Re: Connecting to NOTIFY with telnet

Christoph,

On Sat, May 4, 2019 at 10:44 AM Christoph Moench-Tegeder <cmt@burggraben.net> wrote:

## Igal Sapir (igal@lucee.org):

> My main "issue" is that the official pgjdbc driver does not support the
> notifications with listen and I was trying to figure out why.

https://jdbc.postgresql.org/documentation/head/listennotify.html

I should have been more explicit.  My main issue is with the following statement from the link that you posted:

> A key limitation of the JDBC driver is that it cannot receive asynchronous notifications and must poll the backend to check if any notifications were issued

Polling is much less efficient than event handling and I'm sure that there's a major performance hit with that.

                // If this thread is the only one that uses the connection, a timeout can be used to
                // receive notifications immediately:
                // org.postgresql.PGNotification notifications[] = pgconn.getNotifications(10000);