| /** |
| * 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.io.retry; |
| |
| import static org.apache.hadoop.io.retry.RetryPolicies.RETRY_FOREVER; |
| import static org.apache.hadoop.io.retry.RetryPolicies.TRY_ONCE_DONT_FAIL; |
| import static org.apache.hadoop.io.retry.RetryPolicies.TRY_ONCE_THEN_FAIL; |
| import static org.apache.hadoop.io.retry.RetryPolicies.retryByException; |
| import static org.apache.hadoop.io.retry.RetryPolicies.retryByRemoteException; |
| import static org.apache.hadoop.io.retry.RetryPolicies.retryUpToMaximumCountWithFixedSleep; |
| import static org.apache.hadoop.io.retry.RetryPolicies.retryUpToMaximumCountWithProportionalSleep; |
| import static org.apache.hadoop.io.retry.RetryPolicies.retryUpToMaximumTimeWithFixedSleep; |
| import static org.apache.hadoop.io.retry.RetryPolicies.exponentialBackoffRetry; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.hadoop.io.retry.UnreliableInterface.FatalException; |
| import org.apache.hadoop.io.retry.UnreliableInterface.UnreliableException; |
| import org.apache.hadoop.ipc.RemoteException; |
| |
| public class TestRetryProxy extends TestCase { |
| |
| private UnreliableImplementation unreliableImpl; |
| |
| @Override |
| protected void setUp() throws Exception { |
| unreliableImpl = new UnreliableImplementation(); |
| } |
| |
| public void testTryOnceThenFail() throws UnreliableException { |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, TRY_ONCE_THEN_FAIL); |
| unreliable.alwaysSucceeds(); |
| try { |
| unreliable.failsOnceThenSucceeds(); |
| fail("Should fail"); |
| } catch (UnreliableException e) { |
| // expected |
| } |
| } |
| |
| public void testTryOnceDontFail() throws UnreliableException { |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, TRY_ONCE_DONT_FAIL); |
| unreliable.alwaysSucceeds(); |
| unreliable.failsOnceThenSucceeds(); |
| try { |
| unreliable.failsOnceThenSucceedsWithReturnValue(); |
| fail("Should fail"); |
| } catch (UnreliableException e) { |
| // expected |
| } |
| } |
| |
| public void testRetryForever() throws UnreliableException { |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, RETRY_FOREVER); |
| unreliable.alwaysSucceeds(); |
| unreliable.failsOnceThenSucceeds(); |
| unreliable.failsTenTimesThenSucceeds(); |
| } |
| |
| public void testRetryUpToMaximumCountWithFixedSleep() throws UnreliableException { |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
| retryUpToMaximumCountWithFixedSleep(8, 1, TimeUnit.NANOSECONDS)); |
| unreliable.alwaysSucceeds(); |
| unreliable.failsOnceThenSucceeds(); |
| try { |
| unreliable.failsTenTimesThenSucceeds(); |
| fail("Should fail"); |
| } catch (UnreliableException e) { |
| // expected |
| } |
| } |
| |
| public void testRetryUpToMaximumTimeWithFixedSleep() throws UnreliableException { |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
| retryUpToMaximumTimeWithFixedSleep(80, 10, TimeUnit.NANOSECONDS)); |
| unreliable.alwaysSucceeds(); |
| unreliable.failsOnceThenSucceeds(); |
| try { |
| unreliable.failsTenTimesThenSucceeds(); |
| fail("Should fail"); |
| } catch (UnreliableException e) { |
| // expected |
| } |
| } |
| |
| public void testRetryUpToMaximumCountWithProportionalSleep() throws UnreliableException { |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
| retryUpToMaximumCountWithProportionalSleep(8, 1, TimeUnit.NANOSECONDS)); |
| unreliable.alwaysSucceeds(); |
| unreliable.failsOnceThenSucceeds(); |
| try { |
| unreliable.failsTenTimesThenSucceeds(); |
| fail("Should fail"); |
| } catch (UnreliableException e) { |
| // expected |
| } |
| } |
| |
| public void testExponentialRetry() throws UnreliableException { |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
| exponentialBackoffRetry(5, 1L, TimeUnit.NANOSECONDS)); |
| unreliable.alwaysSucceeds(); |
| unreliable.failsOnceThenSucceeds(); |
| try { |
| unreliable.failsTenTimesThenSucceeds(); |
| fail("Should fail"); |
| } catch (UnreliableException e) { |
| // expected |
| } |
| } |
| |
| public void testRetryByException() throws UnreliableException { |
| Map<Class<? extends Exception>, RetryPolicy> exceptionToPolicyMap = |
| Collections.<Class<? extends Exception>, RetryPolicy>singletonMap(FatalException.class, TRY_ONCE_THEN_FAIL); |
| |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
| retryByException(RETRY_FOREVER, exceptionToPolicyMap)); |
| unreliable.failsOnceThenSucceeds(); |
| try { |
| unreliable.alwaysFailsWithFatalException(); |
| fail("Should fail"); |
| } catch (FatalException e) { |
| // expected |
| } |
| } |
| |
| public void testRetryByRemoteException() throws UnreliableException { |
| Map<Class<? extends Exception>, RetryPolicy> exceptionToPolicyMap = |
| Collections.<Class<? extends Exception>, RetryPolicy>singletonMap(FatalException.class, TRY_ONCE_THEN_FAIL); |
| |
| UnreliableInterface unreliable = (UnreliableInterface) |
| RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
| retryByRemoteException(RETRY_FOREVER, exceptionToPolicyMap)); |
| try { |
| unreliable.alwaysFailsWithRemoteFatalException(); |
| fail("Should fail"); |
| } catch (RemoteException e) { |
| // expected |
| } |
| } |
| |
| } |