Hi Ron, for Jackson you need to add support for Java 8+ features explicitly.
Have a look at how to do it here: https://github.com/FasterXML/jackson-modules-java8 Jackson JSON data format has a `objectMapper`[2] property that you can use to set the customized ObjectMapper. zoran [2] https://camel.apache.org/components/latest/json-jackson-dataformat.html On Mon, Dec 2, 2019 at 6:21 AM Ron Cecchini <roncecch...@comcast.net> wrote: > > 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 -- Zoran Regvart
