[kupfer] core: Periodically save user data ("config" from sources)

[Ulrik Sverdrup <usverdrup src gnome org>]

commit 17f840f6bd05011ff016f15e84998bd825a24892
Author: Ulrik Sverdrup <ulrik sverdrup gmail com>
Date:   Wed Mar 2 21:47:17 2011 +0100

    core: Periodically save user data ("config" from sources)
    
    In the DataController, periodically save the learning database as well
    as the "config" data from all Sources. Default period is 1 hour.
    
    Decreaced learn record pruning probability since it will be pruned
    more often now.

 kupfer/core/data.py  |   25 +++++++++++++++++++++----
 kupfer/core/learn.py |    6 +++---
 2 files changed, 24 insertions(+), 7 deletions(-)
---
diff --git a/kupfer/core/data.py b/kupfer/core/data.py
index afd526a..fc15f9d 100644
--- a/kupfer/core/data.py
+++ b/kupfer/core/data.py
@@ -26,6 +26,8 @@ SourcePane, ActionPane, ObjectPane = (1,2,3)
 # In two-pane or three-pane mode
 SourceActionMode, SourceActionObjectMode = (1,2)
 
+DATA_SAVE_INTERVAL_S = 3660
+
 def identity(x):
 	return x
 
@@ -433,6 +435,8 @@ class DataController (gobject.GObject, pretty.OutputMixin):
 		self._execution_context.connect("late-command-result",
 				self._late_command_execution_result)
 
+		self._save_data_timer = scheduler.Timer()
+
 		sch = scheduler.GetScheduler()
 		sch.connect("load", self._load)
 		sch.connect("finish", self._finish)
@@ -482,7 +486,10 @@ class DataController (gobject.GObject, pretty.OutputMixin):
 			sc.add_action_generator(plugin_id, generator)
 
 	def _load(self, sched):
-		"""Load data from persistent store"""
+		"""Begin Data Controller work when we get application 'load' signal
+
+		Load the data model from saved configuration and caches
+		"""
 		setctl = settings.GetSettingsController()
 		setctl.connect("plugin-enabled-changed", self._plugin_enabled)
 		setctl.connect("plugin-toplevel-changed", self._plugin_catalog_changed)
@@ -495,6 +502,7 @@ class DataController (gobject.GObject, pretty.OutputMixin):
 		sc.initialize()
 		self._reload_source_root()
 		learn.load()
+		self._save_data_timer.set(DATA_SAVE_INTERVAL_S, self._save_data)
 
 	def _get_directory_sources(self):
 		"""
@@ -591,13 +599,22 @@ class DataController (gobject.GObject, pretty.OutputMixin):
 			self._reload_source_root()
 
 	def _finish(self, sched):
+		"Close down the data model, save user data, and write caches to disk"
 		GetSourceController().finalize()
-		self.output_info("Saving data...")
-		learn.finish()
-		GetSourceController().save_data()
+		self._save_data(final_invocation=True)
 		self.output_info("Saving cache...")
 		GetSourceController().save_cache()
 
+	def _save_data(self, final_invocation=False):
+		"""Save Learning data and User's configuration data in sources
+		(Recurring timer)
+		"""
+		self.output_info("Saving data...")
+		learn.save()
+		GetSourceController().save_data()
+		if not final_invocation:
+			self._save_data_timer.set(DATA_SAVE_INTERVAL_S, self._save_data)
+
 	def _new_source(self, ctr, src):
 		if ctr is self.source_pane:
 			pane = SourcePane
diff --git a/kupfer/core/learn.py b/kupfer/core/learn.py
index df2c997..88f6e02 100644
--- a/kupfer/core/learn.py
+++ b/kupfer/core/learn.py
@@ -113,7 +113,7 @@ def _prune_register():
 	rand = random.random
 
 	goalitems = 500
-	flux = 10.0
+	flux = 2.0
 	alpha = flux/goalitems**2
 
 	chance = min(0.1, len(_register)*alpha)
@@ -139,9 +139,9 @@ def load():
 	if not _register:
 		_register = {}
 
-def finish():
+def save():
 	"""
-	Close and save the learning record
+	Save the learning record
 	"""
 	if not _register:
 		pretty.print_debug(__name__, "Not writing empty register")