Java stored proc

Question

hi i just now learnt how to write a
simple java proc
load java class
publish
call the function
but how is this used by java people?
for example.......
i have a java class and inside it i have a method that accepts an input parameter.
the input parameter is like below
i have a table ... and a trigger on it when ever new insert/update takes place i have to pass the newly updated value for the column to the java program as the parameter so that they can process with that data
how to achieve this
any material that i can study for this ?
raj

Answer 1

this is what is written in the mail for me
1. write java class with a method to call the refresh code. (cache)
2. load this into oracle using loadjava as a oracle procedure.
3. create a trigger after insert/update/delete on the table in question.
4. call the java method in the trigger
Java class--->
HttpCallout.java (attached)
Loading into Oracle as a procedure.--->
loadjava -thin -verbose -user user/pass@DB HttpCallout.java
create the trigger & call the java method--->
JWCache.sql (attached)
programs 1 thats attached to the file .............................................
// Packages for http client library
import HTTPClient.HTTPResponse;
import HTTPClient.HTTPConnection;
* This java stored procedure is attached as trigger to product_information
* table. Any changes to the product_information table results in invocation of
* this stored procedure which in turn call a JSP to invalidate the web object
* cache that caches the product information
public class HttpCallout {
* This method establishes a http connection with the specified url
public static void getURL( String hostname, String portnum, String url ) throws InterruptedException{
try {
// Process arguments
String protocol = "http";
String host = hostname;
int port = Integer.parseInt(portnum);
String page = url;
// Grab HTTPConnection
HTTPConnection con = new HTTPConnection( protocol, host, port);
con.setTimeout(20000);
con.setAllowUserInteraction(false);
// Issue Get call
HTTPResponse rsp = con.Get(page);
// Terminate the connection
con.stop();
} catch( Throwable ex ) {
ex.printStackTrace();
another program tats atached to file
Rem This SQL Script publishes the java stored procedure to the database
Rem and creates a trigger for invoking the java stored procedure
Rem
CREATE OR REPLACE PROCEDURE getURL( p1 IN VARCHAR2,
p2 IN VARCHAR2,
p3 IN VARCHAR2) AS
LANGUAGE JAVA NAME 'HttpCallout.getURL(java.lang.String, java.lang.String, java.lang.String)';
CREATE OR REPLACE TRIGGER callout_trig AFTER INSERT OR DELETE OR UPDATE
ON product_information
BEGIN
getURL('<server-host-name>:<port>','/jwcache/productinfo/JDBCInv.jsp');
END;
/