Rik van Ballegooijen created CAMEL-16878:
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Summary: using breadcrumbs can cause ClassCastException in
MailBinding
Key: CAMEL-16878
URL: https://issues.apache.org/jira/browse/CAMEL-16878
Project: Camel
Issue Type: Bug
Components: camel-mail
Reporter: Rik van Ballegooijen
ClassCastException: class org.apache.camel.component.directvm.DirectVmEndpoint
cannot be cast to class org.apache.camel.component.mail.MailEndpoint
This is caused by:
{code:java}
MailConfiguration mailConfiguration = ((MailEndpoint)
exchange.getFromEndpoint()).getConfiguration();{code}
Which assumes the exchanges endpoint is always a MailEndpoint.
This piece of code from DefaultUnitOfWork will trigger the init of headers:
{code:java}
if (useBreadcrumb) {
// create or use existing breadcrumb
String breadcrumbId = exchange.getIn().getHeader(Exchange.BREADCRUMB_ID,
String.class);
if (breadcrumbId == null) {
// no existing breadcrumb, so create a new one based on the exchange id
breadcrumbId = exchange.getExchangeId();
exchange.getIn().setHeader(Exchange.BREADCRUMB_ID, breadcrumbId);
}
}
{code}
If message is of type MailMessage, it will be delegated there:
{code:java}
MailBinding binding = ExchangeHelper.getBinding(getExchange(),
MailBinding.class);
if (binding != null) {
map.putAll(binding.extractHeadersFromMail(mailMessage, getExchange()));
}
{code}
This works for the initial route with a from imaps, but in a subroute the error
occurs.
Possible solution could be to pass a reference to either the mail endpoint or
mail configuration to the binding on create/set.
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