What should be done when client.connect() failed?

Question

Hi guys,
I am using JCO to connect backend System. If client.connect() is called and for certain reason failed, what should I do to roll back the action so that the system keeps normal. I think client.disconnect is not the solution, because connect is not successful. I encountered this problem, and my portal is totally down, what should I do to avoid this situaltion?
My code is
try{
          client.connect();
catch (JCO.Exception e){
//WHAT SHOULD BE DONE HERE?
     System.exit(1);
Thanks in advance!
Regards,
Liying

Answer 1

Hi,
Can you try this code.
class JCOConnector {
private JCO.Client mConnection = null;
  // loginParams will settings for connection
  public static boolean connect(Properties loginParams) {
  boolean returnCode = false;
          try {
               mConnection = JCO.createClient(loginParams);                              
               long timeBeforeConnecting = System.currentTimeMillis();
               mConnection.connect();
               long timeAfterConnection = System.currentTimeMillis();                              
               returnCode = true;
          } catch (Exception e) {
               try {
                    disconnect();
               } catch (Exception e2) {
               throw new RuntimeException(e);
          return returnCode;
      * To Disconnect from the middleware.
     public static boolean disconnect() {
          boolean returnCode = false;
          if (mConnection != null) { // if connection exists
               try {
                    mConnection.disconnect();     // disconnect from the middleware
                    returnCode = true;
               }catch (Exception e2) {
               }finally {
                    mConnection = null;               
          }else{               
               returnCode = true;
          return returnCode;     
Regards,
Ashwani