| #!/usr/bin/env python |
| # |
| # Copyright 2010 Google Inc. |
| # |
| # Licensed 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. |
| |
| """Counters-related operations.""" |
| |
| |
| |
| __all__ = ['Increment'] |
| |
| # Deprecated. Use map_job_context.SliceContext.count instead. |
| |
| from mapreduce.operation import base |
| |
| # pylint: disable=protected-access |
| |
| |
| class Increment(base.Operation): |
| """Increment counter operation.""" |
| |
| def __init__(self, counter_name, delta=1): |
| """Constructor. |
| |
| Args: |
| counter_name: name of the counter as string |
| delta: increment delta as int. |
| """ |
| self.counter_name = counter_name |
| self.delta = delta |
| |
| def __call__(self, context): |
| """Execute operation. |
| |
| Args: |
| context: mapreduce context as context.Context. |
| """ |
| context._counters.increment(self.counter_name, self.delta) |