python: Implement new event API.

This implements set_event_callback and delete_event_callback so that
Python programs can use the new event mechanism.

1 files changed, 58 insertions, 0 deletions

diff --git a/python/t/400-events.py b/python/t/400-events.py
new file mode 100644
index 00000000..1c29b004
--- /dev/null
+++ b/python/t/400-events.py
@@ -0,0 +1,58 @@
+# libguestfs Python bindings
+# Copyright (C) 2011 Red Hat Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+import os
+import guestfs
+
+g = guestfs.GuestFS()
+
+def log_callback (ev,eh,buf,array):
+    if ev == guestfs.EVENT_APPLIANCE:
+        buf = buf.rstrip()
+
+    # Log what happened.
+    print ("python event logged: event=0x%x eh=%d buf='%s' array=%s" %
+           (ev, eh, buf, array))
+
+close_invoked = 0
+
+def close_callback (ev, eh, buf, array):
+    global close_invoked
+    close_invoked += 1
+    log_callback (ev, eh, buf, array)
+
+# Register an event callback for all log messages.
+events = guestfs.EVENT_APPLIANCE | guestfs.EVENT_LIBRARY | guestfs.EVENT_TRACE
+g.set_event_callback (log_callback, events)
+
+# Register a callback for the close event.
+g.set_event_callback (close_callback, guestfs.EVENT_CLOSE)
+
+# Now make sure we see some messages.
+g.set_trace (1)
+g.set_verbose (1)
+
+# Do some stuff.
+g.add_drive_ro ("/dev/null")
+g.set_autosync (1)
+
+# Close the handle.  The close callback should be invoked.
+if close_invoked != 0:
+    raise "Error: close_invoked should be 0"
+del g
+if close_invoked != 1:
+    raise "Error: close_invoked should be 1"