RosterServer: Java

📘
GitHub and JAR download
GitHub
Dowload JAR

Setup

To use RosterServer, you need to download the OneRoster JAR file and add a reference to the JAR file in your project. To do this in IntelliJ, click File -> Project Structure -> Libraries -> Click the plus sign -> Select the JAR File.

Usage

First, import com.classlink.roster.OneRoster.

import com.classlink.roster.OneRoster;

Next, create a new instance of the OneRoster object, which takes in two strings,
the client_id and client_secret.

OneRoster oneRoster = new OneRoster("XXXXXXXXXXXXXXXXXXXXXXXX", "XXXXXXXXXXXXXXXXXXXXXXXX");

You are now able to make requests to a specified URL. This is done using the method makeRosterRequest(url), which takes in the URL and returns a OneRosterResponse object, which contains the status code and response.

OneRoster oneRoster = new OneRoster("XXXXXXXXXXXXXXXXXXXXXXXX", "XXXXXXXXXXXXXXXXXXXXXXXX");
OneRosterResponse response = oneRoster.makeRosterRequest("https://example.com/users");

The response is made up of statusCode, which contains the status code as an int, and response, which contains the JSON response as a string.

System.out.println(response.getStatuscode()); // The status code
System.out.println(response.getResponse()); // The JSON response

Example

📘
Example
Print all students' names

import com.google.gson.Gson;
import java.util.List;
import java.util.Map;

// Import OneRoster
import com.classlink.roster.OneRoster;

public class Example {

    private static List<Map<String, String>> getUsers(String url) {
        // Create new OneRoster object with the client_id and client_secret
        OneRoster oneRoster = new OneRoster("XXXXXXXXXXXXXXXXXXXXXXXX", "XXXXXXXXXXXXXXXXXXXXXXXX");

        // Make the request to the given url
        OneRosterResponse response = rr.makeRosterRequest(url);

        Gson gson = new Gson();

        // If the status code is 200, return Map of users, otherwise print message
        if (response.getStatusCode() == 200) {
            Map<String, List<Map<String, String>>> users = gson.fromJson(response.getResponse(), Map.class);
            return users.get("users");
        }

        switch (response.getStatusCode()) {
            case 401:
                System.out.println("Unauthorized Request\n" + response.getResponse());
                break;
            case 404:
                System.out.println("Not Found\n" + response.getResponse());
                break;
            case 500:
                System.out.println("Server Error\n" + response.getResponse());
                break;
            default:
                System.out.println("Something Went Wrong, status code " + response.getStatusCode() +
                        "\n" + response.getResponse());
                break;
        }

        return null;
    }

    public static void main(String[] args) {
        List<Map<String, String>> users = getUsers(
                "https://example.com/users?fields=givenName%2CfamilyName&filter=role%3D'student'");
        if (users != null) {
            for (Map<String, String> user : users) {
                System.out.println(user.get("givenName") + " " + user.get("familyName"));
            }
        }
    }
}