| /* |
| * 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.ratis.util; |
| |
| import org.apache.ratis.BaseTest; |
| import org.apache.ratis.RaftTestUtil; |
| import org.junit.jupiter.api.Assertions; |
| import org.junit.jupiter.api.Test; |
| import org.junit.jupiter.api.Timeout; |
| |
| import java.util.concurrent.TimeoutException; |
| |
| import static org.apache.ratis.util.ResourceSemaphore.Group.SUCCESS; |
| |
| public class TestResourceSemaphore extends BaseTest { |
| @Test |
| @Timeout(value = 5) |
| public void testGroup() throws InterruptedException, TimeoutException { |
| final int FAILED_IN_ELEMENT_LIMIT = 0; |
| final int FAILED_IN_BYTE_SIZE_LIMIT = 1; |
| final ResourceSemaphore.Group g = new ResourceSemaphore.Group(3, 1); |
| |
| assertUsed(g, 0, 0); |
| assertAcquire(g, SUCCESS, 1, 1); |
| assertUsed(g, 1, 1); |
| assertAcquire(g, FAILED_IN_BYTE_SIZE_LIMIT, 1, 1); |
| assertUsed(g, 1, 1); |
| assertAcquire(g, FAILED_IN_BYTE_SIZE_LIMIT, 0, 1); |
| assertUsed(g, 1, 1); |
| assertAcquire(g, SUCCESS, 1, 0); |
| assertUsed(g, 2, 1); |
| assertAcquire(g, SUCCESS, 1, 0); |
| assertUsed(g, 3, 1); |
| assertAcquire(g, FAILED_IN_ELEMENT_LIMIT, 1, 0); |
| assertUsed(g, 3, 1); |
| |
| g.release(1, 1); |
| assertUsed(g, 2, 0); |
| g.release(2, 0); |
| assertUsed(g, 0, 0); |
| g.release(0, 0); |
| assertUsed(g, 0, 0); |
| |
| g.acquire(1, 1); |
| assertUsed(g, 1, 1); |
| final Thread t = new Thread(acquire(g, 1, 1)); |
| t.start(); |
| RaftTestUtil.waitFor(() -> Thread.State.WAITING == t.getState(), 100, 1000); |
| assertUsed(g, 2, 1); |
| |
| g.release(0, 1); |
| RaftTestUtil.waitFor(() -> Thread.State.TERMINATED == t.getState(), 100, 1000); |
| assertUsed(g, 2, 1); |
| |
| final Thread t1 = new Thread(acquire(g, 1, 1)); |
| t1.start(); |
| RaftTestUtil.waitFor(() -> Thread.State.WAITING == t1.getState(), 100, 1000); |
| assertUsed(g, 3, 1); |
| |
| t1.interrupt(); |
| RaftTestUtil.waitFor(() -> Thread.State.TERMINATED == t1.getState(), 100, 1000); |
| assertUsed(g, 2, 1); |
| g.release(2, 1); |
| |
| testFailureCase("release over limit-0", () -> g.release(1, 0), IllegalStateException.class); |
| testFailureCase("release over limit-1", () -> g.release(0, 1), IllegalStateException.class); |
| } |
| |
| static void assertUsed(ResourceSemaphore.Group g, int... expected) { |
| Assertions.assertEquals(expected.length, g.resourceSize()); |
| for(int i = 0; i < expected.length; i++) { |
| Assertions.assertEquals(expected[i], g.get(i).used()); |
| } |
| } |
| |
| static void assertAcquire(ResourceSemaphore.Group g, int expected, int... permits) { |
| final int computed = g.tryAcquire(permits); |
| Assertions.assertEquals(expected, computed); |
| } |
| |
| static Runnable acquire(ResourceSemaphore.Group g, int... permits) { |
| return () -> { |
| try { |
| g.acquire(permits); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| e.printStackTrace(); |
| } |
| }; |
| } |
| } |