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#
# 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.
#
import logging
import zmq
import thrift.server.TServer
import thrift.transport.TTransport
class TZmqServer(thrift.server.TServer.TServer):
def __init__(self, processor, ctx, endpoint, sock_type):
thrift.server.TServer.TServer.__init__(self, processor, None)
self.zmq_type = sock_type
self.socket = ctx.socket(sock_type)
self.socket.bind(endpoint)
def serveOne(self):
msg = self.socket.recv()
itrans = thrift.transport.TTransport.TMemoryBuffer(msg)
otrans = thrift.transport.TTransport.TMemoryBuffer()
iprot = self.inputProtocolFactory.getProtocol(itrans)
oprot = self.outputProtocolFactory.getProtocol(otrans)
try:
self.processor.process(iprot, oprot)
except Exception:
logging.exception("Exception while processing request")
# Fall through and send back a response, even if empty or incomplete.
if self.zmq_type == zmq.REP:
msg = otrans.getvalue()
self.socket.send(msg)
def serve(self):
while True:
self.serveOne()
class TZmqMultiServer(object):
def __init__(self):
self.servers = []
def serveOne(self, timeout = -1):
self._serveActive(self._setupPoll(), timeout)
def serveForever(self):
poll_info = self._setupPoll()
while True:
self._serveActive(poll_info, -1)
def _setupPoll(self):
server_map = {}
poller = zmq.Poller()
for server in self.servers:
server_map[server.socket] = server
poller.register(server.socket, zmq.POLLIN)
return (server_map, poller)
def _serveActive(self, poll_info, timeout):
(server_map, poller) = poll_info
ready = dict(poller.poll())
for sock, state in ready.items():
assert (state & zmq.POLLIN) != 0
server_map[sock].serveOne()
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