[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.io.retry; |
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| 20 | |
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| 21 | import static org.apache.hadoop.io.retry.RetryPolicies.RETRY_FOREVER; |
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| 22 | import static org.apache.hadoop.io.retry.RetryPolicies.TRY_ONCE_DONT_FAIL; |
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| 23 | import static org.apache.hadoop.io.retry.RetryPolicies.TRY_ONCE_THEN_FAIL; |
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| 24 | import static org.apache.hadoop.io.retry.RetryPolicies.retryByException; |
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| 25 | import static org.apache.hadoop.io.retry.RetryPolicies.retryByRemoteException; |
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| 26 | import static org.apache.hadoop.io.retry.RetryPolicies.retryUpToMaximumCountWithFixedSleep; |
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| 27 | import static org.apache.hadoop.io.retry.RetryPolicies.retryUpToMaximumCountWithProportionalSleep; |
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| 28 | import static org.apache.hadoop.io.retry.RetryPolicies.retryUpToMaximumTimeWithFixedSleep; |
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| 29 | import static org.apache.hadoop.io.retry.RetryPolicies.exponentialBackoffRetry; |
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| 30 | |
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| 31 | import java.util.Collections; |
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| 32 | import java.util.Map; |
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| 33 | import java.util.concurrent.TimeUnit; |
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| 34 | |
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| 35 | import junit.framework.TestCase; |
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| 36 | |
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| 37 | import org.apache.hadoop.io.retry.UnreliableInterface.FatalException; |
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| 38 | import org.apache.hadoop.io.retry.UnreliableInterface.UnreliableException; |
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| 39 | import org.apache.hadoop.ipc.RemoteException; |
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| 40 | |
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| 41 | public class TestRetryProxy extends TestCase { |
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| 42 | |
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| 43 | private UnreliableImplementation unreliableImpl; |
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| 44 | |
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| 45 | @Override |
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| 46 | protected void setUp() throws Exception { |
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| 47 | unreliableImpl = new UnreliableImplementation(); |
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| 48 | } |
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| 49 | |
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| 50 | public void testTryOnceThenFail() throws UnreliableException { |
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| 51 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 52 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, TRY_ONCE_THEN_FAIL); |
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| 53 | unreliable.alwaysSucceeds(); |
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| 54 | try { |
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| 55 | unreliable.failsOnceThenSucceeds(); |
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| 56 | fail("Should fail"); |
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| 57 | } catch (UnreliableException e) { |
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| 58 | // expected |
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| 59 | } |
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| 60 | } |
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| 61 | |
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| 62 | public void testTryOnceDontFail() throws UnreliableException { |
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| 63 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 64 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, TRY_ONCE_DONT_FAIL); |
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| 65 | unreliable.alwaysSucceeds(); |
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| 66 | unreliable.failsOnceThenSucceeds(); |
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| 67 | try { |
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| 68 | unreliable.failsOnceThenSucceedsWithReturnValue(); |
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| 69 | fail("Should fail"); |
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| 70 | } catch (UnreliableException e) { |
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| 71 | // expected |
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| 72 | } |
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| 73 | } |
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| 74 | |
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| 75 | public void testRetryForever() throws UnreliableException { |
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| 76 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 77 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, RETRY_FOREVER); |
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| 78 | unreliable.alwaysSucceeds(); |
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| 79 | unreliable.failsOnceThenSucceeds(); |
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| 80 | unreliable.failsTenTimesThenSucceeds(); |
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| 81 | } |
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| 82 | |
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| 83 | public void testRetryUpToMaximumCountWithFixedSleep() throws UnreliableException { |
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| 84 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 85 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
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| 86 | retryUpToMaximumCountWithFixedSleep(8, 1, TimeUnit.NANOSECONDS)); |
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| 87 | unreliable.alwaysSucceeds(); |
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| 88 | unreliable.failsOnceThenSucceeds(); |
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| 89 | try { |
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| 90 | unreliable.failsTenTimesThenSucceeds(); |
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| 91 | fail("Should fail"); |
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| 92 | } catch (UnreliableException e) { |
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| 93 | // expected |
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| 94 | } |
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| 95 | } |
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| 96 | |
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| 97 | public void testRetryUpToMaximumTimeWithFixedSleep() throws UnreliableException { |
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| 98 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 99 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
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| 100 | retryUpToMaximumTimeWithFixedSleep(80, 10, TimeUnit.NANOSECONDS)); |
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| 101 | unreliable.alwaysSucceeds(); |
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| 102 | unreliable.failsOnceThenSucceeds(); |
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| 103 | try { |
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| 104 | unreliable.failsTenTimesThenSucceeds(); |
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| 105 | fail("Should fail"); |
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| 106 | } catch (UnreliableException e) { |
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| 107 | // expected |
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| 108 | } |
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| 109 | } |
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| 110 | |
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| 111 | public void testRetryUpToMaximumCountWithProportionalSleep() throws UnreliableException { |
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| 112 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 113 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
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| 114 | retryUpToMaximumCountWithProportionalSleep(8, 1, TimeUnit.NANOSECONDS)); |
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| 115 | unreliable.alwaysSucceeds(); |
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| 116 | unreliable.failsOnceThenSucceeds(); |
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| 117 | try { |
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| 118 | unreliable.failsTenTimesThenSucceeds(); |
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| 119 | fail("Should fail"); |
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| 120 | } catch (UnreliableException e) { |
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| 121 | // expected |
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| 122 | } |
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| 123 | } |
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| 124 | |
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| 125 | public void testExponentialRetry() throws UnreliableException { |
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| 126 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 127 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
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| 128 | exponentialBackoffRetry(5, 1L, TimeUnit.NANOSECONDS)); |
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| 129 | unreliable.alwaysSucceeds(); |
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| 130 | unreliable.failsOnceThenSucceeds(); |
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| 131 | try { |
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| 132 | unreliable.failsTenTimesThenSucceeds(); |
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| 133 | fail("Should fail"); |
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| 134 | } catch (UnreliableException e) { |
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| 135 | // expected |
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| 136 | } |
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| 137 | } |
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| 138 | |
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| 139 | public void testRetryByException() throws UnreliableException { |
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| 140 | Map<Class<? extends Exception>, RetryPolicy> exceptionToPolicyMap = |
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| 141 | Collections.<Class<? extends Exception>, RetryPolicy>singletonMap(FatalException.class, TRY_ONCE_THEN_FAIL); |
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| 142 | |
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| 143 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 144 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
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| 145 | retryByException(RETRY_FOREVER, exceptionToPolicyMap)); |
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| 146 | unreliable.failsOnceThenSucceeds(); |
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| 147 | try { |
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| 148 | unreliable.alwaysFailsWithFatalException(); |
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| 149 | fail("Should fail"); |
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| 150 | } catch (FatalException e) { |
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| 151 | // expected |
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| 152 | } |
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| 153 | } |
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| 154 | |
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| 155 | public void testRetryByRemoteException() throws UnreliableException { |
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| 156 | Map<Class<? extends Exception>, RetryPolicy> exceptionToPolicyMap = |
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| 157 | Collections.<Class<? extends Exception>, RetryPolicy>singletonMap(FatalException.class, TRY_ONCE_THEN_FAIL); |
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| 158 | |
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| 159 | UnreliableInterface unreliable = (UnreliableInterface) |
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| 160 | RetryProxy.create(UnreliableInterface.class, unreliableImpl, |
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| 161 | retryByRemoteException(RETRY_FOREVER, exceptionToPolicyMap)); |
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| 162 | try { |
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| 163 | unreliable.alwaysFailsWithRemoteFatalException(); |
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| 164 | fail("Should fail"); |
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| 165 | } catch (RemoteException e) { |
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| 166 | // expected |
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| 167 | } |
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| 168 | } |
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| 169 | |
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| 170 | } |
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