86 lines
2.3 KiB
Java
86 lines
2.3 KiB
Java
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Equalizer bean
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package com.ack.j2ee.ejb.session;
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import java.rmi.RemoteException;
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import javax.ejb.CreateException;
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import javax.ejb.EJBException;
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import javax.ejb.RemoveException;
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import javax.ejb.SessionBean;
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import javax.ejb.SessionContext;
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import javax.naming.InitialContext;
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import javax.naming.NamingException;
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import javax.rmi.PortableRemoteObject;
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/**
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*
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<session>
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<display-name>Equalizer</display-name>
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...
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<ejb-ref>
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<description>one the top CIA informers</description>
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<ejb-ref-name>cia/grass</ejb-ref-name>
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<ejb-ref-type>Session</ejb-ref-type>
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<home>com.ack.j2ee.ejb.session.EqualizerHome</home>
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<remote>com.ack.j2ee.ejb.session.Equalizer</remote>
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<ejb-link>Equalizer</ejb-link>
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</ejb-ref>
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</session>
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*/
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public class EqualizerBean implements SessionBean {
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private SessionContext sessionContext;
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public String getTimeOfHit() throws RemoteException {
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Informer informer = null;
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try {
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InitialContext ctx = new InitialContext();
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// note that by making the Informer session bean an ejb link,
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// it can be accessed from within its naming environment,
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// that is 'java:comp/env' by using the name specified
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// within its deployment descriptor, that is 'cia/grass'
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Object ejbObject = ctx.lookup( "java:comp/env/cia/grass" );
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// then its business as usual once we have the ejbObject
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InformerHome home = (InformerHome) PortableRemoteObject.
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narrow( ejbObject, InformerHome.class );
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informer = home.create();
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return "Assassination Time: " + informer.getTheTime();
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}
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catch( NamingException nex ) {
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throw new EJBException( "cannot find informer", nex );
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}
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catch( CreateException cex ) {
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throw new EJBException( "problem getting informed", cex );
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}
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finally {
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if( informer != null ) {
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try {
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informer.remove();
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}
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catch( RemoveException rex ) {
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throw new EJBException( "problem getting rid of informer", rex );
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}
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}
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}
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}
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public void ejbCreate() throws CreateException {
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}
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public void ejbRemove() {
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}
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public void ejbActivate() {
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}
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public void ejbPassivate() {
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}
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public void setSessionContext( SessionContext sessionContext ) {
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this.sessionContext = sessionContext;
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}
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}
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