| /* |
| * 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.hadoop.hdds.utils; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertThrows; |
| |
| import org.apache.hadoop.io.retry.RetryPolicies; |
| import org.apache.hadoop.io.retry.RetryPolicy; |
| import org.junit.Test; |
| |
| import java.io.IOException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.zip.ZipException; |
| |
| /** |
| * Tests for {@link RetriableTask}. |
| */ |
| public class TestRetriableTask { |
| |
| @Test |
| public void returnsSuccessfulResult() throws Exception { |
| String result = "bilbo"; |
| RetriableTask<String> task = new RetriableTask<>( |
| RetryPolicies.RETRY_FOREVER, "test", () -> result); |
| assertEquals(result, task.call()); |
| } |
| |
| @Test |
| public void returnsSuccessfulResultAfterFailures() throws Exception { |
| String result = "gandalf"; |
| AtomicInteger attempts = new AtomicInteger(); |
| RetriableTask<String> task = new RetriableTask<>( |
| RetryPolicies.RETRY_FOREVER, "test", |
| () -> { |
| if (attempts.incrementAndGet() <= 2) { |
| throw new Exception("testing"); |
| } |
| return result; |
| }); |
| assertEquals(result, task.call()); |
| } |
| |
| @Test |
| public void respectsRetryPolicy() { |
| int expectedAttempts = 3; |
| AtomicInteger attempts = new AtomicInteger(); |
| RetryPolicy retryPolicy = RetryPolicies.retryUpToMaximumCountWithFixedSleep( |
| expectedAttempts, 1, TimeUnit.MILLISECONDS); |
| RetriableTask<String> task = new RetriableTask<>(retryPolicy, "thr", () -> { |
| attempts.incrementAndGet(); |
| throw new ZipException("testing"); |
| }); |
| |
| IOException e = assertThrows(IOException.class, task::call); |
| assertEquals(ZipException.class, e.getCause().getClass()); |
| assertEquals(expectedAttempts, attempts.get()); |
| } |
| |
| } |