From b968cb1330ecb13f26e35d948c0511882b89ab2a Mon Sep 17 00:00:00 2001
From: Magnus Ahltorp <map@kth.se>
Date: Fri, 24 Oct 2014 15:32:58 +0200
Subject: Added lager for logging

---
 src/fsyncport.erl | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/fsyncport.erl')

diff --git a/src/fsyncport.erl b/src/fsyncport.erl
index 7e2bf11..5084fdd 100644
--- a/src/fsyncport.erl
+++ b/src/fsyncport.erl
@@ -22,11 +22,13 @@ call_port(Msg) ->
     end.
 
 init(ExtPrg) ->
+    lager:debug("starting fsync service"),
     register(fsyncport, self()),
     process_flag(trap_exit, true),
     Ports = lists:map(fun(_N) -> open_port({spawn_executable, ExtPrg},
                                            [{packet, 2}]) end,
 		      lists:seq(1, 32)),
+    lager:debug("fsync service started", []),
     loop(Ports).
 
 loop(Ports) ->
@@ -34,12 +36,14 @@ loop(Ports) ->
 loop(IdlePorts, BusyPorts, Waiting) ->
     receive
 	{call, Caller, {fsync, Path}} ->
+            lager:debug("fsync incoming request: ~p", [Path]),
 	    case IdlePorts of
 	        [] ->
 		    loop(IdlePorts,
                          BusyPorts,
                          queue:in({Caller, Path}, Waiting));
 	        [Port | Rest] ->
+                    lager:debug("fsync port ~p assigned to request ~p", [Port, Path]),
 		    Port ! {self(), {command, Path}},
 		    loop(Rest,
                          dict:store(Port, {Caller, os:timestamp()}, BusyPorts),
@@ -47,6 +51,7 @@ loop(IdlePorts, BusyPorts, Waiting) ->
             end;
 
 	{Port, {data, Data}} when is_port(Port) ->
+            lager:debug("fsync request finished: ~p", [Port]),
 	    {Caller, Starttime} = dict:fetch(Port, BusyPorts),
 	    Stoptime = os:timestamp(),
             statreport({fsync, Stoptime, Starttime}),
@@ -65,6 +70,7 @@ loop(IdlePorts, BusyPorts, Waiting) ->
                          NewWaiting)
 	    end;
 	stop ->
+            lager:debug("fsync stop request received"),
 	    lists:foreach(fun (Port) ->
                                   Port ! {self(), close}
                           end,
@@ -78,6 +84,7 @@ loop(IdlePorts, BusyPorts, Waiting) ->
 		    exit(normal) %% XXX exits when first port is closed
 	    end;
 	{'EXIT', Port, _Reason} when is_port(Port) ->
+            lager:debug("fsync port ~p exited, exiting", [Port]),
             %% XXX supervisor doesn't restart fsyncport, why?
 	    exit(port_terminated)
     end.
-- 
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