add kikimr_configure

1 files changed, 55 insertions, 0 deletions

diff --git a/contrib/python/Twisted/py2/twisted/conch/mixin.py b/contrib/python/Twisted/py2/twisted/conch/mixin.py
new file mode 100644
index 0000000000..976e9ad18f
--- /dev/null
+++ b/contrib/python/Twisted/py2/twisted/conch/mixin.py
@@ -0,0 +1,55 @@
+# -*- test-case-name: twisted.conch.test.test_mixin -*-
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Experimental optimization
+
+This module provides a single mixin class which allows protocols to
+collapse numerous small writes into a single larger one.
+
+@author: Jp Calderone
+"""
+
+from twisted.internet import reactor
+
+class BufferingMixin:
+    """
+    Mixin which adds write buffering.
+    """
+    _delayedWriteCall = None
+    data = None
+
+    DELAY = 0.0
+
+    def schedule(self):
+        return reactor.callLater(self.DELAY, self.flush)
+
+
+    def reschedule(self, token):
+        token.reset(self.DELAY)
+
+
+    def write(self, data):
+        """
+        Buffer some bytes to be written soon.
+
+        Every call to this function delays the real write by C{self.DELAY}
+        seconds.  When the delay expires, all collected bytes are written
+        to the underlying transport using L{ITransport.writeSequence}.
+        """
+        if self._delayedWriteCall is None:
+            self.data = []
+            self._delayedWriteCall = self.schedule()
+        else:
+            self.reschedule(self._delayedWriteCall)
+        self.data.append(data)
+
+
+    def flush(self):
+        """
+        Flush the buffer immediately.
+        """
+        self._delayedWriteCall = None
+        self.transport.writeSequence(self.data)
+        self.data = None