This code demonstrates how to make web service calls with the Play Framework.

Mashup.java

/*
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 * and open the template in the editor.
 */
package controllers;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import java.util.ArrayList;
import java.util.List;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import play.libs.WS;
import play.libs.WS.WSRequest;
import play.mvc.Controller;

/**
 *
 */
public class MashUp extends Controller {

    public static void getDiigoLinks(final int num) {
        List<String> data = new ArrayList<String>();
        WS.authenticate("username", "");
        WSRequest diigoRequest = WS.url("http://api2.diigo.com/bookmarks");
        // get diigo bookmarks
        diigoRequest.setParameter("users", "swgoof");
        diigoRequest.setParameter("rows", Integer.toString(num));
        try {
            JsonElement diigoJson = diigoRequest.get().getJson();
            JsonArray diigoLinks = diigoJson.getAsJsonArray();
            for (int i = 0; i < diigoLinks.size(); i++) {
                JsonObject inner = diigoLinks.get(i).getAsJsonObject();
                data.add(inner.get("title").getAsString() );
                data.add(inner.get("url").getAsString());
                //data.add( inner.get("user").getAsString() );
                data.add( inner.get("tags").getAsString() );
            }
        } catch (Exception ex) {
            data.add("Problem with the Rest call");
            data.add(ex.getMessage());
        }
        mashResult(data);
    }

    public static void postDiigoLink() {

        List<String> data = new ArrayList<String>();
        WS.authenticate("username", "");
        WSRequest diigoRequest = WS.url("http://api2.diigo.com/bookmarks");
        // post bookmark
        diigoRequest.setParameter("title", "MongoHQ - the hosted mongodb solution");
        diigoRequest.setParameter("url", "https://app.mongohq.com/home");
        diigoRequest.setParameter("shared", "yes");
        diigoRequest.setParameter("tags", "mongo, database, cloud_computing");
        diigoRequest.setParameter("desc", "Cloud mongodb hosting.  It includes a free account.");
        try {
            String resp = diigoRequest.post().getJson().getAsJsonObject().get("message").getAsString();
            data.add(resp);
        } catch (Exception ex) {
            data.add("Problem with the Rest call");
            data.add(ex.getMessage());
        }
        mashResult(data);

    }

    public static void getTumblrLinks(final int num) {
        List<String> data = new ArrayList<String>();
        WSRequest tumblrRequest = WS.url("http://gooflog.tumblr.com/api/read");
        // get tumblr posts(links)
        tumblrRequest.setParameter("type", "link");
        tumblrRequest.setParameter("num", Integer.toString(num));
        try {
            Document doc = tumblrRequest.get().getXml();
            NodeList nList = doc.getElementsByTagName("post");  // or put link-text or link-url
            for (int i = 0; i < nList.getLength(); i++) {
                Node node = nList.item(i);
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    Element e = (Element)node;
                    data.add("link-title: " + e.getElementsByTagName("link-text").item(0).getTextContent());
                    data.add("link url: " + e.getElementsByTagName("link-url").item(0).getTextContent());
                    NodeList content = e.getElementsByTagName("link-description");
                    if (content.getLength() > 0) {
                        data.add("link desc: " + content.item(0).getTextContent());
                    }
                    NodeList tags = e.getElementsByTagName("tag");
                    if (tags.getLength() > 0) {
                        for (int t = 0; t < tags.getLength(); t++) {
                        data.add("link tag: " + tags.item(t).getTextContent());
                        }
                    }
                }
            }
        } catch (Exception ex) {
            data.add("Problem with the Rest call");
            data.add(ex.getMessage());
        }
        mashResult(data);
    }


    public static void postTumblrLink() {
        List<String> data = new ArrayList<String>();
        WSRequest tumblrRequest = WS.url("http://www.tumblr.com/api/write");
        tumblrRequest.setParameter("email", "");
        tumblrRequest.setParameter("password", "");
        tumblrRequest.setParameter("type", "link");
        tumblrRequest.setParameter("name", "MongoHQ - the hosted mongodb solution");
        tumblrRequest.setParameter("url", "https://app.mongohq.com/home");
        tumblrRequest.setParameter("description", "Cloud mongodb hosting.  It includes a free account.");
        tumblrRequest.setParameter("tags", "mongo, database,cloud_computing");
        int res = tumblrRequest.post().getStatus();
        data.add("response: " + res);       // 201 means a good response
        mashResult(data);
    }

    /**
     * A method to use the github API.
     */
    public static void viewGithub() {

        // get user info
        WSRequest req = WS.url("http://github.com/api/v2/json/user/show/goof");
        List<String> results = new ArrayList<String>();
        results.add(req.get().getString());

        // get user emails, requires Auth
        req = WS.url("http://github.com/api/v2/xml/user/emails");
        req.setParameter("login", "username");
        req.setParameter("token", "");
        results.add(req.get().getString());

        // get users following binarylogic
        req = WS.url("http://github.com/api/v2/yaml/user/show/swgoof/followers");
        //req.setParameter("login", "username");
        //req.setParameter("token", "");
        results.add(req.get().getString());
        mashResult(results);
    }

    public static void mashResult(List<String> data) {
        render(data);
    }
}