ppalaga commented on a change in pull request #2052:
URL: https://github.com/apache/camel-quarkus/pull/2052#discussion_r534833201
##########
File path: docs/modules/ROOT/pages/reference/extensions/google-pubsub.adoc
##########
@@ -32,3 +32,12 @@ Please refer to the above link for usage and configuration
details.
----
Check the xref:user-guide/index.adoc[User guide] for more information about
writing Camel Quarkus applications.
+
+== Camel Quarkus limitations
+
+By default, the Camel PubSub component uses JDK object serialization via
`ObjectOutputStream` whenever the message body is anything other than `String`
or `byte[]`.
+
+Since such serialization is not yet supported by GraalVM, this extension
provides a custom Jackson based serializer to serialize complex message
payloads as JSON.
+
+If your payload contains binary data, then you will need to handle that by
creating a custom Jackson Serializer / Deserializer.
Review comment:
I guess the readers could find this link to Quarkus Jackson guide
helpful https://quarkus.io/guides/writing-extensions#customizing-jackson where
they explain how to write serializers.
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