Examples of org.apache.camel.processor.RedeliveryPolicy

org.apache.camel.processor.RedeliveryPolicy
.apache.org/dead-letter-channel.html">Dead Letter Channel
The default values are:
- maximumRedeliveries = 0
- redeliveryDelay = 1000L (the initial delay)
- maximumRedeliveryDelay = 60 * 1000L
- asyncDelayedRedelivery = false
- backOffMultiplier = 2
- useExponentialBackOff = false
- collisionAvoidanceFactor = 0.15d
- useCollisionAvoidance = false
- retriesExhaustedLogLevel = LoggingLevel.ERROR
- retryAttemptedLogLevel = LoggingLevel.DEBUG
- logRetryAttempted = true
- logRetryStackTrace = false
- logStackTrace = true
- logHandled = false
- logExhausted = true
- logExhaustedMessageHistory = true
Setting the maximumRedeliveries to a negative value such as -1 will then always redeliver (unlimited). Setting the maximumRedeliveries to 0 will disable redelivery.
This policy can be configured either by one of the following two settings:
- using conventional options, using all the options defined above
- using delay pattern to declare intervals for delays
Note: If using delay patterns then the following options is not used (delay, backOffMultiplier, useExponentialBackOff, useCollisionAvoidance)
Using delay pattern:
The delay pattern syntax is: limit:delay;limit 2:delay 2;limit 3:delay 3;...;limit N:delay N.
How it works is best illustrate with an example with this pattern: delayPattern=5:1000;10:5000:20:20000
The delays will be for attempt in range 0..4 = 0 millis, 5..9 = 1000 millis, 10..19 = 5000 millis, >= 20 = 20000 millis.
If you want to set a starting delay, then use 0 as the first limit, eg: 0:1000;5:5000 will use 1 sec delay until attempt number 5 where it will use 5 seconds going forward. @version

    public RedeliveryPolicy createRedeliveryPolicy(CamelContext context, RedeliveryPolicy parentPolicy) {
        if (redeliveryPolicy != null) {
            return redeliveryPolicy.createRedeliveryPolicy(context, parentPolicy);
        } else if (errorHandler != null) {
            // lets create a new error handler that has no retries
            RedeliveryPolicy answer = parentPolicy.copy();
            answer.setMaximumRedeliveries(0);
            return answer;
        }
        return parentPolicy;
    }

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        return PredicateBuilder.toPredicate(ExpressionBuilder.constantExpression(true));
    }


    @Override
    protected RedeliveryPolicy createRedeliveryPolicy() {
        return new RedeliveryPolicy();
    }

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        // should NOT be handled by default for default error handler
        return PredicateBuilder.toPredicate(ExpressionBuilder.constantExpression(false));
    }


    protected RedeliveryPolicy createRedeliveryPolicy() {
        RedeliveryPolicy policy = new RedeliveryPolicy();
        policy.disableRedelivery();
        policy.setRedeliveryDelay(0);
        return policy;
    }

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            if (redeliveryPolicy != null) {
                handler.setRedeliveryPolicy(redeliveryPolicy.createRedeliveryPolicy(getCamelContext(), null));
            }
            if (redeliveryPolicyRef != null) {
                // lookup redelivery
                RedeliveryPolicy policy = CamelContextHelper.mandatoryLookup(getCamelContext(), redeliveryPolicyRef, RedeliveryPolicy.class);
                handler.setRedeliveryPolicy(policy);
            }
            if (onRedeliveryRef != null) {
                handler.setOnRedelivery(lookup(onRedeliveryRef, Processor.class));
            }

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        if (redeliveryPolicy != null) {
            return redeliveryPolicy.createRedeliveryPolicy(context, parentPolicy);
        } else if (errorHandler != null) {
            // lets create a new error handler that has no retries
            RedeliveryPolicy answer = parentPolicy.copy();
            answer.setMaximumRedeliveries(0);
            return answer;
        }
        return parentPolicy;
    }

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    public RedeliveryPolicy createRedeliveryPolicy(RedeliveryPolicy parentPolicy) {
        if (redeliveryPolicy != null) {
            return redeliveryPolicy.createRedeliveryPolicy(parentPolicy);
        } else if (errorHandler != null) {
            // lets create a new error handler that has no retries
            RedeliveryPolicy answer = parentPolicy.copy();
            answer.setMaximumRedeliveries(0);
            return answer;
        }
        return parentPolicy;
    }

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            EventDrivenConsumerRoute consumerRoute = assertIsInstanceOf(EventDrivenConsumerRoute.class, route);
            Processor processor = consumerRoute.getProcessor();


            DeadLetterChannel deadLetterChannel = assertIsInstanceOf(DeadLetterChannel.class, processor);


            RedeliveryPolicy redeliveryPolicy = deadLetterChannel.getRedeliveryPolicy();


            assertEquals("getMaximumRedeliveries()", 2, redeliveryPolicy.getMaximumRedeliveries());
            assertEquals("isUseExponentialBackOff()", true, redeliveryPolicy.isUseExponentialBackOff());
        }
    }

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    private Double collisionAvoidanceFactor;
    private Boolean useCollisionAvoidance;




    public RedeliveryPolicy createRedeliveryPolicy(RedeliveryPolicy parentPolicy) {
        RedeliveryPolicy answer =  parentPolicy.copy();


        // copy across the properties - if they are set
        if (maximumRedeliveries != null) {
            answer.setMaximumRedeliveries(maximumRedeliveries);
        }
        if (initialRedeliveryDelay != null) {
            answer.setInitialRedeliveryDelay(initialRedeliveryDelay);
        }
        if (backOffMultiplier != null) {
            answer.setBackOffMultiplier(backOffMultiplier);
        }
        if (useExponentialBackOff != null) {
            answer.setUseExponentialBackOff(useExponentialBackOff);
        }
        if (collisionAvoidanceFactor != null) {
            answer.setCollisionAvoidanceFactor(collisionAvoidanceFactor);
        }
        if (useCollisionAvoidance != null) {
            answer.setUseCollisionAvoidance(useCollisionAvoidance);
        }
        return answer;
    }

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    }
    
    public void testDefaultErrorHandler() {
        DefaultErrorHandlerBuilder errorHandler = (DefaultErrorHandlerBuilder) ctx.getBean("defaultErrorHandler");
        assertNotNull(errorHandler);
        RedeliveryPolicy policy = errorHandler.getRedeliveryPolicy();
        assertNotNull(policy);
        assertEquals("Wrong maximumRedeliveries", 2, policy.getMaximumRedeliveries());
        assertEquals("Wrong redeliveryDelay", 0, policy.getRedeliveryDelay());
        assertEquals("Wrong logStackTrace", false, policy.isLogStackTrace());
        
        errorHandler = (DefaultErrorHandlerBuilder) ctx.getBean("errorHandler");
        assertNotNull(errorHandler);
    }

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    public void testDeadLetterErrorHandler() {
        DeadLetterChannelBuilder errorHandler = (DeadLetterChannelBuilder) ctx.getBean("deadLetterErrorHandler");
        assertNotNull(errorHandler);
        assertEquals("Get wrong deadletteruri", "log:dead", errorHandler.getDeadLetterUri());
        RedeliveryPolicy policy = errorHandler.getRedeliveryPolicy();
        assertNotNull(policy);
        assertEquals("Wrong maximumRedeliveries", 2, policy.getMaximumRedeliveries());
        assertEquals("Wrong redeliveryDelay", 1000, policy.getRedeliveryDelay());
        assertEquals("Wrong logStackTrace", true, policy.isLogHandled());
    }

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org.apache.camel.blueprint.CamelErrorHandlerFactoryBean

org.apache.camel.builder.ContextErrorHandlerTest

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org.apache.camel.builder.DefaultErrorHandlerBuilder

org.apache.camel.builder.ErrorHandlerTest

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org.apache.camel.core.xml.AbstractCamelRedeliveryPolicyFactoryBean

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