Index: openacs-4/packages/acs-tcl/tcl/20-memoize-init.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/20-memoize-init.tcl,v
diff -u -r1.1 -r1.2
--- openacs-4/packages/acs-tcl/tcl/20-memoize-init.tcl	12 Apr 2001 16:58:18 -0000	1.1
+++ openacs-4/packages/acs-tcl/tcl/20-memoize-init.tcl	4 Jun 2006 00:45:47 -0000	1.2
@@ -6,3 +6,33 @@
 
 ns_cache create util_memoize -size \
     [ad_parameter -package_id [ad_acs_kernel_id] MaxSize memoize 200000]
+
+
+# We construct the body of util_memoize_flush differently depending
+# on whether clustering is enabled and what command is available for
+# cluster-wide flushing.
+
+if {[llength [info commands ncf.send]] > 0} {
+    set flush_body {
+        ncf.send util_memoize $script
+    }
+} elseif {[llength [info commands server_cluster_httpget_from_peers]] > 0} {
+    set flush_body {
+        server_cluster_httpget_from_peers "/SYSTEM/flush-memoized-statement.tcl?statement=[ns_urlencode $script]"
+    }
+} else {
+    set flush_body {}
+}
+
+append flush_body {
+    ns_cache flush util_memoize $script
+}
+
+ad_proc -public util_memoize_flush {script} {
+    Forget any cached value for <i>script</i>.  If clustering is
+    enabled, flush the caches on all servers in the cluster.
+
+    @param script The Tcl script whose cached value should be flushed.
+} $flush_body
+
+unset flush_body