Skip site navigation (1) Skip section navigation (2)

RE: [INTERFACES] NOTIFY/LISTEN with JDBC

From: Peter Mount <petermount(at)it(dot)maidstone(dot)gov(dot)uk>
To: "'Martin Kresse'" <mkresse(at)slyde(dot)in-berlin(dot)de>, pgsql-interfaces(at)postgresql(dot)org
Subject: RE: [INTERFACES] NOTIFY/LISTEN with JDBC
Date: 2000-02-10 08:42:51
Message-ID: 1B3D5E532D18D311861A00600865478C70C1A2@exchange1.nt.maidstone.gov.uk (view raw or flat)
Thread:
Lists: pgsql-interfaces
I'll try it. That should work (in theory).

Peter

-- 
Peter Mount
Enterprise Support
Maidstone Borough Council
Any views stated are my own, and not those of Maidstone Borough Council.



-----Original Message-----
From: Martin Kresse [mailto:mkresse(at)slyde(dot)in-berlin(dot)de]
Sent: Thursday, February 10, 2000 8:28 AM
To: pgsql-interfaces(at)postgreSQL(dot)org
Subject: [INTERFACES] NOTIFY/LISTEN with JDBC


Hi there,

I'm writing a database application in Java, which needs to get 
notified about changes in the database. Therefore I'd like to use the 
NOTIFY/LISTEN mechanism, but I can't get it working with JDBC. I 
was told, to use connection.getWarnings() method to retrieve 
notifications, which doesn't seem to work. I'm using PostgreSQL 
6.5.1 with the JDBC-Driver 6.5 for jdk1.1, and the following code 
doesn't produce any output, while a parallel running psql-shell 
displays the notifications...

      Connection c = DriverManager.getConnection(...);
      Statement s = c.createStatement();
      s.execute("LISTEN test");

      while(true) {
        s.execute("NOTIFY test");
        SQLWarning w = c.getWarnings();
        if (w != null)
          System.out.println(w.getMessage());
        try {
          Thread.sleep(2000);
        } catch (InterruptedException ex) {}
      }

Am I doing something wrong?
Thanks a lot for your help,

  Martin Kresse

************

Responses

pgsql-interfaces by date

Next:From: Peter MountDate: 2000-02-10 08:46:23
Subject: RE: [INTERFACES] JDBC primary keys
Previous:From: Martin KresseDate: 2000-02-10 08:28:05
Subject: NOTIFY/LISTEN with JDBC

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group