Examples of org.apache.camel.processor.aggregate.OptimisticLockRetryPolicy

org.apache.camel.processor.aggregate.OptimisticLockRetryPolicy

Class to control how failed optimistic locks are tried. This policy supports random and exponential back-off delays.

If {@code randomBackOff} is enabled and a value is supplied for {@code retryDelay} the value will be ignored.

If {@code randomBackOff} is enabled and no value is set for {@code maximumRetryDelay}, a default value of 1000ms will be used, the random delay will be between 0 and 1000 milliseconds.

If both {@code randomBackOff} and {@code exponentialBackOff} are enabled, {@code exponentialBackOff} will take precedence.

If {@code exponentialBackOff} is enabled and a value is set for {@code maximumRetryDelay}, the retry delay will keep doubling in value until it reaches or exceeds {@code maximumRetryDelay}. After it has reached or exceeded {@code maximumRetryDelay}the value of {@code maximumRetryDelay} will be used as the retry delay.

If both {@code exponentialBackOff} and {@code randomBackOff} are disabled, the value of {@code retryDelay} will be usedas the retry delay and remain constant through all the retry attempts.

If the value of {@code maximumRetries} is set above zero, retry attempts will stop at the value specified.

The default behaviour of this policy is to retry forever and exponentially increase the back-off delay starting with 50ms. @version

            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));
            }
        }
    }


    public OptimisticLockRetryPolicyDefinition() {
    }


    public OptimisticLockRetryPolicy createOptimisticLockRetryPolicy() {
        OptimisticLockRetryPolicy policy = new OptimisticLockRetryPolicy();
        if (maximumRetries != null) {
            policy.setMaximumRetries(maximumRetries);
        }
        if (retryDelay != null) {
            policy.setRetryDelay(retryDelay);
        }
        if (maximumRetryDelay != null) {
            policy.setMaximumRetryDelay(maximumRetryDelay);
        }
        if (exponentialBackOff != null) {
            policy.setExponentialBackOff(exponentialBackOff);
        }
        if (randomBackOff != null) {
            policy.setRandomBackOff(randomBackOff);
        }
        return policy;
    }

Examples of org.apache.camel.processor.aggregate.OptimisticLockRetryPolicy

Related Classes of org.apache.camel.processor.aggregate.OptimisticLockRetryPolicy