I am developing a Web application using Vuejs/Nuxtjs which makes call to my Java Service using the Axios but during the call I get the error:

POST http://localhost:9001/generate 500 (Internal Server Error)

I am getting this error because my Java service type accepts the input parameter of Custom data type InputParameter. If I change to String then it works fine. So I would like to know what changes should I make to front-end call or to my Java Service so it can work with InputParameter type.

Following is the Vuejs call that I am making to Java service:

const headers = { 'Content-Type': 'application/json' }

this.$axios.post('/generate', { ...JSON.parse(inputParameter) }, { headers })
.then((response) => {
    console.log(JSON.stringify(response.data))
})
.catch((error) => {
    console.log(error)
})

Following is my Java service method which is NOT working with custom data type InputParameter, the call does not detect the method and execution does not go within the method:

@Path("/generate")
@Produces(MediaType.APPLICATION_JSON)
@APIResponses(value = {
        @APIResponse(responseCode = "200", description = "returns list of JSON Objects"),
        @APIResponse(responseCode = "500", description = "An internal Server Error occurred")
})
public String generate(final InputParameter inputParameter){
    System.out.println(inputTemplate.toString());
    return null;
}

If I change the above JAVA Service method input parameter data type to String then the method is detected and input is printed:

@Path("/generate")
@Produces(MediaType.APPLICATION_JSON)
@APIResponses(value = {
        @APIResponse(responseCode = "200", description = "returns list of JSON Objects"),
        @APIResponse(responseCode = "500", description = "An internal Server Error occurred")
})
public String generate(final String inputParameter){
    System.out.println(inputTemplate);
    return null;
}

I am not understanding whats wrong here. Can someone please help?

Things I have tried:

1. Adding @Consumes(MediaType.APPLICATION_JSON).
2. Changing the method to public String generate(@RequestBody final InputParameter inputParameter)

My InputParameter class looks something like this:

@Data
@AllArgsConstructor
@NoArgsConstructor
public class InputParameter {
    private List<String> names;
    private List<String> jobs;
}

My InputParameter which I am passing to Java Service looks something like this:

{
  "names":[
    "Batman",
    "Superman",
    "Ironman"
  ],
  "jobs":[
    "Fighting",
    "Fyling",
    "Teching"
  ]
}

CodePudding user response：

Dear in the back end the api is accepting an object of type InputParameter. For solving the problem you have to create a class the same as InputParameter class and generate an object of that and send that object to the back end.

Let me know if you need more help!

CodePudding user response：

Posting the answer can be helpful to someone else in the future. I tried some things but nothing worked and finally following worked for me:

@POST
@Path("/generate")
@Produces(MediaType.APPLICATION_JSON)
@APIResponses(value = {
        @APIResponse(responseCode = "200", description = "returns list of JSON Objects"),
        @APIResponse(responseCode = "500", description = "An internal Server Error occurred")
})
public String generate(final InputParameter inputParameter){
    System.out.println(inputTemplate.toString());
    return null;
}

There was also one small setting that I had to change related to Jackson ObjectMapper which is not relevant here because it's my project-specific that I missed in another class. Maybe that was the issue I was facing. Now everything is working as expected.