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Posted to java-dev@axis.apache.org by ch...@apache.org on 2007/04/05 12:48:37 UTC
svn commit: r525794 -
/webservices/axis2/branches/java/1_2/xdocs/@axis2_version_dir@/userguide-buildingservices.html
Author: chatra
Date: Thu Apr 5 03:48:36 2007
New Revision: 525794
URL: http://svn.apache.org/viewvc?view=rev&rev=525794
Log:
resolved jira https://issues.apache.org/jira/browse/AXIS2-2140
Modified:
webservices/axis2/branches/java/1_2/xdocs/@axis2_version_dir@/userguide-buildingservices.html
Modified: webservices/axis2/branches/java/1_2/xdocs/@axis2_version_dir@/userguide-buildingservices.html
URL: http://svn.apache.org/viewvc/webservices/axis2/branches/java/1_2/xdocs/%40axis2_version_dir%40/userguide-buildingservices.html?view=diff&rev=525794&r1=525793&r2=525794
==============================================================================
--- webservices/axis2/branches/java/1_2/xdocs/@axis2_version_dir@/userguide-buildingservices.html (original)
+++ webservices/axis2/branches/java/1_2/xdocs/@axis2_version_dir@/userguide-buildingservices.html Thu Apr 5 03:48:36 2007
@@ -1,582 +1,583 @@
-<?xml version="1.0" encoding=""?>
-<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
-<head>
- <meta http-equiv="content-type" content="" />
- <title>Introducing Axis2</title>
- <link href="../css/axis-docs.css" rel="stylesheet" type="text/css"
- media="all" />
-</head>
-
-<body>
-<a name="buildservices"></a>
-
-<h1>Apache Axis2 User's Guide -Building Services</h1>
-
-<p>Now that you know how to use Axis2 to generate clients from WSDL, this
-section digs a little deeper showing you how to create services, and also how
-to create services and clients "from scratch", so to speak.</p>
-<ul>
- <li><a href="userguide.html#intro">Introducing Axis2</a><br />
-
- <ul>
- <li><a href="userguide.html#whatis">What is Axis2?</a></li>
- <li><a href="userguide.html#underhood">What's Under the Hood?</a></li>
- <li><a href="userguide.html#handlessoap">How Axis2 Handles SOAP
- Messages</a></li>
- <li><a href="userguide.html#distributions">Axis2 Distributions</a></li>
- <li><a href="userguide.html#sbd">The Axis2 Standard Binary
- Distribution</a></li>
- <li><a href="userguide.html#hierarchy">Axis2.war Directory
- Hierarchy</a></li>
- <li><a href="userguide.html#docs">Axis2 Documents Distribution</a></li>
- <li><a href="userguide.html#clients">Axis2 and Clients</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"><strong>Building
- Services</strong></a><br />
-
- <ul>
- <li><a
- href="userguide-buildingservices.html#getcomfortable"><strong>Getting
- Comfortable with Available Options</strong></a></li>
- <li><a
- href="userguide-buildingservices.html#createscratch"><strong>Creating
- a Service from Scratch</strong></a></li>
- <li><a
- href="userguide-buildingservices.html#deploypojo"><strong>Deploying
- Plain Old Java Objects</strong></a></li>
- <li><a
- href="userguide-buildingservices.html#deployrun"><strong>Deploying
- and Running an Axis2 Service Created from WSDL</strong></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>
-
-<p><a name="getcomfortable"></a></p>
-
-<h2>Getting Comfortable with the Available Options</h2>
-
-<p>Axis2 provides a number of ways to create a service, such as:</p>
-<ul>
- <li>Create a service and build it from scratch. In this case, you build
- your service class to specifically access AXIOM OMElement objects, then
- create the services.xml file and package it for deployment.</li>
- <li>Deploy Plain Old Java Objects (POJOs) as a service.</li>
- <li>Generate the service from WSDL. Just as you can generate clients with
- WSDL, you can also generate the skeleton of a service.</li>
-</ul>
-
-<p>Let's look at these three options.</p>
-<a name="createscratch"></a>
-
-<h2>Creating a Service from Scratch</h2>
-
-<p>Creating a service from scratch is not the most convenient way to do it,
-but it does give you the most control. The process involves several steps.</p>
-
-<p><b>The short story:</b></p>
-<ol>
- <li>Create the service class with each operation that is represented by a
- method that takes an org.apache.axiom.om.OMElement object as its
- argument. (An OMElement is how the AXIs2 Object Model (AXIOM) represents
- an XML element.)</li>
- <li>Create the service descriptor, services.xml, which defines the class to
- be used by the service and the appropriate message receivers.</li>
- <li>Create the .aar file, with the classes in their proper locations based
- on the package and the services.xml file in the META-INF directory.</li>
- <li>Deploy the .aar file by using the <a href="webadminguide.html">Web
- Administration application</a> or by copying it to the Axis2 services
- directory.</li>
-</ol>
-
-<p><b>The long story:</b></p>
-
-<p>Start by creating the service class, a plain Java class that uses classes
-from the Axis2 libraries (see Code Listing 8).</p>
-
-<h3>Code Listing 8-Creating the Service Class</h3>
-<pre>package org.apache.axis2.axis2userguide;
-
-import javax.xml.stream.XMLStreamException;
-import org.apache.axiom.om.OMAbstractFactory;
-import org.apache.axiom.om.OMElement;
-import org.apache.axiom.om.OMFactory;
-import org.apache.axiom.om.OMNamespace;
-
-public class SampleService {
-
- public OMElement sayHello(OMElement element)
- throws XMLStreamException {
- element.build();
- element.detach();
-
- String rootName = element.getLocalName();
- System.out.println("Reading "+rootName+" element");
-
- OMElement childElement = element.getFirstElement();
- String personToGreet = childElement.getText();
-
- OMFactory fac = OMAbstractFactory.getOMFactory();
- OMNamespace omNs = fac.createOMNamespace(
- "http://example1.org/example1", "example1");
- OMElement method = fac.createOMElement("sayHelloResponse",
-omNs);
- OMElement value = fac.createOMElement("greeting", omNs);
- value.addChild(fac.createOMText(value, "Hello,
-"+personToGreet));
- method.addChild(value);
-
- return method;
- }
-
- private void ping(){
- }
-
-}</pre>
-
-<p>Make sure to include Axis2 libraries in your class path when compiling the
-source.</p>
-
-<p>Axis2 uses AXIOM, or the AXIs Object Model, a DOM (Document Object Model)
--like structure that is based on the StAX API ( Streaming API for XML).
-Methods that act as services must take an OMElement as their argument, which
-represents the payload of the incoming SOAP message. (An OMElement is just
-AXIOM's way of representing an XML element, like a DOM Element object.) In
-this case, you're extracting the contents of the first child of the payload
-element, adding text to it, and using it as content for the return OMElement.
-Unless this is an "in only" service, these methods must return an OMElement,
-because that becomes the payload of the return SOAP message.</p>
-
-<p>To turn this class into a service, create the service description file,
-services.xml, as in Code Listing 9.</p>
-
-<h3>Code Listing 9 - Create the Service Description</h3>
-<pre><service name="UserGuideSampleService">
- <description>
- This is a sample service created in the Axis2 User's Guide
- </description>
-
- <parameter name="ServiceClass"
-locked="false">org.apache.axis2.axis2userguide.SampleService
-</parameter>
-
- <operation name="sayHello">
- <messageReceiver
-class="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>
- </operation>
- <operation name="ping">
- <messageReceiver
-class="org.apache.axis2.receivers.RawXMLINOnlyMessageReceiver"/>
- </operation>
-</service></pre>
-
-<p>This document defines the service, called by the <a
-href="webadminguide.html">Web Administration Application</a>, and the class
-used to serve requests. For each operation, it defines the appropriate
-message receiver class.</p>
-
-<p>Create a new directory, META-INF, in the main directory for the class. (In
-this case, that's the same directory that contains the org directory) and
-place the services.xml file in it.</p>
-
-<p>Create the .aar file by typing: jar cvf SampleService.aar
-./*</p>
-
-<p>Deploy the SampleService.aar file by using the <a
-href="webadminguide.html">Web Administration application</a> or by copying it
-to the Axis2 services directory.</p>
-
-<p>Now you can create a client class that accesses the service directly (see
-Code Listing 10).</p>
-
-<h3>Code Listing 10 - Create a Client Class that Accesses the Service
-Directly</h3>
-<pre>package org.apache.axis2.axis2userguide;
-
-import javax.xml.stream.XMLStreamException;
-import org.apache.axiom.om.OMAbstractFactory;
-import org.apache.axiom.om.OMElement;
-import org.apache.axiom.om.OMFactory;
-import org.apache.axiom.om.OMNamespace;
-import org.apache.axis2.addressing.EndpointReference;
-import org.apache.axis2.client.Options;
-import org.apache.axis2.Constants;
-import org.apache.axis2.client.ServiceClient;
-
-public class SampleClient {
-
- private static EndpointReference targetEPR =
- new EndpointReference(
- "http://localhost:8080/axis2/services/UserGuideSampleService");
-
- public static OMElement greetUserPayload(String personToGreet) {
- OMFactory fac = OMAbstractFactory.getOMFactory();
- OMNamespace omNs = fac.createOMNamespace(
- "http://example1.org/example1", "example1");
- OMElement method = fac.createOMElement("sayHello", omNs);
- OMElement value = fac.createOMElement("personToGreet",
-omNs);
- value.addChild(fac.createOMText(value, personToGreet));
- method.addChild(value);
- return method;
- }
-
- public static void main(String[] args) {
- try {
- OMElement payload =
-SampleClient.greetUserPayload("John");
- Options options = new Options();
- options.setTo(targetEPR);
-
-options.setTransportInProtocol(Constants.TRANSPORT_HTTP);
-
- ServiceClient sender = new ServiceClient();
- sender.setOptions(options);
- OMElement result = sender.sendReceive(payload);
-
- String response = result.getFirstElement().getText();
- System.out.println(response);
-
- } catch (Exception e) { //(XMLStreamException e) {
- System.out.println(e.toString());
- }
- }
-
-}</pre>
-
-<p>This class uses the same technique of sending and receiving OMElements,
-but it's also important to note the use of the Options class. This class
-enables you to determine properties such as the transport used for the return
-message (the transport used for the outgoing message can be inferred from the
-URL of the destination) and the SOAP version to use. In addition to providing
-setter and getter methods of specific properties that affect how the client
-interacts with the service, the Options class enables you to create
-inheritance relationships between Options objects. So if a property is not
-found in the current Options object used, the client can check the parent
-Options object of the current Options object.</p>
-
-<p>Compile and run the above SampleClient.java. Make sure to have all axis2
-libraries in your class path. If all has gone well, 'Hello, John' will be
-shown as the output in the console.</p>
-<a name="deploypojo"></a>
-
-<h2>Deploying Plain Old Java Objects (POJOs)</h2>
-
-<p>One very easy way to create a Web service is simply to deploy the Java
-objects that represent the service. Start with the class, shown in Code
-Listing 11.</p>
-
-<h3><b>Code Listing 11 - Creating the Class SampleService</b></h3>
-<pre>package org.apache.axis2.axis2userguide;
-
-public class SampleService {
-
- public void doInOnly(){
- return;
- }
-
- public String noParameters(){
- return "Hello";
- }
-
- public String twoWayOneParameterEcho(String toEcho){
- return toEcho;
- }
-
- public boolean multipleParametersAdd(float price, int itemId,
- String description, String itemName){
- //Code to handle the logic
- return true;
- }
-
-}</pre>
-
-<p>Next, you'll need to tell Axis2 what class corresponds with what Web
-service calls. Do this by creating a file called services.xml and adding the
-following shown in Code Listing 12.</p>
-
-<h3><b>Code Listing 12 - Creating services.xml</b></h3>
-<pre><service name="SampleService" scope="application">
- <description>
- Sample Service
- </description>
- <messageReceivers>
- <messageReceiver
- mep="http://www.w3.org/2004/08/wsdl/in-only"
- class="org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver"/>
- <messageReceiver
- mep="http://www.w3.org/2004/08/wsdl/in-out"
- class="org.apache.axis2.rpc.receivers.RPCMessageReceiver"/>
- </messageReceivers>
- <parameter name="ServiceClass">
- org.apache.axis2.axis2userguide.SampleService
- </parameter>
-</service></pre>
-
-<p>This file makes the InOnly and InOut MEPs available to the service and
-tells Axis2 which class to call; operations must match method names. In other
-words, Axis2 automatically sends a call to the multipleParametersAdd
-operation to the
-org.apache.axis2.axis2userguide.SampleService.multipleParametersAdd()
-method.</p>
-
-<p>Now it's time to create the distribution. Arrange your files in the
-following directory structure (see Code Listing 13).</p>
-
-<h3><b>Code Listing 13- Create the Directory Structure for the
-Distribution</b></h3>
-<pre> - SampleService
- - META-INF
- - services.xml
- - org
- - apache
- - axis2
- - axis2userguide
- - SampleService.class</pre>
-
-<p>Finally, deploy the service by copying the SampleService directory to the
-webapps/axis2/WEB-INF/services directory on the servlet engine. You can check
-to make sure that it's been properly deployed by checking <a
-href="http://<host>:<port>/axis2/services/listServices">http://<host>:<port>/axis2/services/listServices</a>.</p>
-<a name="deployrun"></a>
-
-<h2>Deploying and Running an Axis2 Service Created from WSDL</h2>
-
-<p>If you have a WSDL file, you can easily create and deploy a service based
-on that description. For example, to create a service based on the same WSDL
-file used in the <a href="userguide-creatingclients.html">clients section</a>
-of this document, you will follow the steps below.</p>
-
-<p><b>The short story:</b></p>
-<ol>
- <li><a
- href="http://ws.apache.org/axis2/download/@axis2_version_dir@/download.cgi#std-bin">Download</a>
- the Axis2 standard distribution, if you have not done so already.</li>
- <li>Generate the skeleton using the WSDL2Java utility, as in: <br />
-
- <pre>java org.apache.axis2.wsdl.WSDL2Java -uri file:///C:/apps/axis2/samples/zSample/Axis2UserGuide.wsdl -p org.apache.axis2.axis2userguide -d adb -s -wv 1.1 -ss -sd -ssi</pre>
- </li>
- <li>Open the *Skeleton.java file and add the functionality of your service
- to the generated methods.</li>
- <li>Build a service using Ant by typing ant jar.server</li>
- <li>Deploy the service by copying the build/lib/*.aar file to
- <J2EE_HOME>/webapps/axis2/WEB-INF/services</li>
- <li>Check http://<server>:<port>/axis2/services/listServices to
- make sure the service has been properly deployed.</li>
-</ol>
-
-<p><b>The long story:</b></p>
-
-<p>As with generating clients, you will need the <a
-href="http://ws.apache.org/axis2/download/@axis2_version_dir@/download.cgi#std-bin">Axis2
-Standard Distribution</a>, because the <a
-href="http://ws.apache.org/axis2/download/@axis2_version_dir@/download.cgi#war">Axis2 WAR
-Distribution</a> does not include the WSDL2Java utility. Once you've got it
-downloaded and unpacked, make sure that you set the AXIS2_HOME variable to
-point to the location in which you've unpacked it.</p>
-
-<p>Now you are ready to generate the actual service. To keep things neat,
-create a new directory and change to it. The WSDL file is the same one
-referenced in <a href="userguide-creatingclients#generating.xhtml">Generating
-Clients</a> and includes four operations: NoParameters,
-TwoWayOneParameterEcho, MultipleParametersAddItem, and DoInOnly. To generate
-the service, use the WSDL2Java utility, as in Code Listing 14.</p>
-
-<h3>Code Listing 14 - Using the WSDL2Java Utility to Generate the Service</h3>
-<pre>java org.apache.axis2.wsdl.WSDL2Java -uri
-file:///C:/apps/axis2/samples/zSample/Axis2UserGuide.wsdl -p
-org.apache.axis2.axis2userguide -d adb -s -wv 1.1 -ss -sd</pre>
-
-<p>This statement tells the utility you want to create a service out of the
-operations in the file Axis2UserGuide.wsdl, and that the Java classes
-generated should be in the org.apache.axis2.axis2userguide package (-p). (You
-can view the appropriate directories created.) It also indicates that you
-want to use the Axis2 DataBinding Framework, or ADB (-d), to generate only
-synchronous or blocking code (-s), and to generate server-side code (-ss) as
-opposed to a client, including the services.xml service descriptor file
-(-sd). It also specifies version 1.1 for the WSDL file (-wv).</p>
-
-<p>At this point, you should see four new items in your chosen directory: the
-build.xml file, which includes instructions for Ant, the src directory, which
-includes all the generated classes and stubs, the resources directory, which
-includes a regenerated version of the WSDL, and the services.xml file, which
-ultimately controls the service's behavior.</p>
-
-<p>You can compile the service at this point, but it doesn't actually do
-anything yet. You can solve that problem by opening the
-src\org\apache\axis2\axis2userguide\Axis2UserGuideServiceSkeleton.java file
-and either editing the code in bold -- make sure you manage parameter numbers
--- or replacing all the code with the following in Code Listing 15.</p>
-
-<h3>Code Listing 15 - Compiling the Service</h3>
-
-<p><pre>/**
- * Axis2UserGuideServiceSkeleton.java
- *
- * This file was auto-generated from WSDL
- * by the Apache Axis2 version: SNAPSHOT Oct 15, 2006 (11:23:18
-GMT+00:00)
- */
-package org.apache.axis2.axis2userguide;
-/**
- * Axis2UserGuideServiceSkeleton java skeleton for the axisService
- */
-public class Axis2UserGuideServiceSkeleton {
-
-
- /**
- * Auto generated method signature
-
- * @param param7
-
- */
- public org.apache.axis2.axis2userguide.NoParametersResponse
-NoParameters
- (org.apache.axis2.axis2userguide.NoParametersRequest param7)
-
- {
- <b>System.out.println(param7);
-
- NoParametersResponse res =
- new NoParametersResponse();
-
- return res;</b>
- }
-
-
- /**
- * Auto generated method signature
-
- * @param param9
-
- */
- public
-org.apache.axis2.axis2userguide.TwoWayOneParameterEchoResponse
-TwoWayOneParameterEcho
- (
- org.apache.axis2.axis2userguide.TwoWayOneParameterEchoRequest
-param9
- )
-
- {
- <b>System.out.println(param9.getEchoString());
-
- TwoWayOneParameterEchoResponse res =
- new TwoWayOneParameterEchoResponse();
-
- res.setEchoString(param9.getEchoString());
-
- return res;</b>
- }
-
-
- /**
- * Auto generated method signature
-
- * @param param11
-
- */
- public void DoInOnly
- (
- org.apache.axis2.axis2userguide.DoInOnlyRequest param11
- )
-
- {
- <b>System.out.println(param11.getMessageString());</b>
- }
-
-
- /**
- * Auto generated method signature
-
- * @param param12
-
- */
- public
-org.apache.axis2.axis2userguide.MultipleParametersAddItemResponse
-MultipleParametersAddItem
- (
-
-org.apache.axis2.axis2userguide.MultipleParametersAddItemRequest
-param12
- )
-
- {
- <b>System.out.println(param12.getPrice());
- System.out.println(param12.getItemId());
- System.out.println(param12.getDescription());
- System.out.println(param12.getItemName());
-
- MultipleParametersAddItemResponse res =
- new MultipleParametersAddItemResponse();
-
- res.setSuccessfulAdd(true);
- res.setItemId(param12.getItemId());
-
- return res;</b>
- }
-
-}</pre>
-</p>
-
-<p>As with generating clients, all these classes, such as
-MultipleParametersAddItemRequest and TwoWayOneParameterEchoResponse, are
-generated by the utility, and can be found in the same directory as the
-skeleton file. They include methods such as setSuccessfulAdd(), which sets
-the value of the content of an element in the response, and getItemName(),
-which retrieves the content of elements in the request.</p>
-
-<p>Save the file and compile it by typing: ant jar.server</p>
-
-<p>If all goes well, you should see the BUILD SUCCESSFUL message in your
-window, and the Axis2UserGuideService.aar file in the newly created build/lib
-directory.</p>
-
-<p><img alt="The BUILD SUCCESSFUL message in your window"
-src="images/fig05.jpg" /></p>
-
-<p>Now you need to deploy the service to the server. To do that, copy the
-Axis2UserGuideService.aar file to the WEB-INF/services directory of the
-application server. (You also have the option to use the administration
-tools. See the <a href="webadminguide.html">Web Administrator's Guide</a> for
-more information.)</p>
-
-<p>To verify that the service has been properly deployed, check the list of
-services at <a
-href="http://<host>:<port>/axis2/services/listServices">http://<host>:<port>/axis2/services/listServices</a>.</p>
-
-<p><img alt="Checking the list of services" src="images/fig06.jpg" /></p>
-
-<p>Now you should be able to access the service using any of the clients
-built in the <a href="userguide-creatingclients.html#generating">Generating
-Clients</a> document.</p>
-
-<p><strong>See Next Section</strong>- <a
-href="userguide-samples.html">Samples</a></p>
-</body>
-</html>
+<?xml version="1.0" encoding=""?>
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+ <meta http-equiv="content-type" content="" />
+ <title>Introducing Axis2</title>
+ <link href="../css/axis-docs.css" rel="stylesheet" type="text/css"
+ media="all" />
+</head>
+
+<body>
+<a name="buildservices"></a>
+
+<h1>Apache Axis2 User's Guide -Building Services</h1>
+
+<p>Now that you know how to use Axis2 to generate clients from WSDL, this
+section digs a little deeper showing you how to create services, and also how
+to create services and clients "from scratch", so to speak.</p>
+<ul>
+ <li><a href="userguide.html#intro">Introducing Axis2</a><br />
+
+ <ul>
+ <li><a href="userguide.html#whatis">What is Axis2?</a></li>
+ <li><a href="userguide.html#underhood">What's Under the Hood?</a></li>
+ <li><a href="userguide.html#handlessoap">How Axis2 Handles SOAP
+ Messages</a></li>
+ <li><a href="userguide.html#distributions">Axis2 Distributions</a></li>
+ <li><a href="userguide.html#sbd">The Axis2 Standard Binary
+ Distribution</a></li>
+ <li><a href="userguide.html#hierarchy">Axis2.war Directory
+ Hierarchy</a></li>
+ <li><a href="userguide.html#docs">Axis2 Documents Distribution</a></li>
+ <li><a href="userguide.html#clients">Axis2 and Clients</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"><strong>Building
+ Services</strong></a><br />
+
+ <ul>
+ <li><a
+ href="userguide-buildingservices.html#getcomfortable"><strong>Getting
+ Comfortable with Available Options</strong></a></li>
+ <li><a
+ href="userguide-buildingservices.html#createscratch"><strong>Creating
+ a Service from Scratch</strong></a></li>
+ <li><a
+ href="userguide-buildingservices.html#deploypojo"><strong>Deploying
+ Plain Old Java Objects</strong></a></li>
+ <li><a
+ href="userguide-buildingservices.html#deployrun"><strong>Deploying
+ and Running an Axis2 Service Created from WSDL</strong></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>
+
+<p><a name="getcomfortable"></a></p>
+
+<h2>Getting Comfortable with the Available Options</h2>
+
+<p>Axis2 provides a number of ways to create a service, such as:</p>
+<ul>
+ <li>Create a service and build it from scratch. In this case, you build
+ your service class to specifically access AXIOM OMElement objects, then
+ create the services.xml file and package it for deployment.</li>
+ <li>Deploy Plain Old Java Objects (POJOs) as a service.</li>
+ <li>Generate the service from WSDL. Just as you can generate clients with
+ WSDL, you can also generate the skeleton of a service.</li>
+</ul>
+
+<p>Let's look at these three options.</p>
+<a name="createscratch"></a>
+
+<h2>Creating a Service from Scratch</h2>
+
+<p>Creating a service from scratch is not the most convenient way to do it,
+but it does give you the most control. The process involves several steps.</p>
+
+<p><b>The short story:</b></p>
+<ol>
+ <li>Create the service class with each operation that is represented by a
+ method that takes an org.apache.axiom.om.OMElement object as its
+ argument. (An OMElement is how the AXIs2 Object Model (AXIOM) represents
+ an XML element.)</li>
+ <li>Create the service descriptor, services.xml, which defines the class to
+ be used by the service and the appropriate message receivers.</li>
+ <li>Create the .aar file, with the classes in their proper locations based
+ on the package and the services.xml file in the META-INF directory.</li>
+ <li>Deploy the .aar file by using the <a href="webadminguide.html">Web
+ Administration application</a> or by copying it to the Axis2 services
+ directory.</li>
+</ol>
+
+<p><b>The long story:</b></p>
+
+<p>Start by creating the service class, a plain Java class that uses classes
+from the Axis2 libraries (see Code Listing 8).</p>
+
+<h3>Code Listing 8-Creating the Service Class</h3>
+<pre>package org.apache.axis2.axis2userguide;
+
+import javax.xml.stream.XMLStreamException;
+import org.apache.axiom.om.OMAbstractFactory;
+import org.apache.axiom.om.OMElement;
+import org.apache.axiom.om.OMFactory;
+import org.apache.axiom.om.OMNamespace;
+
+public class SampleService {
+
+ public OMElement sayHello(OMElement element)
+ throws XMLStreamException {
+ element.build();
+ element.detach();
+
+ String rootName = element.getLocalName();
+ System.out.println("Reading "+rootName+" element");
+
+ OMElement childElement = element.getFirstElement();
+ String personToGreet = childElement.getText();
+
+ OMFactory fac = OMAbstractFactory.getOMFactory();
+ OMNamespace omNs = fac.createOMNamespace(
+ "http://example1.org/example1", "example1");
+ OMElement method = fac.createOMElement("sayHelloResponse",
+omNs);
+ OMElement value = fac.createOMElement("greeting", omNs);
+ value.addChild(fac.createOMText(value, "Hello,
+"+personToGreet));
+ method.addChild(value);
+
+ return method;
+ }
+
+ private void ping(){
+ }
+
+}</pre>
+
+<p>Make sure to include Axis2 libraries in your class path when compiling the
+source.</p>
+
+<p>Axis2 uses AXIOM, or the AXIs Object Model, a DOM (Document Object Model)
+-like structure that is based on the StAX API ( Streaming API for XML).
+Methods that act as services must take an OMElement as their argument, which
+represents the payload of the incoming SOAP message. (An OMElement is just
+AXIOM's way of representing an XML element, like a DOM Element object.) In
+this case, you're extracting the contents of the first child of the payload
+element, adding text to it, and using it as content for the return OMElement.
+Unless this is an "in only" service, these methods must return an OMElement,
+because that becomes the payload of the return SOAP message.</p>
+
+<p>To turn this class into a service, create the service description file,
+services.xml, as in Code Listing 9.</p>
+
+<h3>Code Listing 9 - Create the Service Description</h3>
+<pre><service name="UserGuideSampleService">
+ <description>
+ This is a sample service created in the Axis2 User's Guide
+ </description>
+
+ <parameter name="ServiceClass"
+locked="false">org.apache.axis2.axis2userguide.SampleService
+</parameter>
+
+ <operation name="sayHello">
+ <messageReceiver
+class="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>
+ </operation>
+ <operation name="ping">
+ <messageReceiver
+class="org.apache.axis2.receivers.RawXMLINOnlyMessageReceiver"/>
+ </operation>
+</service></pre>
+
+<p>This document defines the service, called by the <a
+href="webadminguide.html">Web Administration Application</a>, and the class
+used to serve requests. For each operation, it defines the appropriate
+message receiver class.</p>
+
+<p>Create a new directory, META-INF, in the main directory for the class. (In
+this case, that's the same directory that contains the org directory) and
+place the services.xml file in it.</p>
+
+<p>Create the .aar file by typing: jar cvf SampleService.aar ./*</p>
+
+<p>Deploy the SampleService.aar file by using the <a
+href="webadminguide.html">Web Administration application</a> or by copying it
+to the Axis2 services directory.</p>
+
+<p>Now you can create a client class that accesses the service directly (see
+Code Listing 10).</p>
+
+<h3>Code Listing 10 - Create a Client Class that Accesses the Service
+Directly</h3>
+<pre>package org.apache.axis2.axis2userguide;
+
+import javax.xml.stream.XMLStreamException;
+import org.apache.axiom.om.OMAbstractFactory;
+import org.apache.axiom.om.OMElement;
+import org.apache.axiom.om.OMFactory;
+import org.apache.axiom.om.OMNamespace;
+import org.apache.axis2.addressing.EndpointReference;
+import org.apache.axis2.client.Options;
+import org.apache.axis2.Constants;
+import org.apache.axis2.client.ServiceClient;
+
+public class SampleClient {
+
+ private static EndpointReference targetEPR =
+ new EndpointReference(
+ "http://localhost:8080/axis2/services/UserGuideSampleService");
+
+ public static OMElement greetUserPayload(String personToGreet) {
+ OMFactory fac = OMAbstractFactory.getOMFactory();
+ OMNamespace omNs = fac.createOMNamespace(
+ "http://example1.org/example1", "example1");
+ OMElement method = fac.createOMElement("sayHello", omNs);
+ OMElement value = fac.createOMElement("personToGreet",
+omNs);
+ value.addChild(fac.createOMText(value, personToGreet));
+ method.addChild(value);
+ return method;
+ }
+
+ public static void main(String[] args) {
+ try {
+ OMElement payload =
+SampleClient.greetUserPayload("John");
+ Options options = new Options();
+ options.setTo(targetEPR);
+
+options.setTransportInProtocol(Constants.TRANSPORT_HTTP);
+
+ ServiceClient sender = new ServiceClient();
+ sender.setOptions(options);
+ OMElement result = sender.sendReceive(payload);
+
+ String response = result.getFirstElement().getText();
+ System.out.println(response);
+
+ } catch (Exception e) { //(XMLStreamException e) {
+ System.out.println(e.toString());
+ }
+ }
+
+}</pre>
+
+<p>This class uses the same technique of sending and receiving OMElements,
+but it's also important to note the use of the Options class. This class
+enables you to determine properties such as the transport used for the return
+message (the transport used for the outgoing message can be inferred from the
+URL of the destination) and the SOAP version to use. In addition to providing
+setter and getter methods of specific properties that affect how the client
+interacts with the service, the Options class enables you to create
+inheritance relationships between Options objects. So if a property is not
+found in the current Options object used, the client can check the parent
+Options object of the current Options object.</p>
+
+<p>Compile and run the above SampleClient.java. Make sure to have all axis2
+libraries in your class path. If all has gone well, 'Hello, John' will be
+shown as the output in the console.</p>
+<a name="deploypojo"></a>
+
+<h2>Deploying Plain Old Java Objects (POJOs)</h2>
+
+<p>One very easy way to create a Web service is simply to deploy the Java
+objects that represent the service. Start with the class, shown in Code
+Listing 11.</p>
+
+<h3><b>Code Listing 11 - Creating the Class SampleService</b></h3>
+<pre>package org.apache.axis2.axis2userguide;
+
+public class SampleService {
+
+ public void doInOnly(){
+ return;
+ }
+
+ public String noParameters(){
+ return "Hello";
+ }
+
+ public String twoWayOneParameterEcho(String toEcho){
+ return toEcho;
+ }
+
+ public boolean multipleParametersAdd(float price, int itemId,
+ String description, String itemName){
+ //Code to handle the logic
+ return true;
+ }
+
+}</pre>
+
+<p>Next, you'll need to tell Axis2 what class corresponds with what Web
+service calls. Do this by creating a file called services.xml and adding the
+following shown in Code Listing 12.</p>
+
+<h3><b>Code Listing 12 - Creating services.xml</b></h3>
+<pre><service name="SampleService" scope="application">
+ <description>
+ Sample Service
+ </description>
+ <messageReceivers>
+ <messageReceiver
+ mep="http://www.w3.org/2004/08/wsdl/in-only"
+ class="org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver"/>
+ <messageReceiver
+ mep="http://www.w3.org/2004/08/wsdl/in-out"
+ class="org.apache.axis2.rpc.receivers.RPCMessageReceiver"/>
+ </messageReceivers>
+ <parameter name="ServiceClass">
+ org.apache.axis2.axis2userguide.SampleService
+ </parameter>
+</service></pre>
+
+<p>This file makes the InOnly and InOut MEPs available to the service and
+tells Axis2 which class to call; operations must match method names. In other
+words, Axis2 automatically sends a call to the multipleParametersAdd
+operation to the
+org.apache.axis2.axis2userguide.SampleService.multipleParametersAdd()
+method.</p>
+
+<p>Now it's time to create the distribution. Arrange your files in the
+following directory structure (see Code Listing 13).</p>
+
+<h3><b>Code Listing 13- Create the Directory Structure for the
+Distribution</b></h3>
+<pre> - SampleService
+ - META-INF
+ - services.xml
+ - org
+ - apache
+ - axis2
+ - axis2userguide
+ - SampleService.class</pre>
+
+<p>Finally, deploy the service by copying the SampleService directory to the
+webapps/axis2/WEB-INF/services directory on the servlet engine. You can check
+to make sure that it's been properly deployed by checking <a
+href="http://<host>:<port>/axis2/services/listServices">http://<host>:<port>/axis2/services/listServices</a>.</p>
+<a name="deployrun"></a>
+
+<h2>Deploying and Running an Axis2 Service Created from WSDL</h2>
+
+<p>If you have a WSDL file, you can easily create and deploy a service based
+on that description. For example, to create a service based on the same WSDL
+file used in the <a href="userguide-creatingclients.html">clients section</a>
+of this document, you will follow the steps below.</p>
+
+<p><b>The short story:</b></p>
+<ol>
+ <li><a
+ href="http://ws.apache.org/axis2/download/@axis2_version_dir@/download.cgi#std-bin">Download</a>
+ the Axis2 standard distribution, if you have not done so already.</li>
+ <li>Generate the skeleton using the WSDL2Java utility, as in: <br />
+
+ <pre>java org.apache.axis2.wsdl.WSDL2Java -uri file:///C:/apps/axis2/samples/zSample/Axis2UserGuide.wsdl -p org.apache.axis2.axis2userguide -d adb -s -wv 1.1 -ss -sd -ssi</pre>
+ </li>
+ <li>Open the *Skeleton.java file and add the functionality of your service
+ to the generated methods.</li>
+ <li>Build a service using Ant by typing ant jar.server</li>
+ <li>Deploy the service by copying the build/lib/*.aar file to
+ <J2EE_HOME>/webapps/axis2/WEB-INF/services</li>
+ <li>Check http://<server>:<port>/axis2/services/listServices to
+ make sure the service has been properly deployed.</li>
+</ol>
+
+<p><b>The long story:</b></p>
+
+<p>As with generating clients, you will need the <a
+href="http://ws.apache.org/axis2/download/@axis2_version_dir@/download.cgi#std-bin">Axis2
+Standard Distribution</a>, because the <a
+href="http://ws.apache.org/axis2/download/@axis2_version_dir@/download.cgi#war">Axis2
+WAR Distribution</a> does not include the WSDL2Java utility. Once you've got
+it downloaded and unpacked, make sure that you set the AXIS2_HOME variable to
+point to the location in which you've unpacked it.</p>
+
+<p>Now you are ready to generate the actual service. To keep things neat,
+create a new directory and change to it. The WSDL file is the same one
+referenced in <a href="userguide-creatingclients#generating.xhtml">Generating
+Clients</a> and includes four operations: NoParameters,
+TwoWayOneParameterEcho, MultipleParametersAddItem, and DoInOnly. To generate
+the service, use the WSDL2Java utility, as in Code Listing 14.</p>
+
+<h3>Code Listing 14 - Using the WSDL2Java Utility to Generate the Service</h3>
+<pre>java org.apache.axis2.wsdl.WSDL2Java -uri
+file:///C:/apps/axis2/samples/zSample/Axis2UserGuide.wsdl -p
+org.apache.axis2.axis2userguide -d adb -s -wv 1.1 -ss -sd</pre>
+
+<p>This statement tells the utility you want to create a service out of the
+operations in the file <a
+href="userguide-codelisting5.html">Axis2UserGuide.wsdl</a>, and that the
+Java classes generated should be in the org.apache.axis2.axis2userguide
+package (-p). (You can view the appropriate directories created.) It also
+indicates that you want to use the Axis2 DataBinding Framework, or ADB (-d),
+to generate only synchronous or blocking code (-s), and to generate
+server-side code (-ss) as opposed to a client, including the services.xml
+service descriptor file (-sd). It also specifies version 1.1 for the WSDL
+file (-wv).</p>
+
+<p>At this point, you should see four new items in your chosen directory: the
+build.xml file, which includes instructions for Ant, the src directory, which
+includes all the generated classes and stubs, the resources directory, which
+includes a regenerated version of the WSDL, and the services.xml file, which
+ultimately controls the service's behavior.</p>
+
+<p>You can compile the service at this point, but it doesn't actually do
+anything yet. You can solve that problem by opening the
+src\org\apache\axis2\axis2userguide\Axis2UserGuideServiceSkeleton.java file
+and either editing the code in bold -- make sure you manage parameter numbers
+-- or replacing all the code with the following in Code Listing 15.</p>
+
+<h3>Code Listing 15 - Compiling the Service</h3>
+
+<p><pre>/**
+ * Axis2UserGuideServiceSkeleton.java
+ *
+ * This file was auto-generated from WSDL
+ * by the Apache Axis2 version: SNAPSHOT Oct 15, 2006 (11:23:18
+GMT+00:00)
+ */
+package org.apache.axis2.axis2userguide;
+/**
+ * Axis2UserGuideServiceSkeleton java skeleton for the axisService
+ */
+public class Axis2UserGuideServiceSkeleton {
+
+
+ /**
+ * Auto generated method signature
+
+ * @param param7
+
+ */
+ public org.apache.axis2.axis2userguide.NoParametersResponse
+NoParameters
+ (org.apache.axis2.axis2userguide.NoParametersRequest param7)
+
+ {
+ <b>System.out.println(param7);
+
+ NoParametersResponse res =
+ new NoParametersResponse();
+
+ return res;</b>
+ }
+
+
+ /**
+ * Auto generated method signature
+
+ * @param param9
+
+ */
+ public
+org.apache.axis2.axis2userguide.TwoWayOneParameterEchoResponse
+TwoWayOneParameterEcho
+ (
+ org.apache.axis2.axis2userguide.TwoWayOneParameterEchoRequest
+param9
+ )
+
+ {
+ <b>System.out.println(param9.getEchoString());
+
+ TwoWayOneParameterEchoResponse res =
+ new TwoWayOneParameterEchoResponse();
+
+ res.setEchoString(param9.getEchoString());
+
+ return res;</b>
+ }
+
+
+ /**
+ * Auto generated method signature
+
+ * @param param11
+
+ */
+ public void DoInOnly
+ (
+ org.apache.axis2.axis2userguide.DoInOnlyRequest param11
+ )
+
+ {
+ <b>System.out.println(param11.getMessageString());</b>
+ }
+
+
+ /**
+ * Auto generated method signature
+
+ * @param param12
+
+ */
+ public
+org.apache.axis2.axis2userguide.MultipleParametersAddItemResponse
+MultipleParametersAddItem
+ (
+
+org.apache.axis2.axis2userguide.MultipleParametersAddItemRequest
+param12
+ )
+
+ {
+ <b>System.out.println(param12.getPrice());
+ System.out.println(param12.getItemId());
+ System.out.println(param12.getDescription());
+ System.out.println(param12.getItemName());
+
+ MultipleParametersAddItemResponse res =
+ new MultipleParametersAddItemResponse();
+
+ res.setSuccessfulAdd(true);
+ res.setItemId(param12.getItemId());
+
+ return res;</b>
+ }
+
+}</pre>
+</p>
+
+<p>As with generating clients, all these classes, such as
+MultipleParametersAddItemRequest and TwoWayOneParameterEchoResponse, are
+generated by the utility, and can be found in the same directory as the
+skeleton file. They include methods such as setSuccessfulAdd(), which sets
+the value of the content of an element in the response, and getItemName(),
+which retrieves the content of elements in the request.</p>
+
+<p>Save the file and compile it by typing: ant jar.server</p>
+
+<p>If all goes well, you should see the BUILD SUCCESSFUL message in your
+window, and the Axis2UserGuideService.aar file in the newly created build/lib
+directory.</p>
+
+<p><img alt="The BUILD SUCCESSFUL message in your window"
+src="images/fig05.jpg" /></p>
+
+<p>Now you need to deploy the service to the server. To do that, copy the
+Axis2UserGuideService.aar file to the WEB-INF/services directory of the
+application server. (You also have the option to use the administration
+tools. See the <a href="webadminguide.html">Web Administrator's Guide</a> for
+more information.)</p>
+
+<p>To verify that the service has been properly deployed, check the list of
+services at <a
+href="http://<host>:<port>/axis2/services/listServices">http://<host>:<port>/axis2/services/listServices</a>.</p>
+
+<p><img alt="Checking the list of services" src="images/fig06.jpg" /></p>
+
+<p>Now you should be able to access the service using any of the clients
+built in the <a href="userguide-creatingclients.html#generating">Generating
+Clients</a> document.</p>
+
+<p><strong>See Next Section</strong>- <a
+href="userguide-samples.html">Samples</a></p>
+</body>
+</html>
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