Revert "remove monitoring code and deps"

This reverts commit 7b16d4fe870016b5e415585f1a57d44ae882745a.

technic/depends.txt

@@ -12,3 +12,4 @@ intllib?
 unified_inventory?
 vector_extras?
 dye?
+monitoring?

technic/machines/HV/quarry.lua

@@ -4,6 +4,15 @@ local S = technic.getter
 local tube_entry = "^pipeworks_tube_connection_metallic.png"
 local cable_entry = "^technic_cable_connection_overlay.png"
 
+local has_monitoring = minetest.get_modpath("monitoring")
+local metric_dig_count
+
+if has_monitoring then
+	metric_dig_count = monitoring.counter("technic_quarry_dig_count",
+		"number of technic quarry digs")
+
+end
+
 minetest.register_craft({
 	recipe = {
 		{"technic:carbon_plate",       "pipeworks:filter",       "technic:composite_plate"},
@@ -135,6 +144,9 @@ local function quarry_handle_purge(pos)
 end
 
 local function quarry_run(pos, node)
+	if metric_dig_count ~= nil then
+		metric_dig_count.inc()
+	end
 
 	local meta = minetest.get_meta(pos)
 	local owner = meta:get_string("owner")

technic/machines/switching_station.lua

@@ -4,6 +4,20 @@ technic.networks = {}
 technic.cables = {}
 technic.redundant_warn = {}
 
+local has_monitoring = minetest.get_modpath("monitoring")
+local metric_abm_count
+local metric_abm_latency
+
+if has_monitoring then
+	metric_abm_count = monitoring.counter("technic_switching_station_abm_count",
+		"number of technic switch abm calls")
+
+	metric_abm_latency = monitoring.histogram("technic_switching_station_abm_latency",
+		"latency of the technic switch abm calls",
+	  {0.001, 0.005, 0.01, 0.02, 0.1, 0.5, 1.0})
+end
+
+
 local mesecons_path = minetest.get_modpath("mesecons")
 local digilines_path = minetest.get_modpath("digilines")
 
@@ -242,6 +256,13 @@ minetest.register_abm({
 	action = function(pos, node, active_object_count, active_object_count_wider)
 		if not technic.powerctrl_state then return end
 
+		local timer
+		if has_monitoring then
+			metric_abm_count.inc()
+			timer = metric_abm_latency.timer()
+		end
+
+
 		local t0 	       = minetest.get_us_time()
 		local meta             = minetest.get_meta(pos)
 		local meta1            = nil
@@ -424,6 +445,8 @@ minetest.register_abm({
 				minetest.log("warning", "[technic] [+supply] switching station abm took " .. diff .. " us at " .. minetest.pos_to_string(pos))
 			end
 
+			if timer ~= nil then timer.observe() end
+			return
 		end
 
 		-- If the PR supply is not enough for the RE demand we will discharge the batteries too
@@ -453,6 +476,8 @@ minetest.register_abm({
 				minetest.log("warning", "[technic] [-supply] switching station abm took " .. diff .. " us at " .. minetest.pos_to_string(pos))
 			end
 
+			if timer ~= nil then timer.observe() end
+			return
 		end
 
 		-- If the PR+BA supply is not enough for the RE demand: Power only the batteries
@@ -477,6 +502,8 @@ minetest.register_abm({
 			minetest.log("warning", "[technic] switching station abm took " .. diff .. " us at " .. minetest.pos_to_string(pos))
 		end
 
+		if timer ~= nil then timer.observe() end
+
 	end,
 })