| /* |
| * 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.store; |
| |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.InetSocketAddress; |
| import java.net.Socket; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.Random; |
| |
| import org.apache.lucene.util.SuppressForbidden; |
| |
| /** |
| * Simple standalone tool that forever acquires and releases a |
| * lock using a specific {@link LockFactory}. Run without any args |
| * to see usage. |
| * |
| * @see VerifyingLockFactory |
| * @see LockVerifyServer |
| */ |
| |
| public class LockStressTest { |
| static final String LOCK_FILE_NAME = "test.lock"; |
| |
| @SuppressForbidden(reason = "System.out required: command line tool") |
| public static void main(String[] args) throws Exception { |
| if (args.length != 7) { |
| System.out.println("Usage: java org.apache.lucene.store.LockStressTest myID verifierHost verifierPort lockFactoryClassName lockDirName sleepTimeMS count\n" + |
| "\n" + |
| " myID = int from 0 .. 255 (should be unique for test process)\n" + |
| " verifierHost = hostname that LockVerifyServer is listening on\n" + |
| " verifierPort = port that LockVerifyServer is listening on\n" + |
| " lockFactoryClassName = primary FSLockFactory class that we will use\n" + |
| " lockDirName = path to the lock directory\n" + |
| " sleepTimeMS = milliseconds to pause betweeen each lock obtain/release\n" + |
| " count = number of locking tries\n" + |
| "\n" + |
| "You should run multiple instances of this process, each with its own\n" + |
| "unique ID, and each pointing to the same lock directory, to verify\n" + |
| "that locking is working correctly.\n" + |
| "\n" + |
| "Make sure you are first running LockVerifyServer."); |
| System.exit(1); |
| } |
| |
| int arg = 0; |
| final int myID = Integer.parseInt(args[arg++]); |
| final String verifierHost = args[arg++]; |
| final int verifierPort = Integer.parseInt(args[arg++]); |
| final String lockFactoryClassName = args[arg++]; |
| final Path lockDirPath = Paths.get(args[arg++]); |
| final int sleepTimeMS = Integer.parseInt(args[arg++]); |
| final int count = Integer.parseInt(args[arg++]); |
| |
| int exitCode = run(myID, verifierHost, verifierPort, lockFactoryClassName, lockDirPath, sleepTimeMS, count); |
| System.exit(exitCode); |
| } |
| |
| @SuppressForbidden(reason = "System.out required: command line tool") |
| @SuppressWarnings("try") |
| private static int run(int myID, String verifierHost, int verifierPort, String lockFactoryClassName, |
| Path lockDirPath, int sleepTimeMS, int count) throws IOException, InterruptedException { |
| if (myID < 0 || myID > 255) { |
| System.out.println("myID must be a unique int 0..255"); |
| return 1; |
| } |
| |
| final LockFactory lockFactory = getNewLockFactory(lockFactoryClassName); |
| // we test the lock factory directly, so we don't need it on the directory itself (the directory is just for testing) |
| final FSDirectory lockDir = new SimpleFSDirectory(lockDirPath, NoLockFactory.INSTANCE); |
| final InetSocketAddress addr = new InetSocketAddress(verifierHost, verifierPort); |
| System.out.println("Connecting to server " + addr + |
| " and registering as client " + myID + "..."); |
| try (Socket socket = new Socket()) { |
| socket.setReuseAddress(true); |
| socket.connect(addr, 500); |
| final OutputStream out = socket.getOutputStream(); |
| final InputStream in = socket.getInputStream(); |
| |
| out.write(myID); |
| out.flush(); |
| LockFactory verifyLF = new VerifyingLockFactory(lockFactory, in, out); |
| final Random rnd = new Random(); |
| |
| // wait for starting gun |
| if (in.read() != LockVerifyServer.START_GUN_SIGNAL) { |
| throw new IOException("Protocol violation"); |
| } |
| |
| for (int i = 0; i < count; i++) { |
| try (final Lock l = verifyLF.obtainLock(lockDir, LOCK_FILE_NAME)) { |
| if (rnd.nextInt(10) == 0) { |
| if (rnd.nextBoolean()) { |
| verifyLF = new VerifyingLockFactory(getNewLockFactory(lockFactoryClassName), in, out); |
| } |
| try (final Lock secondLock = verifyLF.obtainLock(lockDir, LOCK_FILE_NAME)) { |
| throw new IOException("Double obtain"); |
| } catch (LockObtainFailedException loe) { |
| // pass |
| } |
| } |
| Thread.sleep(sleepTimeMS); |
| } catch (LockObtainFailedException loe) { |
| // obtain failed |
| } |
| |
| if (i % 500 == 0) { |
| System.out.println((i * 100. / count) + "% done."); |
| } |
| |
| Thread.sleep(sleepTimeMS); |
| } |
| } |
| |
| System.out.println("Finished " + count + " tries."); |
| return 0; |
| } |
| |
| private static FSLockFactory getNewLockFactory(String lockFactoryClassName) throws IOException { |
| // try to get static INSTANCE field of class |
| try { |
| return (FSLockFactory) Class.forName(lockFactoryClassName).getField("INSTANCE").get(null); |
| } catch (ReflectiveOperationException e) { |
| // fall-through |
| } |
| |
| // try to create a new instance |
| try { |
| return Class.forName(lockFactoryClassName).asSubclass(FSLockFactory.class).newInstance(); |
| } catch (ReflectiveOperationException | ClassCastException e) { |
| // fall-through |
| } |
| |
| throw new IOException("Cannot get lock factory singleton of " + lockFactoryClassName); |
| } |
| } |