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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