Package org.apache.camel

Examples of org.apache.camel.PollingConsumer

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        context.addService(cache);

        template.sendBody("direct:start", "Hello World");

        Endpoint endpoint = context.getEndpoint("seda:queue");
        PollingConsumer consumer = cache.getConsumer(endpoint);
        Exchange out = consumer.receive(3000);
        assertNotNull("Should got an exchange", out);
        assertEquals("Hello World", out.getIn().getBody());

        // get the stats for the route
        MBeanServer mbeanServer = getMBeanServer();
        Set<ObjectName> set = mbeanServer.queryNames(new ObjectName("*:type=services,*"), null);
        List<ObjectName> list = new ArrayList<ObjectName>(set);
        ObjectName on = null;
        for (ObjectName name : list) {
            if (name.getCanonicalName().contains("ConsumerCache")) {
                on = name;
                break;
            }
        }

        assertNotNull("Should have found ConsumerCache", on);

        Integer max = (Integer) mbeanServer.getAttribute(on, "MaximumCacheSize");
        assertEquals(1000, max.intValue());

        Integer current = (Integer) mbeanServer.getAttribute(on, "Size");
        assertEquals(1, current.intValue());

        String source = (String) mbeanServer.getAttribute(on, "Source");
        assertNotNull(source);
        assertTrue(source.contains("testManageConsumerCache"));

        // purge
        mbeanServer.invoke(on, "purge", null, null);

        current = (Integer) mbeanServer.getAttribute(on, "Size");
        assertEquals(0, current.intValue());

        // stop the consumer as it was purged from the cache
        // so we need to manually stop it
        consumer.stop();
        cache.stop();
    }
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        return new LRUSoftCache<String, PollingConsumer>(cacheSize);
    }

    public synchronized PollingConsumer getConsumer(Endpoint endpoint) {
        String key = endpoint.getEndpointUri();
        PollingConsumer answer = consumers.get(key);
        if (answer == null) {
            try {
                answer = endpoint.createPollingConsumer();
                answer.start();
            } catch (Exception e) {
                throw new FailedToCreateConsumerException(endpoint, e);
            }

            boolean singleton = true;
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    }

    public Exchange receive(Endpoint endpoint) {
        LOG.debug("<<<< {}", endpoint);

        PollingConsumer consumer = getConsumer(endpoint);
        return consumer.receive();
    }
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    }

    public Exchange receive(Endpoint endpoint, long timeout) {
        LOG.debug("<<<< {}", endpoint);

        PollingConsumer consumer = getConsumer(endpoint);
        return consumer.receive(timeout);
    }
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    }

    public Exchange receiveNoWait(Endpoint endpoint) {
        LOG.debug("<<<< {}", endpoint);

        PollingConsumer consumer = getConsumer(endpoint);
        return consumer.receiveNoWait();
    }
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        // use another thread for polling consumer to demonstrate that we can wait before
        // the message is sent to the quueue
        Executors.newSingleThreadExecutor().execute(new Runnable() {
            public void run() {
                try {
                    PollingConsumer consumer = context.getEndpoint("activemq:queue.start").createPollingConsumer();
                    consumer.start();
                    Exchange exchange = consumer.receive();
                    String body = exchange.getIn().getBody(String.class);
                    template.sendBody("activemq:queue.foo", body + " Claus");
                    consumer.stop();
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        });
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     * Creates a {@link PollingConsumer} and polls all pending messages on the endpoint
     * and invokes the given {@link Processor} to process each {@link Exchange} and then closes
     * down the consumer and throws any exceptions thrown.
     */
    public static void pollEndpoint(Endpoint endpoint, Processor processor, long timeout) throws Exception {
        PollingConsumer consumer = endpoint.createPollingConsumer();
        try {
            consumer.start();

            while (true) {
                Exchange exchange = consumer.receive(timeout);
                if (exchange == null) {
                    break;
                } else {
                    processor.process(exchange);
                }
            }
        } finally {
            try {
                consumer.stop();
            } catch (Exception e) {
                LOG.warn("Failed to stop PollingConsumer: " + e, e);
            }
        }
    }
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    /**
     * Factory method to create a started {@link org.apache.camel.PollingConsumer} to be injected into a POJO
     */
    protected PollingConsumer createInjectionPollingConsumer(Endpoint endpoint) {
        try {
            PollingConsumer pollingConsumer = endpoint.createPollingConsumer();
            startService(pollingConsumer);
            return pollingConsumer;
        } catch (Exception e) {
            throw ObjectHelper.wrapRuntimeCamelException(e);
        }
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     * Creates a {@link PollingConsumer} and polls all pending messages on the endpoint
     * and invokes the given {@link Processor} to process each {@link Exchange} and then closes
     * down the consumer and throws any exceptions thrown.
     */
    public static void pollEndpoint(Endpoint endpoint, Processor processor, long timeout) throws Exception {
        PollingConsumer consumer = endpoint.createPollingConsumer();
        try {
            consumer.start();

            while (true) {
                Exchange exchange = consumer.receive(timeout);
                if (exchange == null) {
                    break;
                } else {
                    processor.process(exchange);
                }
            }
        } finally {
            try {
                consumer.stop();
            } catch (Exception e) {
                LOG.warn("Failed to stop PollingConsumer: " + e, e);
            }
        }
    }
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    private final Map<String, PollingConsumer> consumers = new HashMap<String, PollingConsumer>();

    public synchronized PollingConsumer getConsumer(Endpoint endpoint) {
        String key = endpoint.getEndpointUri();
        PollingConsumer answer = consumers.get(key);
        if (answer == null) {
            try {
                answer = endpoint.createPollingConsumer();
                answer.start();
            } catch (Exception e) {
                throw new FailedToCreateConsumerException(endpoint, e);
            }

            boolean singleton = true;
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