Examples of org.apache.camel.processor.DelegateProcessor

org.apache.camel.processor.DelegateProcessor
A Delegate pattern which delegates processing to a nested processor which can be useful for implementation inheritance when writing an {@link Policy} @version $Revision: 519941 $

     * @param category the logging category trace messages will sent to.
     * @return
     */
    public ProcessorType trace(String category) {
        final Log log = LogFactory.getLog(category);
        return intercept(new DelegateProcessor() {
            @Override
            public void process(Exchange exchange) throws Exception {
                log.trace(exchange);
                processNext(exchange);
            }

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        if (target == null) {
            throw new RuntimeCamelException("target provided.");
        }


        // Interceptors are optional
        DelegateProcessor first = null;
        DelegateProcessor last = null;
        List<InterceptorType> interceptors = new ArrayList<InterceptorType>(routeContext.getRoute()
            .getInterceptors());
        List<InterceptorType> list = getInterceptors();
        for (InterceptorType interceptorType : list) {
            if (!interceptors.contains(interceptorType)) {
                interceptors.add(interceptorType);
            }
        }
        for (InterceptorType interceptorRef : interceptors) {
            DelegateProcessor p = interceptorRef.createInterceptor(routeContext);
            if (first == null) {
                first = p;
            }
            if (last != null) {
                last.setProcessor(p);

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            assertSendToProcessor(endpoints.get(1), "seda:b");
        }
    }


    protected List<Route> buildRouteWithInterceptor() throws Exception {
        interceptor1 = new DelegateProcessor() {
        };


        // START SNIPPET: e7
        interceptor2 = new MyInterceptorProcessor();

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        for (Route route : routes) {
            Endpoint key = route.getEndpoint();
            assertEquals("From endpoint", "seda:a", key.getEndpointUri());
            Processor processor = getProcessorWithoutErrorHandler(route);


            DelegateProcessor p1 = assertIsInstanceOf(DelegateProcessor.class, processor);
            processor = p1.getProcessor();


            DelegateProcessor p2 = assertIsInstanceOf(DelegateProcessor.class, processor);


            assertSendTo(p2.getProcessor(), "seda:d");
        }
    }

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    public void testRouteWithInterceptor() throws Exception {


        CamelContext container = new DefaultCamelContext();
        final ArrayList<String> order = new ArrayList<String>();


        final DelegateProcessor interceptor1 = new DelegateProcessor() {
            @Override
            public void process(Exchange exchange) throws Exception {
                order.add("START:1");
                super.process(exchange);
                order.add("END:1");
            }
        };
        final DelegateProcessor interceptor2 = new DelegateProcessor() {
            @Override
            public void process(Exchange exchange) throws Exception {
                order.add("START:2");
                super.process(exchange);
                order.add("END:2");

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                Policy notsupported = new SpringTransactionPolicy(bean(TransactionTemplate.class, "PROPAGATION_NOT_SUPPORTED"));
                Policy requirenew = new SpringTransactionPolicy(bean(TransactionTemplate.class, "PROPAGATION_REQUIRES_NEW"));


                Policy rollback = new Policy() {
                    public Processor wrap(Processor processor) {
                        return new DelegateProcessor(processor) {
                            @Override
                            public void process(Exchange exchange) throws Exception {
                                processNext(exchange);
                                throw new RuntimeException("rollback");
                            }


                            @Override
                            public String toString() {
                                return "rollback(" + getProcessor() + ")";
                            }
                        };
                    }
                };


                Policy catchRollback = new Policy() {
                    public Processor wrap(Processor processor) {
                        return new DelegateProcessor(processor) {
                            @Override
                            public void process(Exchange exchange) {
                                try {
                                    processNext(exchange);
                                } catch (Throwable ignore) {

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     * @deprecated Please use <a href="http://activemq.apache.org/camel/tracer.html>Tracer Support</a>
     * instead. Will be removed in Camel 2.0.
     */
    public Type trace(String category) {
        final Log log = LogFactory.getLog(category);
        return intercept(new DelegateProcessor() {
            @Override
            public void process(Exchange exchange) throws Exception {
                log.trace(exchange);
                processNext(exchange);
            }

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        // lets reverse the list so we apply the inner interceptors first
        Collections.reverse(list);
        Set<Processor> interceptors = new HashSet<Processor>();
        interceptors.add(target);
        for (InterceptorType interceptorType : list) {
            DelegateProcessor interceptor = interceptorType.createInterceptor(routeContext);
            if (!interceptors.contains(interceptor)) {
                interceptors.add(interceptor);
                if (interceptor.getProcessor() != null) {
                    LOG.warn("Interceptor " + interceptor + " currently wraps target "
                            + interceptor.getProcessor()
                            + " is attempting to change target " + target
                            + " new wrapping has been denied.");
                } else {
                    interceptor.setProcessor(target);
                    target = interceptor;
                }
            }
        }
        return target;

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            assertSendToProcessor(endpoints.get(1), "seda:b");
        }
    }


    protected List<Route> buildRouteWithInterceptor() throws Exception {
        interceptor1 = new DelegateProcessor() {
        };


        // START SNIPPET: e7
        interceptor2 = new MyInterceptorProcessor();

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                InstrumentationProcessor interceptor =
                    assertIsInstanceOf(InstrumentationProcessor.class, processor);
                processor = interceptor.getProcessor();
            }


            DelegateProcessor p1 = assertIsInstanceOf(DelegateProcessor.class, processor);
            processor = p1.getProcessor();


            DelegateProcessor p2 = assertIsInstanceOf(DelegateProcessor.class, processor);


            assertSendTo(p2.getProcessor(), "seda:d");
        }
    }

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