i cc /r o tc en n oc /c rs / se lp m ax e em o HB JE fo C il Ce e ff oC xo bk ca l bi cc BJ Ee e ff oC ee f fo C

To illustrate how to use a CCI resource adapter, we ve written a session bean and a client of that bean These pieces of code illustrate how clients invoke the different CCI methods that resource adapters built on CCI might make available Our example uses the two sample CCI-specific resource adapters: and c

The interface ( class (

session bean is much like any other session bean It has a home ), a remote interface ( ), and an implementation ) To keep things simple, we ve called the client

Let s start with the session bean interfaces and classes The home interface, , is like any other session bean home interface It extends and defines a method to return a reference to the remote interface

;n oi tp e cx Ee t om eR s w or ht )( tn uo C ee ff oC t eg t n i ci lb u p ;n o it pe cx E et om e R sw or h t )y ti tn a uq t n i ,e ma n g ni r tS (e ef f oC tr es n i di o v ci lb u p

Now let s examine the session bean implementation class to see how it uses the CCI To begin with, notice that imports the CCI interfaces and classes, along with the and the sample classes

n oi t ce nn oC es ab at a D a g ni ni at b O ;* x ob k ca lb i cc r ot c en no c n us m o c tr op m i ; no it pe c xE ec r uo se R e cr uo se r x av a j tr op m i ; * ic c e cr uo se r x av a j tr op m i no it p ec xE ec r uo se R e cr uo s er x av a j e cr uo s er x av a j B JE e ef fo C

Prior to obtaining a database connection, the session bean does some set up work in its method (See the following code example) Specifit x et no C no is se S te s

{ )x e n oi tp e cx Ee cr u os eR ( h ct ac } ; )c ep s( n oi tc e nn oC te g f c = n oc ; ) dr ow ss a p ,r e su (c ep S no it c en no Ci c C we n = ce p s ce pS n oi tc e nn oC { yrt ; l lu n = n oc n o it ce nn o C { ) (n oi tc e nn oC I CC te g n oi tc e nn oC e t av ir p

cally, the method sets the user and password values, and instantiates a These values and objects remain available to the other session bean methods (In this and subsequent code examples, the numbers in the left margin correspond to the explanation that follows the code)

uses its private method to establish a connection to the underlying resource manager or database A client of the session bean cannot invoke this method directly Rather, the session bean uses this method internally to establish a connection to the database The following code uses the CCI to establish a database connection

e ef fo C n oi t ce nn o CI CC te g yr o tc aF no i tc en n oC pu ko ol p uk o ol t x et no Cl a it in I tx et n oC la it i nI