| Metro | |
| Author: | Sun Microsystems |
| Developer: | Eclipse Foundation |
| Latest Release Version: | 3.0.1 |
| Programming Language: | Java |
| Engines: | --> |
| Platform: | Jakarta EE |
| Genre: | web service framework |
Metro is a high-performance, extensible, easy-to-use web service stack. Although historically an open-source part of the GlassFish application server, it can also be used in a stand-alone configuration.[1] Components of Metro include: JAXB RI, JAX-WS RI, SAAJ RI, StAX (SJSXP implementation) and WSIT. Originally available under the CDDL and GPLv2 with classpath exception,[2] it is now available under
Originally, the Glassfish project developed two semi-independent projects:
In June 2007, it was decided to bundle these two components as a single component named Metro.[3]
Metro compares well with other web service frameworks in terms of functionality. Codehaus started a comparison[4] which compared Apache Axis 1.x, Axis 2.x, Celtix, Glue, JBossWS, Xfire 1.2 and JAX-WS RI + WSIT (the bundle was not yet named Metro at that time). This was later updated by the ASF to replace Celtix with CXF and to include OracleAS 10g.[5]
Metro includes JAXB RI, JAX-WS RI, SAAJ RI, SJSXP, and WSIT, along with libraries that those components depend on, such as xmlstreambuffer, mimepull, etc.[6]
Its features include:
Supported WS-* Standards[5]
| WS-Addressing | WS-Atomic Transaction | WS-Coordination |
| WS-Metadata Exchange | WS-ReliableMessaging | WS-Policy |
| WS-Secure Conversation | WS-Security Policy | WS-Security |
| WS-Trust | WSDL 1.1 Support | |
Supported Transport protocols include:
Metro augments the JAX-WS environment with advanced features such as trusted, end-to-end security; optimized transport (MTOM, Fast Infoset), reliable messaging, and transactional behavior for SOAP web services.
Metro is bundled with Java SE 6 in order to allow consumers of Java SE 6 to consume Web Services.[7]
Metro is bundled with numerous application servers such as:[8]
The JAXB reference implementation developed for Metro is used in virtually every Java Web Services framework (Apache Axis2, Codehaus XFire, Apache CXF) and Application Servers.