J2EE - Basic

Mehr dazu

Water Cycle

von Gina Hale

Shunra/Cloud

von Benny Daon

Celestial Family Tree

von Eric Beer

FELICIDAD

von valentina corredor

J2EE

Memory Leakage

JProbe

Pay attention to those lead area

Event Listener class

Member variable not set to Null

Static Class

EJB3

JNDI

Naming Context: All name in java:comp/env

Resource Manager Type

Connection Factory Type

JNDI Subcontext

JDBC

javax.sql.DataSource

java:comp/env/jdbc

JMS

javax.jms.TopicConnectionFactory

javax.jms.QueueConnectionFactory

java:comp/env/jms

JavaMail

javax.mail.Session

java:comp/env/mail

URL

java.net.URL

java:comp/env/url

Connector

javax.resource.cci.ConnectionFactory

java:comp/env/eis

JAXR Resource Adapter

javax.xml.registry.ConnectionFactory

java:comp/env/eis/JAXR

Archieve to .jar

-com

-classes

-META-INF

-MANIFEST.MF

Eclipse

Ant

<?xml version="1.0"?>

<project name="jartest" default="jar basedir=".">

<property name="build.dir" value="${basedir}/build" />

<property name="build.classes.dir" value="${basedir}/classes" />

<target name="jar" description="Archieve to jar">

<jar jarfile="${basedir}/ejbfile.jar">

Annotation

BeanStructure

Package

META-INF

ejb-jar.xml (Deployment Descriptor)

Can use annotation instead!

MessageDrivenBean

EJB Managed - MessageListener

Handle JMS

EntityBean

JDBC+JavaBean

OR Mapping

SessionBean

Interceptor(@AroundInvoke)

InvocationContext

Local

Remote

Stateful

Stateless

Life-Cycle

newInstance()

JBoss

Object Container

Collection

Set

TreeSet

HashSet

No Duplicate

List

LinkedList

removeLast()

removeFirst()

getLast()

getFirst()

addLast()

addFirst()

More transaction..

ArrayList

list.size()

list.add()

list.get()

Iterator iterator = list.iterator();

while(iterator.hasNext())

List list = new ArrayList();

Ordering

Map

TreeMap

HashMap

Map map = new HashMap();