Examples of org.apache.camel.ConsumerTemplate

org.apache.camel.ConsumerTemplate
.apache.org/polling-consumer.html">Polling Consumer EIP. This is not the Event Driven Consumer EIP.
All methods throws {@link RuntimeCamelException} if consuming ofthe {@link Exchange} failed and an Exception occurred. The getCausemethod on {@link RuntimeCamelException} returns the wrapper original causedexception.
All the receiveBody methods will return the content according to this strategy
- throws {@link RuntimeCamelException} as stated above
- The fault.body if there is a fault message set and its not null
- The out.body if there is a out message set and its not null
- The in.body
Before using the template it must be started. And when you are done using the template, make sure to {@link #stop()} the template.

Important note on usage: See this FAQ entry before using, it applies to this {@link ConsumerTemplate} as well. @version


    @Autowired
    private CamelContext context;


    public void testHasTwoTemplates() {
        ConsumerTemplate lookup = context.getRegistry().lookup("myTemplate", ConsumerTemplate.class);
        assertNotNull("Should lookup producer template", lookup);


        ConsumerTemplate lookup2 = context.getRegistry().lookup("myOtherTemplate", ConsumerTemplate.class);
        assertNotNull("Should lookup producer template", lookup2);


        assertNotSame("Should not be same", lookup, lookup2);
    }

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    public void testHasTemplate() {
        assertNotNull("Should have injected a consumer template", template);
        assertNotNull("The template context should not be null", ((DefaultConsumerTemplate)template).getCamelContext());


        ConsumerTemplate lookup = context.getRegistry().lookup("consumerTemplate", ConsumerTemplate.class);
        assertNotNull("Should lookup consumer template", lookup);
    }

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    /**
     * Factory method to create a {@link org.apache.camel.ConsumerTemplate} to be injected into a POJO
     */
    protected ConsumerTemplate createInjectionConsumerTemplate(String endpointUri, String endpointRef, String injectionPointName) {
        ConsumerTemplate answer = new DefaultConsumerTemplate(getCamelContext());
        // start the template so its ready to use
        try {
            answer.start();
        } catch (Exception e) {
            throw ObjectHelper.wrapRuntimeCamelException(e);
        }
        return answer;
    }

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        context.getProperties().put(Exchange.MAXIMUM_CACHE_POOL_SIZE, "200");
        return context;
    }


    public void testCacheConsumers() throws Exception {
        ConsumerTemplate template = context.createConsumerTemplate();


        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());


        // test that we cache at most 500 producers to avoid it eating to much memory
        for (int i = 0; i < 203; i++) {
            Endpoint e = context.getEndpoint("direct:queue:" + i);
            template.receiveNoWait(e);
        }


        assertEquals("Size should be 200", 200, template.getCurrentCacheSize());
        template.stop();


        // should be 0
        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());
    }

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        String out = consumer.receiveBody("seda:foo", String.class);
        assertEquals("Bye World", out);
    }


    public void testCacheConsumers() throws Exception {
        ConsumerTemplate template = new DefaultConsumerTemplate(context);
        template.setMaximumCacheSize(500);
        template.start();


        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());


        // test that we cache at most 500 consumers to avoid it eating to much memory
        for (int i = 0; i < 503; i++) {
            Endpoint e = context.getEndpoint("direct:queue:" + i);
            template.receiveNoWait(e);
        }


        assertEquals("Size should be 500", 500, template.getCurrentCacheSize());
        template.stop();


        // should be 0
        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());
    }

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        // should be 0
        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());
    }


    public void testCacheConsumersFromContext() throws Exception {
        ConsumerTemplate template = context.createConsumerTemplate(500);


        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());


        // test that we cache at most 500 consumers to avoid it eating to much memory
        for (int i = 0; i < 503; i++) {
            Endpoint e = context.getEndpoint("direct:queue:" + i);
            template.receiveNoWait(e);
        }


        assertEquals("Size should be 500", 500, template.getCurrentCacheSize());
        template.stop();


        // should be 0
        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());
    }

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        // should be 0
        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());
    }


    public void testCacheConsumersFromContext() throws Exception {
        ConsumerTemplate template = context.createConsumerTemplate(500);


        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());


        // test that we cache at most 500 consumers to avoid it eating to much memory
        for (int i = 0; i < 503; i++) {
            Endpoint e = context.getEndpoint("direct:queue:" + i);
            template.receiveNoWait(e);
        }


        assertEquals("Size should be 500", 500, template.getCurrentCacheSize());
        template.stop();


        // should be 0
        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());
    }

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        String out = consumer.receiveBody("seda:foo", String.class);
        assertEquals("Bye World", out);
    }


    public void testCacheConsumers() throws Exception {
        ConsumerTemplate template = new DefaultConsumerTemplate(context);
        template.setMaximumCacheSize(500);
        template.start();


        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());


        // test that we cache at most 500 consumers to avoid it eating to much memory
        for (int i = 0; i < 503; i++) {
            Endpoint e = context.getEndpoint("direct:queue:" + i);
            template.receiveNoWait(e);
        }


        assertEquals("Size should be 500", 500, template.getCurrentCacheSize());
        template.stop();


        // should be 0
        assertEquals("Size should be 0", 0, template.getCurrentCacheSize());
    }

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    /**
     * Factory method to create a {@link org.apache.camel.ConsumerTemplate} to be injected into a POJO
     */
    protected ConsumerTemplate createInjectionConsumerTemplate(String endpointUri, String endpointRef, String injectionPointName) {
        ConsumerTemplate answer = new DefaultConsumerTemplate(getCamelContext());
        // start the template so its ready to use
        try {
            answer.start();
        } catch (Exception e) {
            throw ObjectHelper.wrapRuntimeCamelException(e);
        }
        return answer;
    }

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                            String name = exchange.getIn().getHeader(Exchange.FILE_NAME_ONLY, String.class);
                            name = FileUtil.stripExt(name) + ".dat";


                            // use a consumer template to get the data file
                            Exchange data = null;
                            ConsumerTemplate con = exchange.getContext().createConsumerTemplate();
                            try {
                                // try to get the data file
                                data = con.receive("file://target/enrichdata?move=.done&fileName=" + name, 5000);
                            } finally {
                                // stop the consumer as it does not need to poll for files anymore
                                con.stop();
                            }


                            // if we found the data file then process it by sending it to the direct:data endpoint
                            if (data != null) {
                                template.send("direct:data", data);

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Related Classes of org.apache.camel.ConsumerTemplate

org.apache.camel.component.file.FileConsumePollEnrichFileUsingProcessorTest

org.apache.camel.impl.CamelPostProcessorHelper

org.apache.camel.impl.DefaultConsumerTemplateTest

org.apache.camel.impl.DefaultConsumerTemplateWithCustomCacheMaxSizeTest

org.apache.camel.issues.RedeliveryErrorHandlerAsyncDelayedTwoCamelContextIssueTest

org.apache.camel.itest.jetty.JettyMulticastJmsFileTest

org.apache.camel.spring.config.ConsumerTemplateAlreadyExistTest

org.apache.camel.spring.config.ConsumerTemplateAutoRegisterTest

org.apache.camel.spring.config.ConsumerTemplateHasTwoTemplatesTest

org.apache.camel.spring.config.ConsumerTemplateMaximumCacheSizeTest

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