Moved everything database related to db/.

1 files changed, 52 insertions, 0 deletions

diff --git a/src/db/couch/feedreader.py b/src/db/couch/feedreader.py
new file mode 100644
index 0000000..e293932
--- /dev/null
+++ b/src/db/couch/feedreader.py
@@ -0,0 +1,52 @@
+# -*- coding: utf-8 -*-
+# Based on py-couchdb (https://github.com/histrio/py-couchdb)
+
+
+class BaseFeedReader(object):
+    """
+    Base interface class for changes feed reader.
+    """
+
+    def __call__(self, db):
+        self.db = db
+        return self
+
+    def on_message(self, message):
+        """
+        Callback method that is called when change
+        message is received from couchdb.
+
+        :param message: change object
+        :returns: None
+        """
+
+        raise NotImplementedError()
+
+    def on_close(self):
+        """
+        Callback method that is received when connection
+        is closed with a server. By default, does nothing.
+        """
+        pass
+
+    def on_heartbeat(self):
+        """
+        Callback method invoked when a hearbeat (empty line) is received
+        from the _changes stream. Override this to purge the reader's internal
+        buffers (if any) if it waited too long without receiving anything.
+        """
+        pass
+
+
+class SimpleFeedReader(BaseFeedReader):
+    """
+    Simple feed reader that encapsule any callable in
+    a valid feed reader interface.
+    """
+
+    def __call__(self, db, callback):
+        self.callback = callback
+        return super(SimpleFeedReader, self).__call__(db)
+
+    def on_message(self, message):
+        self.callback(message, db=self.db)