| /* |
| * 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.catalina.session; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| |
| import static org.junit.Assert.fail; |
| |
| import org.junit.Test; |
| |
| /** |
| * The design of the session manager depends on the thread-safety - or not - of |
| * a number of classes. In some cases the Javadoc is unclear on the |
| * thread-safety of a class. These tests were written to test the thread-safety |
| * of key classes. |
| * |
| * Named Threading so it is not automatically executed as part of the unit |
| * tests. |
| */ |
| public class Threading { |
| |
| /* |
| * {@link FileInputStream#read(byte[])} and related methods are all native |
| * methods so it isn't immediately obvious if they are thread-safe or not. |
| * |
| * <pre> |
| * Windows JDK 1.6.0_22_x64 - Thread safe |
| * OSX JDK 1.6.0_22_x64 - Not thread safe |
| * OSX JDK 1.7.0_51_x64 - Not thread safe |
| * </pre> |
| * |
| * Therefore, have to assume that {@link FileInputStream#read(byte[])} is |
| * not thread safe. |
| */ |
| @Test |
| public void testFileInputStream() throws Exception { |
| doTestFileInputStream(1); |
| doTestFileInputStream(2); |
| doTestFileInputStream(4); |
| doTestFileInputStream(16); |
| } |
| |
| public void doTestFileInputStream(int threadCount) throws Exception { |
| |
| // Assumes "ant release" has been run |
| // Will need to be updated as new releases are made |
| File file = new File( |
| "./output/release/v8.0.15-dev/bin/apache-tomcat-8.0.15-dev.zip"); |
| |
| FileInputStream fis = new FileInputStream(file); |
| |
| Thread[] threads = new Thread[threadCount]; |
| FisReaderThread[] runnables = new FisReaderThread[threadCount]; |
| |
| for (int i = 0; i < threadCount; i++) { |
| runnables[i] = new FisReaderThread(fis); |
| threads[i] = new Thread(runnables[i]); |
| } |
| |
| long start = System.currentTimeMillis(); |
| |
| for (int i = 0; i < threadCount; i++) { |
| threads[i].start(); |
| } |
| for (int i = 0; i < threadCount; i++) { |
| try { |
| threads[i].join(); |
| if (runnables[i].isfailed()) { |
| fail(); |
| } |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| fail(e.getMessage()); |
| } |
| } |
| long end = System.currentTimeMillis(); |
| |
| long byteCount = 0; |
| for (int i = 0; i < threadCount; i++) { |
| byteCount += runnables[i].getByteCount(); |
| } |
| |
| StringBuilder result = new StringBuilder(); |
| result.append("Threads: "); |
| result.append(threadCount); |
| result.append(", Time(ms): "); |
| result.append(end-start); |
| result.append(", Bytes: "); |
| result.append(byteCount); |
| System.out.println(result.toString()); |
| } |
| |
| private static final class FisReaderThread implements Runnable { |
| |
| private FileInputStream fis; |
| // Small buffer to make the process slow |
| private byte[] buffer = new byte[4]; |
| private long byteCount = 0; |
| private boolean fail = false; |
| |
| public FisReaderThread(FileInputStream fis) { |
| this.fis = fis; |
| } |
| |
| @Override |
| public void run() { |
| int read = 0; |
| while (read > -1) { |
| byteCount += read; |
| try { |
| // Uncomment the sync block to test adding the sync fixes |
| // issues on platforms where fis is not thread-safe |
| // synchronized (fis) { |
| read = fis.read(buffer); |
| //} |
| } catch (IOException e) { |
| e.printStackTrace(); |
| fail = true; |
| read = -1; |
| } |
| } |
| } |
| |
| public long getByteCount() { |
| return byteCount; |
| } |
| |
| public boolean isfailed() { |
| return fail; |
| } |
| } |
| } |