JOnAS › Click to download › Updated Info

JOnAS is the Open Source implementation by ObjectWeb of the J2EETM specification. JOnAS is a pure JavaTM implementation of this specification that relies on the JDK. JOnAS is part of the ObjectWeb Open Source initiative, which was launched in collaboration with several partners including Bull, the France Telecom R&D division and INRIA.

JOnAS provides:

• EJB™, Web and Client containers for J2EE™ applications;
• Web Services;
• Clustering (at RMI and HTTP levels);
• Scalability;
• Interoperability;
• Distributed transactions;
• Security support;
• JMX™ based management;
• JMS™ integration;
• J2EECA™ (Connector Architecture);
• Built-in and user services, for easier server configuration and customization.

JOnAS has been used to develop large-scale enterprise applications like: e-commerce, eportal, management systems, intranet application, document processing, inventory systems, reservation systems, banking applications, etc.



JOnAS is architectured in term of services. The main components of JOnAS are the following services:

• EJB container provided by a set of Java classes and a tool to generate interposition classes; JOnAS relies on the JORM and MEDOR ObjectWeb projects for implementing CMP2.0;
• A Java Transaction Manager (JOTM) providing transaction support and distributed transaction coordination;
• A JDBC service providing database connections management (a J2EECA™ JDBC Connector is also provided);
• A Messaging Service: JOnAS is integrated with JORAM which is the Open Source implementation of JMS™ (Java Messaging Service) from Objectweb. JOnAS may also embed other JMS implementations;
• A Security Service, with JAAS™, JACC™, certificates, and LDAP support;
• A Management Service (JMX based) accessible from a servlet-based GUI;
A Connector Resource Service for deploying J2EECA™-compliant Resource Adapters (incl. JDBC and JORAM ones);
• A Web Container Service for running a Servlet/JSP engine (currently Tomcat or Jetty) as a JOnAS service in the same JVM;
• An EAR Service, for deploying J2EE applications packaged as EAR files;
• A Mail Service, providing application components with the necessary resources to send e-mails;
• A Communication Service, relying on the CAROL ObjectWeb project, providing support for several RMI protocols as JRMP, IIOP, Jeremie or CMI (for cluster);
• A Service providing Web Services support, based on AXIS;
• A set of tools to develop, deploy and manage applications (plugins for Eclipse/JBuilder, Xdoclet, …).