUFF_OFFSET); |
| /* |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 10, 0, CB.BUFF_OFFSET); |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 50, 0, CB.BUFF_OFFSET); |
| */ |
| |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 20, 0, CB.ONE_C); |
| /* |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 10, 0, CB.ONE_C); |
| copyAndAssert(tmpFile, outFile, maxBandwidth, 50, 0, CB.ONE_C); |
| */ |
| } catch (IOException e) { |
| LOG.error("Exception encountered ", e); |
| } |
| } |
| |
| private long copyAndAssert(File tmpFile, File outFile, |
| long maxBandwidth, float factor, |
| int sleepTime, CB flag) throws IOException { |
| long bandwidth; |
| ThrottledInputStream in; |
| long maxBPS = (long) (maxBandwidth / factor); |
| |
| if (maxBandwidth == 0) { |
| in = new ThrottledInputStream(new FileInputStream(tmpFile)); |
| } else { |
| in = new ThrottledInputStream(new FileInputStream(tmpFile), maxBPS); |
| } |
| OutputStream out = new FileOutputStream(outFile); |
| try { |
| if (flag == CB.BUFFER) { |
| copyBytes(in, out, BUFF_SIZE); |
| } else if (flag == CB.BUFF_OFFSET){ |
| copyBytesWithOffset(in, out, BUFF_SIZE); |
| } else { |
| copyByteByByte(in, out); |
| } |
| |
| LOG.info(in); |
| bandwidth = in.getBytesPerSec(); |
| Assert.assertEquals(in.getTotalBytesRead(), tmpFile.length()); |
| Assert.assertTrue(in.getBytesPerSec() > maxBandwidth / (factor * 1.2)); |
| Assert.assertTrue(in.getTotalSleepTime() > sleepTime || in.getBytesPerSec() <= maxBPS); |
| } finally { |
| IOUtils.closeStream(in); |
| IOUtils.closeStream(out); |
| } |
| return bandwidth; |
| } |
| |
| private static void copyBytesWithOffset(InputStream in, OutputStream out, int buffSize) |
| throws IOException { |
| |
| byte buf[] = new byte[buffSize]; |
| int bytesRead = in.read(buf, 0, buffSize); |
| while (bytesRead >= 0) { |
| out.write(buf, 0, bytesRead); |
| bytesRead = in.read(buf); |
| } |
| } |
| |
| private static void copyByteByByte(InputStream in, OutputStream out) |
| throws IOException { |
| |
| int ch = in.read(); |
| while (ch >= 0) { |
| out.write(ch); |
| ch = in.read(); |
| } |
| } |
| |
| private static void copyBytes(InputStream in, OutputStream out, int buffSize) |
| throws IOException { |
| |
| byte buf[] = new byte[buffSize]; |
| int bytesRead = in.read(buf); |
| while (bytesRead >= 0) { |
| out.write(buf, 0, bytesRead); |
| bytesRead = in.read(buf); |
| } |
| } |
| |
| private File createFile(long sizeInKB) throws IOException { |
| File tmpFile = createFile(); |
| writeToFile(tmpFile, sizeInKB); |
| return tmpFile; |
| } |
| |
| private File createFile() throws IOException { |
| return File.createTempFile("tmp", "dat"); |
| } |
| |
| private void writeToFile(File tmpFile, long sizeInKB) throws IOException { |
| OutputStream out = new FileOutputStream(tmpFile); |
| try { |
| byte[] buffer = new byte [1024]; |
| for (long index = 0; index < sizeInKB; index++) { |
| out.write(buffer); |
| } |
| } finally { |
| IOUtils.closeStream(out); |
| } |
| } |
| } |