Marquis Wang created CAMEL-13761:
------------------------------------
Summary: StartupListener runs before routes are started, contrary
to Javadoc
Key: CAMEL-13761
URL: https://issues.apache.org/jira/browse/CAMEL-13761
Project: Camel
Issue Type: Bug
Components: came-core
Affects Versions: 2.23.3
Reporter: Marquis Wang
The Javadoc
([https://static.javadoc.io/org.apache.camel/camel-core/2.23.3/org/apache/camel/StartupListener.html])
for StartupListener is misleading (italics for emphasis):
{quote}This can be used to perform any custom work when the entire
[{{CamelContext}}|https://static.javadoc.io/org.apache.camel/camel-core/2.23.3/org/apache/camel/CamelContext.html]
has been initialized and *almost* started. _For example this ensures that all
Camel routes have been started and are up and running, before this callback is
invoked._
{quote}
However, routes are not started within the callback. The following code, for
example,
{code:java}
DefaultCamelContext context = new DefaultCamelContext();
context.addStartupListener((c, alreadyStarted) -> {
c.createProducerTemplate().sendBody("direct:doesNotExistYet", new Object());
});
context.addRoutes(new RouteBuilder() {
@Override
public void configure() {
from("direct:doesNotExistYet").bean((Consumer<Object>)
System.out::println);
}
});
context.start();{code}
fails with
{code}
Caused by:
org.apache.camel.component.direct.DirectConsumerNotAvailableException: No
consumers available on endpoint: direct://doesNotExistYet.
Exchange[ID-mwang2-pml-1563396556957-0-1]
at
org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:69)
at
org.apache.camel.processor.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:186)
at
org.apache.camel.processor.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:86)
at
org.apache.camel.impl.ProducerCache$1.doInProducer(ProducerCache.java:541)
at
org.apache.camel.impl.ProducerCache$1.doInProducer(ProducerCache.java:506)
at
org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:369)
at
org.apache.camel.impl.ProducerCache.sendExchange(ProducerCache.java:506)
at org.apache.camel.impl.ProducerCache.send(ProducerCache.java:229)
at
org.apache.camel.impl.DefaultProducerTemplate.send(DefaultProducerTemplate.java:144)
at
org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:161)
... 12 more
{code}
I am aware that using ExtendedStartupListener or an EventNotifier makes this
work, but it would be great if the Javadoc was updated (assuming this is
intended behavior, I am not sure).
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