rewrote combox.events.NodeDirMonitor.on_modified method.

     - Now the the node monitor waits for all shards of the file,
	   which was modified on a remote computer, to arrive on this
	   computer, before it re-constructs the file into the respective
	   location in the combox directory.

    - Tests for it is at
	  tests.events_test.TestEvents.test_NDM_onmodified method.

	modified:   combox/events.py
	modified:   tests/events_test.py

Part of this was done while listening to Avril's "Complicated" ; I
think this is the only modern Pop song which I like.

1 files changed, 8 insertions, 3 deletions

diff --git a/combox/events.py b/combox/events.py
index 609ed8e..bc6fe8b 100644
--- a/combox/events.py
+++ b/combox/events.py
@@ -373,6 +373,11 @@ class NodeDirMonitor(LoggingEventHandler):
                 # means, file was modified on another computer (also
                 # running combox). so, reconstruct the file and put it
                 # in the combox directory.
-                decrypt_and_glue(file_cb_path, self.config)
-                # update db.
-                self.silo.update(file_cb_path)
+                with self.lock:
+                    self.silo.node_set('file_modified', file_cb_path)
+                    num = self.silo.node_get('file_modified', file_cb_path)
+                    if num == self.num_nodes:
+                        decrypt_and_glue(file_cb_path, self.config)
+                        # update db.
+                        self.silo.update(file_cb_path)
+                        self.silo.node_rem('file_modified', file_cb_path)