[incubator-apisix] branch master updated: bugfix: removing stale objects from udp logger (#1544)

[me...@apache.org]

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membphis pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-apisix.git


The following commit(s) were added to refs/heads/master by this push:
     new a328fcc  bugfix: removing stale objects from udp logger (#1544)
a328fcc is described below

commit a328fcce80ac6d45a5a135818672167971a78db0
Author: Nirojan Selvanathan <ss...@gmail.com>
AuthorDate: Thu May 7 06:24:37 2020 +0200

    bugfix: removing stale objects from udp logger (#1544)
---
 apisix/plugins/udp-logger.lua | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/apisix/plugins/udp-logger.lua b/apisix/plugins/udp-logger.lua
index b1b565f..957e732 100644
--- a/apisix/plugins/udp-logger.lua
+++ b/apisix/plugins/udp-logger.lua
@@ -22,6 +22,9 @@ local tostring = tostring
 local buffers = {}
 local ngx = ngx
 local udp = ngx.socket.udp
+local ipairs   = ipairs
+local stale_timer_running = false;
+local timer_at = ngx.timer.at
 
 local schema = {
     type = "object",
@@ -78,6 +81,22 @@ local function send_udp_data(conf, log_message)
 end
 
 
+local function remove_stale_objects(premature)
+    if premature then
+        return
+    end
+
+    for key, batch in ipairs(buffers) do
+        if #batch.entry_buffer.entries == 0 and #batch.batch_to_process == 0 then
+            core.log.debug("removing batch processor stale object, route id:", tostring(key))
+            buffers[key] = nil
+        end
+    end
+
+    stale_timer_running = false
+end
+
+
 function _M.log(conf)
     local entry = log_util.get_full_log(ngx)
 
@@ -88,6 +107,12 @@ function _M.log(conf)
 
     local log_buffer = buffers[entry.route_id]
 
+    if not stale_timer_running then
+        -- run the timer every 30 mins if any log is present
+        timer_at(1800, remove_stale_objects)
+        stale_timer_running = true
+    end
+
     if log_buffer then
         log_buffer:push(entry)
         return