| /* |
| * 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.io.common; |
| |
| import static org.apache.beam.sdk.io.common.IOITHelper.executeWithRetry; |
| import static org.junit.Assert.assertEquals; |
| |
| import java.sql.SQLException; |
| import java.util.ArrayList; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.ExpectedException; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for functions in {@link IOITHelper}. */ |
| @RunWith(JUnit4.class) |
| public class IOITHelperTest { |
| private static long startTimeMeasure; |
| private static String message = ""; |
| private static ArrayList<Exception> listOfExceptionsThrown; |
| |
| @Rule public ExpectedException exceptionRule = ExpectedException.none(); |
| |
| @Before |
| public void setup() { |
| listOfExceptionsThrown = new ArrayList<>(); |
| } |
| |
| @Test |
| public void retryHealthyFunction() throws Exception { |
| executeWithRetry(IOITHelperTest::validFunction); |
| assertEquals("The healthy function.", message); |
| } |
| |
| @Test |
| public void retryFunctionThatWillFail() throws Exception { |
| exceptionRule.expect(SQLException.class); |
| exceptionRule.expectMessage("Problem with connection"); |
| executeWithRetry(IOITHelperTest::failingFunction); |
| assertEquals(3, listOfExceptionsThrown.size()); |
| } |
| |
| @Test |
| public void retryFunctionThatFailsWithMoreAttempts() throws Exception { |
| exceptionRule.expect(SQLException.class); |
| exceptionRule.expectMessage("Problem with connection"); |
| executeWithRetry(4, 1_000, IOITHelperTest::failingFunction); |
| assertEquals(4, listOfExceptionsThrown.size()); |
| } |
| |
| @Test |
| public void retryFunctionThatRecovers() throws Exception { |
| startTimeMeasure = System.currentTimeMillis(); |
| executeWithRetry(IOITHelperTest::recoveringFunction); |
| assertEquals(1, listOfExceptionsThrown.size()); |
| } |
| |
| @Test |
| public void retryFunctionThatRecoversAfterBiggerDelay() throws Exception { |
| startTimeMeasure = System.currentTimeMillis(); |
| executeWithRetry(3, 2_000, IOITHelperTest::recoveringFunctionWithBiggerDelay); |
| assertEquals(1, listOfExceptionsThrown.size()); |
| } |
| |
| private static void failingFunction() throws SQLException { |
| SQLException e = new SQLException("Problem with connection"); |
| listOfExceptionsThrown.add(e); |
| throw e; |
| } |
| |
| private static void recoveringFunction() throws SQLException { |
| if (System.currentTimeMillis() - startTimeMeasure < 1_001) { |
| SQLException e = new SQLException("Problem with connection"); |
| listOfExceptionsThrown.add(e); |
| throw e; |
| } |
| } |
| |
| private static void recoveringFunctionWithBiggerDelay() throws SQLException { |
| if (System.currentTimeMillis() - startTimeMeasure < 2_001) { |
| SQLException e = new SQLException("Problem with connection"); |
| listOfExceptionsThrown.add(e); |
| throw e; |
| } |
| } |
| |
| private static void validFunction() throws SQLException { |
| message = "The healthy function."; |
| } |
| } |