How to use Threading Concept in oracle

Question

Hi all,
I am having requirement such that i have to execute a function after insert of data in one table.due to performance issues i have to execute this function using java pooling.if anybody having idea regarding this one please share.
I have tried by using simple javaThreading but it is not working.
Regards,
Ramesh.

Answer 1

public static void main (String args[] ) throws Exception {
log("main thread is: " + Thread.currentThread());
TaskProcessor taskProcessor[] = new TaskProcessor[5];
Thread threads[] = new Thread[taskProcessor.length];
for (int i=0; i<taskProcessor.length; i++) {
taskProcessor[i] = new TaskProcessor(i);
threads[i] = new Thread(taskProcessor);
threads[i].start();
for (int i=0; i<taskProcessor.length; i++) {
if (threads[i].isAlive()) {
threads[i].join();
* Thread to run many concurrent connections
private static class TaskProcessor implements Runnable {
private int number = 0;
public TaskProcessor(int number) {
this.number = number;
public void run() {
try {
log("Thread started: " + Thread.currentThread());
// Get a connection
Connection conn = ConnectionFactory.getConnection();
// Sleep and yield so that other threads can run
Thread.yield();
//Thread.sleep(1000);
Thread.yield();
Connection conn1 =ConnectionFactory.getConnection();
log("Thread " + Thread.currentThread() + ": First Con: " + conn);
log("Thread " + Thread.currentThread() + ": Second Con: " + conn1);
if (conn1 != conn)
throw new Exception("Connections dont match: " + conn + ": " + conn1);
log("Thread " + Thread.currentThread() + " over");
} catch (Exception e) {
System.out.println("Exception"+e);
private String getLeastLoadedPool() {
if (lastNodePoolUsed == null) {
lastNodePoolUsed = "1";
return "1";
if (lastNodePoolUsed.equals("1")) {
lastNodePoolUsed = "2";
return "2";
else {
lastNodePoolUsed = "1";
return "1";
// in connection factory get connection factory
public synchronized static Connection getConnection() throws Exception {
if (singletonFactory == null)
singletonFactory = new ConnectionFactory();
String poolId = (String) nodePoolTracker.get();
if (poolId == null) {
// one and store it in the thread
poolId = singletonFactory.getLeastLoadedPool();
nodePoolTracker.set(poolId);
log("No Pool Associated:" + Thread.currentThread() + ", adding: " + poolId);
return singletonFactory.getConnection(poolId);
else {
log("Pool Associated:" + Thread.currentThread() + ", " + poolId);
return singletonFactory.getConnection(poolId);
after creating this class by using lodajava i have loaded in oracle.
Regrads,
Ramesh