jackson 2.0 joda datetime serialization/deserialization (0.6.0-SNAPSHOT)

[David Morgantini]

Hey,

I'm testing the 0.6.0-SNAPSHOT and I'm running into issues with joda time serialization.  In 0.5.1, datetimes serialized as milliseconds (and worked just fine), now they serialize as fully fledged objects with every little detail of the time involved.  This now leads to issues with deserialization:

Caused by: ! com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of org.joda.time.Chronology, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information

 at [Source: java.util.zip.GZIPInputStream@2947640e; line: 1, column: 376] (through reference chain: uk.gov.ida.hub.shared.dto.IdentityProviderMetadataDto["expires"]->org.joda.time.DateTime["chronology"]).

Any ideas?

Thanks,

David

0.6.0-SNAPSHOT serialization:

expires: 

{

• year: 2012,
• era: 1,
• dayOfYear: 325,
• dayOfWeek: 2,
• dayOfMonth: 20,
• weekOfWeekyear: 47,
• weekyear: 2012,
• monthOfYear: 11,
• yearOfEra: 2012,
• yearOfCentury: 12,
• centuryOfEra: 20,
• millisOfSecond: 275,
• millisOfDay: 35220275,
• secondOfMinute: 0,
• secondOfDay: 35220,
• minuteOfHour: 47,
• minuteOfDay: 587,
• hourOfDay: 9,
• zone: 

  {

  • fixed: true,
  • id: "UTC"

  },
• millis: 1353404820275,
• chronology: 

  {

  • zone: 

    {

    • fixed: true,
    • id: "UTC"

    }

  },
• beforeNow: false,
• afterNow: true,
• equalNow: false

},

0.5.1 serialization:

expires: 1353406674345,

[David Morgantini]

I've solved this problem using this gist https://gist.github.com/4117302 but I'm pretty sure that this isn't the right way to handle this - or that dropwizard should perhaps handle this out of the box.

[Derek Stainer]

Hi David-

You are on the right track... Except you don't have to build any of the JodaDateTime serialization. The Joda module can be found here: 

https://github.com/FasterXML/jackson-datatype-joda

Once you have it as a dependency you can register the module as well as the format that you want like so:

In the initialize method (in 0.6.0-SNAPSHOT)

bootstrap.getObjectMapperFactory().registerModule(new JodaModule());
bootstrap.getObjectMapperFactory().setDateFormat(new ISO8601DateFormat());

We use the ISO8601DateFormat object for the DateFormat but you can provide your own if you want by extending the DateFormat class itself.

Hopefully this helps.

Derek

[David Morgantini]

Cool thanks.

[Coda Hale]

You know, enough services at Yammer use Joda Time that it's worth adding first-class support for it.

0.6.0-SNAPSHOT now includes Joda Time 2.1, with Jackson support, Hibernate support, and DateTimeParam.

---
Coda Hale
http://codahale.com

[Diego Magalhães]

Great to hear Coda, does 0.6.0 includes latest slf4j too?

Diego Magalhães
http://diegomagalhaes.com
claro @ +55 21 9411 2823

[Coda Hale]

Yes.

---
Coda Hale
http://codahale.com