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<h2 id="history">History</h2> <p>Originally, the Glassfish project developed two semi-independent projects: </p> <ul><li>JAX-WS RI, the Reference implementation of the <a href="/facts/JAX-WS/xcIMaPgp">JAX-WS</a> specification</li> <li><a href="/facts/Metro_WSIT/C13TLrVL">WSIT</a>, a Java implementation of some of the <a href="/facts/WS-*/x4qDdmTj">WS-*</a> and an enhanced support for interoperability with the <a href="/facts/.NET_Framework/J6QDAUhP">.NET Framework</a>. It is based on JAX-WS RI as "Web Service layer".</li></ul> <p>In June 2007, it was decided to bundle these two components as a single component named Metro.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> <h2 id="features">Features</h2> <p>Metro compares well with other web service frameworks in terms of functionality. Codehaus started a comparison<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> which compared <a href="/facts/Apache_Axis/D3qrsLtL">Apache Axis</a> 1.x, Axis 2.x, <a href="/facts/Celtix/AsxDPrHs">Celtix</a>, 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 <a href="/facts/The_Apache_Software_Foundation/Xl9Tt9lE">the ASF</a> to replace Celtix with <a href="/facts/Apache_CXF/wk5DJ8rP">CXF</a> and to include <a href="/facts/Oracle_Application_Server/u7SMACoT">OracleAS 10g</a>.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> </p><p>Metro includes <a href="/facts/JAXB/GTgm2Vvj">JAXB</a> RI, <a href="/facts/JAX-WS/xcIMaPgp">JAX-WS</a> RI, <a href="/facts/SAAJ/Kg5QyHu3">SAAJ</a> RI, SJSXP, and <a href="/facts/Metro_WSIT/C13TLrVL">WSIT</a>, along with libraries that those components depend on, such as xmlstreambuffer, mimepull, etc.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> </p><p>Its features include: </p> <ul><li>Basic Profile 1.1 Compliant</li> <li>Easily Create Services from POJOs</li> <li>RPC-Encoding</li> <li>Spring Support</li> <li>REST Support</li> <li>Soap 1.1/1.2</li> <li>Streaming XML (StAX based)</li> <li>WSDL 1.1 ->Code (Client)/(Server)</li> <li>Server and Client-side Asynchrony<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a></li></ul> <p>Supported WS-* Standards<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> </p> <table><tbody><tr><td>WS-Addressing</td><td>WS-Atomic Transaction</td><td>WS-Coordination</td></tr><tr><td>WS-Metadata Exchange</td><td>WS-ReliableMessaging</td><td>WS-Policy</td></tr><tr><td>WS-Secure Conversation</td><td>WS-Security Policy</td><td>WS-Security</td></tr><tr><td>WS-Trust</td><td>WSDL 1.1 Support</td><td></td></tr></tbody></table> <p>Supported Transport protocols include: </p> <ul><li>HTTP</li> <li>JMS</li> <li>SMTP/POP3</li> <li>TCP</li> <li>In-VM</li></ul> <p>Metro augments the JAX-WS environment with advanced features such as trusted, end-to-end security; optimized transport (<a href="/facts/Message_Transmission_Optimization_Mechanism/czoTpJxu">MTOM</a>, <a href="/facts/Fast_Infoset/6T4kUXdd">Fast Infoset</a>), reliable messaging, and transactional behavior for SOAP web services. </p> <h2 id="market-share">Market share</h2> <p>Metro is bundled with <a href="/facts/Java_Platform,_Standard_Edition/1HMPhdsv">Java SE</a> 6 in order to allow consumers of Java SE 6 to consume Web Services.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> </p><p>Metro is bundled with numerous application servers such as:<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> </p> <ul><li><a href="/facts/GlassFish/Y45eWxx3">GlassFish</a></li> <li><a href="/facts/Sun_Java_System_Application_Server/Y45eWxx3">Sun Java System Application Server</a> Platform Edition 9.x</li> <li><a href="/facts/Oracle_Weblogic_Server/bVPLchyr">Oracle WebLogic Server</a></li> <li><a href="/facts/JBoss/sdwoM5jn">JBoss</a> (version 5.x only)</li> <li><a href="/facts/TmaxSoft/FcbqsMnL">TmaxSoft</a> JEUS 6.x</li></ul> <p>The <a href="/facts/JAXB/GTgm2Vvj">JAXB</a> reference implementation developed for Metro is used in virtually every Java Web Services framework (<a href="/facts/Apache_Axis2/kzHWCkdU">Apache Axis2</a>, <a href="/facts/Codehaus_XFire/wk5DJ8rP">Codehaus XFire</a>, <a href="/facts/Apache_CXF/wk5DJ8rP">Apache CXF</a>) and Application Servers. </p> <h2 id="external-links">External links</h2> <ul> <li>Free and open-source software portal</li></ul> <ul><li><a href="https://projects.eclipse.org/projects/ee4j.metro">Official website</a> </li> <li><a href="https://projects.eclipse.org/projects/ee4j.metro">Eclipse Metro</a> project as a part of Eclipse Enterprise for Java (EE4J)</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"metro: Discover Metro". Archived from the original on 2007-07-08. <a href="https://web.archive.org/web/20070708134345/https://metro.dev.java.net/discover/" target="_blank">https://web.archive.org/web/20070708134345/https://metro.dev.java.net/discover/</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"metro: Metro FAQ". <a href="http://metro.java.net/discover/faq.html" target="_blank">http://metro.java.net/discover/faq.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Gupta, Arun (June 19, 2007). "Announcing Metro - Naming the Web Services stack in GlassFish". Miles to go…. blogs.sun.com. Archived from the original on 2009-09-26. <a href="https://web.archive.org/web/20090926144443/http://blogs.sun.com/arungupta/entry/announcing_metro_naming_the_web" target="_blank">https://web.archive.org/web/20090926144443/http://blogs.sun.com/arungupta/entry/announcing_metro_naming_the_web</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"Stack Comparison". XFire. xfire.codehaus.org. Archived from the original on 2006-12-30. <a href="https://web.archive.org/web/20061230114334/http://xfire.codehaus.org/Stack+Comparison" target="_blank">https://web.archive.org/web/20061230114334/http://xfire.codehaus.org/Stack+Comparison</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"StackComparison". Apache Web Services Wiki. Apache Wiki Farm. Archived from the original on 2017-09-04. <a href="https://web.archive.org/web/20170904141955/https://wiki.apache.org/ws/StackComparison" target="_blank">https://web.archive.org/web/20170904141955/https://wiki.apache.org/ws/StackComparison</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>"Metro". <a href="https://metro.java.net/discover/faq.html" target="_blank">https://metro.java.net/discover/faq.html</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"StackComparison". Apache Web Services Wiki. Apache Wiki Farm. Archived from the original on 2017-09-04. <a href="https://web.archive.org/web/20170904141955/https://wiki.apache.org/ws/StackComparison" target="_blank">https://web.archive.org/web/20170904141955/https://wiki.apache.org/ws/StackComparison</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>"StackComparison". Apache Web Services Wiki. Apache Wiki Farm. Archived from the original on 2017-09-04. <a href="https://web.archive.org/web/20170904141955/https://wiki.apache.org/ws/StackComparison" target="_blank">https://web.archive.org/web/20170904141955/https://wiki.apache.org/ws/StackComparison</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>"JAX-WS FAQ". jax-ws. Archived from the original on 2007-08-07. <a href="https://web.archive.org/web/20070807124130/https://jax-ws.dev.java.net/faq/index.html#different_versions" target="_blank">https://web.archive.org/web/20070807124130/https://jax-ws.dev.java.net/faq/index.html#different_versions</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Gupta, Arun (July 22, 2007). "Metro - Now on Tomcat 6.x also". GlassFish. blogs.sun.com. Archived from the original on 2009-06-15. <a href="https://web.archive.org/web/20090615134727/http://blogs.sun.com/theaquarium/entry/metro_now_on_tomcat_6" target="_blank">https://web.archive.org/web/20090615134727/http://blogs.sun.com/theaquarium/entry/metro_now_on_tomcat_6</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> </ol>