Interface Helloworld.java
Package Jcuckoo; Public interface HelloWorld {public string SayHello (string name);}
Interface Other.java
Package Jcuckoo; Public interface Other {public String sayme ();}
Local interface Helloworldlocal.java
Package Jcuckoo; Public interface helloworldlocal extends helloworld{}
Implement class Otherbean.java
Package Jcuckoo.impl; Import javax.ejb.Local; Import javax.ejb.Stateless; Import Jcuckoo.other; @Stateless @Local (Other.class)//The default annotation is the local public class Otherbean implements the other {public String Sayme () {R Eturn "Other"; } }
Implement class Helloworldbean.java
Method One: Lookup implementation through Jndi call another bean
@Stateless//without the following Remote and local annotations, the default is the local @Remote (Helloworld.class) @Local (helloworldlocal.class) public class helloworldbean implements helloworld,helloworldlocal { public string sayhello (string name) { //Lookup via Jndi try { initialcontext ctx = new initialcontext (); other other= (Other) ctx.lookup (" Otherbean/local "); return name+ "said: Hello," +other.sayMe () ; } catch (namingexception e) { e.printstackTrace (); } return Null  } Method Two: Calling another bean through an EJB annotation implementation
@Stateless//without the following Remote and local annotations, the default is local @Remote (helloworld.class) @Local (helloworldlocal.class) public class Helloworldbean implements Helloworld,helloworldlocal {//@EJB other other;//lookup by injection///If two of the same type of other is found when injected, it will be reported Wrong. This is the time to specify the corresponding beanname, so even if there are multiple classes to implement the other interface, there will be no problem @EJB (beanname= "Otherbean") other; Public String SayHello (string name) {return name+ said: "Hello," +other.sayme (); }} Other Annotations:
Timerservice is a known service in EJB3 and can be annotated with resource
@Resource Timerservice Timerservice;
Specifies that the data source is also annotated by resource and that the corresponding Jndi name is specified through the parameter mappedname
@Resource (mappedname= "") DataSource DataSource;
published, there are several ways to use Ant publishing here:
<?xml version= "1.0" encoding= "UTF-8"?> <project basedir= "." name= "Ejbtest" > <property name= "Src.dir" value= "${basedir}/" src "/> <property environment=" env "/> <property name= "Jboss.home" value= "${env. Jboss_home} "/> <property name=" jboss.server.config " value=" Default "/ > <property name= "Build.dir" value= "${basedir}/build"/> <path id= "Build.classpath" > <fileset dir= "${jboss.home}/client" > < Include name= "*.jar"/> </fileset> <pathelement location= "${build.dir}"/> </path> <target name= "Prepare" > <delete dir= "${build.dir}"/> <mkdir dir= "${ Build.dir} "/> </target> <target name=" Complie " depends= "Prepare" description= "compiling" > <javac srcdir= "${src.dir}" destdir= "${build.dir}" > <classpath refid= "Build.classpath"/> </javac> </target> <target name= "Ejbjar" depends= "Complie" description= "Create EJB Publishing Package" > <jar destfile= "${basedir}/${ant.project.name}.jar" > <fileset dir= "${build.dir}" > <include name= "**/*.class"/> </fileset> </jar> </target> <target name= "Deploy" depends= "Ejbjar" description= "Publish EJB" > <copy file= "${basedir}/${ant.project.name}.jar" todir= "${jboss.home}/server/${jboss.server.config}/deploy "></copy> </target> <target name=" Undeplay " description=" Uninstall EJB "> <delete file=" ${ Jboss.home}/server/${jboss.server.config}/deploy/${ant.project.name}.jar "></delete> </target> ≪/project>
start the JBoss server.
Next build the client Ejbclient.java
package jcuckoo.client; import jcuckoo.helloworld; import javax.naming.initialcontext; import javax.naming.namingexception; public class ejbclient { public static void main (String[) args) { try { initialcontext ctx=new initialcontext (); helloworld helloworld= (HelloWorld ) Ctx.lookup ("Helloworldbean/remote"); system.out.println (Helloworld.sayHello ("Remote Wheat")); } catch (namingexception e) { system.out.println (E.getMessage ()); } &NBSP}}, you can see the corresponding result:
Remote wheat said: Hello, other
