有状态会话Bean实验指导

1、开发ejb2.x的有状态会话bean步龙新建名为countbean的j2ee1.4工程。l new冈1世 i zards：a$ plug-in project0 product configuration + 3 cvs & ejb 3. 0 l_、hibernate d & jbossaop-g jboss-ide+ descriptorsi* lr ejb componentsj2ee 14 project (_* j2ee projects ce j2ee 1.3 project 3+web components(*web servicesrcancel设置工程的源程序h

2、录为src,冃的冃录output为bin。步骤2：在新建向导中，选择 jbosside i ejb components i session bean 创建会话 bean。g* jboss-ide迢kg descriptors l_ ejb componentsg ejb t*xt client qf entity beanmessage drivengg& j2ee projects wtb components3 web rvicesbean*e三 jboss jbpmjboss seaniwizards：otherp plugrin d«v*lopa«nt3

3、simple< backnext >cancel设置session bean的各种参数,点击finish按钮，即可看到生成的ejb类框架代码。& ke< session beansession beancreate session beansource folder： |countbean/srcbrowsep ackage:countbrcwsena®e：superclass：interfaces：coun tbeani java lan;. objecto jeivax. ejb sessionbeanselect the type of the ejb

4、stateless 庁 statefnlselect the access of the ejb2 remote local ' bothwhich method stubs would you like to create?constructors £ro» superclass 0 inherited abstract methodsv >jbcreate 0 metho电< backfini shcancel其屮各参数解释如f：source folder：源程序所在h录;package:源程序的包名； name： session bean 类的类名

5、；superclass 和 interfaces：取默认值即可；select the type of the ejb：选择 ejb 的类型；select the access of the ejb：选择 ejb 的接口类型,会话 bean 通常是 remote 接口 ；which method stubs would you like to create? : ejb 类要实现的方法，应选择 inherited abstract methods和ejbcreate() method牛命周期方法。步骤4：在package explorer中，利用ejb类的右键菜单添加商务方法。j package

6、 expl. . . x =二ji ©u- b? conntbeanw 0 src-田 count-(jj countb«w. j tvt-|j i countbean. java l _countbe,1 seri new砥 ejba ejbc tjbp仏 ejbbqejh bgn name = mcountdisplay-name-naroe for count” description=description for coui jndi-name=rfejb/countrf tvpe=,statef ul,r mote,ropenopen withopen type

7、hier&rchyf3f4elements sessionbeanq, sets* hiijre system librai £opy* bifc j2ee 1.4 librairi< paste* vtb s«rvi cts 1 0 w n .x deletebuild pathsourcerefactorctrlfcctrl+vdeletealt+shift+s alt+shift+t long serial vers i on ui1iconcext(sessionconterated method stubimp or t.u export.j2eea

8、dd cmr relationshipreferencesadd cmp fieldadd select methodctrl+shi£t+u add hooe methodadd create methoddeclarationsoccxirrerices in file；refreshadd busir|ss method 设置business方法的参数。method name： |courttc nev ejb business methodejb business methodcreate a new ejb business methodselect the view ty

9、pe to useremotelocal ' bothcancelfini sh完整的countbean.java代码如下: package count;import java.rmi.remoteexception; import javax.ejb.ejbexception;import javax.ejb.sessionbean; import javax.ejb.sessioncontext;import javax.ejb.createexception;public class countbean implements sessionbean public int val;

10、public void setsessioncontext(sessioncontext ctx)throws ejbexception,remoteexception / todo auto-generated method stub system.oulprintln(hsetsessioncontext()n);public void ejbremove() throws ejbexception, remoteexception / todo auto-generated method stubsystem.oulprintln(ftejbremove()fl);public void

11、 ejbactivate() throws ejbexception, remoteexception / todo auto-generated method stubsystem .outprin tln( *' ej b a c ti vate()h);ipublic void ejbpassivate() throws ejbexception, remoteexception / todo auto-generated method stubsystem.oulprintln(hejbpassivaten);public void ejbcreate(int val) thr

12、ows createexception / todo auto-generated method stub this>val=val;sy stem.out.println( *' ej bcrea te()h);public int count() / todo auto-generated method stub system.oulprintln(ncount()h);return +val;步骤6 ：分别建立对应于remote接口和home接口的java接口文件。remote接口代码如下:package count;import javax.ejb.ejbobject;i

13、mport java>rmi>remoteexception;public interface count extends ejbobjectpublic int count() throws remoteexception;home接口的代码如下：package count;import javax.cjb.ejbhomc;import javax.ejb>createexception;import java.rmi.remoteexception;public interface counthome extends ejbhomepublic count create(

14、int val)throws createexceptionremoteexception;结构如下：: package expl. . .»a f=jbe o应-courttbean白srccoun t+ j coutlt. java+ jj coutltbgan.jwa+ jjj count home, java+ 吕i jre system library juki. 5 + 或i j2ee 1.4 libraries (jboss- + 旦，web services 1.0 libraries步骤7：在工程下建立count子目录，作为没有打包的ejb模块。在count子目录下

15、，再新建 count目录。c hew folderfoldercreate a new folder resource.£nter or select the piirent folder： |countb«in/count-icz countbean -&bin 0 countcountb & srccountfolder name: countadvanced >>finishcancel把bin目录中自动编译生成的class文件导入到count子目录下。步骤9：在count子目录下建立meta-inf子目录，并建立ejb-jar.xml和j

16、boss.xml配置文 件。ejb-jar.xml代码如下：<?xml version=nlon encoding=mutf-8n?><ejb-jar version=tt2.r,xmlns=h xmlns:xsi=n/2001/xmlschema-instancen xsi:schemalocation=9vhttp:/java«sunxom/xinl/ns/j2eehttp:/java<sun<com/xml/ns/j2ee/ejb-jar_2_lxsdn><enterprise-beans><

17、session><ejb-name>count</ejb-name><home>count.counthome</home> <remote>counlcount</remote> <ejb-class>count.countbean</ejb-class> <session-type>stateful</session-type> <transaction-type>container</transaction-type> </sessi

18、on></enterprise-beans></ejb-jar>jboss.xml 代码如 f：<?xml version=n1.0n encoding二"utf8"?><jboss><enterprise-beans><session><ejb ame>count</ejb-name><jndi-name>count</jndi-name></session></enterprise-beans></jboss>

19、步骤 10：在项目 countbean 下建立一个 ant 的 xml 文件 packaging-build.xmlo在packaging-build.xml的右键菜单上执行ant命令，打包生成jar文件。run ass 1ant buildalt+shi £t+x, qdebug as探2ant duild.teampackaging-build.xml 代码如下：<?xml version'1.0" encoding=mutf-8n?><project name二"packaging generator0 default=n_pack

20、aging_generation_n> <target name=h_packaging_generation_h depends=hn65540f7><target name=hn65540n description=ttvveblwar,t><jar destfile="count.jarh><zipfileset dir='*count* 7> </jar> </target></project>压缩完成提示信息如下:lproblemsjavadocdeclaration<t

21、erminated> countbean packaging-build, xml ant build c：javajdkl. 5. 0_09binjbuildfile : f : workspace countbean packacrincy-build, xml n65540:flari building jar: f:workspacecountbeancount.jar incf_cf 已 n皂iun_:build successfultotal time: 2 seconds目录结构如下图:=pckae explorer xerarpackagi ngrbui 1 d xal1

22、1启动jboss服务器，显示界面如下:-ry countboon-(d? srcm ® count-因 count j ava h o count0 count 0-j countbean java 耳 g countbcani olvorzi onlltdo val0 count 0& ejbactivateo ejbcreate (string)0 jbfwi"toq. ejbremove ()龟 setsessioncontext (sessioncontext) -血 counthome j ava-o counthonie0 create (ini)jre

23、 systw library jdk1 5j2ee 1.4 libraries (jboss-ide)yab services 1 0 librari«x (jboxxide)countcounttcount, classcountbesrl class血 countmonft. class-heta-ikfx ejb-j&r. x1x jbozx. xnl13:01:49,703 13:01:49,703 13:01:49,718 13:01:49,796 13:01:50,031 13:01:50,781 13:01:50,984 13:01:52,468 13：01:s

24、3,109 13:01:s3,140 13:01:53,203infoinfoinfoinfoinfoinfoinfoinfoinfo infoinfo57,281info57,359info57,609info59,328info59,578info00,890warn01,812info02,640info02,703info02,750info3,687info44,687info44,703infoproblems javadoc declaration'| £| y i e! 03 - cn ojboss jboss 4.0.x c:javajdkl. 5. 0_0

25、9binjavaw. exe (2007t0-27 12:59:02)securedtopic bound to jndi name: topic/securedtopictestdurabletopic bound to jndi name: topic/testdurabletopictestqueue bound to jndi name: queue/testqueueuilserverilservice jbossmq uil service available at : /0.000:8093dlq bound to jndi name: queue/dlqconnectionfa

26、ctorybindingservice bound connectionhanager 'jbossjca:ionfact) tomcatdeployer deploy, ctxpath=/jmx-console, warurl=. . ./deploy/jmx-consolew&i:/httpllbaseprotocol starting coyote http/11 on http-0000-8080channeisocket jk: ajpl3 listening on /0000:8009jkhain jk running id=0 time=0/203 config=

27、nullserver jboss (hx hicrokernel) 4.0.4.ga (build: cvst&g=jboss 4 0 4 ga d&te=2oo6o5151ooo)>r把打包工成的count.jar文件拷贝到c:jboss404gaserverdefaultdeploy路径下（不同机器，安装路径不同），jboss服务器如呆成功部署该count m件，则显示如下所示信息:problems javadoc declaration 旦 console s3 、画冷cl專！jboss jboss 4.0.x c：javajdkl. 5. 0 09binjavaw

28、. exe (2007-10-29 11:57:45)testqueue bound to jndi name: queue/testqueueuilserverilservice jbossmq uil service available at : /:8093dlq bound to jndi name: queue/dlqconnectionfactorybindingservice bound connectionmanager 1jboss.jca:service=coi tomcatdeployer deploy, ctxpath=/jmx-console, waru

29、r1=./deploy/jmx-console.vai maindeployer undeploy 1 file:/c:/jboss-40 4ga/server/default/deploy/count.jai httpllbaseprotocol starting coyote http/1.1 on http--8080channeisocket jk: ajpl3 listening on /:8009jkmain jk running id=0 time=0/391 config=nullserver jboss (mx microkernel) 4.0.4

30、.ga (build: cvstag=jboss_4_0_4_ga date=20c ejbmodule deploying countproxyfactory bound ejb hoine 1 count1 to jndi 1 count1ejbdeployerl deployed: file:/c:/iboss-4.0.4.ga/server/default/deploy/count.jar步翡12：在新建向导中，利用向导jboss-ide i ejb test client建立ejb客户机程序。next >firn shcancel 13设置ejb客户机的各种参数。 ne<

31、®lwizards：+hibernatezk l二 java & jbossaopf-3 jboss-ide+ g* descrip tors- g* ejb components gbsen g entity b«tng message driven bean g session beanj2ee projects d web components g* w*b s«rvic«sh 二< 3 jboss jbpm彳jboss seam 7客户机代码如2package count;import junit.framework.testcas

32、e;import java.util.hashtable;import javax.rmi.portableremoteobject;import javax.naming.context;import javax.naming .initialcontext;public class testcount extends testcase public testcount() super();protected count.counthome home;protected context getinitialcontext() throws exception hashtable props

33、= new hashtable();props.put(context.initial_context_factory,herfaces.namingcontextfactoryh);props.put(context.url_pkg_prefixes,norg.jboss.naming:erfacesn);props.put(context.provider_url, "jnp:/localhost: 1099");context ctx = new initialcontext(props);return ctx;protec

34、ted count.counthome gethome() throws exception context ctx = this.getinitialcontext();object o = ctxjookup(hcountm);count.counthome intf = (count.counthome) portableremoteobject.narrow(o,count.counthome.class); return intf;protected void setup() throws exception this.home = this.gethome();public voi

35、d testcount()trycount count=new count5;int countval=0;system.out>println(,instantiating beansfor(int i=0;i<5;i+)counti=this.home.create(countval);countval=counti<count();system.outprintln(countval);thread.sleep(500);system.outprintln(hcalling count() on beans ");for(int i=0;i<5;i+)countval=countixount();system.out<println(countval);thread.sleep(500);for(int i=0;i<5;i+)counti>remove();catch(exception e)e.printstacktrace();14：运行客户机程序testcount.java0|run asju 1 junit plug-in testalt+shift+x, fdebug asik 2 jvni t testalt+shi£