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| |
| <h1>Apache Axis2 User's Guide</h1> |
| |
| <p>This guide provides a starting place for users who are new to |
| Apache Axis2. It also covers some advanced topics, such as how to |
| use Axis2 to create and deploy Web services as well as how to use |
| WSDL to generate both clients and services.</p> |
| For experienced users of Apache Axis2, we recommend the <a href="adv-userguide.html">Advanced User's Guide.</a> <a name="intro" id="intro"></a> |
| |
| <h1>Introducing Axis2</h1> |
| |
| <p>This section introduces Axis2 and its structure, including an |
| explanation of various directories/files included in the latest |
| Axis2 <a href="../download.cgi">download</a>.</p> |
| |
| <div class="section"> |
| <h2><a name="Content"></a>Content</h2> |
| |
| <ul> |
| |
| <li><a href="userguide.html#intro"><b>Introducing |
| Axis2</b></a><br /> |
| |
| <ul> |
| |
| <li><a href="userguide.html#whatis"><b>What is |
| Axis2?</b></a></li> |
| |
| <li><a href="userguide.html#underhood"><b>What's under the |
| hood?</b></a></li> |
| |
| <li><a href="userguide.html#handlessoap"><b>How Axis2 handles |
| SOAP messages</b></a></li> |
| |
| <li><a href="userguide.html#distributions"><b>Axis2 |
| Distributions</b></a></li> |
| |
| <li><a href="userguide.html#sbd"><b>The Axis2 Standard Binary |
| Distribution</b></a></li> |
| |
| <li><a href="userguide.html#hierarchy"><b>Axis2.war Directory |
| Hierarchy</b></a></li> |
| |
| <li><a href="userguide.html#docs"><b>Axis2 Documents |
| Distribution</b></a></li> |
| |
| <li><a href="userguide.html#clients"><b>Axis2 and |
| Clients</b></a></li> |
| </ul> |
| </li> |
| |
| <li><a href="userguide-installingtesting.html#installingtesting">Installing and |
| Testing Client Code</a></li> |
| |
| <li><a href="userguide-introtoservices.html#introservices">Introduction to |
| Services</a><br /> |
| |
| <ul> |
| |
| <li><a href="userguide-introtoservices.html#messageexchange">Message Exchange |
| Patterns</a></li> |
| </ul> |
| </li> |
| |
| <li><a href="userguide-creatingclients.html#createclients">Creating |
| Clients</a><br /> |
| |
| <ul> |
| |
| <li><a href="userguide-creatingclients.html#choosingclient">Choosing a Client |
| Generation Method</a></li> |
| |
| <li><a href="userguide-creatingclients.html#generating">Generating |
| Clients</a></li> |
| |
| <li><a href="userguide-creatingclients.html#adb">Axis Data Binding |
| (ADB)</a></li> |
| </ul> |
| </li> |
| |
| <li><a href="userguide-buildingservices.html#buildservices">Building |
| Services</a><br /> |
| |
| <ul> |
| |
| <li><a href="userguide-buildingservices.html#getcomfortable">Getting |
| Comfortable with Available Options</a></li> |
| |
| <li><a href="userguide-buildingservices.html#createscratch">Creating a Service |
| from Scratch</a></li> |
| |
| <li><a href="userguide-buildingservices.html#deploypojo">Deploying |
| Plain Old Java Objects</a></li> |
| |
| <li><a href="userguide-buildingservices.html#deployrun">Deploying |
| and Running an Axis2 Service Created from WSDL</a></li> |
| </ul> |
| </li> |
| |
| <li><a href="userguide-samples.html">Samples</a></li> |
| |
| <li><a href="userguide-forfurtherstudy.html">For Further |
| Study</a></li> |
| </ul> |
| <a name="whatis" id="whatis"></a> |
| |
| <div class="section"> |
| <h2><a name="What_is_Axis2"></a>What is Axis2?</h2> |
| |
| <p>The Apache Axis2 project is a Java-based implementation of both |
| the client and server sides of the Web services equation. Designed |
| to take advantage of the lessons learned from Apache Axis 1.0, |
| Apache Axis2 provides a complete object model and a modular |
| architecture that makes it easy to add functionality and support |
| for new Web services-related specifications and |
| recommendations.</p> |
| |
| <p>Axis2 enables you to easily perform the following tasks:</p> |
| |
| <ul> |
| |
| <li>Send SOAP messages</li> |
| |
| <li>Receive and process SOAP messages</li> |
| |
| <li>Create a Web service out of a plain Java class</li> |
| |
| <li>Create implementation classes for both the server and client |
| using WSDL</li> |
| |
| <li>Easily retrieve the WSDL for a service</li> |
| |
| <li>Send and receive SOAP messages with attachments</li> |
| |
| <li>Create or utilize a REST-based Web service</li> |
| |
| <li>Create or utilize services that take advantage of <a class="externalLink" href="http://www.oasis-open.org/committees/download.php/16790/wss-v1.1-spec-os-SOAPMessageSecurity.pdf"> |
| WS-Security</a> and <a class="externalLink" href="http://www.w3.org/2002/ws/addr/">WS-Addressing</a></li> |
| </ul> |
| |
| <p>Many more features exist as well, but this user guide |
| concentrates on showing you how to accomplish the first five tasks |
| on this list.</p> |
| <a name="underhood" id="underhood"></a> |
| |
| <div class="section"> |
| <h2><a name="Whats_Under_the_Hood"></a>What's Under the Hood?</h2> |
| |
| <p>To understand Axis2 and what it does, you must have a good idea |
| of the life cycle of a Web services message. Typically, it looks |
| something like this:</p> |
| |
| <p><img src="images/fig01.jpg" alt="Lifecycle of a Web services message" /><br /></p> |
| |
| <p>The sending application creates the original SOAP message, an |
| XML message that consists of headers and a body. (For more |
| information on SOAP, see "<a href="userguide-introtoservices.html">Introduction to Services</a>".) |
| If the system requires the use of WS* recommendations such as |
| WS-Addressing or WS-Security, the message may undergo additional |
| processing before it leaves the sender. Once the message is ready, |
| it is sent via a particular transport such as HTTP, JMS, and so |
| on.</p> |
| |
| <p>The message works its way over to the receiver, which takes in |
| the message via the transport listener. (In other words, if the |
| application doesn't have an HTTP listener running, it's not going |
| to receive any HTTP messages.) Again, if the message is part of a |
| system that requires the use of WS-Security or other |
| recommendations, it may need additional processing for the purpose |
| of checking credentials or decrypting sensitive information. |
| Finally, a dispatcher determines the specific application (or other |
| component, such as a Java method) for which the message was |
| intended, and sends it to that component. That component is part of |
| an overall application designed to work with the data being sent |
| back and forth.</p> |
| <a name="handlessoap" id="handlessoap"></a> |
| |
| <div class="section"> |
| <h2><a name="How_Axis2_Handles_SOAP_Messages"></a>How Axis2 Handles SOAP Messages</h2> |
| |
| <p>Axis2 can handle processing for both the sender and the receiver |
| in a transaction. From the Axis2 perspective, the structure looks |
| like this:</p> |
| |
| <p><img src="images/fig02.jpg" alt="Axis2 handles SOAP messages" /><br /></p> |
| |
| <p>On each end, you have an application designed to deal with the |
| (sent or received) messages. In the middle, you have Axis2, or |
| rather, you <i>can</i> have Axis2. The value of Web services is |
| that the sender and receiver (each of which can be either the |
| server or the client) don't even have to be on the same platform, |
| much less running the same application. Assuming that Axis2 is |
| running on both sides, the process looks like this:</p> |
| |
| <ul> |
| |
| <li>The sender creates the SOAP message.</li> |
| |
| <li>Axis "handlers" perform any necessary actions on that message |
| such as encryption of WS-Security related messages.</li> |
| |
| <li>The transport sender sends the message.</li> |
| |
| <li>On the receiving end, the transport listener detects the |
| message.</li> |
| |
| <li>The transport listener passes the message on to any handlers on |
| the receiving side.</li> |
| |
| <li>Once the message has been processed in the "pre-dispatch" |
| phase, it is handed off to the dispatchers, which pass it on to the |
| appropriate application.</li> |
| </ul> |
| |
| <p>In Axis2, these actions are broken down into "phases", with |
| several pre-defined phases, such as the "pre-dispatch", "dispatch," |
| and "message processing", being built into Axis2. Each phase is a |
| collection of "handlers". Axis2 enables you to control what |
| handlers go into which phases, and the order in which the handlers |
| are executed within the phases. You can also add your own phases |
| and handlers.</p> |
| |
| <p>Handlers come from "modules" that can be plugged into a running |
| Axis2 system. These modules, such as Rampart, which provides an |
| implementation of WS-Security, are the main extensibility |
| mechanisms in Axis2.</p> |
| <a name="distributions" id="distributions"></a> |
| |
| <div class="section"> |
| <h2><a name="Axis2_Distributions"></a>Axis2 Distributions</h2> |
| |
| <p>Axis2 is released in several <a href="../download.cgi"> |
| distributions</a>. Which one you need depends on what you'll be |
| doing with it.</p> |
| <a name="sbd" id="sbd"></a> |
| |
| <div class="section"> |
| <h3><a name="The_Axis2_Standard_Binary_Distribution"></a>The Axis2 Standard Binary Distribution</h3> |
| |
| <p>If you're developing services and applications, you'll need the |
| Axis2 Standard Binary Distribution. The distribution includes all the |
| necessary *.jar files, as well as a variety of scripts that ease |
| development. It has the following structure.</p> |
| |
| <p><b>Code Listing 1: Axis2 Standard Binary Distribution</b></p> |
| |
| <div> |
| <pre> |
| bin |
| axis2.bat |
| axis2.sh |
| axis2server.bat |
| axis2server.sh |
| java2wsdl.bat |
| java2wsdl.sh |
| wsdl2java.bat |
| wsdl2java.sh |
| setenv.sh |
| lib |
| activation-1.1.jar |
| ... |
| XmlSchema.jar |
| repository |
| modules |
| modules.list |
| addressing-1.1.mar |
| .. |
| services |
| services.list |
| version.aar |
| .. |
| samples |
| ... |
| webapp |
| ... |
| conf |
| axis2.xml |
| |
| LICENSE.txt |
| README.txt |
| NOTICE.txt |
| INSTALL.txt |
| release-notes.html |
| </pre></div> |
| |
| <p>The bin directory includes a number of useful scripts. They |
| include axis2.bat (or axis2.sh), which enables you to easily |
| execute a Java command without having to manually add all the Axis2 |
| jar files to the classpath, java2wsdl.bat (and .sh) and |
| wsdl2java.bat (and .sh), which enable you to easily generate Java |
| code from a WSDL file and vice versa, and axis2server.bat (and sh), |
| a simple Web server that enables you to build Axis2's capability to |
| send and receive messages into your own application.</p> |
| |
| <p>As expected, the lib directory includes all the necessary .jar |
| files. Services and modules are added to the repository directory. |
| Axis2 comes with a standard module implementing WS-Addressing, and |
| you can add any other necessary module such as Rampart to the |
| repository/modules directory.</p> |
| |
| <p>conf directory includes the axis2.xml which is the global |
| deployment descriptor.</p> |
| |
| <p>Finally, the samples directory includes all the sample code |
| distributed with Axis2. See the list of <a href="userguide-samples.html">samples and their descriptions</a>.</p> |
| <a name="hierarchy" id="hierarchy"></a> |
| </div> |
| <div class="section"> |
| <h2><a name="axis2.war_Distribution_Directory_Hierarchy"></a>axis2.war Distribution Directory Hierarchy</h2> |
| |
| <p>axis2.war is available in <a href="../download.cgi"> |
| WAR (Web Archive) Distribution</a>. The server side of Axis2 ships |
| as a J2EE application, and has the following structure shown in |
| Code Listing 2.</p> |
| |
| <p><b>Code Listing 2: Server Side of Axis2</b></p> |
| |
| <div> |
| <pre> |
| axis2-web |
| META-INF |
| WEB-INF |
| classes |
| conf |
| axis2.xml |
| lib |
| activation.jar |
| ... |
| xmlSchema.jar |
| modules |
| modules.list |
| addressing.mar |
| ... |
| soapmonitor.mar |
| services |
| services.list |
| aservice.aar |
| ... |
| version.aar |
| web.xml |
| </pre></div> |
| |
| <p>Starting at the top, axis2-web is a collection of JSPs that make |
| up the <a href="webadminguide.html">Axis2 administration |
| application</a>, through which you can perform any needed actions |
| such as adding services and engaging and dis-engaging modules. The |
| WEB-INF directory represents the actual Axis2 application, |
| including all the *.jar files, any included modules, and even the |
| deployed services themselves.</p> |
| |
| <p>The classes directory holds any class or property files that are |
| needed by Axis2 itself, such as log4j.properties. Any actual |
| services to be handled by the system reside in the services |
| directory in the form of an axis archive, or *.aar file. This file |
| contains any classes related to the service, as well as the |
| services.xml file, which controls any additional requirements, such |
| as the definition of message senders and message receivers.</p> |
| |
| <p>The main file in all this is axis2.xml, which controls how the |
| application deals with received messages. It defines message |
| receivers and transport receivers, as well as defining transport |
| senders and determining which modules are active. It also defines |
| the order of phases, and the handlers to be executed within each |
| phase.</p> |
| |
| <p>You can control all of this information through the use of the |
| Web application, but if you restart the Axis2 application, these |
| changes are lost and the server goes back to the definitions in the |
| axis2.xml file.</p> |
| |
| <p>Axis2 also provides a third distribution, the <a href="../download.cgi"> |
| source distribution</a>, which enables you to generate this .war |
| file yourself.</p> |
| <a name="docs" id="docs"></a> |
| |
| <div class="section"> |
| <h2><a name="Axis2_Documentation_Distribution_Directory_Hierarchy"></a>Axis2 Documentation Distribution Directory Hierarchy</h2> |
| |
| <p>The Documents distribution includes all Axis2 documentation |
| including the xdcos and javadocs. It has the following |
| structure:</p> |
| |
| <p><b>Code Listing 3: Axis2 Documents Distribution</b></p> |
| |
| <div> |
| <pre> |
| docs |
| javadocs |
| xdocs |
| |
| LICENSE.txt |
| README.txt |
| release-notes.html |
| </pre></div> |
| |
| <p>The javadocs directory includes all the standard <a href="../api/index.html">API documentation</a> for the Axis2 |
| API, with other documentation (like this document) in the xdocs |
| directory.</p> |
| <a name="clients" id="clients"></a> |
| |
| <div class="section"> |
| <h2><a name="Axis2_and_Clients"></a>Axis2 and Clients</h2> |
| |
| <p>Now that explains how Axis2 behaves as part of a Web |
| application. What about a standalone client that is not part of a |
| J2EE application? In that case, a sender can use the Axis2 default |
| properties, in other words, no special handlers, and so on. But you |
| also have the option to tell the client to load its own copy of the |
| axis2.xml file and behave accordingly.</p> |
| |
| <p><b>See Next Section</b> - <a href="userguide-installingtesting.html#installingtesting">Installing and |
| Testing Client Code</a></p> |
| |
| </html> |
| </div> |
| </div> |
| </div> |
| |
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| <div class="row-fluid"> |
| <p >Copyright © 2004–2016 |
| <a href="http://www.apache.org/">The Apache Software Foundation</a>. |
| All rights reserved. |
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