/**
* 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;
public class OptimisticLockRetryPolicyTest extends TestCase {
private static long precision = 10L; // give or take 10ms
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 elapsed = doDelay(policy, i);
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 < 6; i++) {
long elapsed = doDelay(policy, i);
assertDelay(50L << i, elapsed);
}
}
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 elapsed = doDelay(policy, i);
switch (i) {
case 0:
assertDelay(50L, elapsed);
break;
case 1:
assertDelay(100L, elapsed);
break;
default:
assertDelay(200L, elapsed);
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 elapsed = doDelay(policy, i);
assertDelay(50L, elapsed);
}
}
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));
}
}
}
private long doDelay(OptimisticLockRetryPolicy policy, int i) throws InterruptedException {
long start = System.currentTimeMillis();
policy.doDelay(i);
long elapsed = System.currentTimeMillis() - start;
return elapsed;
}
private void assertDelay(long expectedDelay, long actualDelay) {
assertTrue(actualDelay <= expectedDelay + precision);
assertTrue(actualDelay >= expectedDelay - precision);
}
}