Re: [Koha-zebra] Perl Zoom Persistent Connections

[Thomas D]

PHP/YAZ was not written to use Zoom.  PHP/YAZ has persistent connections.

Persistent connections are kept alive continuously and should not require
reinitialisation of a new connection for each query, nor should they time
out arbitrarily when the server determines your connection is inactive or
becomes 'tired' of serving more results.

yaz_connect() parameter options include persistent.

This seems ussefull except for the problem of closing a persistent connection.

"persistent"

"    A boolean. If TRUE the connection is persistent; If FALSE the
connection is not persistent. By default connections are persistent."

"        Note: If you open a persistent connection, you won't be able to
close it later with yaz_close()."

Yaz_connect. PHP manual. The PHP Group. 2005.
http://www.php.net/manual/en/function.yaz-connect.php .


Thomas D


Quoting Mike Taylor <address@hidden> :
> ---------------- Beginning of the original message ------------------
> 
> > Date: Fri, 19 Aug 2005 17:31:07 +0200
> > From: Thomas D <address@hidden>
> >
> > Will the forthcoming Perl bindings for Zoom support
> persistent
> > Z39.50 connections?
> 
> Of course -- that is the only kind of Z39.50 connection. 
> Z39.50 is
> not stateless like HTTP: all communication is of the form
> 
>       open a connection
>       while you're still interested {
>               send a request
>               wait for the response
>               do something with it
>       }
> 
> > If there will be support for persistent connections, will
> that
> > support include a means to close those connections on
> command;
> > without killing the process from the shell, removing power
> to the
> > system or some other drastic measure [...]
> 
> Yes, the $zoom->close() method will do this.
> 
> > [...] as may be required for some existing Zoom bindings
> with no
> > means to close a persistent connection?
> 
> There are none to my knowledge.  The ZOOM Abstract API
> mandates a
> Close method for Connection object -- see:
>       http://zoom.z3950.org/api/zoom-1.4.html#3.2.6
> and it is implemented (under the name
> ZOOM_connection_destroy()) but
> the ZOOM-C binding -- see:
>       http://indexdata.com/yaz/doc/zoom.tkl#zoom.connections
> and also by the current Perl implementation, the Net::Z3950
> module --
> see:
>       http://perl.z3950.org/docs/Z3950/Connection.html#close()
> 
> I am not quite sure what your question means ...
> 
>  _/|_ 
> ___________________________________________________________________
> /o ) \/  Mike Taylor  <address@hidden> 
> http://www.miketaylor.org.uk
> )_v__/\  "No one in charge of Christianity seems to be that
> convinced
>        about the product" -- Tim Rice.
> 
> 
> 
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