THRIFT-148. py: Add un-commited file missing from 749510

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@749786 13f79535-47bb-0310-9956-ffa450edef68

lib/py/src/transport/TTwisted.py

@@ -0,0 +1,154 @@
+from zope.interface import implements, Interface, Attribute
+from twisted.internet.protocol import Protocol, ServerFactory, ClientFactory,
+    connectionDone
+from twisted.protocols import basic
+from twisted.python import log
+from thrift.transport import TTransport
+from cStringIO import StringIO
+
+
+class TMessageSenderTransport(TTransport.TTransportBase):
+
+    def __init__(self):
+        self.__wbuf = StringIO()
+
+    def write(self, buf):
+        self.__wbuf.write(buf)
+
+    def flush(self):
+        msg = self.__wbuf.getvalue()
+        self.__wbuf = StringIO()
+        self.sendMessage(msg)
+
+    def sendMessage(self, message):
+        raise NotImplementedError
+
+
+class TCallbackTransport(TMessageSenderTransport):
+
+    def __init__(self, func):
+        TMessageSenderTransport.__init__(self)
+        self.func = func
+
+    def sendMessage(self, message):
+        self.func(message)
+
+
+class ThriftClientProtocol(basic.Int32StringReceiver):
+
+    def __init__(self, client_class, iprot_factory, oprot_factory=None):
+        self._client_class = client_class
+        self._iprot_factory = iprot_factory
+        if oprot_factory is None:
+            self._oprot_factory = iprot_factory
+        else:
+            self._oprot_factory = oprot_factory
+
+        self.recv_map = {}
+
+    def dispatch(self, msg):
+        self.sendString(msg)
+
+    def connectionMade(self):
+        tmo = TCallbackTransport(self.dispatch)
+        self.client = self._client_class(tmo, self._oprot_factory)
+
+    def connectionLost(self, reason=connectionDone):
+        for k,v in self.client._reqs.iteritems():
+            tex = TTransport.TTransportException(
+                type=TTransport.TTransportException.END_OF_FILE,
+                message='Connection closed')
+            v.errback(tex)
+
+    def stringReceived(self, frame):
+        tr = TTransport.TMemoryBuffer(frame)
+        iprot = self._iprot_factory.getProtocol(tr)
+        (fname, mtype, rseqid) = iprot.readMessageBegin()
+
+        try:
+            method = self.recv_map[fname]
+        except KeyError:
+            method = getattr(self.client, 'recv_' + fname)
+            self.recv_map[fname] = method
+
+        method(iprot, mtype, rseqid)
+
+
+class ThriftServerProtocol(basic.Int32StringReceiver):
+
+    def dispatch(self, msg):
+        self.sendString(msg)
+
+    def processError(self, error):
+        self.transport.loseConnection()
+
+    def processOk(self, _, tmo):
+        msg = tmo.getvalue()
+
+        if len(msg) > 0:
+            self.dispatch(msg)
+
+    def stringReceived(self, frame):
+        tmi = TTransport.TMemoryBuffer(frame)
+        tmo = TTransport.TMemoryBuffer()
+
+        iprot = self.factory.iprot_factory.getProtocol(tmi)
+        oprot = self.factory.oprot_factory.getProtocol(tmo)
+
+        d = self.factory.processor.process(iprot, oprot)
+        d.addCallbacks(self.processOk, self.processError,
+            callbackArgs=(tmo,))
+
+
+class IThriftServerFactory(Interface):
+
+    processor = Attribute("Thrift processor")
+
+    iprot_factory = Attribute("Input protocol factory")
+
+    oprot_factory = Attribute("Output protocol factory")
+
+
+class IThriftClientFactory(Interface):
+
+    client_class = Attribute("Thrift client class")
+
+    iprot_factory = Attribute("Input protocol factory")
+
+    oprot_factory = Attribute("Output protocol factory")
+
+
+class ThriftServerFactory(ServerFactory):
+
+    implements(IThriftServerFactory)
+
+    protocol = ThriftServerProtocol
+
+    def __init__(self, processor, iprot_factory, oprot_factory=None):
+        self.processor = processor
+        self.iprot_factory = iprot_factory
+        if oprot_factory is None:
+            self.oprot_factory = iprot_factory
+        else:
+            self.oprot_factory = oprot_factory
+
+
+class ThriftClientFactory(ClientFactory):
+
+    implements(IThriftClientFactory)
+
+    protocol = ThriftClientProtocol
+
+    def __init__(self, client_class, iprot_factory, oprot_factory=None):
+        self.client_class = client_class
+        self.iprot_factory = iprot_factory
+        if oprot_factory is None:
+            self.oprot_factory = iprot_factory
+        else:
+            self.oprot_factory = oprot_factory
+
+    def buildProtocol(self, addr):
+        p = self.protocol(self.client_class, self.iprot_factory,
+            self.oprot_factory)
+        p.factory = self
+        return p