public boolean process(Exchange exchange, AsyncCallback callback) {
// remember the callback to be used by the interceptor
this.callback.set(callback);
try {
// invoke the target
boolean done = target.process(exchange, callback);
if (interceptorDone.get() != null) {
// return the result from the interceptor if it was invoked
return interceptorDone.get();
} else {
// otherwise from the target
return done;
}
} finally {
// cleanup
this.callback.remove();
this.interceptorDone.remove();
}
}
private boolean doProcessSequential(
final Exchange original,
final AtomicExchange result,
final Iterable<ProcessorExchangePair> pairs,
final Iterator<ProcessorExchangePair> it,
final ProcessorExchangePair pair,
final AsyncCallback callback,
final AtomicInteger total) {
boolean sync = true;
final Exchange exchange = pair.getExchange();
Processor processor = pair.getProcessor();
final Producer producer = pair.getProducer();
TracedRouteNodes traced =
exchange.getUnitOfWork() != null ? exchange.getUnitOfWork().getTracedRouteNodes() : null;
// compute time taken if sending to another endpoint
final StopWatch watch = producer != null ? new StopWatch() : null;
try {
// prepare tracing starting from a new block
if (traced != null) {
traced.pushBlock();
}
if (producer != null) {
EventHelper.notifyExchangeSending(exchange.getContext(), exchange, producer.getEndpoint());
}
// let the prepared process it, remember to begin the exchange pair
AsyncProcessor async = AsyncProcessorConverterHelper.convert(processor);
pair.begin();
sync =
async.process(
exchange,
new AsyncCallback() {
public void done(boolean doneSync) {
// we are done with the exchange pair
pair.done();
// okay we are done, so notify the exchange was sent
if (producer != null) {
long timeTaken = watch.stop();
Endpoint endpoint = producer.getEndpoint();
// emit event that the exchange was sent to the endpoint
EventHelper.notifyExchangeSent(
exchange.getContext(), exchange, endpoint, timeTaken);
}
// we only have to handle async completion of the routing slip
if (doneSync) {
return;
}
// continue processing the multicast asynchronously
Exchange subExchange = exchange;
// Decide whether to continue with the multicast or not; similar logic to the
// Pipeline
// remember to test for stop on exception and aggregate before copying back
// results
boolean continueProcessing =
PipelineHelper.continueProcessing(
subExchange,
"Sequential processing failed for number " + total.get(),
LOG);
if (stopOnException && !continueProcessing) {
if (subExchange.getException() != null) {
// wrap in exception to explain where it failed
subExchange.setException(
new CamelExchangeException(
"Sequential processing failed for number " + total,
subExchange,
subExchange.getException()));
} else {
// we want to stop on exception, and the exception was handled by the error
// handler
// this is similar to what the pipeline does, so we should do the same to not
// surprise end users
// so we should set the failed exchange as the result and be done
result.set(subExchange);
}
// and do the done work
doDone(original, subExchange, pairs, callback, false, true);
return;
}
try {
doAggregate(getAggregationStrategy(subExchange), result, subExchange);
} catch (Throwable e) {
// wrap in exception to explain where it failed
subExchange.setException(
new CamelExchangeException(
"Sequential processing failed for number " + total, subExchange, e));
// and do the done work
doDone(original, subExchange, pairs, callback, false, true);
return;
}
total.incrementAndGet();
// maybe there are more processors to multicast
while (it.hasNext()) {
// prepare and run the next
ProcessorExchangePair pair = it.next();
subExchange = pair.getExchange();
updateNewExchange(subExchange, total.get(), pairs, it);
boolean sync =
doProcessSequential(original, result, pairs, it, pair, callback, total);
if (!sync) {
LOG.trace(
"Processing exchangeId: {} is continued being processed asynchronously",
original.getExchangeId());
return;
}
// Decide whether to continue with the multicast or not; similar logic to the
// Pipeline
// remember to test for stop on exception and aggregate before copying back
// results
continueProcessing =
PipelineHelper.continueProcessing(
subExchange,
"Sequential processing failed for number " + total.get(),
LOG);
if (stopOnException && !continueProcessing) {
if (subExchange.getException() != null) {
// wrap in exception to explain where it failed
subExchange.setException(
new CamelExchangeException(
"Sequential processing failed for number " + total,
subExchange,
subExchange.getException()));
} else {
// we want to stop on exception, and the exception was handled by the error
// handler
// this is similar to what the pipeline does, so we should do the same to
// not surprise end users
// so we should set the failed exchange as the result and be done
result.set(subExchange);
}
// and do the done work
doDone(original, subExchange, pairs, callback, false, true);
return;
}
// must catch any exceptions from aggregation
try {
doAggregate(getAggregationStrategy(subExchange), result, subExchange);
} catch (Throwable e) {
// wrap in exception to explain where it failed
subExchange.setException(
new CamelExchangeException(
"Sequential processing failed for number " + total, subExchange, e));
// and do the done work
doDone(original, subExchange, pairs, callback, false, true);
return;
}
total.incrementAndGet();
}
// do the done work
subExchange = result.get() != null ? result.get() : null;
doDone(original, subExchange, pairs, callback, false, true);
}
});
} finally {
// pop the block so by next round we have the same staring point and thus the tracing looks
// accurate
if (traced != null) {
traced.popBlock();
}
}
return sync;
}
@Override
public void onAfterRoute(Route route, Exchange exchange) {
// we use the onAfterRoute callback, to ensure the data has been marshalled before
// the consumer writes the response back
// only trigger when it was the 1st route that was done
if (!routeId.equals(route.getId())) {
return;
}
// only marshal if there was no exception
if (exchange.getException() != null) {
return;
}
if (skipBindingOnErrorCode) {
Integer code =
exchange.hasOut()
? exchange.getOut().getHeader(Exchange.HTTP_RESPONSE_CODE, Integer.class)
: exchange.getIn().getHeader(Exchange.HTTP_RESPONSE_CODE, Integer.class);
// if there is a custom http error code then skip binding
if (code != null && code >= 300) {
return;
}
}
boolean isXml = false;
boolean isJson = false;
// accept takes precedence
if (accept != null) {
isXml = accept.toLowerCase(Locale.ENGLISH).contains("xml");
isJson = accept.toLowerCase(Locale.ENGLISH).contains("json");
}
// fallback to content type if still undecided
if (!isXml && !isJson) {
String contentType = ExchangeHelper.getContentType(exchange);
if (contentType != null) {
isXml = contentType.toLowerCase(Locale.ENGLISH).contains("xml");
isJson = contentType.toLowerCase(Locale.ENGLISH).contains("json");
}
}
// if content type could not tell us if it was json or xml, then fallback to if the binding
// was configured with
// that information in the consumes
if (!isXml && !isJson) {
isXml = produces != null && produces.toLowerCase(Locale.ENGLISH).contains("xml");
isJson = produces != null && produces.toLowerCase(Locale.ENGLISH).contains("json");
}
// only allow xml/json if the binding mode allows that (when off we still want to know if its
// xml or json)
if (bindingMode != null) {
isXml &=
bindingMode.equals("off") || bindingMode.equals("auto") || bindingMode.contains("xml");
isJson &=
bindingMode.equals("off") || bindingMode.equals("auto") || bindingMode.contains("json");
// if we do not yet know if its xml or json, then use the binding mode to know the mode
if (!isJson && !isXml) {
isXml = bindingMode.equals("auto") || bindingMode.contains("xml");
isJson = bindingMode.equals("auto") || bindingMode.contains("json");
}
}
// in case we have not yet been able to determine if xml or json, then use the same as in the
// unmarshaller
if (isXml && isJson) {
isXml = wasXml;
isJson = !wasXml;
}
// need to prepare exchange first
ExchangeHelper.prepareOutToIn(exchange);
// ensure there is a content type header (even if binding is off)
ensureHeaderContentType(produces, isXml, isJson, exchange);
if (bindingMode == null || "off".equals(bindingMode)) {
// binding is off, so no message body binding
return;
}
// is there any marshaller at all
if (jsonMarshal == null && xmlMarshal == null) {
return;
}
// is the body empty
if ((exchange.hasOut() && exchange.getOut().getBody() == null)
|| (!exchange.hasOut() && exchange.getIn().getBody() == null)) {
return;
}
try {
// favor json over xml
if (isJson && jsonMarshal != null) {
jsonMarshal.process(exchange);
} else if (isXml && xmlMarshal != null) {
xmlMarshal.process(exchange);
} else {
// we could not bind
if (bindingMode.equals("auto")) {
// okay for auto we do not mind if we could not bind
} else {
if (bindingMode.contains("xml")) {
exchange.setException(
new BindingException(
"Cannot bind to xml as message body is not xml compatible", exchange));
} else {
exchange.setException(
new BindingException(
"Cannot bind to json as message body is not json compatible", exchange));
}
}
}
} catch (Throwable e) {
exchange.setException(e);
}
}
@Override
public boolean process(Exchange exchange, final AsyncCallback callback) {
if (enableCORS) {
exchange.addOnCompletion(new RestBindingCORSOnCompletion(corsHeaders));
}
boolean isXml = false;
boolean isJson = false;
String contentType = ExchangeHelper.getContentType(exchange);
if (contentType != null) {
isXml = contentType.toLowerCase(Locale.ENGLISH).contains("xml");
isJson = contentType.toLowerCase(Locale.ENGLISH).contains("json");
}
// if content type could not tell us if it was json or xml, then fallback to if the binding was
// configured with
// that information in the consumes
if (!isXml && !isJson) {
isXml = consumes != null && consumes.toLowerCase(Locale.ENGLISH).contains("xml");
isJson = consumes != null && consumes.toLowerCase(Locale.ENGLISH).contains("json");
}
// only allow xml/json if the binding mode allows that
isXml &= bindingMode.equals("auto") || bindingMode.contains("xml");
isJson &= bindingMode.equals("auto") || bindingMode.contains("json");
// if we do not yet know if its xml or json, then use the binding mode to know the mode
if (!isJson && !isXml) {
isXml = bindingMode.equals("auto") || bindingMode.contains("xml");
isJson = bindingMode.equals("auto") || bindingMode.contains("json");
}
String accept = exchange.getIn().getHeader("Accept", String.class);
String body = null;
if (exchange.getIn().getBody() != null) {
// okay we have a binding mode, so need to check for empty body as that can cause the
// marshaller to fail
// as they assume a non-empty body
if (isXml || isJson) {
// we have binding enabled, so we need to know if there body is empty or not\
// so force reading the body as a String which we can work with
body = MessageHelper.extractBodyAsString(exchange.getIn());
if (body != null) {
exchange.getIn().setBody(body);
if (isXml && isJson) {
// we have still not determined between xml or json, so check the body if its xml based
// or not
isXml = body.startsWith("<");
isJson = !isXml;
}
}
}
}
// favor json over xml
if (isJson && jsonUnmarshal != null) {
// add reverse operation
exchange.addOnCompletion(
new RestBindingMarshalOnCompletion(
exchange.getFromRouteId(), jsonMarshal, xmlMarshal, false, accept));
if (ObjectHelper.isNotEmpty(body)) {
return jsonUnmarshal.process(exchange, callback);
} else {
callback.done(true);
return true;
}
} else if (isXml && xmlUnmarshal != null) {
// add reverse operation
exchange.addOnCompletion(
new RestBindingMarshalOnCompletion(
exchange.getFromRouteId(), jsonMarshal, xmlMarshal, true, accept));
if (ObjectHelper.isNotEmpty(body)) {
return xmlUnmarshal.process(exchange, callback);
} else {
callback.done(true);
return true;
}
}
// we could not bind
if (bindingMode == null || "off".equals(bindingMode) || bindingMode.equals("auto")) {
// okay for auto we do not mind if we could not bind
exchange.addOnCompletion(
new RestBindingMarshalOnCompletion(
exchange.getFromRouteId(), jsonMarshal, xmlMarshal, false, accept));
callback.done(true);
return true;
} else {
if (bindingMode.contains("xml")) {
exchange.setException(
new BindingException(
"Cannot bind to xml as message body is not xml compatible", exchange));
} else {
exchange.setException(
new BindingException(
"Cannot bind to json as message body is not json compatible", exchange));
}
callback.done(true);
return true;
}
}
/**
* Process invoked by the interceptor
*
* @param exchange the message exchange
* @throws Exception
*/
public void process(Exchange exchange) throws Exception {
// invoke when interceptor wants to invoke
boolean done = interceptor.process(exchange, callback.get());
interceptorDone.set(done);
}