/**
* 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.camel.processor.aggregator;
import junit.framework.TestCase;
import org.apache.camel.processor.aggregate.OptimisticLockRetryPolicy;
/**
* @version
*/
public class OptimisticLockRetryPolicyTest extends TestCase {
private static long precision = 5L; // give or take 5ms
public void testRandomBackOff() throws Exception {
OptimisticLockRetryPolicy policy = new OptimisticLockRetryPolicy();
policy.setRandomBackOff(true);
policy.setExponentialBackOff(false);
policy.setMaximumRetryDelay(500L);
for (int i = 0; i < 10; i++) {
long start = System.currentTimeMillis();
policy.doDelay(i);
long elapsed = System.currentTimeMillis() - start;
assertTrue(elapsed <= policy.getMaximumRetryDelay() + precision && elapsed >= 0);
}
}
public void testExponentialBackOff() throws Exception {
OptimisticLockRetryPolicy policy = new OptimisticLockRetryPolicy();
policy.setRandomBackOff(false);
policy.setExponentialBackOff(true);
policy.setMaximumRetryDelay(0L);
policy.setRetryDelay(50L);
for (int i = 0; i < 10; i++) {
long start = System.currentTimeMillis();
policy.doDelay(i);
long elapsed = System.currentTimeMillis() - start;
assertTrue(elapsed >= (policy.getRetryDelay() << i) - precision);
assertTrue(elapsed <= (policy.getRetryDelay() << i) + precision);
}
}
public void testExponentialBackOffMaximumRetryDelay() throws Exception {
OptimisticLockRetryPolicy policy = new OptimisticLockRetryPolicy();
policy.setRandomBackOff(false);
policy.setExponentialBackOff(true);
policy.setMaximumRetryDelay(200L);
policy.setRetryDelay(50L);
for (int i = 0; i < 10; i++) {
long start = System.currentTimeMillis();
policy.doDelay(i);
long elapsed = System.currentTimeMillis() - start;
switch (i) {
case 0:
assertTrue(elapsed <= 50 + precision);
assertTrue(elapsed >= 50 - precision);
break;
case 1:
assertTrue(elapsed <= 100 + precision);
assertTrue(elapsed >= 100 - precision);
break;
default:
assertTrue(elapsed <= 200 + precision);
assertTrue(elapsed >= 200 - precision);
break;
}
}
}
public void testRetryDelay() throws Exception {
OptimisticLockRetryPolicy policy = new OptimisticLockRetryPolicy();
policy.setRandomBackOff(false);
policy.setExponentialBackOff(false);
policy.setMaximumRetryDelay(0L);
policy.setRetryDelay(50L);
for (int i = 0; i < 10; i++) {
long start = System.currentTimeMillis();
policy.doDelay(i);
long elapsed = System.currentTimeMillis() - start;
assertTrue(elapsed <= policy.getRetryDelay() + precision);
assertTrue(elapsed >= policy.getRetryDelay() - precision);
}
}
public void testMaximumRetries() throws Exception {
OptimisticLockRetryPolicy policy = new OptimisticLockRetryPolicy();
policy.setRandomBackOff(false);
policy.setExponentialBackOff(false);
policy.setMaximumRetryDelay(0L);
policy.setMaximumRetries(2);
policy.setRetryDelay(50L);
for (int i = 0; i < 10; i++) {
switch (i) {
case 0:
case 1:
assertTrue(policy.shouldRetry(i));
break;
default:
assertFalse(policy.shouldRetry(i));
}
}
}
}