| // Copyright 2019 The Bazel Authors. All rights reserved. |
| // |
| // Licensed 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 com.google.devtools.build.lib.worker; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static com.google.devtools.build.lib.testutil.MoreAsserts.assertThrows; |
| |
| import com.google.devtools.build.lib.actions.UserExecException; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for {@link WorkerMultiplexerManager}. */ |
| @RunWith(JUnit4.class) |
| public class WorkerMultiplexerManagerTest { |
| |
| @Test |
| public void instanceCreationRemovalTest() throws Exception { |
| // Create a WorkerProxy hash and request for a WorkerMultiplexer. |
| Integer worker1Hash = "worker1".hashCode(); |
| WorkerMultiplexer wm1 = WorkerMultiplexerManager.getInstance(worker1Hash); |
| |
| assertThat(WorkerMultiplexerManager.getMultiplexer(worker1Hash)).isEqualTo(wm1); |
| assertThat(WorkerMultiplexerManager.getRefCount(worker1Hash)).isEqualTo(1); |
| assertThat(WorkerMultiplexerManager.getInstanceCount()).isEqualTo(1); |
| |
| // Create another WorkerProxy hash and request for a WorkerMultiplexer. |
| Integer worker2Hash = "worker2".hashCode(); |
| WorkerMultiplexer wm2 = WorkerMultiplexerManager.getInstance(worker2Hash); |
| |
| assertThat(WorkerMultiplexerManager.getMultiplexer(worker2Hash)).isEqualTo(wm2); |
| assertThat(WorkerMultiplexerManager.getRefCount(worker2Hash)).isEqualTo(1); |
| assertThat(WorkerMultiplexerManager.getInstanceCount()).isEqualTo(2); |
| |
| // Use the same WorkerProxy hash, it shouldn't instantiate a new WorkerMultiplexer. |
| WorkerMultiplexer wm2Annex = WorkerMultiplexerManager.getInstance(worker2Hash); |
| |
| assertThat(wm2).isEqualTo(wm2Annex); |
| assertThat(WorkerMultiplexerManager.getRefCount(worker2Hash)).isEqualTo(2); |
| assertThat(WorkerMultiplexerManager.getInstanceCount()).isEqualTo(2); |
| |
| // Remove an instance. If reference count is larger than 0, instance shouldn't be destroyed. |
| WorkerMultiplexerManager.removeInstance(worker2Hash); |
| |
| assertThat(WorkerMultiplexerManager.getRefCount(worker2Hash)).isEqualTo(1); |
| assertThat(WorkerMultiplexerManager.getInstanceCount()).isEqualTo(2); |
| |
| // Remove an instance. Reference count is down to 0, instance should be destroyed. |
| WorkerMultiplexerManager.removeInstance(worker2Hash); |
| |
| assertThrows( |
| UserExecException.class, () -> WorkerMultiplexerManager.getMultiplexer(worker2Hash)); |
| assertThat(WorkerMultiplexerManager.getInstanceCount()).isEqualTo(1); |
| |
| // WorkerProxy hash not found. |
| assertThrows( |
| UserExecException.class, () -> WorkerMultiplexerManager.removeInstance(worker2Hash)); |
| |
| // Remove all the instances. |
| WorkerMultiplexerManager.removeInstance(worker1Hash); |
| |
| assertThat(WorkerMultiplexerManager.getInstanceCount()).isEqualTo(0); |
| } |
| } |