server-cluster-procs.tcl


	The Toolkit for Online Communities 15889 Community Members, 0 members online, 2009 visitors today			Log In	Register

server-cluster-procs.tcl

OpenACS Home : ACS API Browser : ACS Tcl 4.5 : server-cluster-procs.tcl

Publicity:
[Public Only \| All]

server-cluster-procs.tcl

Provides methods for communicating between load-balanced servers.

Location:
packages/acs-tcl/tcl/server-cluster-procs.tcl
Created:
7 Mar 2000
Author:
Jon Salz
CVS Identification:
$Id: server-cluster-procs.tcl,v 1.8 2009/02/13 20:28:08 jeffd Exp $

Procedures in this file

ad_canonical_server_p (private)
server_cluster_all_hosts (public)
server_cluster_authorized_p (public)
server_cluster_enabled_p (public)
server_cluster_httpget_from_peers (private)
server_cluster_logging_p (private)
server_cluster_peer_hosts (public)

Detailed information

ad_canonical_server_p (private)

ad_canonical_server_p

Returns true if this is the primary server, false otherwise. we're using IP:port to uniquely identify the canonical server, since hostname or IP does not always uniquely identify an instance of aolserver (for instance, if we have the aolservers sitting behind a load balancer).

server_cluster_all_hosts (public)

server_cluster_all_hosts

Returns a list of all hosts, possibly including this host, in the server cluster.

server_cluster_authorized_p (public)

server_cluster_authorized_p ip

Can a request coming from $ip be a valid cluster request, i.e., matches some value in ClusterIPMask or is 127.0.0.1?

Parameters:
ip

server_cluster_enabled_p (public)

server_cluster_enabled_p

Returns true if clustering is enabled.

server_cluster_httpget_from_peers (private)

server_cluster_httpget_from_peers [ -timeout timeout ] url

Schedules an HTTP GET request to be issued immediately to all peer hosts (using ad_schedule_proc -once t -thread f -debug t 0).

Switches:

-timeout (defaults to "5") (optional)

Parameters:
url

server_cluster_logging_p (private)

server_cluster_logging_p

Returns true if we're logging cluster requests.

server_cluster_peer_hosts (public)

server_cluster_peer_hosts

Returns a list of all hosts, excluding this host, in the server cluster.