The route is taking properties from a POJO and building up a message
to use to send an email. I add the from, to & subject headers in the
route which are just string values. The message body is created using
a Velocity template which extracts some values from the POJO.
I included some tracers in the route and here is the info that is
logged by Camel immediately before calling the SMTP endpoint (I've
anonymised some of the data):
2018-01-05 11:42:09,265 []
org.apache.camel.processor.interceptor.Tracer INFO -
ID-iusa16025-local-1515152339856-0-11 >>> (emailNotifications)
log[body] --> smtp://localhost <<< Pattern:InOnly,
Headers:{breadcrumbId=ID-iusa16025-local-1515152339856-0-11,
Content-Type=application/json, downloadSuccessful=false,
from=nore...@xxx.com, JMSCorrelationID=null,
JMSCorrelationIDAsBytes=null, JMSDeliveryMode=2,
JMSDestination=queue://emailQueue, JMSExpiration=0,
JMSMessageID=ID:iusa16025.local-64140-1515152341226-7:1:2:1:1,
JMSPriority=4, JMSRedelivered=false, JMSReplyTo=null,
JMSTimestamp=1515152529152, JMSType=null, JMSXGroupID=null,
JMSXUserID=null, subject=EDM Image Manager Alert, to=x...@yyy.com},
BodyType:String, Body:Hi,
Image https://i.xxx.com/zzz.png for template Sample Template failed to
upload to the CDN.
XXX Image Manager team.
The error message logged is this:
2018-01-05 11:42:09,312 []
org.apache.camel.processor.DefaultErrorHandler ERROR - Failed delivery
for (MessageId: ID-iusa16025-local-1515152339856-0-13 on ExchangeId:
ID-iusa16025-local-1515152339856-0-11). Exhausted after delivery
attempt: 1 caught: org.apache.camel.TypeConversionException: Error
during type conversion from type: java.lang.String to the required
type: java.lang.String with value queue://emailQueue due
com.fasterxml.jackson.databind.JsonMappingException: No serializer
found for class java.util.Vector$1 and no properties discovered to
create BeanSerializer (to avoid exception, disable
SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain:
org.apache.activemq.command.ActiveMQQueue["reference"]->javax.naming.Reference["all"])
Message History
---------------------------------------------------------------------------------------------------------------------------------------
RouteId ProcessorId Processor
Elapsed (ms)
[emailNotifications] [emailNotifications] [activemq://emailQueue
] [ 153]
[emailNotifications] [convertBodyTo4 ]
[convertBodyTo[com.yesmail.edmimagebridge.model.SingleImageModel]
] [ 2]
[emailNotifications] [setHeader1 ] [setHeader[subject]
] [ 0]
[emailNotifications] [setHeader2 ] [setHeader[to]
] [ 4]
[emailNotifications] [setHeader3 ] [setHeader[from]
] [ 0]
[emailNotifications] [to9 ] [velocity:errorEmailBody.vm
] [ 101]
[emailNotifications] [log10 ] [log
] [ 0]
[emailNotifications] [to10 ] [smtp://localhost
] [ 46]
Stacktrace
---------------------------------------------------------------------------------------------------------------------------------------
org.apache.camel.TypeConversionException: Error during type conversion
from type: java.lang.String to the required type: java.lang.String
with value queue://emailQueue due
com.fasterxml.jackson.databind.JsonMappingException: No serializer
found for class java.util.Vector$1 and no properties discovered to
create BeanSerializer (to avoid exception, disable
SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain:
org.apache.activemq.command.ActiveMQQueue["reference"]->javax.naming.Reference["all"])
The message suggests that I should disable
SerializationFeature.FAIL_ON_EMPTY_BEANS but I'm not sure how to
achieve that. I'm researching that just now and I was looking at
doing something like this:
JacksonDataFormat df = new JacksonDataFormat(java.util.Vector.class);
df.disableFeature(SerializationFeature.FAIL_ON_EMPTY_BEANS);
in beforeStart method of my CamelContextLifecycle class.
