Add sentry exception monitoring.

util/exceptionlog.py

@@ -0,0 +1,28 @@
+from raven.contrib.flask import Sentry as FlaskSentry
+
+class FakeSentry(object):
+  pass
+
+class Sentry(object):
+  def __init__(self, app=None):
+    self.app = app
+    if app is not None:
+      self.state = self.init_app(app)
+    else:
+      self.state = None
+
+  def init_app(self, app):
+    sentry_type = app.config.get('EXCEPTION_LOG_TYPE', 'FakeSentry')
+
+    if sentry_type == 'Sentry':
+      sentry = FlaskSentry(app)
+    else:
+      sentry = FakeSentry()
+
+    # register extension with app
+    app.extensions = getattr(app, 'extensions', {})
+    app.extensions['sentry'] = sentry
+    return sentry
+
+  def __getattr__(self, name):
+    return getattr(self.state, name, None)