X-Git-Url: http://git.annexia.org/?p=whenjobs.git;a=blobdiff_plain;f=daemon%2Fdaemon.ml;h=bbaab131a1270c40ce237a6f431e7995b9f9c4b0;hp=e18574d3bbab6bf5cf5ec346d3bb072305d5eaeb;hb=d6da1b74e241e79eb0af9c01e390e98ceead3a49;hpb=550bd0df9a6c9067dd0e2f9e77ae650efdf62454

diff --git a/daemon/daemon.ml b/daemon/daemon.ml
index e18574d..bbaab13 100644
--- a/daemon/daemon.ml
+++ b/daemon/daemon.ml
@@ -99,7 +99,7 @@ let rec init j d =
 and proc_reload_file () =
   if !debug then Syslog.notice "remote call: reload_file";
 
-  try reload_file (); `ok
+  try reload_files (); `ok
   with Failure err -> `error err
 
 and proc_set_variable (name, value) =
@@ -290,9 +290,42 @@ and proc_whisper_variables vars =
   with
     Failure msg -> `error msg
 
-(* Reload the jobs file. *)
-and reload_file () =
-  let file = sprintf "%s/jobs.cmo" !jobsdir in
+(* Reload the jobs file(s). *)
+and reload_files () =
+  (* Get the highest numbered dir/jobs__*.cmo (bytecode) or
+   * dir/jobs__*.cmxs (native code) file and load it.  Delete
+   * lower-numbered (== older) files.
+   *)
+  let filename =
+    let suffix, slen =
+      if not Dynlink.is_native then ".cmo", 4 else ".cmxs", 5 in
+    let dir = !jobsdir in
+    let files = Array.to_list (Sys.readdir dir) in
+    let times = filter_map (
+      fun file ->
+        if not (string_startswith file "jobs__") ||
+          not (string_endswith file suffix) then
+          None
+        else (
+          let len = String.length file in
+          let t = String.sub file 6 (len-slen-6) in
+          (* Use int64 because t won't necessarily fit into 31 bit int. *)
+          try Some (Int64.of_string t)
+          with Failure "int_of_string" -> assert false
+        )
+    ) files in
+    let times = List.rev (List.sort compare times) in
+    match times with
+    | [] -> None
+    | x::xs ->
+      (* Unlink the older files. *)
+      List.iter (
+        fun t ->
+          try unlink (dir // sprintf "jobs__%Ld%s" t suffix)
+          with Unix_error _ -> ()
+      ) xs;
+      (* Return the newest (highest numbered) file. *)
+      Some (dir // sprintf "jobs__%Ld%s" x suffix) in
 
   (* As we are reloading the file, we want to create a new state
    * that has no jobs, but has all the variables from the previous
@@ -302,18 +335,24 @@ and reload_file () =
   Whenfile.init s;
 
   let s =
-    try
-      Dynlink.loadfile file;
-      let s = Whenfile.get_state () in
-      Syslog.notice "loaded %d job(s) from %s" (Whenstate.nr_jobs s) file;
+    match filename with
+    | None ->
+      (* no jobs file, return the same state *)
+      Syslog.notice "no jobs file found";
       s
-    with
-    | Dynlink.Error err ->
-      let err = Dynlink.error_message err in
-      Syslog.error "error loading jobs: %s" err;
-      failwith err
-    | exn ->
-      failwith (Printexc.to_string exn) in
+    | Some filename ->
+      try
+        Dynlink.loadfile filename;
+        let s = Whenfile.get_state () in
+        Syslog.notice "loaded %d job(s)" (Whenstate.nr_jobs s);
+        s
+      with
+      | Dynlink.Error err ->
+        let err = Dynlink.error_message err in
+        Syslog.error "error loading jobs: %s" err;
+        failwith err
+      | exn ->
+        failwith (Printexc.to_string exn) in
 
   let s = Whenstate.copy_prev_state !state s in
   state := s;