Examples with WaitForTaskToComplete org.apache.camel.WaitForTaskToComplete used on opensource projects

Example 1 with WaitForTaskToComplete

use of org.apache.camel.WaitForTaskToComplete in project camel by apache.

the class RouteboxSedaProducer method process.

public boolean process(final Exchange exchange, final AsyncCallback callback) {
    // use a new copy of the exchange to route async and handover the on completion to the new copy
    // so its the new copy that performs the on completion callback when its done
    Exchange copy = ExchangeHelper.createCorrelatedCopy(exchange, true);
    // set a new from endpoint to be the seda queue
    copy.setFromEndpoint(endpoint);
    WaitForTaskToComplete wait = waitForTaskToComplete;
    if (exchange.getProperty(Exchange.ASYNC_WAIT) != null) {
        wait = exchange.getProperty(Exchange.ASYNC_WAIT, WaitForTaskToComplete.class);
    }
    if (wait == WaitForTaskToComplete.Always || (wait == WaitForTaskToComplete.IfReplyExpected && ExchangeHelper.isOutCapable(exchange))) {
        // latch that waits until we are complete
        final CountDownLatch latch = new CountDownLatch(1);
        // we should wait for the reply so install a on completion so we know when its complete
        copy.addOnCompletion(new SynchronizationAdapter() {

            @Override
            public void onDone(Exchange response) {
                // check for timeout, which then already would have invoked the latch
                if (latch.getCount() == 0) {
                    if (log.isTraceEnabled()) {
                        log.trace("{}. Timeout occurred so response will be ignored: {}", this, response.hasOut() ? response.getOut() : response.getIn());
                    }
                    return;
                } else {
                    if (log.isTraceEnabled()) {
                        log.trace("{} with response: {}", this, response.hasOut() ? response.getOut() : response.getIn());
                    }
                    try {
                        ExchangeHelper.copyResults(exchange, response);
                    } finally {
                        // always ensure latch is triggered
                        latch.countDown();
                    }
                }
            }

            @Override
            public boolean allowHandover() {
                return false;
            }

            @Override
            public String toString() {
                return "onDone at [" + endpoint.getEndpointUri() + "]";
            }
        });
        queue.add(copy);
        if (timeout > 0) {
            log.trace("Waiting for task to complete using timeout (ms): {} at [{}]", timeout, endpoint.getEndpointUri());
            // lets see if we can get the task done before the timeout
            boolean done = false;
            try {
                done = latch.await(timeout, TimeUnit.MILLISECONDS);
            } catch (InterruptedException e) {
            // ignore
            }
            if (!done) {
                exchange.setException(new ExchangeTimedOutException(exchange, timeout));
                // count down to indicate timeout
                latch.countDown();
            }
        } else {
            log.trace("Waiting for task to complete (blocking) at [{}]", endpoint.getEndpointUri());
            // no timeout then wait until its done
            try {
                latch.await();
            } catch (InterruptedException e) {
            // ignore
            }
        }
    } else {
        // no wait, eg its a InOnly then just add to queue and return
        queue.add(copy);
    }
    // we use OnCompletion on the Exchange to callback and wait for the Exchange to be done
    // so we should just signal the callback we are done synchronously
    callback.done(true);
    return true;
}

Example 2 with WaitForTaskToComplete

use of org.apache.camel.WaitForTaskToComplete in project camel by apache.

the class DisruptorProducer method process.

@Override
public boolean process(final Exchange exchange, final AsyncCallback callback) {
    WaitForTaskToComplete wait = waitForTaskToComplete;
    if (exchange.getProperty(Exchange.ASYNC_WAIT) != null) {
        wait = exchange.getProperty(Exchange.ASYNC_WAIT, WaitForTaskToComplete.class);
    }
    if (wait == WaitForTaskToComplete.Always || (wait == WaitForTaskToComplete.IfReplyExpected && ExchangeHelper.isOutCapable(exchange))) {
        // do not handover the completion as we wait for the copy to complete, and copy its result back when it done
        final Exchange copy = prepareCopy(exchange, false);
        // latch that waits until we are complete
        final CountDownLatch latch = new CountDownLatch(1);
        // we should wait for the reply so install a on completion so we know when its complete
        copy.addOnCompletion(new SynchronizationAdapter() {

            @Override
            public void onDone(final Exchange response) {
                // check for timeout, which then already would have invoked the latch
                if (latch.getCount() == 0) {
                    if (log.isTraceEnabled()) {
                        log.trace("{}. Timeout occurred so response will be ignored: {}", this, response.hasOut() ? response.getOut() : response.getIn());
                    }
                } else {
                    if (log.isTraceEnabled()) {
                        log.trace("{} with response: {}", this, response.hasOut() ? response.getOut() : response.getIn());
                    }
                    try {
                        ExchangeHelper.copyResults(exchange, response);
                    } finally {
                        // always ensure latch is triggered
                        latch.countDown();
                    }
                }
            }

            @Override
            public boolean allowHandover() {
                // at this point in the routing (at this leg), instead of at the very last (this ensure timeout is honored)
                return false;
            }

            @Override
            public String toString() {
                return "onDone at endpoint: " + endpoint;
            }
        });
        doPublish(copy);
        if (timeout > 0) {
            if (log.isTraceEnabled()) {
                log.trace("Waiting for task to complete using timeout (ms): {} at [{}]", timeout, endpoint.getEndpointUri());
            }
            // lets see if we can get the task done before the timeout
            boolean done = false;
            try {
                done = latch.await(timeout, TimeUnit.MILLISECONDS);
            } catch (InterruptedException e) {
            // ignore
            }
            if (!done) {
                // Remove timed out Exchange from disruptor endpoint.
                // We can't actually remove a published exchange from an active Disruptor.
                // Instead we prevent processing of the exchange by setting a Property on the exchange and the value
                // would be an AtomicBoolean. This is set by the Producer and the Consumer would look up that Property and
                // check the AtomicBoolean. If the AtomicBoolean says that we are good to proceed, it will process the
                // exchange. If false, it will simply disregard the exchange.
                // But since the Property map is a Concurrent one, maybe we don't need the AtomicBoolean. Check with Simon.
                // Also check the TimeoutHandler of the new Disruptor 3.0.0, consider making the switch to the latest version.
                exchange.setProperty(DisruptorEndpoint.DISRUPTOR_IGNORE_EXCHANGE, true);
                exchange.setException(new ExchangeTimedOutException(exchange, timeout));
                // count down to indicate timeout
                latch.countDown();
            }
        } else {
            if (log.isTraceEnabled()) {
                log.trace("Waiting for task to complete (blocking) at [{}]", endpoint.getEndpointUri());
            }
            // no timeout then wait until its done
            try {
                latch.await();
            } catch (InterruptedException e) {
            // ignore
            }
        }
    } else {
        // no wait, eg its a InOnly then just publish to the ringbuffer and return
        // handover the completion so its the copy which performs that, as we do not wait
        final Exchange copy = prepareCopy(exchange, true);
        doPublish(copy);
    }
    // we use OnCompletion on the Exchange to callback and wait for the Exchange to be done
    // so we should just signal the callback we are done synchronously
    callback.done(true);
    return true;
}

Example 3 with WaitForTaskToComplete

use of org.apache.camel.WaitForTaskToComplete in project camel by apache.

the class SedaProducer method process.

@Override
public boolean process(final Exchange exchange, final AsyncCallback callback) {
    WaitForTaskToComplete wait = waitForTaskToComplete;
    if (exchange.getProperty(Exchange.ASYNC_WAIT) != null) {
        wait = exchange.getProperty(Exchange.ASYNC_WAIT, WaitForTaskToComplete.class);
    }
    if (wait == WaitForTaskToComplete.Always || (wait == WaitForTaskToComplete.IfReplyExpected && ExchangeHelper.isOutCapable(exchange))) {
        // do not handover the completion as we wait for the copy to complete, and copy its result back when it done
        Exchange copy = prepareCopy(exchange, false);
        // latch that waits until we are complete
        final CountDownLatch latch = new CountDownLatch(1);
        // we should wait for the reply so install a on completion so we know when its complete
        copy.addOnCompletion(new SynchronizationAdapter() {

            @Override
            public void onDone(Exchange response) {
                // check for timeout, which then already would have invoked the latch
                if (latch.getCount() == 0) {
                    if (log.isTraceEnabled()) {
                        log.trace("{}. Timeout occurred so response will be ignored: {}", this, response.hasOut() ? response.getOut() : response.getIn());
                    }
                    return;
                } else {
                    if (log.isTraceEnabled()) {
                        log.trace("{} with response: {}", this, response.hasOut() ? response.getOut() : response.getIn());
                    }
                    try {
                        ExchangeHelper.copyResults(exchange, response);
                    } finally {
                        // always ensure latch is triggered
                        latch.countDown();
                    }
                }
            }

            @Override
            public boolean allowHandover() {
                // at this point in the routing (at this leg), instead of at the very last (this ensure timeout is honored)
                return false;
            }

            @Override
            public String toString() {
                return "onDone at endpoint: " + endpoint;
            }
        });
        log.trace("Adding Exchange to queue: {}", copy);
        try {
            // do not copy as we already did the copy
            addToQueue(copy, false);
        } catch (SedaConsumerNotAvailableException e) {
            exchange.setException(e);
            callback.done(true);
            return true;
        }
        if (timeout > 0) {
            if (log.isTraceEnabled()) {
                log.trace("Waiting for task to complete using timeout (ms): {} at [{}]", timeout, endpoint.getEndpointUri());
            }
            // lets see if we can get the task done before the timeout
            boolean done = false;
            try {
                done = latch.await(timeout, TimeUnit.MILLISECONDS);
            } catch (InterruptedException e) {
            // ignore
            }
            if (!done) {
                exchange.setException(new ExchangeTimedOutException(exchange, timeout));
                // remove timed out Exchange from queue
                endpoint.getQueue().remove(copy);
                // count down to indicate timeout
                latch.countDown();
            }
        } else {
            if (log.isTraceEnabled()) {
                log.trace("Waiting for task to complete (blocking) at [{}]", endpoint.getEndpointUri());
            }
            // no timeout then wait until its done
            try {
                latch.await();
            } catch (InterruptedException e) {
            // ignore
            }
        }
    } else {
        // no wait, eg its a InOnly then just add to queue and return
        try {
            addToQueue(exchange, true);
        } catch (SedaConsumerNotAvailableException e) {
            exchange.setException(e);
            callback.done(true);
            return true;
        }
    }
    // we use OnCompletion on the Exchange to callback and wait for the Exchange to be done
    // so we should just signal the callback we are done synchronously
    callback.done(true);
    return true;
}