| /* |
| * 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.tephra.hbase.txprune; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Random; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * Tests to verify the behavior of {@link PruneUpperBoundWriterSupplier}. |
| */ |
| public class PruneUpperBoundWriterSupplierTest { |
| private static final Logger LOG = LoggerFactory.getLogger(PruneUpperBoundWriterSupplierTest.class); |
| private static final int NUM_OPS = 10000; |
| private static final int NUM_THREADS = 50; |
| |
| @Test |
| public void testSupplier() throws Exception { |
| final PruneUpperBoundWriterSupplier supplier = new PruneUpperBoundWriterSupplier(null, null, 10L); |
| // Get one instance now, for later comparisons |
| final PruneUpperBoundWriter writer = supplier.get(); |
| final AtomicInteger numOps = new AtomicInteger(NUM_OPS); |
| final Random random = new Random(System.currentTimeMillis()); |
| |
| // Start threads that will 'get' PruneUpperBoundWriters |
| ExecutorService executor = Executors.newFixedThreadPool(NUM_THREADS); |
| List<Future> futureList = new ArrayList<>(); |
| for (int i = 0; i < NUM_THREADS; i++) { |
| futureList.add(executor.submit(new Runnable() { |
| |
| @Override |
| public void run() { |
| // Perform NUM_OPS 'gets' of PruneUpperBoundWriter |
| while (numOps.decrementAndGet() > 0) { |
| PruneUpperBoundWriter newWriter = supplier.get(); |
| Assert.assertTrue(newWriter == writer); |
| int waitTime = random.nextInt(10); |
| try { |
| TimeUnit.MICROSECONDS.sleep(waitTime); |
| } catch (InterruptedException e) { |
| LOG.warn("Received an exception.", e); |
| } |
| } |
| } |
| })); |
| } |
| |
| for (Future future : futureList) { |
| future.get(5, TimeUnit.SECONDS); |
| } |
| executor.shutdown(); |
| executor.awaitTermination(2, TimeUnit.SECONDS); |
| |
| futureList.clear(); |
| numOps.set(NUM_OPS); |
| // Start thread that release PruneUpperBoundWriters |
| executor = Executors.newFixedThreadPool(NUM_THREADS); |
| for (int i = 0; i < NUM_THREADS; i++) { |
| futureList.add(executor.submit(new Runnable() { |
| |
| @Override |
| public void run() { |
| // We need to release all NUM_OPS 'gets' that were executed to trigger shutdown of the single instance of |
| // PruneUpperBoundWriter |
| while (numOps.decrementAndGet() > 0) { |
| supplier.release(); |
| try { |
| TimeUnit.MICROSECONDS.sleep(random.nextInt(10)); |
| } catch (InterruptedException e) { |
| LOG.warn("Received an exception.", e); |
| } |
| } |
| } |
| })); |
| } |
| |
| for (Future future : futureList) { |
| future.get(1, TimeUnit.SECONDS); |
| } |
| |
| executor.shutdown(); |
| executor.awaitTermination(2, TimeUnit.SECONDS); |
| |
| // Verify that the PruneUpperBoundWriter is still running and the pruneThread is still alive. |
| Assert.assertTrue(writer.isRunning()); |
| Assert.assertTrue(writer.isAlive()); |
| |
| // Since we got one instance in the beginning, we need to release it |
| supplier.release(); |
| |
| // Verify that the PruneUpperBoundWriter is shutdown and the pruneThread is not alive anymore. |
| Assert.assertFalse(writer.isRunning()); |
| Assert.assertFalse(writer.isAlive()); |
| } |
| } |