Its not immediately clear to me how to use the client with a 3rd party service ? about jsonrpc4j HOT 3 CLOSED

I looked at a number of different options. I tried to use the standard java 7 libs where possible.
In the end I found it easier to write a simple invoke method and add that to my code rather than try to get something else working...

This is my call json RPC function using the javax.json.JsonStructure that comes with java 7 EE

import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonObjectBuilder;
import javax.json.JsonReader;
import javax.json.JsonStructure;

public host URL = null // set this to the URL for the json service

public JsonStructure remoteCall(final JsonObject jsondata) throws IOException {

    byte[] data = jsondata.toString().getBytes();
    con = (HttpURLConnection) host.openConnection();
    con.setDoOutput(true);
    con.setUseCaches(true);
    con.setRequestMethod("POST");
    con.setRequestProperty("Content-Type", "application/json");
    con.setRequestProperty("Accept", "application/json");
    con.setRequestProperty("Content-Length", Integer.toString(data.length));
    try (OutputStream out = con.getOutputStream()) {
        out.write(data);
        out.flush();
    }
    if (con.getResponseCode() != HttpURLConnection.HTTP_OK) {
        // Fail
        JsonObjectBuilder error = Json.createObjectBuilder();
        error.addNull("result");
        error.add("error", con.getResponseMessage());
        error.add("id", jsondata.getJsonString("id"));
        return error.build();
        // OK
    } else {
        try (InputStream incomming = con.getInputStream()) {
            JsonStructure repply;
            try (JsonReader reader = Json.createReader(incomming)) {
                repply = reader.read();
                return repply;
            }
        }
    }
} 

It worked pretty well

To provide https

Just cast the con to an https connection
con = (HttpsURLConnection) host.openConnection();

to do authentication in your class constructor add something like this

public RemoteService(URL host, final String username, final String password) {

    user = username;
    pass = password;
    this.host = host;

    Authenticator.setDefault(new Authenticator() {
        @Override
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(user, pass.toCharArray());
        }
    });

}

from jsonrpc4j.

It uses The Jackson Library for JSON deserialization/serialization. But it is used internally and don't let the programmer change the options. On the other hand you CAN'T deserialize an Interface because you can't instantiate it, but if you provide a field indicating the implementation you can work do the correct deserialization externally, by providing a request listener which will receive the response in an Jackson's ObjectMapper, you can obtain the original JSON from that object and use Gson which is a better JSON library. With Gson you can create a JSON Deserializer implementation for the interface and create the correct implementation... Damn I'm at work right now and I'm loosing my time helping some random user... I hope this will be useful to you. I will tell you how I use this library, I have a class called RpcClient which is a wrapper of JsonHttpClient, I pass to it a reference to the original caller, the method, the params, the class type, and a symbolic string indicating the type of request (request for get a list of clients, get a single client, etc...). I call the invoke method of jsonhttpclient passing the appropiate parameters(which I received from the original caller), then I do a callback to the original caller passing the response as a generic object and the request type, then on the original caller I do the appropiate cast based on the request type and work with it. To handle Exceptions, I will pass the exception object of the catch to the original caller, so I can use instance of to check if the response it's an exception and show an error message to the user.

from jsonrpc4j.

The README.md explains everything very well. You must have some knowledge of jsonrpc to begin with though.

from jsonrpc4j.