| /* |
| * 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.hbase.errorhandling; |
| |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.testclassification.MasterTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.mockito.Mockito; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Test that we propagate errors through an dispatcher exactly once via different failure injection |
| * mechanisms. |
| */ |
| @Category({ MasterTests.class, SmallTests.class }) |
| public class TestForeignExceptionDispatcher { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestForeignExceptionDispatcher.class); |
| |
| private static final Logger LOG = LoggerFactory.getLogger(TestForeignExceptionDispatcher.class); |
| |
| /** |
| * Exception thrown from the test |
| */ |
| final ForeignException EXTEXN = |
| new ForeignException("FORTEST", new IllegalArgumentException("FORTEST")); |
| final ForeignException EXTEXN2 = |
| new ForeignException("FORTEST2", new IllegalArgumentException("FORTEST2")); |
| |
| /** |
| * Tests that a dispatcher only dispatches only the first exception, and does not propagate |
| * subsequent exceptions. |
| */ |
| @Test |
| public void testErrorPropagation() { |
| ForeignExceptionListener listener1 = Mockito.mock(ForeignExceptionListener.class); |
| ForeignExceptionListener listener2 = Mockito.mock(ForeignExceptionListener.class); |
| ForeignExceptionDispatcher dispatcher = new ForeignExceptionDispatcher(); |
| |
| // add the listeners |
| dispatcher.addListener(listener1); |
| dispatcher.addListener(listener2); |
| |
| // create an artificial error |
| dispatcher.receive(EXTEXN); |
| |
| // make sure the listeners got the error |
| Mockito.verify(listener1, Mockito.times(1)).receive(EXTEXN); |
| Mockito.verify(listener2, Mockito.times(1)).receive(EXTEXN); |
| |
| // make sure that we get an exception |
| try { |
| dispatcher.rethrowException(); |
| fail("Monitor should have thrown an exception after getting error."); |
| } catch (ForeignException ex) { |
| assertTrue("Got an unexpected exception:" + ex, ex.getCause() == EXTEXN.getCause()); |
| LOG.debug("Got the testing exception!"); |
| } |
| |
| // push another error, which should be not be passed to listeners |
| dispatcher.receive(EXTEXN2); |
| Mockito.verify(listener1, Mockito.never()).receive(EXTEXN2); |
| Mockito.verify(listener2, Mockito.never()).receive(EXTEXN2); |
| } |
| |
| @Test |
| public void testSingleDispatcherWithTimer() { |
| ForeignExceptionListener listener1 = Mockito.mock(ForeignExceptionListener.class); |
| ForeignExceptionListener listener2 = Mockito.mock(ForeignExceptionListener.class); |
| |
| ForeignExceptionDispatcher monitor = new ForeignExceptionDispatcher(); |
| |
| // add the listeners |
| monitor.addListener(listener1); |
| monitor.addListener(listener2); |
| |
| TimeoutExceptionInjector timer = new TimeoutExceptionInjector(monitor, 1000); |
| timer.start(); |
| timer.trigger(); |
| |
| assertTrue("Monitor didn't get timeout", monitor.hasException()); |
| |
| // verify that that we propagated the error |
| Mockito.verify(listener1).receive(Mockito.any()); |
| Mockito.verify(listener2).receive(Mockito.any()); |
| } |
| |
| /** |
| * Test that the dispatcher can receive an error via the timer mechanism. |
| */ |
| @Test |
| public void testAttemptTimer() { |
| ForeignExceptionListener listener1 = Mockito.mock(ForeignExceptionListener.class); |
| ForeignExceptionListener listener2 = Mockito.mock(ForeignExceptionListener.class); |
| ForeignExceptionDispatcher orchestrator = new ForeignExceptionDispatcher(); |
| |
| // add the listeners |
| orchestrator.addListener(listener1); |
| orchestrator.addListener(listener2); |
| |
| // now create a timer and check for that error |
| TimeoutExceptionInjector timer = new TimeoutExceptionInjector(orchestrator, 1000); |
| timer.start(); |
| timer.trigger(); |
| // make sure that we got the timer error |
| Mockito.verify(listener1, Mockito.times(1)).receive(Mockito.any()); |
| Mockito.verify(listener2, Mockito.times(1)).receive(Mockito.any()); |
| } |
| } |