72 lines
1.9 KiB
Java
72 lines
1.9 KiB
Java
Informer bean
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package com.ack.j2ee.ejb.session;
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import javax.ejb.CreateException;
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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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/**
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* Define environment variables within the a components
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* deployment descriptor (e.g. ejb-jar.xml )
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*
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<session>
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...
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<env-entry>
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<description>
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determines whether date time output
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should be the long or short form
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</description>
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<env-entry-name>useLongDateFormat</env-entry-name>
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<env-entry-type>java.lang.Boolean</env-entry-type>
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<env-entry-value>true</env-entry-value>
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</env-entry>
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</session>
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*/
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public class InformerBean implements SessionBean {
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private SessionContext sessionContext;
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private Calendar cal;
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private DateFormat formatter;
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public void ejbCreate() throws CreateException {
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cal = Calendar.getInstance();
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try {
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setup();
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}
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catch( Exception ex ) {
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throw new CreateException( ex.getMessage() );
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}
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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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public String getTheTime() {
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return formatter.format( cal.getTime() );
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}
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// demonstrates how to read an environment variable declared within
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// the deployment descriptor of this component
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private void setup() throws NamingException {
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InitialContext ctx = new InitialContext();
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Boolean b = (Boolean) ctx.lookup( "java:comp/env/useLongDateFormat" );
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int style = ( b.booleanValue() ) ? DateFormat.LONG : DateFormat.SHORT;
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formatter = SimpleDateFormat.getDateTimeInstance( style, style );
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}
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}
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