| /* |
| * 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.cassandra.net; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| import java.util.function.LongFunction; |
| |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.utils.JVMStabilityInspector; |
| import org.apache.cassandra.utils.KillerForTests; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.net.ResourceLimits.*; |
| |
| import static org.junit.Assert.*; |
| |
| public class ResourceLimitsTest |
| { |
| @Test |
| public void testAllocatesWithinLimits() |
| { |
| testAllocatesWithinLimits(Basic::new); |
| testAllocatesWithinLimits(Concurrent::new); |
| } |
| |
| private void testAllocatesWithinLimits(LongFunction<Limit> supplier) |
| { |
| Limit limit = supplier.apply(100); |
| |
| assertEquals(100, limit.limit()); |
| assertEquals(0, limit.using()); |
| assertEquals(100, limit.remaining()); |
| |
| assertTrue(limit.tryAllocate(10)); |
| assertEquals(10, limit.using()); |
| assertEquals(90, limit.remaining()); |
| |
| assertTrue(limit.tryAllocate(30)); |
| assertEquals(40, limit.using()); |
| assertEquals(60, limit.remaining()); |
| |
| assertTrue(limit.tryAllocate(60)); |
| assertEquals(100, limit.using()); |
| assertEquals(0, limit.remaining()); |
| } |
| |
| @Test |
| public void testFailsToAllocateOverCapacity() |
| { |
| testFailsToAllocateOverCapacity(Basic::new); |
| testFailsToAllocateOverCapacity(Concurrent::new); |
| } |
| |
| private void testFailsToAllocateOverCapacity(LongFunction<Limit> supplier) |
| { |
| Limit limit = supplier.apply(100); |
| |
| assertEquals(100, limit.limit()); |
| assertEquals(0, limit.using()); |
| assertEquals(100, limit.remaining()); |
| |
| assertTrue(limit.tryAllocate(10)); |
| assertEquals(10, limit.using()); |
| assertEquals(90, limit.remaining()); |
| |
| assertFalse(limit.tryAllocate(91)); |
| assertEquals(10, limit.using()); |
| assertEquals(90, limit.remaining()); |
| } |
| |
| @Test |
| public void testRelease() |
| { |
| testRelease(Basic::new); |
| testRelease(Concurrent::new); |
| } |
| |
| private void testRelease(LongFunction<Limit> supplier) |
| { |
| Limit limit = supplier.apply(100); |
| |
| assertEquals(100, limit.limit()); |
| assertEquals(0, limit.using()); |
| assertEquals(100, limit.remaining()); |
| |
| assertTrue(limit.tryAllocate(10)); |
| assertTrue(limit.tryAllocate(30)); |
| assertTrue(limit.tryAllocate(60)); |
| assertEquals(100, limit.using()); |
| assertEquals(0, limit.remaining()); |
| |
| limit.release(10); |
| assertEquals(90, limit.using()); |
| assertEquals(10, limit.remaining()); |
| |
| limit.release(30); |
| assertEquals(60, limit.using()); |
| assertEquals(40, limit.remaining()); |
| |
| limit.release(60); |
| assertEquals(0, limit.using()); |
| assertEquals(100, limit.remaining()); |
| } |
| |
| @Test |
| public void testConcurrentLimit() throws Exception |
| { |
| int numThreads = 4; |
| int numPermitsPerThread = 1_000_000; |
| int numPermits = numThreads * numPermitsPerThread; |
| |
| CountDownLatch latch = new CountDownLatch(numThreads); |
| Limit limit = new Concurrent(numPermits); |
| |
| class Worker implements Runnable |
| { |
| public void run() |
| { |
| for (int i = 0; i < numPermitsPerThread; i += 10) |
| assertTrue(limit.tryAllocate(10)); |
| |
| for (int i = 0; i < numPermitsPerThread; i += 10) |
| limit.release(10); |
| |
| latch.countDown(); |
| } |
| } |
| |
| Executor executor = Executors.newFixedThreadPool(numThreads); |
| for (int i = 0; i < numThreads; i++) |
| executor.execute(new Worker()); |
| latch.await(10, TimeUnit.SECONDS); |
| |
| assertEquals(0, limit.using()); |
| assertEquals(numPermits, limit.remaining()); |
| } |
| |
| @Test |
| public void negativeConcurrentUsingValueKillsJVMTest() |
| { |
| DatabaseDescriptor.daemonInitialization(); // Prevent NPE for DatabaseDescriptor.getDiskFailurePolicy |
| KillerForTests killerForTests = new KillerForTests(); |
| JVMStabilityInspector.Killer originalKiller = JVMStabilityInspector.replaceKiller(killerForTests); |
| try |
| { |
| Concurrent concurrent = new Concurrent(1); |
| try |
| { |
| concurrent.release(2); |
| } |
| catch (Throwable tr) |
| { |
| JVMStabilityInspector.inspectThrowable(tr); |
| } |
| Assert.assertTrue(killerForTests.wasKilled()); |
| Assert.assertFalse(killerForTests.wasKilledQuietly()); //only killed quietly on startup failure |
| } |
| finally |
| { |
| JVMStabilityInspector.replaceKiller(originalKiller); |
| } |
| } |
| } |