Software:WSO2 Mashup Server

Short description: Mashup platform

WSO2 Mashup Server

Developer(s)	WSO2 and Community
Initial release	January 28, 2008 (2008-01-28)
Final release	2.3.2
Written in	Java
Operating system	Cross-platform
Available in	English
Type	Application server
License	Apache License 2.0
Website	{{{1}}}

WSO2 Mashup Server, an open-source mashup platform that used to host JavaScript-based mashups, is now deprecated and no longer in use. It was based on Apache Axis2 and other open-source projects, and allowed JavaScript to consume, compose and emit web services, feeds, scraped web pages, email, and instant messages. The source code was freely available under the open-source Apache License. It provided a runtime platform for developing and deploying mashups and could be downloaded and deployed locally or within an organization.

WSO2 Mashup Server was web-services-centric in that each mashup exposed a new web service, which could be consumed by other mashups, web service clients, or Ajax style web pages. The securability of web services made them an attractive technology within organizations deploying a service-oriented architecture (SOA) and for business mashups.

On December 8, 2012, WSO2 Mashup Server was retired since its remaining functionality, JavaScript web service hosting, was folded into WSO2 Application Server. WSO2 Application Server eventually became a set of extensions to Apache Tomcat and JavaScript hosting was provided by Jaggery based upon Rhino.

JavaScript as a mashup composition language

Mashups are composed using server side JavaScript in WSO2 Mashup Server. A set of language extensions along with E4X provides domain specific features such as;

• Calling other SOAP/REST web services
• RSS/Atom feed reading and writing
• Web scraping
• APP based publishing
• Periodic task scheduling
• E-mailing
• Instant messages

A Hello World

function hello() {
    return "Hello World";
}

Calling a SOAP web service

function invokeGetVersionService(){
    var version = new WSRequest();

    var options = new Array();
    options.useSOAP = 1.2;
    options.useWSA = 1.0;
    options.action = "http://services.mashup.wso2.org/version/ServiceInterface/getVersionRequest";

    var payload = null;
    var result;

    try {
        version.open(options,"http://localhost:7762/services/system/version", false);
        version.send(payload);
        result = version.responseE4X;
    } catch (e) {
        system.log(e.toString(),"error");
        return e.toString();
    }
    return result;
}

Working with feeds

// Creating an RSS 2.0 feed and writing it to file.
function createRssFeed() {
    // Creating the Feed
    var feed = new Feed();
    feed.feedType = "rss_2.0";
    feed.title = "This is a test Feed";
    feed.description = "This feed demonstrates the use of Feed host object to create an RSS 2.0 feed.";
    feed.link = "http://mooshup.com/rss20.xml";
 
    // Creating Entries in the Feed
    var entry = new Entry();
    entry.title = "This is a test entry.";
    entry.description = "This is a sample entry demonstrating the use of the Entry host object.";
    feed.insertEntry(entry);
 
    var entry2 = new Entry();
    entry2.title = "This is another test entry.";
    entry2.description = "This is a sample entry demonstrating the use of the Entry host object.";
 
    // Adding a Media Module to the entry
    var mediaModule = new
    MediaModule("http://www.earthshots.org/photos/387.jpg");
    mediaModule.copyright = "2007 Tad Bowman";
    mediaModule.type = "image/jpeg";
    mediaModule.thumbnail = "http://www.earthshots.org/photos/387.thumb.jpg";
    entry2.addMediaModule(mediaModule);
 
    feed.insertEntry(entry2);
 
    // Writing the newly created Feed to a File
    var result = feed.writeTo("test-created-rss-feed.xml");
 
    return result;
}

Web scraping

function webScrape() {
  var config = <config>
                  <var-def name='response'>
                      <html-to-xml>
                          <http method='get' url='http://ww2.wso2.org/~builder/'/>
                      </html-to-xml>
                  </var-def>
               </config>;

  var scraper = new Scraper(config);
  result = scraper.response;

  return result;
}

The syntax is identical to another open-source web scraping tool called web harvest.

Working with APP

function persistAuthenticatedAppFeed() {
  // Creating an instance of APPClient
  var client = new APPClient();

  // Creating an instance of AtomFeed
  var feed = new AtomFeed();

  // Setting login credentials for the client
  client.credentials = {username: "you@email.com", password: "xxx", service: "blogger", authtype: "google"};

  // Retrieving and online feed
  feed = client.getFeed("http://blog.mooshup.com/feeds/posts/default");

  // Getting an array of individual entries from the feed
  var entries = new Array();
  entries = feed.getEntries();

  // Writing the retrieved feed to a file
  feed.writeTo("my-file-name.xml");
}

Periodic task scheduling

// Scheduling a function to be executed every 2 seconds
var uuid = system.setInterval('myJavaScriptFunction("parameterValue")', 2000);

// Stopping the above scheduled task
system.clearInterval(uuid);

Sending an e-mail

function sendEmail(){
  var email = new Email("host", "port", "username", "password");
  var file = new File("temp.txt");
  email.from = "test@wso2.com";
  email.to = "test@wso2.com"; // alternatively message.to can be an array of strings. Same goes for cc and bcc
  email.cc = "test@wso2.com";
  email.bcc = "test@wso2.com";
  email.subject = "WSO2 Mashup server 1.0 Released";
  email.addAttachement(file, "temp.txt"); // Optionally can add attachments, it has a variable number of arguments. each argument can be a File hostObject or a string representing a file.
                                          // In this case we are sending two attachments (this demonstrates sending attachments using either a File Host Object or a path to the file).
  email.text = "WSO2 Mashup server 1.0 was Released on 28th January 2008";
  email.send();
}

See also

• Mashup (web application hybrid)
• ECMAScript for XML
• Web scraping
• Yahoo! Pipes
• Yahoo! query language