tutorial/py.tornado/PythonServer.py

#!/usr/bin/env python

#
# 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 sys
import glob
sys.path.append('gen-py.tornado')
sys.path.insert(0, glob.glob('../../lib/py/build/lib.*')[0])

from tutorial import Calculator
from tutorial.ttypes import Operation, InvalidOperation

from shared.ttypes import SharedStruct

from thrift import TTornado
from thrift.transport import TSocket
from thrift.transport import TTransport
from thrift.protocol import TBinaryProtocol
from thrift.server import TServer

from tornado import ioloop


class CalculatorHandler(object):
    def __init__(self):
        self.log = {}

    def ping(self, callback):
        print "ping()"
        callback()

    def add(self, n1, n2, callback):
        print "add({}, {})".format(n1, n2)
        callback(n1 + n2)

    def calculate(self, logid, work, callback):
        print "calculate({}, {})".format(logid, work)

        if work.op == Operation.ADD:
            val = work.num1 + work.num2
        elif work.op == Operation.SUBTRACT:
            val = work.num1 - work.num2
        elif work.op == Operation.MULTIPLY:
            val = work.num1 * work.num2
        elif work.op == Operation.DIVIDE:
            if work.num2 == 0:
                x = InvalidOperation()
                x.what = work.op
                x.why = "Cannot divide by 0"
                raise x
            val = work.num1 / work.num2
        else:
            x = InvalidOperation()
            x.what = work.op
            x.why = "Invalid operation"
            raise x

        log = SharedStruct()
        log.key = logid
        log.value = '%d' % (val)
        self.log[logid] = log
        callback(val)

    def getStruct(self, key, callback):
        print "getStruct({})".format(key)
        callback(self.log[key])

    def zip(self, callback):
        print "zip()"
        callback()


def main():
    handler = CalculatorHandler()
    processor = Calculator.Processor(handler)
    pfactory = TBinaryProtocol.TBinaryProtocolFactory()
    server = TTornado.TTornadoServer(processor, pfactory)

    print "Starting the server..."
    server.bind(9090)
    server.start(1)
    ioloop.IOLoop.instance().start()
    print "done."


if __name__ == "__main__":
    main()