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Restlet 270
Restlet
Stable release 2.0.0 / July 19, 2010
Development status Active
Written in Java
Operating system Cross-platform
Website http:/ / www. restlet.
org/
Restlet is a lightweight, comprehensive, open source REST framework for the Java platform. Restlet is suitable for
both server and client Web applications. It supports major Internet transport, data format, and service description
standards like HTTP and HTTPS, SMTP, XML, JSON, Atom, and WADL. A GWT port of the client-side library is
also available.
Licenses
Restlet is available under four different licenses: [1]
• CDDL ver 1.0
• LGPL ver 2.1
• LGPL ver 3.0
• EPL ver 1.0
Architecture
Restlet directly models the concepts (Resource, Representation, Connector, Component, etc.) from Roy T. Fielding's
original dissertation on the architecture of the Web, Architectural Styles and the Design of Network-based Software
Architectures [2] .
The Restlet framework is composed of two main parts. First, there is the "Restlet API", a neutral API supporting the
concepts of REST and facilitating the handling of calls for both client-side and server-side applications. This API
must be supported by a Restlet implementation before it can effectively be used. Multiple implementations could be
provided (open source projects or commercial products).
It is available in five consistent editions. Each edition targets a special development environment:
• Google Web Toolkit (GWT) for AJAX applications deployed in desktop browsers, without any plugin required;
• Google App Engine (GAE/J) for deployment on Google’s cloud computing infrastructure;
• Android for deployment on compatible smartphones;
• Java SE for standalone deployments in regular Java Virtual Machines;
• Java EE for deployment in Servlet engines.