Spring-MVC: Return ResponseEnvelope

Question

Using Spring, how can I receive the following POST request properly so that I can return a result?

public ResponseEnvelope sendHalfMap(GameID gameID, PlayerID playerID) throws Exception
  {
    java.util.List<HalfMapNode> mapNodes = MapGenerator.generator();
    HalfMap halfMapMessageBody = new HalfMap(playerID.getID(), mapNodes);

    URL halfMapUrl = new URL(baseUrl, "game/" + gameID.getID() + "/halfmap");

    RestTemplate restTemplate = getRestTemplate();
    ResponseEnvelope requestResult = (ResponseEnvelope)restTemplate.postForObject(halfMapUrl.toURI(), halfMapMessageBody, ResponseEnvelope.class);

    return requestResult;
  }

Is the `HalfMap` class one that you created or is it from another library? If it is one that you created, can you please post the source code for it? — Justin Albano, Jan 04 '19 at 17:35
@JustinAlbano The editor does not let me post more code, but here is a link: https://pastebin.com/migpH79B — herecy, Jan 04 '19 at 17:50

score 1 · Accepted Answer · answered Jan 04 '19 at 17:59

1

The issue is seen in the exception message:

Main.NewMapNode does not have a no-arg default constructor.

If the class NewMapNode does not have a default, no-argument constructor, the Spring MVC framework will not be able to create the JAXB context for the NewMapNode and therefore fails. If it not possible to create a default, no-argument constructor for that class, see this SO answer for how to create a customer XmlAdapter.

answered Jan 04 '19 at 17:59

Justin Albano

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You are completely right, turns out I imported the wrong HalfMap implementation. Thanks! – herecy Jan 04 '19 at 18:06

Spring-MVC: Return ResponseEnvelope

1 Answers1