If I used Autobean on GWT client to serialise my POJO (sent out thro RequestBuilder) but I plan to use say, groovy, perl or php to service that request, I would need to know the serialization format of Autobean.
What is and where can I get the JSON format spec for Autobean?
They're documented here.
Related
I have a following use case :
parse the json from stream (kafka topic)
extract some fields (likely 35 out of 100 fields)
Build a json out of those fields
Publish it to pub/sub for further processing
My implementation is very much java language bound. Can anyone suggest optimal solution for this ? and why is it optimal ?
For json parsing, I am thinking of https://bolerio.github.io/mjson/
Kafka includes Jackson JSON library and includes its own JSON Deserializer that returns a JsonNode class
Alternatively,as listed in the comments, you can use higher level frameworks such as Spring, Vertx, Quarkus, etc to build Kafka consumers
For the listed use case, I would opt for Spark, Flink, or NiFi for integration with PubSub. Each also offering JSON proessing, with NiFi being more advanced in that it can do JSONPath
I'm struggling with Java8 streams.
Need to read list of JSON objects from external REST service and unmarshall it to POJOs
What is the best approach for it?
Use JAX-RS client like Jersey or RESTEasy for that and don't bother using Java8 streams unless you there is a very specific reason for doing that (if you have one - please post it here).
Hi I am new to Java and not sure how to proceed (kindly ignore any typos or my language). Can somebody help me out (just the Idea/how to proceed, dont need any sample code). I am trying to create a Restful Json webservice (using Spring MVC).
The webservice that I am trying to create is kind of a wrapper for an existing XML based restful webservice.
The Idea is to have one common platform, since all other existing services are exposed as as JSON services.
My job is to fetch the XML transform it into a Json, but the tricky part is The Json schema is a superset of the XML schema (I mean it contains more elements that get filled with some default values).
Please let me know if you need more info.
Thanks in advance.
One way to do it would be to use Jaxb to transform the the incoming XML to Java Objects. Build your Jaxb objects in a way that it contains all the elements, the one with default values and the elements in the incoming XML.
Ones the XMl is converted into Jaxb you can use org.springframework.http.converter.json.MappingJacksonHttpMessageConverter message converter to convert your Jaxb object to Json string.
By default, Swagger parses a class's data members in order to document the objects used as parameters or returned by a given web service. If you're using Jackson, the Jackson annotations provide a much more accurate description of the API.
Does anyone know an (easy) way to get Swagger to parse Jackson annotations. Perhaps an overridden parser?
Not sure if this would help, but Jackson 2.1 and later expose POJO structure as seen by Jackson itself (ObjectMapper.acceptJsonFormatVisitor), which could be used for generating different kinds of artifacts. I have written an Avro schema generator with it, for example (as part of Jackson Avro module)
As of version 1.2, Swagger can parse Jackson annotations on its own. I confirmed this using Jackson 2.1.
I am using Spring 3.0 and ExtJS. I have been trying to send a Map object from my controller to jsp. When I putting a pojo in HashMap and sending that HashMap to view.
From controller it is returning a Map but in ExtJS it is not able to read the response and gives below error.
HTTP Error code: 406
message
description The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ().
Can anyone tell that how this can be resolved?
I dont think you can just shove any POJO into a map and return it via an HttpResponse. That's not how JSON works.
In order to send JSON from Java, you have to do the equivalent of serializing it using a JSON API (or roll your own). FlexJSON is one I use, as it ships in Spring Roo and is pretty easy.