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| |
| <h1>Welcome to Apache Axis2/Java</h1> |
| |
| <p>Apache Axis2™ is a Web Services JSON / SOAP / WSDL engine, the successor to the |
| widely used <a class="externalLink" href="http://ws.apache.org/axis/">Apache Axis</a> SOAP stack. |
| There are two implementations |
| of the Apache Axis2 Web services engine - Apache Axis2/Java and |
| Apache Axis2/C</p> |
| |
| <p>While you will find all the information on Apache Axis2/Java |
| here, you can visit the <a class="externalLink" href="http://axis.apache.org/axis2/c/"><b>Apache Axis2/C</b></a> |
| Web site for Axis2/C implementation information.</p> |
| |
| <p>Apache Axis2, Axis2, Apache, the Apache feather logo, and the Apache Axis2 project logo are trademarks of The Apache Software Foundation.</p> |
| <section> |
| <h3><a name="Why_Apache_Axis2:"></a><i>Why Apache Axis2:</i></h3> |
| |
| <p>A new architecture for Axis2 was introduced during the August |
| 2004 Summit in Colombo, Sri Lanka. The new architecture on which |
| Axis2 is based on is more flexible, efficient and configurable in |
| comparison to <a class="externalLink" href="http://ws.apache.org/axis/java/architecture-guide.html">Axis1.x |
| architecture</a>. Some well established concepts from Axis 1.x, |
| like handlers etc., have been preserved in the new |
| architecture.</p> |
| |
| <p>Apache Axis2 not only supports SOAP 1.1 and SOAP 1.2, but it |
| also has integrated support for the widely popular <a class="externalLink" href="http://www.xfront.com/REST-Web-Services.html">REST style of Web |
| services</a>. The same business logic implementation can offer both |
| a WS-* style interface as well as a REST/POX style interface |
| simultaneously.</p> |
| |
| <p>Apache Axis2 over time has expanded to contemporary JSON |
| (JavaScript Object Notation) web services, and that area |
| is where new development is occuring. In addition to GSON |
| for the Java serialization/deserialization of JSON, Moshi |
| is now supported since GSON development has largely ceased.</p> |
| |
| <p>Apache Axis2 is more efficient, more modular and more |
| XML-oriented / JSON-orientated than the older version. It is |
| carefully designed to support the easy addition of plug-in "modules" |
| that extend their functionality for features such as security and |
| reliability. The <a href="modules/index.html">Modules</a> |
| currently available or under development include:</p> |
| |
| <ul> |
| |
| <li><a class="externalLink" href="http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=wss">WS-Security</a> - Supported by <a class="externalLink" href="http://axis.apache.org/axis2/java/rampart/"> |
| Apache Rampart</a></li> |
| |
| <li><a class="externalLink" href="http://www.w3.org/Submission/ws-addressing/">WS-Addressing</a> -Module included as part of Axis2 |
| core</li> |
| </ul> |
| |
| <p>Apache Axis2 is built on <a class="externalLink" href="http://ws.apache.org/axiom/">Apache AXIOM</a>, a |
| new high performant, pull-based XML object model - however for JSON |
| based web services, Moshi (or GSON) takes its place and largely follows |
| the same pull-based concepts.</p> |
| |
| <p>Axis2 comes with many new features, enhancements and industry |
| specification implementations. The key features offered are as |
| follows:</p> |
| |
| <ul> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>Speed</b> - Axis2 uses |
| its own object model and StAX (Streaming API for XML) parsing to |
| achieve significantly greater speed than earlier versions of Apache |
| Axis.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>Low memory foot |
| print</b>- Axis2 was designed ground-up keeping low memory |
| foot print in mind.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>AXIOM</b> - Axis2 comes |
| with its own light-weight object model, AXIOM, for message |
| processing which is extensible, highly performant and is developer |
| convenient.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b><a name="Hot_Deployment" id="Hot_Deployment"></a>Hot Deployment</b> - Axis2 is equipped |
| with the capability of deploying Web services and handlers while |
| the system is up and running. In other words, new services can be |
| added to the system without having to shut down the server. Simply |
| drop the required Web service archive into the services directory |
| in the repository, and the deployment model will automatically |
| deploy the service and make it available for use.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>Asynchronous Web |
| services</b> - Axis2 now supports asynchronous Web services |
| and asynchronous Web services invocation using non-blocking clients |
| and transports.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>MEP Support</b> - Axis2 |
| now comes handy with the flexibility to support Message Exchange |
| Patterns (MEPs) with in-built support for basic MEPs defined in |
| WSDL 2.0.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>Flexibility</b> - The |
| Axis2 architecture gives the developer complete freedom to insert |
| extensions into the engine for custom header processing, system |
| management, and <i>anything else you can imagine</i>.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>Stability</b> - Axis2 |
| defines a set of published interfaces which change relatively |
| slowly compared to the rest of Axis.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>Component-oriented |
| Deployment</b> - You can easily define reusable networks of |
| Handlers to implement common patterns of processing for your |
| applications, or to distribute to partners.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>Transport Framework</b> |
| - We have a clean and simple abstraction for integrating and using |
| Transports (i.e., senders and listeners for SOAP over various |
| protocols such as SMTP, FTP, message-oriented middleware, etc), and |
| the core of the engine is completely transport-independent.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>WSDL support</b> - Axis2 |
| supports the Web Service Description Language, version <a class="externalLink" href="http://www.w3.org/TR/wsdl">1.1</a> and <a class="externalLink" href="http://www.w3.org/TR/wsdl20/">2.0</a>, which allows you to easily |
| build stubs to access remote services, and also to automatically |
| export machine-readable descriptions of your deployed services from |
| Axis2.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>JSON support</b> - Axis2 |
| supports the creation of Web Services using JavaScript Object Notation, with <a class="externalLink" href="https://github.com/google/gson">GSON</a> and <a class="externalLink" href="https://github.com/square/moshi">Moshi</a>, which allows you to easily |
| build POJO based services that receive and return JSON.</p> |
| </li> |
| |
| <li> |
| |
| <p style="margin-bottom: 0in"><b>Composition and |
| Extensibility</b> - Modules and phases improve support for |
| composability and extensibility. Modules support composability and |
| can also support new WS-* specifications in a simple and clean |
| manner. They are however not <a href="#Hot_Deployment">hot |
| deployable</a> as they change the overall behavior of the |
| system.</p> |
| </li> |
| </ul> |
| |
| <p>We hope you enjoy using Axis2. Please note that this is an |
| open-source effort. If you feel the code could use new features or |
| fixes, or the documentation can be improved, please get involved |
| and lend us a hand! The Axis developer community welcomes your |
| participation.</p> |
| |
| <p>Let us know what you think! Send your feedback on Axis2 to |
| "<a class="externalLink" href="mailto:java-user@axis.apache.org">java-user@axis.apache.org</a>". Make |
| sure to prefix the subject of the mail with [Axis2].</p> |
| </section> |
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