pulsar-functions/python-examples/wordcount_function.py

#
# 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 pulsar import Function

# The classic ExclamationFunction that appends an exclamation at the end
# of the input
class WordCountFunction(Function):
    def __init__(self):
        pass

    def process(self, input, context):
        words = input.split()
        for word in words:
            context.incr_counter(word, 1)
            context.get_logger().info("The value is " + str(context.get_counter(word)))
        return input + "!"