| /* |
| * 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.beam.sdk.fn.splittabledofn; |
| |
| import static org.hamcrest.Matchers.contains; |
| import static org.hamcrest.Matchers.instanceOf; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertThat; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.apache.beam.sdk.fn.splittabledofn.RestrictionTrackers.ClaimObserver; |
| import org.apache.beam.sdk.transforms.splittabledofn.RestrictionTracker; |
| import org.apache.beam.sdk.transforms.splittabledofn.Sizes; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for {@link RestrictionTrackers}. */ |
| @RunWith(JUnit4.class) |
| public class RestrictionTrackersTest { |
| @Test |
| public void testObservingClaims() { |
| RestrictionTracker<String, String> observedTracker = |
| new RestrictionTracker() { |
| |
| @Override |
| public boolean tryClaim(Object position) { |
| return "goodClaim".equals(position); |
| } |
| |
| @Override |
| public Object currentRestriction() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public Object checkpoint() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void checkDone() throws IllegalStateException { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| |
| List<String> positionsObserved = new ArrayList<>(); |
| ClaimObserver<String> observer = |
| new ClaimObserver<String>() { |
| |
| @Override |
| public void onClaimed(String position) { |
| positionsObserved.add(position); |
| assertEquals("goodClaim", position); |
| } |
| |
| @Override |
| public void onClaimFailed(String position) { |
| positionsObserved.add(position); |
| } |
| }; |
| |
| RestrictionTracker<String, String> observingTracker = |
| RestrictionTrackers.observe(observedTracker, observer); |
| observingTracker.tryClaim("goodClaim"); |
| observingTracker.tryClaim("badClaim"); |
| |
| assertThat(positionsObserved, contains("goodClaim", "badClaim")); |
| } |
| |
| private static class RestrictionTrackerWithSize extends RestrictionTracker<Object, Object> |
| implements Sizes.HasSize { |
| |
| @Override |
| public double getSize() { |
| return 1; |
| } |
| |
| @Override |
| public boolean tryClaim(Object position) { |
| return false; |
| } |
| |
| @Override |
| public Object currentRestriction() { |
| return null; |
| } |
| |
| @Override |
| public Object checkpoint() { |
| return null; |
| } |
| |
| @Override |
| public void checkDone() throws IllegalStateException {} |
| } |
| |
| @Test |
| public void testClaimObserversMaintainBacklogInterfaces() { |
| RestrictionTracker hasSize = |
| RestrictionTrackers.observe(new RestrictionTrackerWithSize(), null); |
| assertThat(hasSize, instanceOf(Sizes.HasSize.class)); |
| } |
| } |