Upload basic info about completed swarming tasks to event_mon

appengine/swarming/event_mon_metrics.py

Index: appengine/swarming/event_mon_metrics.py
diff --git a/appengine/swarming/event_mon_metrics.py b/appengine/swarming/event_mon_metrics.py
new file mode 100644
index 0000000000000000000000000000000000000000..ba5a3b68e062bcb721f14bfe8ad4380a48e24644
--- /dev/null
+++ b/appengine/swarming/event_mon_metrics.py
@@ -0,0 +1,30 @@
+# Copyright 2016 The LUCI Authors. All rights reserved.
+# Use of this source code is governed under the Apache License, Version 2.0
+# that can be found in the LICENSE file.
+
+import logging
+
+import gae_event_mon
+
+
+def initialize():
+  gae_event_mon.initialize('swarming')
+
+
+def send_task_event(task_result_summary):
+  """Sends an event_mon event about a swarming task.
+
+  Currently implemented as sending a HTTP request.
+
+  Args:
+    task_result_summary: TaskResultSummary object.
+  """
+  event = gae_event_mon.Event('POINT')
+  event.proto.swarming_task_event.id = task_result_summary.task_id
+
+  # Isolate rest of the app from monitoring pipeline issues. They should
+  # not cause outage of swarming.
+  try:
+    event.send()
+  except Exception:
+    logging.exception('Caught exception while sending event')