Package org.apache.camel.model

Examples of org.apache.camel.model.OnExceptionDefinition

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        }

        // the goal is to find the exception with the same/closet inheritance level as the target exception being thrown
        int targetLevel = getInheritanceLevel(exception.getClass());
        // candidate is the best candidate found so far to return
        OnExceptionDefinition candidate = null;
        // difference in inheritance level between the current candidate and the thrown exception (target level)
        int candidateDiff = Integer.MAX_VALUE;

        // loop through all the entries and find the best candidates to use
        Set<Map.Entry<ExceptionPolicyKey, OnExceptionDefinition>> entries = exceptionPolicies.entrySet();
        for (Map.Entry<ExceptionPolicyKey, OnExceptionDefinition> entry : entries) {
            Class<?> clazz = entry.getKey().getExceptionClass();
            OnExceptionDefinition type = entry.getValue();

            // if OnException is route scoped then the current route (Exchange) must match
            // so we will not pick an OnException from another route
            if (exchange != null && exchange.getUnitOfWork() != null) {
                RouteDefinition route = exchange.getUnitOfWork().getRouteContext() != null ? exchange.getUnitOfWork().getRouteContext().getRoute() : null;
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     *
     * @param exceptions list of exceptions to catch
     * @return the builder
     */
    public OnExceptionDefinition onException(Class... exceptions) {
        OnExceptionDefinition last = null;
        for (Class ex : exceptions) {
            last = last == null ? onException(ex) : last.onException(ex);
        }
        return last != null ? last : onException(Exception.class);
    }
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        // store the original caused exception in a property, so we can restore it later
        exchange.setProperty(Exchange.EXCEPTION_CAUGHT, e);

        // find the error handler to use (if any)
        OnExceptionDefinition exceptionPolicy = getExceptionPolicy(exchange, e);
        if (exceptionPolicy != null) {
            data.currentRedeliveryPolicy = exceptionPolicy.createRedeliveryPolicy(exchange.getContext(), data.currentRedeliveryPolicy);
            data.handledPredicate = exceptionPolicy.getHandledPolicy();
            data.continuedPredicate = exceptionPolicy.getContinuedPolicy();
            data.retryWhilePredicate = exceptionPolicy.getRetryWhilePolicy();
            data.useOriginalInMessage = exceptionPolicy.isUseOriginalMessage();
            data.asyncDelayedRedelivery = exceptionPolicy.isAsyncDelayedRedelivery(exchange.getContext());

            // route specific failure handler?
            Processor processor = exceptionPolicy.getErrorHandler();
            if (processor != null) {
                data.failureProcessor = processor;
            }
            // route specific on redelivery?
            processor = exceptionPolicy.getOnRedelivery();
            if (processor != null) {
                data.onRedeliveryProcessor = processor;
            }
        }
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    /**
     * Attempts to invoke the handler for this particular exception if one is available
     */
    protected boolean customProcessorForException(Exchange exchange, Throwable exception) throws Exception {
        OnExceptionDefinition policy = getExceptionPolicy(exchange, exception);
        if (policy != null) {
            Processor processor = policy.getErrorHandler();
            if (processor != null) {
                processor.process(exchange);
                return true;
            }
        }
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        // store the original caused exception in a property, so we can restore it later
        exchange.setProperty(Exchange.EXCEPTION_CAUGHT, e);

        // find the error handler to use (if any)
        OnExceptionDefinition exceptionPolicy = getExceptionPolicy(exchange, e);
        if (exceptionPolicy != null) {
            data.currentRedeliveryPolicy = exceptionPolicy.createRedeliveryPolicy(exchange.getContext(), data.currentRedeliveryPolicy);
            data.handledPredicate = exceptionPolicy.getHandledPolicy();
            data.continuedPredicate = exceptionPolicy.getContinuedPolicy();
            data.retryWhilePredicate = exceptionPolicy.getRetryWhilePolicy();
            data.useOriginalInMessage = exceptionPolicy.isUseOriginalMessage();
            data.asyncDelayedRedelivery = exceptionPolicy.isAsyncDelayedRedelivery(exchange.getContext());

            // route specific failure handler?
            Processor processor = exceptionPolicy.getErrorHandler();
            if (processor != null) {
                data.failureProcessor = processor;
            }
            // route specific on redelivery?
            processor = exceptionPolicy.getOnRedelivery();
            if (processor != null) {
                data.onRedeliveryProcessor = processor;
            }
        }
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        // store the original caused exception in a property, so we can restore it later
        exchange.setProperty(Exchange.EXCEPTION_CAUGHT, e);

        // find the error handler to use (if any)
        OnExceptionDefinition exceptionPolicy = getExceptionPolicy(exchange, e);
        if (exceptionPolicy != null) {
            data.currentRedeliveryPolicy = exceptionPolicy.createRedeliveryPolicy(exchange.getContext(), data.currentRedeliveryPolicy);
            data.handledPredicate = exceptionPolicy.getHandledPolicy();
            data.continuedPredicate = exceptionPolicy.getContinuedPolicy();
            data.retryWhilePredicate = exceptionPolicy.getRetryWhilePolicy();
            data.useOriginalInMessage = exceptionPolicy.isUseOriginalMessage();

            // route specific failure handler?
            Processor processor = null;
            UnitOfWork uow = exchange.getUnitOfWork();
            if (uow != null && uow.getRouteContext() != null) {
                String routeId = uow.getRouteContext().getRoute().getId();
                processor = exceptionPolicy.getErrorHandler(routeId);
            } else if (!exceptionPolicy.getErrorHandlers().isEmpty()) {
                // note this should really not happen, but we have this code as a fail safe
                // to be backwards compatible with the old behavior
                log.warn("Cannot determine current route from Exchange with id: {}, will fallback and use first error handler.", exchange.getExchangeId());
                processor = exceptionPolicy.getErrorHandlers().iterator().next();
            }
            if (processor != null) {
                data.failureProcessor = processor;
            }

            // route specific on redelivery?
            processor = exceptionPolicy.getOnRedelivery();
            if (processor != null) {
                data.onRedeliveryProcessor = processor;
            }
        }
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    /**
     * Attempts to invoke the handler for this particular exception if one is available
     */
    protected boolean customProcessorForException(Exchange exchange, Throwable exception) throws Exception {
        OnExceptionDefinition policy = getExceptionPolicy(exchange, exception);
        if (policy != null) {
            Processor processor = policy.getErrorHandler();
            if (processor != null) {
                processor.process(exchange);
                return true;
            }
        }
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        // store the original caused exception in a property, so we can restore it later
        exchange.setProperty(Exchange.EXCEPTION_CAUGHT, e);

        // find the error handler to use (if any)
        OnExceptionDefinition exceptionPolicy = getExceptionPolicy(exchange, e);
        if (exceptionPolicy != null) {
            data.currentRedeliveryPolicy = exceptionPolicy.createRedeliveryPolicy(exchange.getContext(), data.currentRedeliveryPolicy);
            data.handledPredicate = exceptionPolicy.getHandledPolicy();
            data.continuedPredicate = exceptionPolicy.getContinuedPolicy();
            data.retryUntilPredicate = exceptionPolicy.getRetryUntilPolicy();
            data.useOriginalInMessage = exceptionPolicy.getUseOriginalMessagePolicy();

            // route specific failure handler?
            Processor processor = exceptionPolicy.getErrorHandler();
            if (processor != null) {
                data.failureProcessor = processor;
            }
            // route specific on redelivery?
            processor = exceptionPolicy.getOnRedelivery();
            if (processor != null) {
                data.onRedeliveryProcessor = processor;
            }
        }
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        boolean notGlobal = buffer.toString().endsWith(")");
        if (notGlobal) {
            buffer.append(".");
        }

        OnExceptionDefinition onException = (OnExceptionDefinition)processor;
        buffer.append(processor.getShortName()).append("(");
        List<Class> exceptions = onException.getExceptionClasses();
        for (Class excep : exceptions) {
            buffer.append(excep.getSimpleName()).append(".class");
            if (excep != exceptions.get(exceptions.size() - 1)) {
                buffer.append(", ");
            }
        }
        buffer.append(")");

        // render the redelivery policy
        if (onException.getRedeliveryPolicy() != null) {
            RedeliveryPolicyDefinition redelivery = onException.getRedeliveryPolicy();
            if (redelivery.getMaximumRedeliveries() != null) {
                int maxRedeliveries = redelivery.getMaximumRedeliveries();
                if (maxRedeliveries != 0) {
                    buffer.append(".maximumRedeliveries(").append(maxRedeliveries).append(")");
                }
            }
            if (redelivery.getRedeliveryDelay() != null) {
                long redeliverDelay = redelivery.getRedeliveryDelay();
                if (redeliverDelay != 1000) {
                    buffer.append(".redeliverDelay(").append(redeliverDelay).append(")");
                }
            }
            if (redelivery.getLogStackTrace() != null) {
                if (redelivery.getLogStackTrace()) {
                    buffer.append(".logStackTrace(true)");
                }
            }
        }

        // render the handled policy
        if (onException.getHandledPolicy() != null) {
            String handledPolicy = onException.getHandledPolicy().toString();
            if (handledPolicy.equals("false")) {
                buffer.append(".handled(").append(handledPolicy).append(")");
            }
        }

        List<ProcessorDefinition> branches = onException.getOutputs();
        for (ProcessorDefinition branch : branches) {
            SendDefinitionRenderer.render(buffer, branch);
        }
    }
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     * Gather all route scoped services from the given route, such as route scoped error handler.
     */
    private void doGetRouteScopedServices(List<Service> services, Route route) {
        for (ProcessorDefinition output : route.getRouteContext().getRoute().getOutputs()) {
            if (output instanceof OnExceptionDefinition) {
                OnExceptionDefinition onExceptionDefinition = (OnExceptionDefinition) output;
                if (onExceptionDefinition.isRouteScoped()) {
                    Processor errorHandler = onExceptionDefinition.getErrorHandler();
                    if (errorHandler != null && errorHandler instanceof Service) {
                        services.add((Service) errorHandler);
                    }
                }
            } else if (output instanceof OnCompletionDefinition) {
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Related Classes of org.apache.camel.model.OnExceptionDefinition

  • org.apache.camel.builder.ErrorHandlerBuilder
  • org.apache.camel.builder.RouteBuilder
  • org.apache.camel.Expression
  • org.apache.camel.impl.RouteService
  • org.apache.camel.language.constant.ConstantLanguage
  • org.apache.camel.Predicate
  • org.apache.camel.Processor
  • org.apache.camel.processor.CatchProcessor
  • org.apache.camel.processor.DeadLetterChannel
  • org.apache.camel.processor.DefaultErrorHandler
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