TL;DR: unmarshalling JSON to POJO with Jackson is no longer working on a
java.time.OffsetDateTime since migrating to Camel 3.0. java.util.Date still
works fine though.
Ok, after 2 days of googling and trying all manner of sorcery (except for
sacrificing a chicken... maybe I should?), I'm waving the white flag on this
one...
Basically, I had worked through all the migration stuff. I also updated Spring
Boot to 2.2.1.RELEASE, and updated all the *-starter dependencies, etc.
Everything was working great.
Eventually I uncommented some code I hadn't been using for a while - and that's
when the "fun" began...
The input to the route in question is a JSON array upon which I do a
.split().jsonpathWriteAsString("$") and eventually an .unmarshal(pojoJson)
where 'pojoJson' is:
JacksonDataFormat pojoJson = new JacksonDataFormat(MyPojo.class);
Things were working fantastic before the migration, but now I get:
com.fasterxml.jackson.databind.exc.InvalidDefinitionException:
Cannot construct instance of `java.time.OffsetDateTime` (no Creators, like
default construct, exist):
no String-argument constructor/factory method to deserialize from String
value ('2019-11-14T04:41:33.302711Z')
Googling revealed all kinds of stuff related to Jackson and Java 8 date/times
posted over the last few years.
I tried a few of the suggestions, including adding several Jackson-specific
dependencies (to go along with
'org.apache.camel.springboot:camel-jackson-starter') - and adding the
dependencies in different orders (someone said that could be a factor) - and
nothing worked.
Based on a few suggestions, I even created the following @PostConstruct method
in my @SpringBootApplication class, and again got the same "no Creators" error:
@PostConstruct
public void setUp ()
{
context.getGlobalOptions().put("CamelJacksonEnableTypeConverter",
"true");
context.getGlobalOptions().put("CamelJacksonTypeConverterToPojo",
"true");
objectMapper.registerModule(new JavaTimeModule());
objectMapper.registerModule(new JSR310Module());
objectMapper.registerModule(new Jdk8Module());
objectMapper.findAndRegisterModules();
}
I even tried switching jsonpathWriteAsString("$") to jsonpath("$"), setting
pojoJson.useMap(), and passing the Map from jsonpath() to unmarshal, and this
time got:
Caused by: org.apache.camel.NoTypeConversionAvailableException:
No type converter available to convert from type: java.util.LinkedHashMap
to the required type:
java.io.InputStream with value [...]
I finally hit on a temporary workaround - going back to using a java.util.Date
instead of a java.time.OffsetDateTime - and it again all works great with Camel
3.0. But eventually I'll probably need to figure out how to use the newer Java
date/times.
Thanks for reading this far and helping me figure out where I went wrong...
> On November 28, 2019 at 2:09 PM Ron Cecchini <roncecch...@comcast.net> wrote:
>
>
> Christmas has come early!
>
> There's so much new stuff I'm not even sure what I should be excited about at
> the moment - but I'm excited!
>
> Thank you for all your efforts, guys!
>
> (and now I can spend pre-Thanksgiving feasting working through the Migration
> and eliminating the run-time crashes...)
>
> > On November 28, 2019 at 9:12 AM Gregor Zurowski <gre...@list.zurowski.org>
> > wrote:
> >
> >
> > It's finally here - after four release candidates and three milestone
> > releases, the Camel community announces the immediate availability of
> > Camel 3.0.0, a new major release with over 1000 new features,
> > improvements and fixes.
> >
> > Please read our migration guide [1] that describes how to upgrade
> > Camel 2.x applications to Camel 3.0.
> >
> > The artifacts are published and ready for you to download [2] either
> > from the Apache mirrors or from the Central Maven repository. For more
> > details please take a look at the release notes [3, 4].
> >
> > Many thanks to all who made this release possible.
> >
> > On behalf of the Camel PMC,
> > Gregor Zurowski
> >
> > [1] https://camel.apache.org/manual/latest/camel-3-migration-guide.html
> > [1] http://camel.apache.org/download.html
> > [2] https://camel.apache.org/blog/release-3-0-0.html
> > [3]
> > https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12315691&projectId=12311211
