I have some actual source code to share for the EJB Example:
Thanks someone for putting my EJB tip in the document ;o>
Here is some actual sample code though. :
public class BasicTestInterceptor extends DbEventInterceptorSupport
{
static Category log =
Category.getInstance(BasicTestInterceptor.class.getName());
/**
* Checks to see if a number is in range inclusively given three Strings.
* @param check String representing a number.
* @param low String representing the low number of the range.
* @param high String representing the high number of the range
* @param inclusive set to true if you want the low <= check and check <= high
.
* @param digits the number in digits to the left of the decimal to round.
positive, non-zero int
* @return value converted to a string.
* @throws ValidationException when encountering other exceptions like
NumberFormatException.
*
*/
public static boolean inRange(String check, String low, String high, boolean
inclusive)
throws ValidationException
{
try
{
NumericValidationLocal numericValidation =
EjbUtil.getNumericValdiationBean();
if(numericValidation==null)
{
System.out.println("Null numericValidation");
return false;
}
return numericValidation.inRange(check,low,high,inclusive);
}
catch(MathException me)
{
throw new ValidationException(me.getMessage());
}
catch(Exception e)
{
throw new ValidationException("");
}
}//inRange(...)
...
}//BasicTestInterceptor
package com.atser.sejb.math;
public interface NumericValidationLocal
extends javax.ejb.EJBLocalObject
{
/**
* Checks to see if a number is in range.
* Range is inclusive given three Strings.
* @param check String representing a number.
* @param low String representing the low number of the range.
* @param high String representing the high number of the range
* @param inclusive set to true
if you want the low <= check and check <= high .
* @param digits the number in digits to the
left of the decimal to round. positive, non-zero integer only. For
example: 1438 with 1 passed in will give us 1440.
* @return value converted to a string.
* @throws ValidationException for any number format problems.
*/
public boolean inRange(
String check,
String low,
String high,
boolean inclusive
)
throws MathException;
}//NumericValidationLocal
package com.atser.sejb.math;
public interface NumericValidationLocalHome
extends javax.ejb.EJBLocalHome
{
NumericValidationLocal create() throws javax.ejb.CreateException;
}//NumericValidationLocal
import javax.ejb.*;//SessionContext
import org.apache.log4j.*;//Category
public class NumericValidationStatelessBean
implements javax.ejb.SessionBean
{
private static Category log =
Category.getInstance("NumericValidationStatefulBean");
private javax.ejb.SessionContext ctx;
/**
* Provides generic range checking.
* Checks to see if a number is in range.
* Range is inclusive given three Strings.
* and returns true if in range or false if out of
* specified range.
*/
public static boolean inRange(String check,
String low, String high, boolean inclusive)
throws MathException
{
try
{
double c = Double.parseDouble(check);
double l = Double.parseDouble(low);
double h = Double.parseDouble(high);
if(inclusive)
return (l<=c && c<=h);
else
return (l<c && c<h);
}
catch(NumberFormatException nfe)
{
throw new MathException("Invalid arguements to method:
inRange(String check, String low, String high, boolean
inclusive):"+check+","+low+","+high+","+inclusive);
}
}//inRange(...)
public void ejbCreate()
{
log.debug("ejbCreate()");
}//ejbCreate()
public void ejbRemove()
{
log.debug("ejbRemove()");
}//ejbRemove()
public void ejbActivate()
{
log.debug("ejbActivate()");
}//ejbActivate()
public void ejbPassivate()
{
log.debug("ejbPassivate()");
}//ejbPassivate()
public void setSessionContext(javax.ejb.SessionContext ctx)
{
this.ctx = ctx;
log.debug("setSessionContext(..)");
return;
}//setSessionContext(..)
}//NumericValidationStatefulBean
jboss.xml
<?xml version="1.0" encoding="UTF-8"?>
<jboss>
<enterprise-beans>
<session>
<ejb-name>com/atser/sejb/math/NumericValidation</ejb-name>
<jndi-name>com/atser/sejb/math/NumericValidation</jndi-name>
</session>
</enterprise-beans>
</jboss>
ejb-jar.xml
<!DOCTYPE ejb-jar
PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN'
'http://java.sun.com/j2ee/dtds/ejb-jar_2_0.dtd'>
<ejb-jar>
<enterprise-beans>
<session>
<!-- The JNDI name of the bean. -->
<ejb-name>com/atser/sejb/math/NumericValidation</ejb-name>
<!-- Class configuration for the bean -->
<local-home>com.atser.sejb.math.NumericValidationLocalHome</local-home>
<local>com.atser.sejb.math.NumericValidationLocal</local>
<ejb-class>com.atser.sejb.math.NumericValidationStatelessBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
</ejb-jar>
web.xml
<ejb-local-ref>
<ejb-ref-name>ejb/NumericValidation</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<local-home>com.atser.sejb.math.NumericValidationLocalHome</local-home>
<local>com.atser.sejb.math.NumericValidationLocal</local>
<ejb-link>com/atser/sejb/math/NumericValidation</ejb-link>
</ejb-local-ref>
making sure you have
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd";>
in application.xml, make sure you have the jar you compiled
do not play with jndi.properties.
don't need jboss-web.xml
tested on JBoss 3.0.0-Tomcat 4.0.6
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