| /** |
| * 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.distributedlog; |
| |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.fail; |
| import org.apache.bookkeeper.feature.Feature; |
| import org.apache.bookkeeper.feature.SettableFeature; |
| import org.apache.bookkeeper.stats.NullStatsLogger; |
| import org.apache.distributedlog.exceptions.OverCapacityException; |
| import org.apache.distributedlog.util.SimplePermitLimiter; |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Test Cases for {@link org.apache.distributedlog.util.SimplePermitLimiter}. |
| */ |
| public class TestWriteLimiter { |
| static final Logger LOG = LoggerFactory.getLogger(TestWriteLimiter.class); |
| |
| SimplePermitLimiter createPermitLimiter(boolean darkmode, int permits) { |
| return createPermitLimiter(darkmode, permits, new SettableFeature("", 0)); |
| } |
| |
| SimplePermitLimiter createPermitLimiter(boolean darkmode, int permits, Feature feature) { |
| return new SimplePermitLimiter(darkmode, permits, new NullStatsLogger(), false, feature); |
| } |
| |
| @Test(timeout = 60000) |
| public void testGlobalOnly() throws Exception { |
| SimplePermitLimiter streamLimiter = createPermitLimiter(false, Integer.MAX_VALUE); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(false, 1); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| try { |
| limiter.acquire(); |
| fail("should have thrown global limit exception"); |
| } catch (OverCapacityException ex) { |
| } |
| assertPermits(streamLimiter, 1, globalLimiter, 1); |
| limiter.release(); |
| assertPermits(streamLimiter, 0, globalLimiter, 0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testStreamOnly() throws Exception { |
| SimplePermitLimiter streamLimiter = createPermitLimiter(false, 1); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(false, Integer.MAX_VALUE); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| try { |
| limiter.acquire(); |
| fail("should have thrown stream limit exception"); |
| } catch (OverCapacityException ex) { |
| } |
| assertPermits(streamLimiter, 1, globalLimiter, 1); |
| } |
| |
| @Test(timeout = 60000) |
| public void testDarkmode() throws Exception { |
| SimplePermitLimiter streamLimiter = createPermitLimiter(true, Integer.MAX_VALUE); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(true, 1); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| limiter.acquire(); |
| assertPermits(streamLimiter, 2, globalLimiter, 2); |
| } |
| |
| @Test(timeout = 60000) |
| public void testDarkmodeWithDisabledFeature() throws Exception { |
| SettableFeature feature = new SettableFeature("test", 10000); |
| SimplePermitLimiter streamLimiter = createPermitLimiter(true, 1, feature); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(true, Integer.MAX_VALUE, feature); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| limiter.acquire(); |
| assertPermits(streamLimiter, 2, globalLimiter, 2); |
| limiter.release(); |
| limiter.release(); |
| assertPermits(streamLimiter, 0, globalLimiter, 0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testDisabledFeature() throws Exception { |
| // Disable darkmode, but should still ignore limits because of the feature. |
| SettableFeature feature = new SettableFeature("test", 10000); |
| SimplePermitLimiter streamLimiter = createPermitLimiter(false, 1, feature); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(false, Integer.MAX_VALUE, feature); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| limiter.acquire(); |
| assertPermits(streamLimiter, 2, globalLimiter, 2); |
| limiter.release(); |
| limiter.release(); |
| assertPermits(streamLimiter, 0, globalLimiter, 0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testSetDisableFeatureAfterAcquireAndBeforeRelease() throws Exception { |
| SettableFeature feature = new SettableFeature("test", 0); |
| SimplePermitLimiter streamLimiter = createPermitLimiter(false, 2, feature); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(false, Integer.MAX_VALUE, feature); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| limiter.acquire(); |
| assertPermits(streamLimiter, 2, globalLimiter, 2); |
| feature.set(10000); |
| limiter.release(); |
| limiter.release(); |
| assertPermits(streamLimiter, 0, globalLimiter, 0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testUnsetDisableFeatureAfterPermitsExceeded() throws Exception { |
| SettableFeature feature = new SettableFeature("test", 10000); |
| SimplePermitLimiter streamLimiter = createPermitLimiter(false, 1, feature); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(false, Integer.MAX_VALUE, feature); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| limiter.acquire(); |
| limiter.acquire(); |
| limiter.acquire(); |
| assertPermits(streamLimiter, 4, globalLimiter, 4); |
| feature.set(0); |
| limiter.release(); |
| assertPermits(streamLimiter, 3, globalLimiter, 3); |
| try { |
| limiter.acquire(); |
| fail("should have thrown stream limit exception"); |
| } catch (OverCapacityException ex) { |
| } |
| assertPermits(streamLimiter, 3, globalLimiter, 3); |
| limiter.release(); |
| limiter.release(); |
| limiter.release(); |
| assertPermits(streamLimiter, 0, globalLimiter, 0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testUnsetDisableFeatureBeforePermitsExceeded() throws Exception { |
| SettableFeature feature = new SettableFeature("test", 0); |
| SimplePermitLimiter streamLimiter = createPermitLimiter(false, 1, feature); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(false, Integer.MAX_VALUE, feature); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| try { |
| limiter.acquire(); |
| fail("should have thrown stream limit exception"); |
| } catch (OverCapacityException ex) { |
| } |
| assertPermits(streamLimiter, 1, globalLimiter, 1); |
| feature.set(10000); |
| limiter.acquire(); |
| assertPermits(streamLimiter, 2, globalLimiter, 2); |
| } |
| |
| @Test(timeout = 60000) |
| public void testDarkmodeGlobalUnderStreamOver() throws Exception { |
| SimplePermitLimiter streamLimiter = createPermitLimiter(true, 1); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(true, 2); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| limiter.acquire(); |
| assertPermits(streamLimiter, 2, globalLimiter, 2); |
| limiter.release(); |
| limiter.release(); |
| assertPermits(streamLimiter, 0, globalLimiter, 0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testDarkmodeGlobalOverStreamUnder() throws Exception { |
| SimplePermitLimiter streamLimiter = createPermitLimiter(true, 2); |
| SimplePermitLimiter globalLimiter = createPermitLimiter(true, 1); |
| WriteLimiter limiter = new WriteLimiter("test", streamLimiter, globalLimiter); |
| limiter.acquire(); |
| limiter.acquire(); |
| assertPermits(streamLimiter, 2, globalLimiter, 2); |
| limiter.release(); |
| assertPermits(streamLimiter, 1, globalLimiter, 1); |
| limiter.release(); |
| assertPermits(streamLimiter, 0, globalLimiter, 0); |
| } |
| |
| void assertPermits(SimplePermitLimiter streamLimiter, |
| int streamPermits, SimplePermitLimiter globalLimiter, int globalPermits) { |
| assertEquals(streamPermits, streamLimiter.getPermits()); |
| assertEquals(globalPermits, globalLimiter.getPermits()); |
| } |
| } |