storm-core/src/dev/resources/tester_spout.py

# -*- coding: utf-8 -*-

# Licensed to the Apache Software Foundation (ASF) under one
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# 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
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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# This Python file uses the following encoding: utf-8

from storm import Spout, emit, log
from random import choice
from time import sleep
from uuid import uuid4

words = [u"nathan", u"mike", u"jackson", u"golda", u"bertels人"]

class TesterSpout(Spout):
    def initialize(self, conf, context):
        emit(['spout initializing'])
        self.pending = {}

    def nextTuple(self):
        sleep(1.0/2)
        word = choice(words)
        id = str(uuid4())
        self.pending[id] = word
        emit([word], id=id)

    def ack(self, id):
        del self.pending[id]

    def fail(self, id):
        log("emitting " + self.pending[id] + " on fail")
        emit([self.pending[id]], id=id)

TesterSpout().run()