RE: [INTERFACES] NOTIFY/LISTEN with JDBC

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@slyde.in-berlin.de]
Sent: Thursday, February 10, 2000 8:28 AM
To: pgsql-interfaces@postgreSQL.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

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