On Dec 29, 2011, at 5:42 PM, Willem Jiang wrote:
> There are some default interceptors, processor wrappers are used to help
> camel to implement the error handling and async processing.
What is async about the route below? I'd imagine that the route flow:
producer-template -> direct -> direct -> processor
... would be completely sync. Is there some async behavior hiding in here?
--jason
> On Fri Dec 30 03:56:15 2011, Jason Dillon wrote:
>> I'm seeing a very deep stack for a simple route and I'm wondering... why it
>> is so deep?
>>
>> Testing with a class like:
>>
>> <snip>
>> public class BasicCamelTrial
>> extends TestSupport
>> {
>> @Test
>> public void showStackDepthForSimpleRoute() throws Exception {
>> DefaultCamelContext camel = new DefaultCamelContext();
>> camel.disableJMX();
>> camel.addRoutes(new RouteBuilder()
>> {
>> @Override
>> public void configure() throws Exception {
>> from("direct:foo").to("direct:bar");
>> from("direct:bar").process(new Processor()
>> {
>> @Override
>> public void process(Exchange exchange) throws Exception {
>> Throwable t = new Throwable("MARKER");
>> log("HERE; stack size: {}",
>> t.getStackTrace().length, t);
>> }
>> });
>> }
>> });
>>
>> camel.start();
>>
>> ProducerTemplate producer = camel.createProducerTemplate();
>> producer.sendBody("direct:foo", "Hello");
>> producer.stop();
>>
>> camel.stop();
>> }
>> }
>> </snip>
>>
>> Shows stack is:
>>
>> <snip>
>> java.lang.Throwable: MARKER
>> at BasicCamelTrial$1$1.process(BasicCamelTrial.java:39)
>> [test-classes/:na]
>> at
>> org.apache.camel.impl.converter.AsyncProcessorTypeConverter$ProcessorToAsyncProcessorBridge.process(AsyncProcessorTypeConverter.java:50)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:90)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:318)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:209)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:306)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:111)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:61)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.SendProcessor$2.doInAsyncProducer(SendProcessor.java:114)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.impl.ProducerCache.doInAsyncProducer(ProducerCache.java:284)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.SendProcessor.process(SendProcessor.java:109)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:90)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:318)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:209)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:306)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:111)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:61)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.UnitOfWorkProcessor.processAsync(UnitOfWorkProcessor.java:139)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:106)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:104)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:85)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.processor.UnitOfWorkProducer.process(UnitOfWorkProducer.java:63)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:351)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:323)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:222)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.impl.ProducerCache.sendExchange(ProducerCache.java:323)
>> [camel-core-2.8.3.jar:2.8.3]
>> at org.apache.camel.impl.ProducerCache.send(ProducerCache.java:168)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.impl.DefaultProducerTemplate.send(DefaultProducerTemplate.java:110)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:123)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:130)
>> [camel-core-2.8.3.jar:2.8.3]
>> at
>> BasicCamelTrial.showStackDepthForSimpleRoute(BasicCamelTrial.java:48)
>> [test-classes/:na]
>> ... trimmed out test launcher ...
>> </snip>
>>
>> I ran with a few other routes (a simple a -> b) and a more complicated (a
>> -> b -> c) and it looks like each route adds 19 stack trace elements. Is
>> this the expected behavior of camel by default? Is there any way to
>> optimize the message flow for simple routes?
>>
>> --jason
>>
>>
>>
>
>
> --
> Willem
> ----------------------------------
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