Refactor the util directory to use subpackages.

util/saas/cloudwatch.py

@@ -0,0 +1,47 @@
+import logging
+import boto
+
+from Queue import Queue
+from threading import Thread
+
+
+logger = logging.getLogger(__name__)
+
+def get_queue(app):
+  """
+  Returns a queue to a new CloudWatchSender.
+  """
+  access_key = app.config['CLOUDWATCH_AWS_ACCESS_KEY']
+  secret_key = app.config['CLOUDWATCH_AWS_SECRET_KEY']
+
+  queue = Queue()
+  sender = CloudWatchSender(queue, access_key, secret_key)
+  sender.start()
+  return queue
+
+class CloudWatchSender(Thread):
+  """
+  CloudWatchSender loops indefinitely and pulls metrics off of a queue then sends it to CloudWatch.
+  """
+  def __init__(self, request_queue, aws_access_key, aws_secret_key):
+    Thread.__init__(self)
+    self.daemon = True
+
+    self._aws_access_key = aws_access_key
+    self._aws_secret_key = aws_secret_key
+    self._put_metrics_queue = request_queue
+
+  def run(self):
+    try:
+      logger.debug('Starting CloudWatch sender process.')
+      connection = boto.connect_cloudwatch(self._aws_access_key, self._aws_secret_key)
+    except:
+      logger.exception('Failed to connect to CloudWatch.')
+
+    while True:
+      put_metric_args, kwargs = self._put_metrics_queue.get()
+      logger.debug('Got queued put metrics request.')
+      try:
+        connection.put_metric_data(*put_metric_args, **kwargs)
+      except:
+        logger.exception('Failed to write to CloudWatch')