THRIFT-1914 Python: Support for Multiplexing Services on any
Transport, Protocol and Server
Patch: smallfish & djwatson
& haijunz & Roger Meier
This closes #103 and #82
From 7aaea7ef4e6f44097b02543fa2e62597eae9d61e Mon Sep 17 00:00:00 2001
From: smallfish <smallfish.xy@gmail.com>
Date: Tue, 22 Apr 2014 11:26:52 +0800
Subject: [PATCH] THRIFT-1914 Python: Support for Multiplexing Services on any
Transport
diff --git a/lib/py/src/TMultiplexedProcessor.py b/lib/py/src/TMultiplexedProcessor.py
new file mode 100644
index 0000000..a8d5565
--- /dev/null
+++ b/lib/py/src/TMultiplexedProcessor.py
@@ -0,0 +1,58 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+from thrift.Thrift import TProcessor, TMessageType, TException
+from thrift.protocol import TProtocolDecorator, TMultiplexedProtocol
+
+class TMultiplexedProcessor(TProcessor):
+ def __init__(self):
+ self.services = {}
+
+ def registerProcessor(self, serviceName, processor):
+ self.services[serviceName] = processor
+
+ def process(self, iprot, oprot):
+ (name, type, seqid) = iprot.readMessageBegin();
+ if type != TMessageType.CALL & type != TMessageType.ONEWAY:
+ raise TException("TMultiplex protocol only supports CALL & ONEWAY")
+
+ index = name.find(TMultiplexedProtocol.SEPARATOR)
+ if index < 0:
+ raise TException("Service name not found in message name: " + name + ". Did you forget to use TMultiplexProtocol in your client?")
+
+ serviceName = name[0:index]
+ call = name[index+len(TMultiplexedProtocol.SEPARATOR):]
+ if not serviceName in self.services:
+ raise TException("Service name not found: " + serviceName + ". Did you forget to call registerProcessor()?")
+
+ standardMessage = (
+ call,
+ type,
+ seqid
+ )
+ return self.services[serviceName].process(StoredMessageProtocol(iprot, standardMessage), oprot)
+
+
+class StoredMessageProtocol(TProtocolDecorator.TProtocolDecorator):
+ def __init__(self, protocol, messageBegin):
+ TProtocolDecorator.TProtocolDecorator.__init__(self, protocol)
+ self.messageBegin = messageBegin
+
+ def readMessageBegin(self):
+ return self.messageBegin
diff --git a/lib/py/src/protocol/TMultiplexedProtocol.py b/lib/py/src/protocol/TMultiplexedProtocol.py
new file mode 100644
index 0000000..d25f367
--- /dev/null
+++ b/lib/py/src/protocol/TMultiplexedProtocol.py
@@ -0,0 +1,39 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+from thrift.Thrift import TMessageType
+from thrift.protocol import TProtocolDecorator
+
+SEPARATOR = ":"
+
+class TMultiplexedProtocol(TProtocolDecorator.TProtocolDecorator):
+ def __init__(self, protocol, serviceName):
+ TProtocolDecorator.TProtocolDecorator.__init__(self, protocol)
+ self.serviceName = serviceName
+
+ def writeMessageBegin(self, name, type, seqid):
+ if (type == TMessageType.CALL or
+ type == TMessageType.ONEWAY):
+ self.protocol.writeMessageBegin(
+ self.serviceName + SEPARATOR + name,
+ type,
+ seqid
+ )
+ else:
+ self.protocol.writeMessageBegin(name, type, seqid)
diff --git a/lib/py/src/protocol/TProtocolDecorator.py b/lib/py/src/protocol/TProtocolDecorator.py
new file mode 100644
index 0000000..3e9e500
--- /dev/null
+++ b/lib/py/src/protocol/TProtocolDecorator.py
@@ -0,0 +1,42 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+from thrift.protocol.TProtocol import TProtocolBase
+from types import *
+
+class TProtocolDecorator():
+ def __init__(self, protocol):
+ TProtocolBase(protocol)
+ self.protocol = protocol
+
+ def __getattr__(self, name):
+ if hasattr(self.protocol, name):
+ member = getattr(self.protocol, name)
+ if type(member) in [MethodType, UnboundMethodType, FunctionType, LambdaType, BuiltinFunctionType, BuiltinMethodType]:
+ return lambda *args, **kwargs: self._wrap(member, args, kwargs)
+ else:
+ return member
+ raise AttributeError(name)
+
+ def _wrap(self, func, args, kwargs):
+ if type(func) == MethodType:
+ result = func(*args, **kwargs)
+ else:
+ result = func(self.protocol, *args, **kwargs)
+ return result