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Posted to java-dev@axis.apache.org by aj...@apache.org on 2005/09/23 16:32:16 UTC
svn commit: r291127 [2/2] -
/webservices/axis2/trunk/java/xdocs/userguide.html
Modified: webservices/axis2/trunk/java/xdocs/userguide.html
URL: http://svn.apache.org/viewcvs/webservices/axis2/trunk/java/xdocs/userguide.html?rev=291127&r1=291126&r2=291127&view=diff
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--- webservices/axis2/trunk/java/xdocs/userguide.html (original)
+++ webservices/axis2/trunk/java/xdocs/userguide.html Fri Sep 23 07:32:09 2005
@@ -1,1378 +1,1378 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
-<html>
-<head>
- <meta http-equiv="content-type" content="text/html; charset=windows-1252">
- <title>Axis 2.0 User's Guide</title>
- <meta name="CREATED" content="20050918;20224042">
- <meta name="CHANGEDBY" content="Chamikara Jayalath">
- <meta name="CHANGED" content="20050919;1140420">
-</head>
-
-<body lang="en-US" dir="ltr">
-<h1 align="center"><a name="_Toc96697849"></a>Axis 2.0 User's Guide</h1>
-
-<h2>Contents</h2>
-<ul>
- <li><p><a href="#Introduction">Introduction</a></p>
- </li>
- <li><p><a href="#What_is_Axis_2_0__">What is Axis 2.0 ?</a></p>
- </li>
- <li><p><a href="#Web_Services_Using_Axis2">Web Services Using Axis2</a></p>
- </li>
- <li><p><a href="#Web_Service_Clients_Using_Axis2">Web Service Clients Using Axis2</a></p>
- </li>
- <li><p><a href="#Modules">Modules</a></p>
- </li>
- <li><p><a href="#Other_Samples">Other Samples</a></p>
- </li>
- <li><p><a href="#Tools">Tools</a></p>
- </li>
- <li><p><a href="#Advanced_Topics">Advanced Topics</a></p>
- </li>
-</ul>
-
-<p><br>
-<br>
-</p>
-
-<h2><a name="_Toc96698076"></a><a name="Introduction"></a>Introduction</h2>
-
-<p>Welcome to Axis 2.0, the next generation of Apache Axis !!! This User
-Guide will help you to understand what you will get from Axis 2.0 and how to
-get started. We hope you will benefit from the power of Axis 2.0.</p>
-
-<h2>Attention</h2>
-<ul>
- <li><p style="margin-bottom: 0in">This User Guide is written based on the
- Axis2 binary distribution, the Binary distribution can be created from
- the source distribution using the maven goal <code>$maven
- dist-bin</code></p>
- </li>
- <li><p>Before we start, its highly recommended to read <a
- href="http://ws.apache.org/axis/java/user-guide.html">Axis 1.x User's
- guide </a>, if you are new to Axis.</p>
- </li>
-</ul>
-
-<h2><a name="_Toc96698077"></a><a name="What_is_Axis_2_0__"></a>What is Axis 2.0 ?</h2>
-
-<p>Axis 2.0 is the next generation of Apache Axis. In late August 2004,
-during the Axis Summit held in Colombo, Sri Lanka, a new architecture was
-introduced to have a much more flexible, efficient and configurable Axis.
-Even though the architecture is new, some of the well established concepts
-from Axis 1.x, like handlers are preserved in Axis 2.0 also. Axis 2.0 comes
-with lots of new features, enhancements and new industry specification
-implementations.</p>
-
-<p>After months of continued discussion and coding effort in this direction,
-Axis 2.0 now delivers the following key features:</p>
-<ul>
- <li><p style="margin-bottom: 0in"><strong>Speed</strong>. Axis uses its own
- object model and StAX (streaming) parsing to achieve significantly
- greater speed than earlier versions of Apache AXIS.</p>
- </li>
- <li><p style="margin-bottom: 0in"><strong>Low memory foot print</strong>.
- Axis 2.0 was designed ground-up keeping low memory foot print in mind.</p>
- </li>
- <li><p style="margin-bottom: 0in"><strong>AXIOM</strong>. Axis 2.0 comes
- with its own light-weight object model, AXIOM, for message processing
- which is extensible, high performance and developer convenient</p>
- </li>
- <li><p style="margin-bottom: 0in"><strong>Hot Deployment.</strong> One can
- now hot deploy web services and handlers.</p>
- </li>
- <li><p style="margin-bottom: 0in"><strong>Asynchronous Web
- Services</strong>. Axis 2.0 now support asynchronous web services
- invocation and asynchronous web services.</p>
- </li>
- <li><p style="margin-bottom: 0in"><strong>MEP Support. </strong>Axis 2.0
- now comes handy with support for Message Exchange Patterns.</p>
- </li>
- <li><p style="margin-bottom: 0in"><strong>Flexibility</strong>. The Axis
- architecture gives the developer complete freedom to insert extensions
- into the engine for custom header processing, system management, or
- anything else you can imagine.</p>
- </li>
- <li><p style="margin-bottom: 0in"><strong>Stability</strong>. Axis defines
- a set of published interfaces which change relatively slowly compared to
- the rest of Axis.</p>
- </li>
- <li><p style="margin-bottom: 0in"><strong>Component-oriented
- deployment</strong>. 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"><strong>Transport framework</strong>. We
- have a clean and simple abstraction for designing 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><strong>WSDL support.</strong> Axis 2.0 supports the <a
- href="http://www.w3.org/TR/wsdl">Web Service Description Language </a>,
- version 1.1 and 2.0, which allows you to easily build stubs to access
- remote services, and also to automatically export machine-readable
- descriptions of your deployed services from Axis.</p>
- </li>
-</ul>
-
-<p>We hope you enjoy using Axis. Please note that this is an open-source
-effort - if you feel the code could use some new features or fixes, please
-get involved and lend a hand! The Axis developer community welcomes your
-participation .</p>
-
-<p>Let us know what you think!</p>
-
-<p>Please send feedback about the package to " <a
-href="mailto:axis-user@ws.apache.org">axis-user@ws.apache.org </a>" and make
-sure to prefix the subject of the mail with [Axis2].</p>
-
-<h2><a name="_Toc96698078"></a>What's in this release?</h2>
-
-<p>This release includes the following features:</p>
-<ul>
- <li><p style="margin-bottom: 0in">AXIOM, a SOAP specific streaming XML
- infoset model for SOAP 1.1/1.2 Messages</p>
- </li>
- <li><p style="margin-bottom: 0in">Support for One-Way Messaging and Request
- Response Messaging</p>
- </li>
- <li><p style="margin-bottom: 0in">Modules, mechanism to extend the SOAP
- Processing Model</p>
- </li>
- <li><p style="margin-bottom: 0in">Archives based deployment Model</p>
- </li>
- <li><p style="margin-bottom: 0in">WSDL Code Generation Tool for Stub and
- skeletons</p>
- </li>
- <li><p style="margin-bottom: 0in">XML Beans based data binding support</p>
- </li>
- <li><p style="margin-bottom: 0in">Support for WS-Addressing, both the
- submission and final versions</p>
- </li>
- <li><p style="margin-bottom: 0in">Client API</p>
- </li>
- <li><p style="margin-bottom: 0in">REST Web Service Support</p>
- </li>
- <li><p style="margin-bottom: 0in">HTTP transport Support</p>
- </li>
- <li><p style="margin-bottom: 0in">SMTP transport Support</p>
- </li>
- <li><p style="margin-bottom: 0in">TCP transport Support</p>
- </li>
- <li><p style="margin-bottom: 0in">MTOM/SWA attachments support</p>
- </li>
- <li><p>SAAJ implementation</p>
- </li>
-</ul>
-
-<p>The release include following tools</p>
-<ol>
- <li><p style="margin-bottom: 0in">Admin Web App</p>
- </li>
- <li><p style="margin-bottom: 0in">WSDL2WS, eclipse Plugin/Command line
- version</p>
- </li>
- <li><p style="margin-bottom: 0in">Service Archive Wizard, eclipse Plugin</p>
- </li>
- <li><p>Module Archive Wizard, eclipse Plugin</p>
- </li>
-</ol>
-
-<h2><a name="_Toc96698079"></a>What's still to do?</h2>
-
-<p>Please see a list of what we think needs doing - and please consider
-helping out if you're interested & able!</p>
-<ul>
- <li><p style="margin-bottom: 0in">JAX-RPC 1.1 and/or JAX-WS compliance</p>
- </li>
- <li><p style="margin-bottom: 0in">Pluggable Data binding support</p>
- </li>
- <li><p style="margin-bottom: 0in">SOAP Encoding</p>
- </li>
- <li><p style="margin-bottom: 0in">Binary serialization and de-serialization
- support</p>
- </li>
- <li><p style="margin-bottom: 0in">Management Interface for Axis2</p>
- </li>
- <li><p style="margin-bottom: 0in">Complete XML infoset support for AXIOM</p>
- </li>
- <li><p style="margin-bottom: 0in">Implementation of other transports. e.g.
- JMS..</p>
- </li>
- <li><p>Web Service Policy Support</p>
- </li>
-</ul>
-
-<h2><a name="_Toc96697863"></a><!-- Image goes here -->
-<!--<h3><a name="_Toc96698087"></a>Running the Axis2 standalone server </h3>
-<p>Since a J2EE servlet container can be heavy in certain cases, a simple socket server is provided with Axis2. </p>
-Start scripts are inluded in the bin directory of the binary distribution.</p>
-<p>For windows</p>
-<p class="command">>start.bat </p>
-<p>For Linux</p>
-<p class="command">$start.sh</p>
-<p>This will start the simple axis server in the default port (8080). To start the server in a non default port
-the server script can be used. The sever script however needs two parameters, the repository location and the port.</p>
-
-<p>For windows</p>
-<p class="command">>server <i>repository directory</i> <i>port</i> </p>
-<p>For Linux</p>
-<p class="command">$server <i>repository directory</i> <i>port</i> </p>
-
-<p><b>
-Note - the directory entered as the repository location needs to have a services directory inside. This is
-absolutely required and AXIS will not create it automatically in the case of the simple axis server.
-</b></p> -->
-Samples</h2>
-
-<p>In this section of the user guide we will look at how to write and deploy
-Web Services and how to write Web Service Clients using Axis2. All the user
-guide samples are located at the <b><font
-color="#000000">"samples/userguide/src"</font></b> directory of the binary
-distribution. So.. let's explore the samples.</p>
-
-<p>Note: Please note that the rest of this user guide assumes that the user
-has downloaded the binary distribution of Axis2. If you have already
-downloaded the source tree of Axis2 then please create the binary
-distribution by simply using the maven command <strong>maven dist-bin
-</strong>This will create the "axis2-0.91-bin.zip" and "axis2-0.91-bin.tar"
-in the "target/dist" directory. Extract the zip or the tar ball to any
-directory in your machine and for the explanations purposes we will name this
-directory as "Axis2Home".</p>
-
-<h2><a name="Web_Services_Using_Axis2"></a>Web Services Using Axis2</h2>
-
-<p>Before starting, please check whether you have deployed the "axis2.war" in
-your servlet container and it is working properly. (See <a
-href="installationguide.html">Installation Guide</a>). User can select any of
-the following two ways of writing web services using Axis2. </p>
-<ul>
- <li><p style="margin-bottom: 0in">Use Axis2's primary interfaces and
- implement the business logic.</p>
- </li>
- <li><p>Start from the WSDL ->Code generate the Skeleton ->Implement
- the Business Logic.</p>
- </li>
-</ul>
-
-<h3>Write My Service using Axis2</h3>
-
-<h4>MyService</h4>
-
-<p>First let's see how we can write a simple Web Service (MyService) using
-Axis2's primary interfaces and deploy it. For this purpose we will create a
-Web Service with two operations as follows.</p>
-<pre>public void ping(OMElement element){} //IN-ONLY operation, just accepts the OMElement and do some processing.
-public OMElement echo(OMElement element){}//IN-OUT operation, accepts an OMElement and
- //responds with another OMElement after processing.</pre>
-
-<p>Complete code for this example Web Service (MyService) can be found in the
-"Axis2Home/samples/userguide/src" directory under "userguide/example1"
-package. As you can see, the two operations are very simple and need no
-explanations on what they are doing. So let's see how we can write the
-deployment descriptors for the service and deploy it.</p>
-
-<h4>How to write the Web Service?</h4>
-
-<p>Write a new Web Service with Axis2 involve four steps</p>
-<ol>
- <li><p style="margin-bottom: 0in">Write the Implementation Class</p>
- </li>
- <li><p style="margin-bottom: 0in">Write a services.xml file to explain the
- Web Service</p>
- </li>
- <li><p style="margin-bottom: 0in">create a *.aar archive for the Web
- Service</p>
- </li>
- <li><p>Deploy the Web Service</p>
- </li>
-</ol>
-
-<h4>Step1 :Write the Implementation Class</h4>
-
-<p>Provides a implementation class that provide the business logic for the
-Web Service, it should have methods that match the operations in the Web
-Service. Unless you have data binding the signature of the methods can have
-one parameter of type OMElement.</p>
-<pre>public class MyService{
- public void ping(OMElement element){
- ......
- }
- public OMElement echo(OMElement element){
- ......
- }
-}</pre>
-
-<h4>Step2 :Write the services.xml file</h4>
-
-<p>Axis2 uses "services.xml" to keep configurations for a Web Service. Each
-Web Service deployed in Axis2 needs a "services.xml" containing the
-configurations. "services.xml" for MyService will be as follows; we will see
-what each parameter means later.</p>
-<pre><service name="MyService">
- <description>
- This is a sample Web Service with two operations, echo and ping.
- </description>
- <parameter name="ServiceClass" locked="xsd:false">userguide.example1.MyService</parameter>
- <operation name="echo">
- <messageReceiver class="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>
- </operation>
- <operation name="ping">
- <messageReceiver class="org.apache.axis2.receivers.RawXMLINOnlyMessageReceiver"/>
- </operation>
- </service></pre>
-
-<p>As it can be seen, first line of the "services.xml" gives the name of the
-Web Service. This is used in the URL to the service as the service name. Next
-comes the description and the service class. The next two xml tags describe
-the operations that are available in this service with respective message
-receivers. For the "echo" operation we have used a
-<strong>RawXMLINOutMessageReceiver</strong> since it is an IN-OUT operation.
-For IN-ONLY operation, "ping" we have used
-<strong>RawXMLINOnlyMessageReceiver</strong> as the message receiver.</p>
-
-<p>You can write a services.xml file to include a group of services instead
-of a single service. This makes management and deployment of a set of related
-services very easy. At runtime you can share information between these
-services within a single interaction, using the ServiceGroupContext. If you
-hope to use this functionality the services.xml file should have following
-format.</p>
-<pre><serviceGroup>
- <service name="Service1">
- <!-- details for Service1 -->
- </service>
- <service name="Service2">
- <!-- details for Service2 -->
- </service>
- <module ref="ModuleName" />
- <parameter name="serviceGroupParam1" locked="xsd:false">value 1</parameter>
-</serviceGroup></pre>
-
-<h4>Step3 :Create the Web Service Archive</h4>
-
-<p>Axis2 use ".aar" (Axis Archive) file as the deployment package for Web
-Services. So, for MyService we will use "MyService.aar" with the
-"services.xml" packaged in the META-INF as shown in the following picture.</p>
-
-<p><img src="images/userguide/ServiceItems.jpg" name="Graphic1"
-align="bottom" width="176" height="91" border="0"></p>
-
-<p>To create "MyService.aar" user can first create a jar file containing all
-the files necessary for the service and then rename the "jar" to "aar" so
-that Axis2 understands it as a service archive. This has already been created
-in the "Axis2Home/samples/userguide" directory, and let's use it..</p>
-
-<h4>Step4 :Depoly the Web Service</h4>
-
-<p>Deploying the service is just a matter of dropping the ".aar" in to
-"services" directory that can be found in the "\webapps\axis2\WEB-INF" of
-your servlet container and hence please copy the "MyService.aar" into the
-"<b>services</b>" directory. Once these steps are completed, please start the
-servlet container (if you have not already started) and check the link "List
-Available services" in the page http://localhost:8080/axis2/index.jsp and see
-whether the MyService is deployed properly. If everything is ok, you will see
-the following out put..</p>
-
-<p align="center"><img src="images/userguide/MyServiceDeployed.jpg"
-name="Graphic2" align="bottom" width="734" height="766" border="0"></p>
-
-<p>If you can see the above output then you have successfully deployed
-MyService on Axis2. Now let's see how we can write Web Service client to use
-this services. Axis2 provides an easy way to deploy a Web Services using,
-index.jsp. (See the installation guide for more information on this)</p>
-
-<h3>Axis2SampleDocLitPortType</h3>
-
-<p>Now let's see how we can generate the skeleton from a given WSDL and
-implement the business logic using Axis2. For this we use
-Axis2SampleDocLit.wsdl that can be found in the <b>wsdl</b> directory under
-samples.</p>
-
-<h4>Generating Skeleton</h4>
-
-<p>To generate the skeleton and the required classes you can use the
-WSDL2Java tool provided in Axis2. This tool is located in the bin directory
-of the distribution and can be executed using the provided scripts (.bat or
-.sh). The tool's parameter list is as follows and user can specify these
-values depending on their requirements.</p>
-<pre>Usage WSDL2Code -uri :WSDL file location
--o : output file location
--a : Generate async style code only. Default if off
--s : Generate sync style code only. Default if off. takes precedence over -a
--p : set custom package name
--l : valid languages are java and csharp. Default is java
--t : Generate TestCase to test the generated code
--ss : Generate server side code (i.e. skeletons).Default is off
--sd : Generate service descriptor (i.e. axis2.xml).Default is off.Valid with -ss</pre>
-
-<p>We will use the tool with the following parameters and generate the
-skeleton and the other required classes.</p>
-<pre style="margin-bottom: 0.2in">WSDL2Java -uri ..\samples\wsdl\Axis2SampleDocLit.wsdl -ss -sd -o ..\samples\src -p org.apache.axis2.userguide</pre>
-
-<p>This will generate the required classes in the <b>src</b> directory inside
-samples. This will also generate the schema classes in a directory named
-<b>schema</b> and please note that these are not source files and should be
-availed in the class path in order to compile the generated classes</p>
-
-<h4>Implement the Business Logic</h4>
-
-<p>Locate the skeleton class that can be found under src/userguide directory
-with the name "Axis2SampleDocLitPortTypeSkeleton.java". This is the skeleton
-for our web service and we can easily fill the business logic now. The WSDL
-we have used has four operations as follows.</p>
-<ul>
- <li><p style="margin-bottom: 0in">echoVoid - Operation that does not
- accept any input parameters and also provide no out put parameters. Just
- perform some task </p>
- </li>
- <li><p style="margin-bottom: 0in">echoString - Operation that echos a
- String value </p>
- </li>
- <li><p style="margin-bottom: 0in">echoStringArray - Operation that accept
- string array as the input and echos them back</p>
- </li>
- <li><p>echoStruct - Operation that accept a Struct as the input and echos
- them back.</p>
- </li>
-</ul>
-
-<h4>echoVoid </h4>
-
-<p>Locate the following code segment in the
-"Axis2SampleDocLitPortTypeSkeleton.java" and fill the business logic. For
-the explanation purpose we do not need anything to be implemented here.</p>
-<pre>public void echoVoid(){
- //Todo fill this with the necessary business logic
-}</pre>
-
-<h4>echoString </h4>
-
-<p>Locate the following code segment in the
-"Axis2SampleDocLitPortTypeSkeleton.java" and fill the business logic as
-shown below.</p>
-<pre> public org.soapinterop.xsd.EchoStringArrayReturnDocument
- echoStringArray(org.soapinterop.xsd.EchoStringArrayParamDocument param2){
- //Todo fill this with the necessary business logic
- return null;
- }</pre>
-
-<p>Once filled with the business logic it will be as follows. The code is
-simple and the explanations are given in the comments.</p>
-<pre>public org.soapinterop.xsd.EchoStringReturnDocument
- echoString(org.soapinterop.xsd.EchoStringParamDocument param6) {
- //Use the factory to create the output document.
- EchoStringReturnDocument retDoc = EchoStringReturnDocument.Factory.newInstance();
- //send the string back.
- retDoc.setEchoStringReturn(param6.getEchoStringParam());
- return retDoc;
-}</pre>
-
-<p>Similarly following code fragments shows how you can fill the business
-logic for our first web service.</p>
-
-<h4>echoStringArray</h4>
-<pre>public org.soapinterop.xsd.EchoStringArrayReturnDocument
- echoStringArray(org.soapinterop.xsd.EchoStringArrayParamDocument param2) {
-
- //Use the factory to create the output document.
- EchoStringArrayReturnDocument retDoc = EchoStringArrayReturnDocument.Factory.newInstance();
-
- //Get the String array from the input parameters.
- String[] inParams = param2.getEchoStringArrayParam().getStringArray();
- ArrayOfstringLiteral retParams = ArrayOfstringLiteral.Factory.newInstance();
- //Set the input parameters to the output parameters for echoing.
- for (int i = 0; i < inParams.length; i++) {
- retParams.addString(inParams[i]);
- }
-
- //return the output document.
- retDoc.setEchoStringArrayReturn(retParams);
- return retDoc;
-}</pre>
-
-<h4>echoStruct</h4>
-<pre>public org.soapinterop.xsd.EchoStructReturnDocument
- echoStruct(org.soapinterop.xsd.EchoStructParamDocument param4) {
-
- //Use the factory to create the output document.
- EchoStructReturnDocument retDoc = EchoStructReturnDocument.Factory.newInstance();
-
- //Get the SOAPStrcut from the incoming parameters
- SOAPStruct inStruct = param4.getEchoStructParam();
-
- //Struct for the sending back
- SOAPStruct outStruct = SOAPStruct.Factory.newInstance();
-
- //Fill the outgoing struct
- outStruct.setVarFloat(inStruct.getVarFloat());
- outStruct.setVarInt(inStruct.getVarInt());
- outStruct.setVarString(inStruct.getVarString());
- //Set the outgoing document.
- retDoc.setEchoStructReturn(outStruct);
-
- return retDoc;
-}</pre>
-
-<h4>services.xml</h4>
-
-<p> Axis2 uses "services.xml" to hold the configuretions for a particular web
-service deployed in the Axis2 engine. When we generate the skeleton using the
-WSDL2Java tool, it will also generate the required services.xml for this web
-service as well and it can be found in the same directory as the skeleton.
-The generated services.xml is as follows.</p>
-<pre><!--Auto generated Axis Service XML-->
-<service name="Axis2SampleDocLitPortTypeSkeletonTest">
-<parameter locked="xsd:false" name="ServiceClass">userguide.Axis2SampleDocLitPortTypeSkeleton</parameter>
-<!--Mounting the method echoVoid-->
-<operation name="echoVoid">
-<messageReceiver class="userguide.Axis2SampleDocLitPortTypeMessageReceiver"/>
-</operation>
-<!--Mounting the method echoStringArray-->
-<operation name="echoStringArray">
-<messageReceiver class="userguide.Axis2SampleDocLitPortTypeMessageReceiver"/>
-</operation>
-<!--Mounting the method echoStruct-->
-<operation name="echoStruct">
-<messageReceiver class="userguide.Axis2SampleDocLitPortTypeMessageReceiver"/>
-</operation>
-<!--Mounting the method echoString-->
-<operation name="echoString">
-<messageReceiver class="userguide.Axis2SampleDocLitPortTypeMessageReceiver"/>
-</operation>
-</service></pre>
-
-<p>As it can be seen, first line of the "services.xml" gives the name of the
-Web Service. This is used in the URL to the service as the service name. Next
-comes the description and the service class. The next xml tags describe the
-operations that are available in this service with respective message
-receivers.</p>
-
-<h4>Packaging</h4>
-
-<p>Next step in the process is to package the classes in a .aar (axis2
-archive) and deploy it in Axis2. When the WSDL2Java tool generate the
-skeleton it will also generate the required data binding classes as well.
-These schema related classes are located in the <b>schema </b>directory of
-the generated code. Copy this to your class path and compile the skeleton and
-the supporting classes. In order to create the .aar file, let's create the
-following directory structure with the required files and then simply use jar
-command to package it.</p>
-
-<p><img src="images/userguide/DirectoryStructure.JPG" name="Graphic3"
-align="bottom" width="164" height="142" border="0"></p>
-
-<p>Go to the top level directory where you can find the class files for the
-above service (i.e. one level up in the directory structure shown above) and
-type the following command in a command line.</p>
-<pre style="margin-bottom: 0.2in">jar -cf echo.aar .</pre>
-
-<p>Deploying the service is just a matter of dropping the ".aar" in to
-"services" directory that can be found in the "\webapps\axis2\WEB-INF" of
-your servlet container and hence please copy the "echo.aar" into the
-"<b>services</b>" directory. Once these steps are completed, please start the
-servlet container (if you have not already started) and check the link "List
-Available services" in the page http://localhost:8080/axis2/index.jsp and see
-whether the Axis2SampleDocLitPortType is deployed properly. If everything is
-ok, you will see the following out put..</p>
-
-<p align="center"><img src="images/userguide/ServiceDeployed.JPG"
-name="Graphic4" align="bottom" width="734" height="764" border="0"></p>
-
-<p>If you can see the above output then you have successfully deployed
-Axis2SampleDocLitPortType on Axis2. Now let's see how we can write Web
-Service client to use this services. Axis2 provides an easy way to deploy a
-Web Services using, index.jsp. (See the installation guide for more
-information on this)</p>
-
-<h2><a name="Web_Service_Clients_Using_Axis2"></a>Web Service Clients Using Axis2</h2>
-
-<p>Web services can be used to provide wide range of functionality to the
-users ranging from simple less time consuming operations such as
-"getStockQuote" to time consuming business services. When we utilize (invoke
-using client applications) these Web Service we cannot use some simple
-generic invocation paradigm that suites all the timing complexities involved
-in the service operations. For example, if we use a single transport channel
-(such as HTTP) to invoke a Web Service with and IN-OUT operation, that take
-long time to complete, then in most of the time we may end up with
-"connection time outs". On the other hand, if there are simultaneous service
-invocations that we need to perform from a single client application, then
-the use of a "blocking" client API will degrade the performance of the client
-application. Similarly there are various other consequences such as One-Way
-transports that come in to play when we need 's try<< to analyze some
-common service invocation paradigms.</p>
-
-<p>Many web service engines provide the users with a Blocking and
-Non-Blocking client APIs.</p>
-<ul>
- <li><p style="margin-bottom: 0in"><b>Blocking API</b> -Once the service
- invocation is called, the client application hangs and gets the control
- back only when the operation completes and the client receives a response
- or a fault. This is the simplest way of invoking Web Services and suites
- many business situations.</p>
- </li>
- <li><p><b>Non-Blocking API </b>- A callback or polling based API and hence
- once a service invocation is called, the client application immediately
- gets the control back and the response is retrieved using the callback
- object provided. This approach provides the flexibility to the client
- application to invoke several Web Services simultaneously with out
- blocking on the operation already invoked.</p>
- </li>
-</ul>
-
-<p>Both these mechanism works in the API level and let's name the
-asynchronous behavior that we can get using the Non-Blocking API as <b>API
-Level Asynchrony.</b></p>
-
-<p>Both these mechanisms use single transport connection to send the request
-and to receive the response. They severely lags the capability of using two
-transport connections for the request and the response (either One-Way of
-Two-Way). So both of these mechanisms fail to address the problem of long
-running transactions (the transport connection may times-out before the
-operation completes). A possible solution would be to use two separate
-transport connections for request and response. The asynchronous behavior
-that we gain using can be called, <b>Transport Level Asynchrony</b>.</p>
-
-<p>By combining the two we can obtain four different invocation patterns for
-web services as shown in the following table.</p>
-<a name="table1"></a>
-
-<table width="100%" border="1" cellpadding="0" cellspacing="0">
- <tbody>
- <tr>
- <td width="33%" height="19"><p>API (Blocking/Non-Blocking)</p>
- </td>
- <td width="33%"><p> Dual Transports (Yes/No)</p>
- </td>
- <td width="33%"><p>Description</p>
- </td>
- </tr>
- <tr>
- <td width="33%" height="19"><p>Blocking</p>
- </td>
- <td width="33%"><p>No</p>
- </td>
- <td width="33%"><p>Simplest and the familiar invocation pattern</p>
- </td>
- </tr>
- <tr>
- <td width="33%" height="19"><p>Non-Blocking</p>
- </td>
- <td width="33%"><p>No</p>
- </td>
- <td width="33%"><p>Using callbacks or polling</p>
- </td>
- </tr>
- <tr>
- <td width="33%" height="19"><p>Blocking</p>
- </td>
- <td width="33%"><p>Yes</p>
- </td>
- <td width="33%"><p>This is useful when the service operation is IN-OUT
- in nature but the transport used is One-Way (e.g. SMTP)</p>
- </td>
- </tr>
- <tr>
- <td width="33%" height="19"><p>Non-Blocking</p>
- </td>
- <td width="33%"><p>Yes</p>
- </td>
- <td width="33%"><p>This is can be used to gain the maximum asynchronous
- behavior. No blocking in the API level and also in the transport
- level</p>
- </td>
- </tr>
- </tbody>
-</table>
-
-<p>Axis2 provides the user with all these possibilities to invoke Web
-Services. In addition Axis2 provides a data binding support making the life
-easy for developers writing Web Service client applications. In this user
-guide we will first see how we can write Web Service clients using the
-Axis2's primary APIs and later we will see how we can use generated stubs to
-simply write Web Service Clients.</p>
-
-<h3>Using Axis2's Primary APIs</h3>
-
-<h3>EchoBlockingClient</h3>
-
-<p>Axis2 provides the user with several invocation patterns for Web Services,
-ranging from pure blocking single channel invocations to a non-blocking dual
-channel invocations. First let's see how we can write a client to invoke
-"echo" operation of "MyService" using the simplest good old blocking
-invocation. The client code that you need to write will be as follows.</p>
-<pre> try {
- OMElement payload = ClientUtil.getEchoOMElement();
- <font color="#33cc00">Call call = new Call();</font>
-<font color="#33cc00"> call.setTo(targetEPR);</font>
-<font color="#33cc00"> call.setTransportInfo(Constants.TRANSPORT_HTTP, Constants.TRANSPORT_HTTP, false);</font>
-
-<font color="#33cc00"> OMElement result = (OMElement) call.invokeBlocking("echo", payload);</font>
-
- StringWriter writer = new StringWriter();
- result.serializeWithCache(new OMOutput(XMLOutputFactory.newInstance().createXMLStreamWriter(writer)));
- writer.flush();
-
- System.out.println(writer.toString());
-
- } catch (AxisFault axisFault) {
- axisFault.printStackTrace();
- } catch (XMLStreamException e) {
- e.printStackTrace();
- }
-}</pre>
-
-<p>The green lines shows the set of operations that you need to perform
-in-order to invoke a web service while the rest is used to create the
-OMElement that needs to be sent and to display the response OMElement. To
-test this client you can use the provided ant build file that can be found in
-the "Axis2Home/samples" directory. Run the "testEchoBlockingClient" target .
-if you can see the response OMElement printed in your command line then you
-have successfully tested the client as well. </p>
-
-<h3>PingClient</h3>
-
-<p>In the Web Service "MyService" we had a IN-ONLY operation with the name
-"ping" (see Web Services Using Axis2). So let's write a client to invoke this
-operation as well. The client code will be as follows.</p>
-<pre> try {
- OMElement payload = ClientUtil.getPingOMElement();
-
- MessageSender msgSender = new MessageSender();
- msgSender.setTo(targetEPR);
- msgSender.setSenderTransport(Constants.TRANSPORT_HTTP);
- msgSender.send("ping", payload);
-
- } catch (AxisFault axisFault) {
- axisFault.printStackTrace();
- }</pre>
-
-<p>Since we are accessing a IN-ONLY operation we can directly use the
-"MessageSender" to invoke this operation. As it can be seen in the above code
-, it is very straight forward to invoke this type of operation. MessageSender
-will not block the invocation, hence it will return the control immediately
-back to the client. You can test this client by running the target
-"testPingClient" of the ant build file at "Axis2Home/samples".</p>
-
-<p>Ok, we have invoked the two operations in our service, Are we done? No!,
-there are lot more to explore, Let's see some other ways to invoke the same
-operations.</p>
-
-<h3>EchoNonBlockingClient</h3>
-
-<p>In the EchoBlockingClient once the "call.invokeBlocking("echo", payload);"
-is called, the client is blocked till the operation is completed. This
-behavior is not desirable when there are many Web Service invocations to be
-done in a single client application. A solution, would be to use a
-Non-Blocking API to invoke web services. Axis2 provides a callback based
-non-blocking API for users.</p>
-
-<p>A sample client for this can be found under
-"Axis2Home/samples/userguide/src/userguide/clients" with the name
-EchoNonBlockingClient. If we consider the changes that the user may have to
-do with respect to the "EchoBlockingClient" that we have already seen, it
-will be as follows.</p>
-<pre style="margin-bottom: 0.2in">call.invokeNonBlocking("echo", payload, callback);</pre>
-
-<p>The invocation accepts a callback object as a parameter. Axis2 client API
-provides an abstract Callback with the following methods.</p>
-<pre>public abstract void onComplete(AsyncResult result);
-public abstract void reportError(Exception e);
-public boolean isComplete() {}</pre>
-
-<p>The user is expected to implement the "onComplete " and "reportError "
-methods of their extended call back class. Axis2 engine calls the onComplete
-method once the Web Service response is received by the Axis2 Client API
-(Call). This will eliminate the blocking nature of the Web Service
-invocations and provides the user with the flexibility to use Non Blocking
-API for Web Service Clients.</p>
-
-<p>To run the sample client ( EchoNonBlockingClient) you can simply use the
-"testEchoNonBlockingClient" target of the ant file found at the
-"Axis2Home/samples" directory.</p>
-
-<h3>EchoNonBlockingDualClient</h3>
-
-<p>The solution provided by the Non-Blocking API has one limitation when it
-comes to Web Service invocations which takes long time to complete. The
-limitation is due to the use of single transport connection to invoke the Web
-Service and to retrieve the response. In other words, client API provides a
-non blocking invocation mechanism for the users, but the request and the
-response comes in a single transport connection (needs two way transports
-like HTTP). Long running Web Service invocations or Web Service invocations
-using One-Way transports (like SMTP) cannot be utilized by simply using a non
-blocking invocation. </p>
-
-<p>The trivial solution is to use separate transport connections (either
-One-Way or Two-Way) for the request and response. The next problem that needs
-to be solved is the correlation (correlating the request and the response).
-<a href="http://www.w3.org/Submission/ws-addressing/">WS-Addressing</a>
-provides a neat solution to above using <wsa:MessageID> and
-<wsa:RelatesTo> headers. Axis2 provides support for addressing based
-correlation mechanism and a complying Client API to invoke Web Services with
-two transport connections. (core of Axis2 does not depend on WS-Addressing,
-and it is the addressing like properties, hence Axis2 has the flexibility to
-use different versions of addressing)</p>
-
-<p>Users can select between Blocking or Non-Blocking APIs for the Web Service
-clients with two transport connections. By simply using a boolean flag, the
-same API can be used to invoke web services (IN-OUT operations) using two
-separate transport connections. Let's see how we can do it using an example.
-Following code fragment shows how to invoke the same "echo" operation, using
-Non-Blocking API with two transport connections<strong>. The ultimate
-asynchrony!!</strong></p>
-<pre> try {
- OMElement payload = ClientUtil.getEchoOMElement();
-
- Call call = new Call();
- call.setTo(targetEPR);
-
- //The boolean flag informs the axis2 engine to use two separate transport connection
- //to retrieve the response.
- <font color="#33cc00">call.engageModule(new QName(Constants.MODULE_ADDRESSING));</font>
- call.setTransportInfo(Constants.TRANSPORT_HTTP, Constants.TRANSPORT_HTTP, <font color="#00cc00">true</font>);
-
- //Callback to handle the response
- Callback callback = new Callback() {
- public void onComplete(AsyncResult result) {
- try {
- StringWriter writer = new StringWriter();
- result.serializeWithCache(new OMOutput(XMLOutputFactory.newInstance()
- .createXMLStreamWriter(writer)));
- writer.flush();
-
- System.out.println(writer.toString());
-
- } catch (XMLStreamException e) {
- reportError(e);
- }
- }
-
- public void reportError(Exception e) {
- e.printStackTrace();
- }
- };
-
- //Non-Blocking Invocation
- call.invokeNonBlocking("echo", payload, callback);
-
- //Wait till the callback receives the response.
- while (!callback.isComplete()) {
- Thread.sleep(1000);
- }
- <font color="#33cc00">call.close();</font>
-
- } catch (AxisFault axisFault) {
- axisFault.printStackTrace();
- } catch (Exception ex) {
- ex.printStackTrace();
- }</pre>
-
-<p>The three changes that we need do to the EchoNonBlockingClient are shown
-in the "green" color. Since our correlation mechanism is based on addressing
-we need to first "<strong>engage</strong>" the addressing module.<font
-color="#0000ff"> <font color="#000000"><b>"call.engageModule(new
-QName(Constants.MODULE_ADDRESSING));" </b>informs the Axis2 engine to engage
-the addressing module at the client side. The boolean flag (value true) in
-the "<br>
-<b>call.setTransportInfo(...)</b>" method informs the Axis2 engine to use
-separate transport connections for request and response. Finally
-"<b>call.close()</b>" informs the Axis2 engine to stop the client side
-listener started to retrieve the response.</font></font></p>
-
-<p>Before we run the sample client we need one more step to perform. As
-mentioned earlier Axis2 uses addressing based correlation mechanism and hence
-we need to "engage" addressing module in the server side as well. According
-to the Axis2 architecture addressing module is deployed in the
-"<strong>pre-dispatch</strong>" phase (See <a
-href="file:///G:/Documents and Settings/Jaliya/Desktop/Axis2ArchitectureGuide.html">Architecture
-Guide</a> for more details about phases) and hence "engaging" means simply
-adding module reference in the "axis2.xml" (NOT the "services.xml"). Please
-add the following line to the "axis2.xml" that you can find in the
-"/webapps/axis2/WEB-INF" directory in the servlet container. </p>
-<pre style="margin-bottom: 0.2in"> <module ref="addressing"/></pre>
-
-<p>Note: Please note that<font color="#000000"> once you change the
-"axis2.xml" you need to restart the servlet container.</font></p>
-
-<p>This will enable the addressing in the server side and now you can test
-the "TestEchoNonBlockingDualClient" using the "testEchoNonBlockingDualClient"
-target of the ant file found at "Axis2Home/samples" directory. If you can see
-the response OMElement printed in the client side, that means you have
-successfully tested the Non Blocking API with two transport channels at the
-client side.</p>
-
-<h3>EchoBlockingDualClient</h3>
-
-<p>This is again a two transport request/response client, but this time, we
-use a Blocking API in the client code. Sample code for this can be found in
-the "Axis2Home/samples/userguide/src/userguide/clients/" directory and the
-explanation is similar to the EchoNonBlockingDualClient, except that here we
-do not use a callback object to handle response. This is a very useful
-mechanism when the service invocation is IN-OUT in nature and the transports
-are One-Way (e.g. SMTP). For the sample client we use two HTTP connections
-for request and response. User can test this client using the
-"echoBlockingDualClient" target of the ant build file found in the
-"Axis2Home/samples" directory.</p>
-
-<p>See <a href="#configTransport">Configuring Transports</a> for use
-different transports.</p>
-
-<h3>With Data Binding</h3>
-
-<p>Axis2 provides the data binding support for Web Service client as well.
-The user can generate the required stubs from a given WSDL with the other
-supporting classes. Let's see how we can generate the stubs for the WSDL we
-have used earlier to generate the skeleton for the
-"Axis2SampleDocLitPortType". Simply run the WSDL2Java tool that can be found
-in the bin directory of the Axis2 distribution using the following
-command.</p>
-<pre style="margin-bottom: 0.2in">WSDL2Java -uri ..\samples\wsdl\Axis2SampleDocLit.wsdl -o ..\samples\src -p org.apache.axis2.userguide</pre>
-
-<p>This will generate the required stub "Axis2SampleDocLitPortTypeStub.java"
-that can be used to invoke the Web Service Axis2SampleDocLitPortType. Let's
-see how we can use this stub to write Web Service clients to utilize the Web
-Service Axis2SampleDocLitPortType (the service that we have already
-deployed).</p>
-
-<h3>Client for echoVoid Operation</h3>
-
-<p>Following code fragment shows the necessary code for utilizing the
-echoVoid operation of the Axis2SampleDocLitPortType that we have already
-deployed. In this operation, a blank SOAP body element is sent to the Web
-Service and the same SOAP envelope is echoed back.</p>
-<pre> try {
- //Create the stub by passing the AXIS_HOME and target EPR.
- //We pass null to the AXIS_HOME and hence the stub will use the current directory sa the AXIS_HOME
- Axis2SampleDocLitPortTypeStub stub = new Axis2SampleDocLitPortTypeStub(null,
- "http://localhost:8080/axis2/services/Axis2SampleDocLitPortType");
- stub.echoVoid();
-
-} catch (Exception e) {
- e.printStackTrace();
-}</pre>
-
-<h3>Client for echoString Operation</h3>
-
-<p>Following code fragment shows the necessary code for utilizing the
-echoString operation of the Axis2SampleDocLitPortType that we have already
-deployed. The code is very simple to understand and the explanations are
-given in the comments.</p>
-<pre>try {
- //Create the stub by passing the AXIS_HOME and target EPR.
- //We pass null to the AXIS_HOME and hence the stub will use the current directory sa the AXIS_HOME
- Axis2SampleDocLitPortTypeStub stub= new Axis2SampleDocLitPortTypeStub(null,
- "http://localhost:8080/axis2/services/Axis2SampleDocLitPortType");
- //Create the request document to be sent.
- EchoStringParamDocument reqDoc= EchoStringParamDocument.Factory.newInstance();
- reqDoc.setEchoStringParam("Axis2 Echo");
- //invokes the web service.
- EchoStringReturnDocument resDoc=stub.echoString(reqDoc);
- System.out.println(resDoc.getEchoStringReturn());
-
- } catch (Exception e) {
- e.printStackTrace();
- }</pre>
-
-<p>Similarly following code fragments shows client side code for
-echoStringArray operation and echoStruct operation respectively.</p>
-
-<h3>Client for echoStringArray Operation</h3>
-<pre>try {
- //Create the stub by passing the AXIS_HOME and target EPR.
- //We pass null to the AXIS_HOME and hence the stub will use the current directory sa the AXIS_HOME
- Axis2SampleDocLitPortTypeStub stub = new Axis2SampleDocLitPortTypeStub(null,
- "http://localhost:8080/axis2/services/Axis2SampleDocLitPortType");
-
- //Create the request document to be sent.
- EchoStringArrayParamDocument reqDoc = EchoStringArrayParamDocument.Factory.newInstance();
- ArrayOfstringLiteral paramArray = ArrayOfstringLiteral.Factory.newInstance();
-
- paramArray.addString("Axis2");
- paramArray.addString("Echo");
-
- reqDoc.setEchoStringArrayParam(paramArray);
- EchoStringArrayReturnDocument resDoc = stub.echoStringArray(reqDoc);
-
- //Get the response params
- String[] resParams = resDoc.getEchoStringArrayReturn().getStringArray();
-
- for (int i = 0; i < resParams.length; i++) {
- System.out.println(resParams[i]);
- }
- } catch (Exception e) {
- e.printStackTrace();
- }</pre>
-
-<h3>Client for echoStruct Operation</h3>
-<pre>try {
- //Create the stub by passing the AXIS_HOME and target EPR.
- //We pass null to the AXIS_HOME and hence the stub will use the current directory sa the AXIS_HOME
- Axis2SampleDocLitPortTypeStub stub = new Axis2SampleDocLitPortTypeStub(null,
- "http://localhost:8080/axis2/services/Axis2SampleDocLitPortType");
- //Create the request Document
- EchoStructParamDocument reqDoc = EchoStructParamDocument.Factory.newInstance();
-
- //Create the complex type
- SOAPStruct reqStruct = SOAPStruct.Factory.newInstance();
-
- reqStruct.setVarFloat(100.50F);
- reqStruct.setVarInt(10);
- reqStruct.setVarString("High");
-
- reqDoc.setEchoStructParam(reqStruct);
-
- //Service invocation
- EchoStructReturnDocument resDoc = stub.echoStruct(reqDoc);
- SOAPStruct resStruct = resDoc.getEchoStructReturn();
-
- System.out.println("floot Value :" + resStruct.getVarFloat());
- System.out.println("int Value :" + resStruct.getVarInt());
- System.out.println("String Value :" + resStruct.getVarString());
-
-} catch (Exception e) {
- e.printStackTrace();
-}</pre>
-
-<h2><a name="Modules"></a>Modules</h2>
-
-<p>Axis2 provides an extended support for modules (See <a
-href="file:///G:/Documents and Settings/Jaliya/Desktop/Axis2ArchitectureGuide.html">Architecture
-Guide</a> for more details about modules in axis2). Let's see how we can
-create a custom module and deploy it to the MyService that we have created
-earlier. Following steps shows the actions that needs to be performed to
-deploy a custom module for a given Web Service.</p>
-<ol>
- <li><p style="margin-bottom: 0in">Create the Module Implementation</p>
- </li>
- <li><p style="margin-bottom: 0in">Create the Handlers</p>
- </li>
- <li><p style="margin-bottom: 0in">Create the module.xml</p>
- </li>
- <li><p style="margin-bottom: 0in">Modify the "axis2.xml" (if you need
- custom phases)</p>
- </li>
- <li><p style="margin-bottom: 0in">Modify the "services.xml" to engage
- modules at the deployment time.</p>
- </li>
- <li><p style="margin-bottom: 0in">Package in a ".mar" (Module Archive)</p>
- </li>
- <li><p>Deploy the module in Axis2</p>
- </li>
-</ol>
-
-<h3>MyService with a Logging Module</h3>
-
-<p>Let's write a simple logging module for our sample. This module contains
-one handler that just logs the message that is passed though it. Axis2 uses
-."mar" (Module Archive) to deploy modules in Axis2. Following diagram shows
-the file structure inside that needs to be there in the ".mar" archive. Let's
-create all these and see how it works.</p>
-
-<p><img src="images/userguide/ModuleView.jpg" name="Graphic5" align="bottom"
-width="185" height="120" border="0"></p>
-
-<h4>Step1 : LoggingModule Class</h4>
-
-<p>LoggingModule is the implementation class of the Axis2 module. Axis2
-modules should implement the "org.apache.axis2.modules.Module" interface with
-the following methods.</p>
-<pre>public void init(AxisConfiguration axisSystem) throws AxisFault;//Initialize the module
-public void shutdown(AxisConfiguration axisSystem) throws AxisFault;//End of module processing</pre>
-
-<p>These methods can be used to control the module initialization and the
-termination. With the input parameter AxisConfiguration, the user is provided
-with the complete configuration hierarchy and this can be used to fine tune
-the module behavior by the module writers. For the simple logging service, we
-can keep these methods blank in our implementation class.</p>
-
-<h4>Step2 : LogHandler</h4>
-
-<p>A module in axis2 can contain, one or more handlers that perform various
-SOAP header processing at different phases. (See<a
-href="file:///G:/Documents and Settings/Jaliya/Desktop/Axis2ArchitectureGuide.html">
-Architecture Guide</a> for more information about phases). For the logging
-module we will write a handle with the following methods. "public void
-invoke(MessageContext ctx);" is the method that is called by the Axis2 engine
-when the control is passed to the handler. "public void revoke(MessageContext
-ctx);" is called when the handlers are revoked by the Axis2 engine.</p>
-<pre>public class LogHandler extends AbstractHandler implements Handler {
- private Log log = LogFactory.getLog(getClass());
- private QName name;
-
- public QName getName() {
- return name;
- }
-
- public void invoke(MessageContext msgContext) throws AxisFault {
- log.info(msgContext.getEnvelope().toString());
- }
-
- public void revoke(MessageContext msgContext) {
- log.info(msgContext.getEnvelope().toString());
- }
-
- public void setName(QName name) {
- this.name = name;
- }
-}</pre>
-
-<h4>Step3 : module.xml</h4>
-
-<p>"module.xml" contains the deployment configurations for a particular
-module. It contains details such as Implementation class of the module (in
-this example it is the "LoggingModule" class and the various handlers that
-will run in different phases. "module.xml" for the logging module will be as
-follows.</p>
-<pre><module name="logging" class="userguide.loggingmodule.LoggingModule ">
-<inflow>
- <handler name="InFlowLogHandler" class="userguide.loggingmodule.LogHandler">
- <order phase="loggingPhase" />
- </handler>
-</inflow>
-
-<outflow>
- <handler name="OutFlowLogHandler" class="userguide.loggingmodule.LogHandler">
- <order phase="loggingPhase"/>
- </handler>
-</outflow>
-
-<Outfaultflow>
- <handler name="FaultOutFlowLogHandler" class="userguide.loggingmodule.LogHandler">
- <order phase="loggingPhase"/>
- </handler>
-</Outfaultflow>
-
-<INfaultflow>
- <handler name="FaultInFlowLogHandler" class="userguide.loggingmodule.LogHandler">
- <order phase="loggingPhase"/>
- </handler>
-</INfaultflow>
-</module></pre>
-
-<p>As it can be seen there are four phases defined in this "module.xml"</p>
-<ol>
- <li><p style="margin-bottom: 0in">inflow - Represents the
- handler chain that will run when a message is coming in. </p>
- </li>
- <li><p style="margin-bottom: 0in">outflow - Represents the
- handler chain that will run when the message is going out. </p>
- </li>
- <li><p style="margin-bottom: 0in">Outfaultflow - Represents the
- handler chain that will run when there is a fault and the fault is going
- out </p>
- </li>
- <li><p>INfaultflow - Represents the handler chain that will run when
- there is a fault and the fault is coming in </p>
- </li>
-</ol>
-
-<p>Following set of tags describe the name of the handler, handler class and
-the phase in which this handler going to run."InFlowLogHandler" is the name
-given for the particular instance of this handler. The property, class is the
-actual implementation class for this handler. Since we are writing logging
-handler, we can reuse the same handler in all these phases, however this may
-not be the same for all the modules. "<order phase="loggingPhase" />"
-describes the phase in which this handler runs.</p>
-<pre><handler name="InFlowLogHandler" class="userguide.loggingmodule.LogHandler">
-<order phase="loggingPhase" />
-</handler></pre>
-
-<h4>Step 4: Modify the "axis2.xml"</h4>
-
-<p>In this handler the phase "loggingPhase" is defined by the module writer.
-It is not a pre-defined handler phase and hence the module writer should
-introduce it to the "axis2.xml" (NOT the services.xml) so that Axis2 engine
-knows where to place the handler in different "flows" (<br>
-InFlow, OutFlow, etc...). Following xml lines shows the respective changes to
-the "axis2.xml" in order for us to deploy this logging module in Axis2
-engine. This is an extract of the phase section of the "axis2.xml".</p>
-<pre><!-- ================================================= -->
-<!-- Phases -->
-<!-- ================================================= -->
-<phaseOrder type="inflow">
-<!-- System pre defined phases -->
- <phase name="TransportIn"/>
- <phase name="PreDispatch"/>
- <phase name="Dispatch"/>
- <phase name="PostDispatch"/>
-<!-- System pre defined phases -->
-
-<!-- After Postdispatch phase module author or or service author can add any phase he want -->
-<phase name="<font color="#33cc00">loggingPhase</font>"/>
-</phaseOrder>
-
-<phaseOrder type="outflow">
-<!-- user can add his own phases to this area -->
-<phase name="<font color="#33cc00">loggingPhase</font>"/>
-</phaseOrder>
-
-<phaseOrder type="INfaultflow">
-<!-- user can add his own phases to this area -->
-<phase name="<font color="#33cc00">loggingPhase</font>"/>
-</phaseOrder>
-
-<phaseOrder type="Outfaultflow">
-<!-- user can add his own phases to this area -->
-<phase name="<font color="#33cc00">loggingPhase</font>"/>
-</phaseOrder></pre>
-
-<p>Shown in green, the custom phase "loggingPhase" is placed in all the
-flows, and hence that phase will be called in all the message flows in the
-engine. Since our module is associated with this phase, the LogHandler is now
-have a phase for it to get executed.</p>
-
-<h4>Step5 : Modify the "services.xml"</h4>
-
-<p>Up to this point we have created the required classes and the
-configuration descriptions for the logging module and by changing the
-"axis2.xml" we have created the required phases for the logging module. Now
-the next step is to "<b>engage</b>" (use) this module in one of our services.
-For this, let's use the same Web Service that we have used throughout the
-user guide, the MyService. However, since we need to modify the
-"services.xml" of the MyService in order for us engage this module, we use a
-separate Web Service, but with the similar operations. The code for this
-service can be found in the
-"Axis2Home/samples/userguide/src/userguide/example2" directory. The simple
-changes that we have done to he "services.xml' are shown in the green color
-in the following lines of xml.</p>
-<pre><service name="<font color="#33cc00">MyServiceWithModule</font>">
-<description>
-This is a sample Web Service with a logging module engaged.
-</description>
-<font color="#33cc00"><module ref="logging"/></font>
-<parameter name="ServiceClass" locked="xsd:false">userguide.example2.MyService</parameter>
-<operation name="echo">
-<messageReceiver class="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>
-</operation>
-<operation name="ping">
-<messageReceiver class="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>
-</operation>
-</service></pre>
-
-<p>In this example we have changed the service name (the implementation class
-is very similar to what we have used earlier although it is in a different
-package). In addition we have added the line <b>"<module
-ref="logging"/>"</b> to the "services.xml". This informs the Axis2 engine
-that the module "logging" should be engaged for this service. The handler in
-side the module will be executed in their respective phases as described by
-the "module.xml".</p>
-
-<p><b>Step6 : Packaging</b></p>
-
-<p>Before deploying the module we need to create the ".mar" file for this
-module. This can be done, using the "jar" command and then renaming the
-created jar file, or you can find the "Logging.mar" that is already created
-for you in the "Axis2Home/samples/userguide" directory.</p>
-
-<h4>Step7 : Deploy the Module in Axis2</h4>
-
-<p>Deploying a module in Axis2 require the user to create a directory with
-the name "modules" in the "webapps/axis2/WEB-INF" directory of their servlet
-container and then copying the ".mar" file to that directory. So let's first
-create the "modules" directory and drop the "LoggingModule.mar" in to this
-directory.</p>
-
-<p>Although the required changes to the "services.xml" is very little, we
-have created a separate service archive (MyServiceWithModule.aar) for users
-to just deploy and see. Please deploy this service using the same steps that
-you use to deploy "MyService" and copy the "LoggingModule.mar" file to the
-"modules" directory. Then by using the "TestWebServiceWithModuleClient.bat"
-and "TestWebServiceWithModuleClient.sh" in the
-"Axis2Home/samples/userguide/src/userguide/clients/bin" directory.</p>
-
-<p>Note: To see the logs, the user needs to modify the "log4j.properties" to
-log INFO as well. The property file is located in
-"webapps\axis2\WEB-INF\classes" of your servlet container. Change the line
-"log4j.rootCategory= ERROR, LOGFILE" to "log4j.rootCategory=INFO, ERROR,
-LOGFILE".</p>
-
-<h2> </h2>
-
-<h2><a name="Other_Samples"></a>Other Samples</h2>
-
-<p>To show the power and usage of Axis2, three standard samples are shipped
-with the binary distribution. These are meant to interact with outside web
-services and prove the capabilities of the Axis2 system.</p>
-
-<p>The included samples are</p>
-<ul>
- <li><p style="margin-bottom: 0in">Google spell checker sample<!--<li>Google search sample</li> -->
- </p>
- </li>
- <li><p>Amazon queuing sample</p>
- </li>
-</ul>
-
-<p>Following is a simple introduction to each of the samples. Each sample
-contains it's own help document that says about the usage and the advanced
-operations of that particular sample.</p>
-
-<h4>Google spell checker sample</h4>
-
-<p>This includes a spell checker program that uses the Google spell checking
-service. It demonstrates the blocking and non-blocking modes of calling the
-service. This sample can be found at the samples\googleSpellcheck folder and
-can be easily started using either the batch file or the shell script.</p>
-
-<h4>Google search sample</h4>
-
-<p>This includes a search program that uses the familiar Google search over
-the SOAP API. It utilizes the non-blocking mode of the client API. This
-sample can be found at the samples\googleSearch folder and can be easily
-started using either the batch file or the shell script.</p>
-
-<h4>Amazon queuing service</h4>
-
-<p>Amazon queuing service sample shows how to use the Amazon queuing service.
-it has two user interfaces , one to enqueue and the other dequeue. This
-sample is included in the samples\amazonQS and also contains the batch/shell
-scripts to run.</p>
-
-<h3>Where are these samples ?</h3>
-
-<p>The most obvious place to look for the samples are the binary
-distribution. all these samples are included in the samples directory in the
-binary distribution. The shell scripts and the batch files are in fact
-written to use the binary distributions root directory as the home to find
-the libraries.</p>
-
-<p>The other way is to build the samples from source. Moving to the
-modules/samples and running maven will create the samples in the
-target/samples directory. However if the samples need to be started using the
-shell scripts (or the batch files) then the AXIS_HOME environment need to be
-set.( the "guessed" AXIS_HOME would not be correct in this case)</p>
-
-<h2><a name="Tools"></a>Tools</h2>
-
-<p>Axis2 is shipped with two standard tools. Both the tools are Eclipse
-plug-ins, the Codegen tool even has the accompanying Ant task and the command
-line tool.</p>
-
-<p>Documentation for the code generator tool is available for the <a
-href="CodegenToolReference.html">Codegen wizard</a> and the <a
-href="ServiceArchiveToolReference.html">Service Archiver</a>.</p>
-
-<p> </p>
-
-<h2><a name="Advanced_Topics"></a>Advanced Topics</h2>
-<ul>
- <li><p style="margin-bottom: 0in"><a href="rest-ws.html">RESTful Web
- Services</a></p>
- </li>
- <li><p style="margin-bottom: 0in"><a href="tcp-transport.html">TCP
- transport</a></p>
- </li>
- <li><p style="margin-bottom: 0in"><a href="mail-transport.html">Mail
- Transport</a></p>
- </li>
- <li><p style="margin-bottom: 0in"><a href="http-transport.html">HTTP
- Transports</a></p>
- </li>
- <li><p><a href="mtom-guide.html">MTOM with Axis2</a></p>
- </li>
- <li><p><a href="security-module.html">Securing SOAP Messages with WSS4J</a></p>
- </li>
-</ul>
-</body>
-</html>
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<html>
+<head>
+ <meta http-equiv="content-type" content="text/html; charset=windows-1252">
+ <title>Axis 2.0 User's Guide</title>
+ <meta name="CREATED" content="20050918;20224042">
+ <meta name="CHANGEDBY" content="Chamikara Jayalath">
+ <meta name="CHANGED" content="20050919;1140420">
+</head>
+
+<body lang="en-US" dir="ltr">
+<h1 align="center"><a name="_Toc96697849"></a>Axis 2.0 User's Guide</h1>
+
+<h2>Contents</h2>
+<ul>
+ <li><p><a href="#Introduction">Introduction</a></p>
+ </li>
+ <li><p><a href="#What_is_Axis_2_0__">What is Axis 2.0 ?</a></p>
+ </li>
+ <li><p><a href="#Web_Services_Using_Axis2">Web Services Using Axis2</a></p>
+ </li>
+ <li><p><a href="#Web_Service_Clients_Using_Axis2">Web Service Clients Using Axis2</a></p>
+ </li>
+ <li><p><a href="#Modules">Modules</a></p>
+ </li>
+ <li><p><a href="#Other_Samples">Other Samples</a></p>
+ </li>
+ <li><p><a href="#Tools">Tools</a></p>
+ </li>
+ <li><p><a href="#Advanced_Topics">Advanced Topics</a></p>
+ </li>
+</ul>
+
+<p><br>
+<br>
+</p>
+
+<h2><a name="_Toc96698076"></a><a name="Introduction"></a>Introduction</h2>
+
+<p>Welcome to Axis 2.0, the next generation of Apache Axis !!! This User
+Guide will help you to understand what you will get from Axis 2.0 and how to
+get started. We hope you will benefit from the power of Axis 2.0.</p>
+
+<h2>Attention</h2>
+<ul>
+ <li><p style="margin-bottom: 0in">This User Guide is written based on the
+ Axis2 binary distribution, the Binary distribution can be created from
+ the source distribution using the maven goal <code>$maven
+ dist-bin</code></p>
+ </li>
+ <li><p>Before we start, its highly recommended to read <a
+ href="http://ws.apache.org/axis/java/user-guide.html">Axis 1.x User's
+ guide </a>, if you are new to Axis.</p>
+ </li>
+</ul>
+
+<h2><a name="_Toc96698077"></a><a name="What_is_Axis_2_0__"></a>What is Axis 2.0 ?</h2>
+
+<p>Axis 2.0 is the next generation of Apache Axis. In late August 2004,
+during the Axis Summit held in Colombo, Sri Lanka, a new architecture was
+introduced to have a much more flexible, efficient and configurable Axis.
+Even though the architecture is new, some of the well established concepts
+from Axis 1.x, like handlers are preserved in Axis 2.0 also. Axis 2.0 comes
+with lots of new features, enhancements and new industry specification
+implementations.</p>
+
+<p>After months of continued discussion and coding effort in this direction,
+Axis 2.0 now delivers the following key features:</p>
+<ul>
+ <li><p style="margin-bottom: 0in"><strong>Speed</strong>. Axis uses its own
+ object model and StAX (streaming) parsing to achieve significantly
+ greater speed than earlier versions of Apache AXIS.</p>
+ </li>
+ <li><p style="margin-bottom: 0in"><strong>Low memory foot print</strong>.
+ Axis 2.0 was designed ground-up keeping low memory foot print in mind.</p>
+ </li>
+ <li><p style="margin-bottom: 0in"><strong>AXIOM</strong>. Axis 2.0 comes
+ with its own light-weight object model, AXIOM, for message processing
+ which is extensible, high performance and developer convenient</p>
+ </li>
+ <li><p style="margin-bottom: 0in"><strong>Hot Deployment.</strong> One can
+ now hot deploy web services and handlers.</p>
+ </li>
+ <li><p style="margin-bottom: 0in"><strong>Asynchronous Web
+ Services</strong>. Axis 2.0 now support asynchronous web services
+ invocation and asynchronous web services.</p>
+ </li>
+ <li><p style="margin-bottom: 0in"><strong>MEP Support. </strong>Axis 2.0
+ now comes handy with support for Message Exchange Patterns.</p>
+ </li>
+ <li><p style="margin-bottom: 0in"><strong>Flexibility</strong>. The Axis
+ architecture gives the developer complete freedom to insert extensions
+ into the engine for custom header processing, system management, or
+ anything else you can imagine.</p>
+ </li>
+ <li><p style="margin-bottom: 0in"><strong>Stability</strong>. Axis defines
+ a set of published interfaces which change relatively slowly compared to
+ the rest of Axis.</p>
+ </li>
+ <li><p style="margin-bottom: 0in"><strong>Component-oriented
+ deployment</strong>. 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"><strong>Transport framework</strong>. We
+ have a clean and simple abstraction for designing 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><strong>WSDL support.</strong> Axis 2.0 supports the <a
+ href="http://www.w3.org/TR/wsdl">Web Service Description Language </a>,
+ version 1.1 and 2.0, which allows you to easily build stubs to access
+ remote services, and also to automatically export machine-readable
+ descriptions of your deployed services from Axis.</p>
+ </li>
+</ul>
+
+<p>We hope you enjoy using Axis. Please note that this is an open-source
+effort - if you feel the code could use some new features or fixes, please
+get involved and lend a hand! The Axis developer community welcomes your
+participation .</p>
+
+<p>Let us know what you think!</p>
+
+<p>Please send feedback about the package to " <a
+href="mailto:axis-user@ws.apache.org">axis-user@ws.apache.org </a>" and make
+sure to prefix the subject of the mail with [Axis2].</p>
+
+<h2><a name="_Toc96698078"></a>What's in this release?</h2>
+
+<p>This release includes the following features:</p>
+<ul>
+ <li><p style="margin-bottom: 0in">AXIOM, a SOAP specific streaming XML
+ infoset model for SOAP 1.1/1.2 Messages</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Support for One-Way Messaging and Request
+ Response Messaging</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Modules, mechanism to extend the SOAP
+ Processing Model</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Archives based deployment Model</p>
+ </li>
+ <li><p style="margin-bottom: 0in">WSDL Code Generation Tool for Stub and
+ skeletons</p>
+ </li>
+ <li><p style="margin-bottom: 0in">XML Beans based data binding support</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Support for WS-Addressing, both the
+ submission and final versions</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Client API</p>
+ </li>
+ <li><p style="margin-bottom: 0in">REST Web Service Support</p>
+ </li>
+ <li><p style="margin-bottom: 0in">HTTP transport Support</p>
+ </li>
+ <li><p style="margin-bottom: 0in">SMTP transport Support</p>
+ </li>
+ <li><p style="margin-bottom: 0in">TCP transport Support</p>
+ </li>
+ <li><p style="margin-bottom: 0in">MTOM/SWA attachments support</p>
+ </li>
+ <li><p>SAAJ implementation</p>
+ </li>
+</ul>
+
+<p>The release include following tools</p>
+<ol>
+ <li><p style="margin-bottom: 0in">Admin Web App</p>
+ </li>
+ <li><p style="margin-bottom: 0in">WSDL2WS, eclipse Plugin/Command line
+ version</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Service Archive Wizard, eclipse Plugin</p>
+ </li>
+ <li><p>Module Archive Wizard, eclipse Plugin</p>
+ </li>
+</ol>
+
+<h2><a name="_Toc96698079"></a>What's still to do?</h2>
+
+<p>Please see a list of what we think needs doing - and please consider
+helping out if you're interested & able!</p>
+<ul>
+ <li><p style="margin-bottom: 0in">JAX-RPC 1.1 and/or JAX-WS compliance</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Pluggable Data binding support</p>
+ </li>
+ <li><p style="margin-bottom: 0in">SOAP Encoding</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Binary serialization and de-serialization
+ support</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Management Interface for Axis2</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Complete XML infoset support for AXIOM</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Implementation of other transports. e.g.
+ JMS..</p>
+ </li>
+ <li><p>Web Service Policy Support</p>
+ </li>
+</ul>
+
+<h2><a name="_Toc96697863"></a><!-- Image goes here -->
+<!--<h3><a name="_Toc96698087"></a>Running the Axis2 standalone server </h3>
+<p>Since a J2EE servlet container can be heavy in certain cases, a simple socket server is provided with Axis2. </p>
+Start scripts are inluded in the bin directory of the binary distribution.</p>
+<p>For windows</p>
+<p class="command">>start.bat </p>
+<p>For Linux</p>
+<p class="command">$start.sh</p>
+<p>This will start the simple axis server in the default port (8080). To start the server in a non default port
+the server script can be used. The sever script however needs two parameters, the repository location and the port.</p>
+
+<p>For windows</p>
+<p class="command">>server <i>repository directory</i> <i>port</i> </p>
+<p>For Linux</p>
+<p class="command">$server <i>repository directory</i> <i>port</i> </p>
+
+<p><b>
+Note - the directory entered as the repository location needs to have a services directory inside. This is
+absolutely required and AXIS will not create it automatically in the case of the simple axis server.
+</b></p> -->
+Samples</h2>
+
+<p>In this section of the user guide we will look at how to write and deploy
+Web Services and how to write Web Service Clients using Axis2. All the user
+guide samples are located at the <b><font
+color="#000000">"samples/userguide/src"</font></b> directory of the binary
+distribution. So.. let's explore the samples.</p>
+
+<p>Note: Please note that the rest of this user guide assumes that the user
+has downloaded the binary distribution of Axis2. If you have already
+downloaded the source tree of Axis2 then please create the binary
+distribution by simply using the maven command <strong>maven dist-bin
+</strong>This will create the "axis2-0.91-bin.zip" and "axis2-0.91-bin.tar"
+in the "target/dist" directory. Extract the zip or the tar ball to any
+directory in your machine and for the explanations purposes we will name this
+directory as "Axis2Home".</p>
+
+<h2><a name="Web_Services_Using_Axis2"></a>Web Services Using Axis2</h2>
+
+<p>Before starting, please check whether you have deployed the "axis2.war" in
+your servlet container and it is working properly. (See <a
+href="installationguide.html">Installation Guide</a>). User can select any of
+the following two ways of writing web services using Axis2. </p>
+<ul>
+ <li><p style="margin-bottom: 0in">Use Axis2's primary interfaces and
+ implement the business logic.</p>
+ </li>
+ <li><p>Start from the WSDL ->Code generate the Skeleton ->Implement
+ the Business Logic.</p>
+ </li>
+</ul>
+
+<h3>Write My Service using Axis2</h3>
+
+<h4>MyService</h4>
+
+<p>First let's see how we can write a simple Web Service (MyService) using
+Axis2's primary interfaces and deploy it. For this purpose we will create a
+Web Service with two operations as follows.</p>
+<pre>public void ping(OMElement element){} //IN-ONLY operation, just accepts the OMElement and do some processing.
+public OMElement echo(OMElement element){}//IN-OUT operation, accepts an OMElement and
+ //responds with another OMElement after processing.</pre>
+
+<p>Complete code for this example Web Service (MyService) can be found in the
+"Axis2Home/samples/userguide/src" directory under "userguide/example1"
+package. As you can see, the two operations are very simple and need no
+explanations on what they are doing. So let's see how we can write the
+deployment descriptors for the service and deploy it.</p>
+
+<h4>How to write the Web Service?</h4>
+
+<p>Write a new Web Service with Axis2 involve four steps</p>
+<ol>
+ <li><p style="margin-bottom: 0in">Write the Implementation Class</p>
+ </li>
+ <li><p style="margin-bottom: 0in">Write a services.xml file to explain the
+ Web Service</p>
+ </li>
+ <li><p style="margin-bottom: 0in">create a *.aar archive for the Web
+ Service</p>
+ </li>
+ <li><p>Deploy the Web Service</p>
+ </li>
+</ol>
+
+<h4>Step1 :Write the Implementation Class</h4>
+
+<p>Provides a implementation class that provide the business logic for the
+Web Service, it should have methods that match the operations in the Web
+Service. Unless you have data binding the signature of the methods can have
+one parameter of type OMElement.</p>
+<pre>public class MyService{
+ public void ping(OMElement element){
+ ......
+ }
+ public OMElement echo(OMElement element){
+ ......
+ }
+}</pre>
+
+<h4>Step2 :Write the services.xml file</h4>
+
+<p>Axis2 uses "services.xml" to keep configurations for a Web Service. Each
+Web Service deployed in Axis2 needs a "services.xml" containing the
+configurations. "services.xml" for MyService will be as follows; we will see
+what each parameter means later.</p>
+<pre><service name="MyService">
+ <description>
+ This is a sample Web Service with two operations, echo and ping.
+ </description>
+ <parameter name="ServiceClass" locked="xsd:false">userguide.example1.MyService</parameter>
+ <operation name="echo">
+ <messageReceiver class="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>
+ </operation>
+ <operation name="ping">
+ <messageReceiver class="org.apache.axis2.receivers.RawXMLINOnlyMessageReceiver"/>
+ </operation>
+ </service></pre>
+
+<p>As it can be seen, first line of the "services.xml" gives the name of the
+Web Service. This is used in the URL to the service as the service name. Next
+comes the description and the service class. The next two xml tags describe
+the operations that are available in this service with respective message
+receivers. For the "echo" operation we have used a
+<strong>RawXMLINOutMessageReceiver</strong> since it is an IN-OUT operation.
+For IN-ONLY operation, "ping" we have used
+<strong>RawXMLINOnlyMessageReceiver</strong> as the message receiver.</p>
+
+<p>You can write a services.xml file to include a group of services instead
+of a single service. This makes management and deployment of a set of related
+services very easy. At runtime you can share information between these
+services within a single interaction, using the ServiceGroupContext. If you
+hope to use this functionality the services.xml file should have following
+format.</p>
+<pre><serviceGroup>
+ <service name="Service1">
+ <!-- details for Service1 -->
+ </service>
+ <service name="Service2">
+ <!-- details for Service2 -->
+ </service>
+ <module ref="ModuleName" />
+ <parameter name="serviceGroupParam1" locked="xsd:false">value 1</parameter>
+</serviceGroup></pre>
+
+<h4>Step3 :Create the Web Service Archive</h4>
+
+<p>Axis2 use ".aar" (Axis Archive) file as the deployment package for Web
+Services. So, for MyService we will use "MyService.aar" with the
+"services.xml" packaged in the META-INF as shown in the following picture.</p>
+
+<p><img src="images/userguide/ServiceItems.jpg" name="Graphic1"
+align="bottom" width="176" height="91" border="0"></p>
+
+<p>To create "MyService.aar" user can first create a jar file containing all
+the files necessary for the service and then rename the "jar" to "aar" so
+that Axis2 understands it as a service archive. This has already been created
+in the "Axis2Home/samples/userguide" directory, and let's use it..</p>
+
+<h4>Step4 :Depoly the Web Service</h4>
+
+<p>Deploying the service is just a matter of dropping the ".aar" in to
+"services" directory that can be found in the "\webapps\axis2\WEB-INF" of
+your servlet container and hence please copy the "MyService.aar" into the
+"<b>services</b>" directory. Once these steps are completed, please start the
+servlet container (if you have not already started) and check the link "List
+Available services" in the page http://localhost:8080/axis2/index.jsp and see
+whether the MyService is deployed properly. If everything is ok, you will see
+the following out put..</p>
+
+<p align="center"><img src="images/userguide/MyServiceDeployed.jpg"
+name="Graphic2" align="bottom" width="734" height="766" border="0"></p>
+
+<p>If you can see the above output then you have successfully deployed
+MyService on Axis2. Now let's see how we can write Web Service client to use
+this services. Axis2 provides an easy way to deploy a Web Services using,
+index.jsp. (See the installation guide for more information on this)</p>
+
+<h3>Axis2SampleDocLitPortType</h3>
+
+<p>Now let's see how we can generate the skeleton from a given WSDL and
+implement the business logic using Axis2. For this we use
+Axis2SampleDocLit.wsdl that can be found in the <b>wsdl</b> directory under
+samples.</p>
+
+<h4>Generating Skeleton</h4>
+
+<p>To generate the skeleton and the required classes you can use the
+WSDL2Java tool provided in Axis2. This tool is located in the bin directory
+of the distribution and can be executed using the provided scripts (.bat or
+.sh). The tool's parameter list is as follows and user can specify these
+values depending on their requirements.</p>
+<pre>Usage WSDL2Code -uri :WSDL file location
+-o : output file location
+-a : Generate async style code only. Default if off
+-s : Generate sync style code only. Default if off. takes precedence over -a
+-p : set custom package name
+-l : valid languages are java and csharp. Default is java
+-t : Generate TestCase to test the generated code
+-ss : Generate server side code (i.e. skeletons).Default is off
+-sd : Generate service descriptor (i.e. axis2.xml).Default is off.Valid with -ss</pre>
+
+<p>We will use the tool with the following parameters and generate the
+skeleton and the other required classes.</p>
+<p>Windows users can use the following command in the console </p>
+<pre style="margin-bottom: 0.2in">WSDL2Java -uri ..\samples\wsdl\Axis2SampleDocLit.wsdl -ss -sd -o ..\samples\src -p org.apache.axis2.userguide</pre>
+
+<p>Linux users should switch the file seperator</p>
+<pre style="margin-bottom: 0.2in">WSDL2Java -uri ../samples/wsdl/Axis2SampleDocLit.wsdl -ss -sd -o ../samples/src -p org.apache.axis2.userguide</pre>
+
+<p>This will generate the required classes in the <b>src</b> directory inside
+samples. This will also generate the schema classes in a directory named
+<b>schema</b> and please note that these are not source files and should be
+availed in the class path in order to compile the generated classes</p>
+
+<h4>Implement the Business Logic</h4>
+
+<p>Locate the skeleton class that can be found under src/userguide directory
+with the name "Axis2SampleDocLitPortTypeSkeleton.java". This is the skeleton
+for our web service and we can easily fill the business logic now. The WSDL
+we have used has three operations as follows.</p>
+<ul>
+ <!--<li><p style="margin-bottom: 0in">echoVoid - Operation that does not
+ accept any input parameters and also provide no out put parameters. Just
+ perform some task </p>
+ </li>-->
+ <li><p style="margin-bottom: 0in">echoString - Operation that echos a
+ String value </p>
+ </li>
+ <li><p style="margin-bottom: 0in">echoStringArray - Operation that accept
+ string array as the input and echos them back</p>
+ </li>
+ <li><p>echoStruct - Operation that accept a Struct as the input and echos
+ them back.</p>
+ </li>
+</ul>
+
+<!--<h4>echoVoid </h4>
+
+<p>Locate the following code segment in the
+"Axis2SampleDocLitPortTypeSkeleton.java" and fill the business logic. For
+the explanation purpose we do not need anything to be implemented here.</p>
+<pre>public void echoVoid(){
+ //Todo fill this with the necessary business logic
+}</pre> -->
+
+<h4>echoString </h4>
+
+<p>Locate the following code segment in the
+"Axis2SampleDocLitPortTypeSkeleton.java" and fill the business logic as
+shown below.</p>
+<pre> public org.soapinterop.xsd.EchoStringArrayReturnDocument
+ echoStringArray(org.soapinterop.xsd.EchoStringArrayParamDocument param2){
+ //Todo fill this with the necessary business logic
+ return null;
+ }</pre>
+
+<p>Once filled with the business logic it will be as follows. The code is
+simple and the explanations are given in the comments.</p>
+<pre>public org.soapinterop.xsd.EchoStringReturnDocument
+ echoString(org.soapinterop.xsd.EchoStringParamDocument param6) {
+ //Use the factory to create the output document.
+ EchoStringReturnDocument retDoc = EchoStringReturnDocument.Factory.newInstance();
+ //send the string back.
+ retDoc.setEchoStringReturn(param6.getEchoStringParam());
+ return retDoc;
+}</pre>
+
+<p>Similarly following code fragments shows how you can fill the business
+logic for our first web service.</p>
+
+<h4>echoStringArray</h4>
+<pre>public org.soapinterop.xsd.EchoStringArrayReturnDocument
+ echoStringArray(org.soapinterop.xsd.EchoStringArrayParamDocument param2) {
+
+ //Use the factory to create the output document.
+ EchoStringArrayReturnDocument retDoc = EchoStringArrayReturnDocument.Factory.newInstance();
+
+ //Get the String array from the input parameters.
+ String[] inParams = param2.getEchoStringArrayParam().getStringArray();
+ ArrayOfstringLiteral retParams = ArrayOfstringLiteral.Factory.newInstance();
+ //Set the input parameters to the output parameters for echoing.
+ for (int i = 0; i < inParams.length; i++) {
+ retParams.addString(inParams[i]);
+ }
+
+ //return the output document.
+ retDoc.setEchoStringArrayReturn(retParams);
+ return retDoc;
+}</pre>
+
+<h4>echoStruct</h4>
+<pre>public org.soapinterop.xsd.EchoStructReturnDocument
+ echoStruct(org.soapinterop.xsd.EchoStructParamDocument param4) {
+
+ //Use the factory to create the output document.
+ EchoStructReturnDocument retDoc = EchoStructReturnDocument.Factory.newInstance();
+
+ //Get the SOAPStrcut from the incoming parameters
+ SOAPStruct inStruct = param4.getEchoStructParam();
+
+ //Struct for the sending back
+ SOAPStruct outStruct = SOAPStruct.Factory.newInstance();
+
+ //Fill the outgoing struct
+ outStruct.setVarFloat(inStruct.getVarFloat());
+ outStruct.setVarInt(inStruct.getVarInt());
+ outStruct.setVarString(inStruct.getVarString());
+ //Set the outgoing document.
+ retDoc.setEchoStructReturn(outStruct);
+
+ return retDoc;
+}</pre>
+
+<h4>services.xml</h4>
+
+<p> Axis2 uses "services.xml" to hold the configuretions for a particular web
+service deployed in the Axis2 engine. When we generate the skeleton using the
+WSDL2Java tool, it will also generate the required services.xml for this web
+service as well and it can be found in the same directory as the skeleton.
+The generated services.xml is as follows.</p>
+<pre><!--Auto generated Axis Service XML-->
+<service name="Axis2SampleDocLitPortTypeSkeletonTest">
+<parameter locked="xsd:false" name="ServiceClass">userguide.Axis2SampleDocLitPortTypeSkeleton</parameter>
+<!--Mounting the method echoStringArray-->
+<operation name="echoStringArray">
+<messageReceiver class="userguide.Axis2SampleDocLitPortTypeMessageReceiver"/>
+</operation>
+<!--Mounting the method echoStruct-->
+<operation name="echoStruct">
+<messageReceiver class="userguide.Axis2SampleDocLitPortTypeMessageReceiver"/>
+</operation>
+<!--Mounting the method echoString-->
+<operation name="echoString">
+<messageReceiver class="userguide.Axis2SampleDocLitPortTypeMessageReceiver"/>
+</operation>
+</service></pre>
+
+<p>As it can be seen, first line of the "services.xml" gives the name of the
+Web Service. This is used in the URL to the service as the service name. Next
+comes the description and the service class. The next xml tags describe the
+operations that are available in this service with respective message
+receivers.</p>
+
+<h4>Packaging</h4>
+
+<p>Next step in the process is to package the classes in a .aar (axis2
+archive) and deploy it in Axis2. When the WSDL2Java tool generate the
+skeleton it will also generate the required data binding classes as well.
+These schema related classes are located in the <b>schema </b>directory of
+the generated code. Copy this to your class path and compile the skeleton and
+the supporting classes. In order to create the .aar file, let's create the
+following directory structure with the required files and then simply use jar
+command to package it.</p>
+
+<p><img src="images/userguide/DirectoryStructure.JPG" name="Graphic3"
+align="bottom" width="164" height="142" border="0"></p>
+
+<p>Go to the top level directory where you can find the class files for the
+above service (i.e. one level up in the directory structure shown above) and
+type the following command in a command line.</p>
+<pre style="margin-bottom: 0.2in">jar -cf Axis2SampleDocLitPortType.aar .</pre>
+
+<p>Deploying the service is just a matter of dropping the ".aar" in to
+"services" directory that can be found in the "\webapps\axis2\WEB-INF" of
+your servlet container and hence please copy the "echo.aar" into the
+"<b>services</b>" directory. Once these steps are completed, please start the
+servlet container (if you have not already started) and check the link "List
+Available services" in the page http://localhost:8080/axis2/index.jsp and see
+whether the Axis2SampleDocLitPortType is deployed properly. If everything is
+ok, you will see the following out put..</p>
+
+<p align="center"><img src="images/userguide/ServiceDeployed.JPG"
+name="Graphic4" align="bottom" width="734" height="764" border="0"></p>
+
+<p>If you can see the above output then you have successfully deployed
+Axis2SampleDocLitPortType on Axis2. Now let's see how we can write Web
+Service client to use this services. Axis2 provides an easy way to deploy a
+Web Services using, index.jsp. (See the installation guide for more
+information on this)</p>
+
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