In this example we use the @Resource annotation to inject a

javax.sql.DataSource

into

our

bean.

The

trickiest

thing

about

injecting

a

DataSource

is

not

declaring

the

annotation,

but

actually

configuring

the

data

source.

In

OpenEJB

the

rules

are

quite

simple.

An

declaration

like

the

following

in

code:

@Resource DataSource customerDataSource;

Matches

a

data

source

declared

as

follows

in

the

openejb.xml

file:

<Resource type="DataSource" id="customerDataSource">
 ....
</Resource>

As

seen

in

this

example,

the

data

source

can

also

be

declared

via

properties

as

follows:

customerDataSource = new://Resource?type=DataSource

This

style

of

properties

creation

can

be

used

in

the

InitialContext

properties,

set

into

the

System

properties,

or

passed

in

on

the

command

line

as

vm

properties.

The

source

for

this

example

is

in

the

"injection-of-datasource"

directory

located

in

the

openejb-examples.zip

available

on

the

download

page.