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Metro is an opensource web service stack that is a part of the GlassFish project, though it can also be used in a stand-alone configuration. Open source is a development methodology which offers practical accessibility to a product's source (goods and knowledge A Web service (also Web Service) is defined by the W3C as "a software system designed to support interoperable machine-to-machine interaction GlassFish is an open source Application server project led by Sun Microsystems for the Java Enterprise Edition (Java EE platform [1] Components of metro include JAXB RI, JAX-WS RI, SAAJ RI, SJSXP, and WSIT. Java Architecture for XML Binding ( JAXB) allows Java developers to map Java classes to XML representations The Java API for XML Web Services (JAX-WS is a Java programming language API for creating Web services It is part of the Java EE platform from The SOAP with Attachments API for Java or SAAJ provides a standard way to send XML documents over the Internet from the Java platform Web Services Interoperability Technology (WSIT is an Open-source project started by Sun Microsystems to develop the next-generation of Web service technologies It is available under the CDDL and GPLv2 (with classpath exception. Common Development and Distribution License (CDDL is a Free software license, produced by Sun Microsystems, based on the Mozilla Public License (MPL )[2]
It is supported by Sun Microsystems. Sun Microsystems Inc ( is a multinational vendor of Computers computer components Computer software, and Information technology services
History
Originally, the Glassfish project developed two semi-independent project :
- JAX-WS RI, the Reference implementation of the JAX-WS specification
- WSIT, a Java implementation of some of the WS-* and an enhanced support for interoperability with the .Net Framework. The Java API for XML Web Services (JAX-WS is a Java programming language API for creating Web services It is part of the Java EE platform from Web Services Interoperability Technology (WSIT is an Open-source project started by Sun Microsystems to develop the next-generation of Web service technologies There are a variety of specifications associated with Web services These specifications are in varying degrees of maturity and are maintained or supported by various standards bodies It is based on JAX-WS RI as "Web Service layer".
In June 2007, it has been decided to bundle these two components as a single component named Metro[1].
Market share
Metro is bundled with Java Standard Edition 6 in order to allow consumers of JSE 6 to consume Web Services [2]
Metro is bundled with numerous Application Servers [3] such as :
- GlassFish
- Sun Java System Application Server Platform Edition 9. Java Platform Standard Edition or Java SE is a widely used platform for Programming in the Java language GlassFish is an open source Application server project led by Sun Microsystems for the Java Enterprise Edition (Java EE platform The Sun Java System Application Server, or SJSAS, is a platform for delivering server-side Java applications and Web services x
- BEA WebLogic
- JBoss (as of version 5. Owned by Oracle Corporation, BEA WebLogic is a J2EE platform product family that includes A J2EE Application server, WebLogic JBoss Application Server (or JBoss AS) is a Free software / open source Java EE -based Application server. x)
- TmaxSoft JEUS 6. x
The JAXB reference implementation developed for Metro is used in virtually every Web Services framework (Apache Axis2, Codehaus XFire, Apache CXF) and Application Servers. Java Architecture for XML Binding ( JAXB) allows Java developers to map Java classes to XML representations Codehaus XFire is a Java Framework for development and consumption of Web services.
Features
Metro usually behave very well when compared to other web services frameworks in term of functionality. An example of such a comparison is realized by Codehaus at [4], it compares the 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 this time).
See also
- Apache CXF