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-rw-r--r--util/pubsub.lua11
1 files changed, 11 insertions, 0 deletions
diff --git a/util/pubsub.lua b/util/pubsub.lua
index 424a48c6..2f8525b6 100644
--- a/util/pubsub.lua
+++ b/util/pubsub.lua
@@ -12,6 +12,7 @@ local default_config = { __index = {
capabilities = {};
} };
local default_node_config = { __index = {
+ ["pubsub#max_items"] = "20";
} };
function new(config)
@@ -262,6 +263,14 @@ local function remove_item_by_id(data, id)
end
end
+local function trim_items(data, max)
+ max = tonumber(max);
+ if not max or #data <= max then return end
+ repeat
+ data[t_remove(data, 1)] = nil;
+ until #data <= max
+end
+
function service:publish(node, actor, id, item)
-- Access checking
if not self:may(node, actor, "publish") then
@@ -283,6 +292,7 @@ function service:publish(node, actor, id, item)
remove_item_by_id(node_data, id);
node_data[#node_data + 1] = id;
node_data[id] = item;
+ trim_items(node_data, node_obj.config["pubsub#max_items"]);
self.events.fire_event("item-published", { node = node, actor = actor, id = id, item = item });
self.config.broadcaster("items", node, node_obj.subscribers, item);
return true;
@@ -427,6 +437,7 @@ function service:set_node_config(node, actor, new_config)
for k,v in pairs(new_config) do
node_obj.config[k] = v;
end
+ trim_items(self.data[node], node_obj.config["pubsub#max_items"]);
return true;
end