基于SLSB的webservice

<o:p> </o:p>接手的项目用到了基于stateless session bean 的webservice，以前没有怎么接触过ws.整理一下自己的学习资料：<o:p>
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• Quick introduction Webservice<o:p></o:p>

HTTP is supported by all Internet browsers and servers. Firewalls and proxy servers will not block this kind of traffic.<o:p>
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1.Soap:Simple Object Access Protocol
2.WSDL:Web Services Description Language
3.UDDI :Universal Description, Discovery, and Integration<o:p>
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应用场合: Reusable application components or connect existing software<o:p>
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目前比较流行的两个Framework:<o:p></o:p>

1. Axis is a an implementation of the SOAP. JBoss 4.0.3 and lower are based on axis.<o:p></o:p>

2. xfire is a next-generation java SOAP framework. Feature: POJO, high performance, spring integration<o:p>
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• SLSB exposed to WS<o:p>
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在In J2EE1.4和EJB2.1规范中为SLSB增加了一种接口: service endpoint interface (SEI).<o:p></o:p>

ejb-jar.xml如下：
<session> </session>

xml 代码

<session >
 <ejb-name>HelloWorld<!---->ejb-name>
 <home> services.ejb.HelloWorldHome<!---->home>
 <remote> services.ejb.HelloWorld<!---->remote>
 <service-endpoint>services.ejb.HelloWorld<!---->service-endpoint>
 <ejb-class> services.ejb.HelloWorldSession<!---->ejb-class>
 <session-type>Stateless<!---->session-type>
 <transaction-type>Container<!---->transaction-type>
 <!---->session>

<transaction-type> </transaction-type>
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一般在J2EE1.4平台上开发时，需要有四个xml文件，分别是:<o:p></o:p>

ejb-jar.xml;
wsdl;
mapping.xml主要用来定义在soap中使用的数据类型定义;
webservice.xml主要定义slsb所使用的mapping文件和wsdl.<o:p>
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可以使用JAX-RPC开发包生成所需要的mapping.xml和wsdl文件,该开发包被包括在jwsdp中可在SUN的网站上下载。目前是支持JDK1.5的JAX-WS.<o:p>
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基于SLSB的webservice的开发真个麻烦呀，又是remote又是bean的,写build.xml时就花了好长时间。不过还好网上有例子，用xdoclet结合axis1.x的java2wsdl命令以及<o:p></o:p>

jwsdb的wscompile命令基本可以搞定。<o:p>
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听说EJB3.0遵循JSR181的annotations，呵呵，那样stateless session bean就可以非常方便的发布为WS了，还不用强制remote <o:p>
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build.xml部分：

<target name="wsdeploy" depends="wsee"><exec executable="F:/Sun/jwsdp-1.5/jaxrpc/bin/wscompile.bat"><arg line="-verbose"><arg line="-cp ${buildDir}"><arg line="-gen:server"><arg line="-nd ${buildDir}/META-INF/wsdl"><arg line="-d ${srcDir}"><arg line="-mapping ${buildDir}/META-INF/jaxrpc-mapping.xml"> </arg></arg></arg></arg></arg></arg></exec></target>

xml 代码

<!---->
<taskdef resource="axis-tasks.properties" classpathref="classpath" />
<!---->
<target name="ejbdoclet">
 <taskdef classname="xdoclet.modules.ejb.EjbDocletTask" classpathref="xdoclet.classpath"
 name="ejbdoclet" />
 <ejbdoclet ejbSpec="2.1" destDir="${srcDir}">
 <fileset dir="${srcDir}" includes="services/ejb/HelloWorldBean.java" />
 <homeinterface />
 <remoteinterface />
 <service-endpoint />
 <utilobject includeGUID="true" />
 <deploymentdescriptor destdir="${buildDir}/META-INF" validatexml="true"
MergeDir="fake-to-debug" />
<jboss version="4.0" unauthenticatedPrincipal="nobody" xmlencoding="UTF-8"
destdir="${buildDir}/META-INF" validatexml="true" generateRelations="no" preferredrelationmapping="relation-table" />
<!---->ejbdoclet>
<!---->target>
<!---->
<target name="wsee">
<taskdef classpathref="xdoclet.classpath" classname="xdoclet.modules.wsee.WseeDocletTask"
name="wseedoclet" />
 <wseedoclet jaxrpcMappingFile="mappings.xml" wsdlFile="HelloWorldService.wsdl"
destDir="${buildDir}" force="true" verbose="true">
 <fileset dir="${srcDir}" includes="**/HelloWorldBean.java" />
 <deploymentdescriptor>
 <configParam name="Name" value="HelloWorldAxisService" />
 <!---->deploymentdescriptor>
 <!---->wseedoclet>
 <replace file="${buildDir}/webservices.xml" token="WEB-INF/HelloWorldService.wsdl"
value="META-INF/wsdl/HelloWorldService.wsdl" />
 <replace file="${buildDir}/webservices.xml" token="WEB-INF/mappings.xml"
value="META-INF/jaxrpc-mapping.xml" />
 <!---->target>

<!---->
<target name="wsdeploy" depends="wsee">
 <exec executable="F:/Sun/jwsdp-1.5/jaxrpc/bin/wscompile.bat">
 <arg line="-verbose" />
 <arg line="-cp ${buildDir}" />
 <arg line="-gen:server" />
 <arg line="-nd ${buildDir}/META-INF/wsdl" />
 <arg line="-d ${srcDir}" />
 <arg line="-mapping ${buildDir}/META-INF/jaxrpc-mapping.xml" />
 <arg line="${srcDir}/resource/wsconfig.xml" />
 <!---->exec>
<!---->target>

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