--- /dev/null
+package org.apache.lucene.store;
+
+/**
+ * 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.
+ */
+
+import java.io.IOException;
+import java.io.File;
+
+/**
+ * Simple standalone tool that forever acquires & releases a
+ * lock using a specific LockFactory. Run without any args
+ * to see usage.
+ *
+ * @see VerifyingLockFactory
+ * @see LockVerifyServer
+ */
+
+public class LockStressTest {
+
+ public static void main(String[] args) throws Exception {
+
+ if (args.length != 6) {
+ System.out.println("\nUsage: java org.apache.lucene.store.LockStressTest myID verifierHostOrIP verifierPort lockFactoryClassName lockDirName sleepTime\n" +
+ "\n" +
+ " myID = int from 0 .. 255 (should be unique for test process)\n" +
+ " verifierHostOrIP = host name or IP address where LockVerifyServer is running\n" +
+ " verifierPort = port that LockVerifyServer is listening on\n" +
+ " lockFactoryClassName = primary LockFactory class that we will use\n" +
+ " lockDirName = path to the lock directory (only set for Simple/NativeFSLockFactory\n" +
+ " sleepTimeMS = milliseconds to pause betweeen each lock obtain/release\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.\n" +
+ "\n");
+ System.exit(1);
+ }
+
+ final int myID = Integer.parseInt(args[0]);
+
+ if (myID < 0 || myID > 255) {
+ System.out.println("myID must be a unique int 0..255");
+ System.exit(1);
+ }
+
+ final String verifierHost = args[1];
+ final int verifierPort = Integer.parseInt(args[2]);
+ final String lockFactoryClassName = args[3];
+ final String lockDirName = args[4];
+ final int sleepTimeMS = Integer.parseInt(args[5]);
+
+ LockFactory lockFactory;
+ try {
+ lockFactory = Class.forName(lockFactoryClassName).asSubclass(LockFactory.class).newInstance();
+ } catch (IllegalAccessException e) {
+ throw new IOException("IllegalAccessException when instantiating LockClass " + lockFactoryClassName);
+ } catch (InstantiationException e) {
+ throw new IOException("InstantiationException when instantiating LockClass " + lockFactoryClassName);
+ } catch (ClassCastException e) {
+ throw new IOException("unable to cast LockClass " + lockFactoryClassName + " instance to a LockFactory");
+ } catch (ClassNotFoundException e) {
+ throw new IOException("unable to find LockClass " + lockFactoryClassName);
+ }
+
+ File lockDir = new File(lockDirName);
+
+ if (lockFactory instanceof FSLockFactory) {
+ ((FSLockFactory) lockFactory).setLockDir(lockDir);
+ }
+
+ lockFactory.setLockPrefix("test");
+
+ LockFactory verifyLF = new VerifyingLockFactory((byte) myID, lockFactory, verifierHost, verifierPort);
+
+ Lock l = verifyLF.makeLock("test.lock");
+
+ while(true) {
+
+ boolean obtained = false;
+
+ try {
+ obtained = l.obtain(10);
+ } catch (LockObtainFailedException e) {
+ System.out.print("x");
+ }
+
+ if (obtained) {
+ System.out.print("l");
+ l.release();
+ }
+ Thread.sleep(sleepTimeMS);
+ }
+ }
+}