| # 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. |
| |
| try: |
| # Try with C based implemenation if available |
| import mmh3 |
| except ImportError: |
| # Fallback to pure python |
| import pymmh3 as mmh3 |
| |
| __SEED__ = 383242705 |
| |
| |
| class BytesHashRouter(object): |
| """A router that computes hash values for keys using MurmurHash3""" |
| |
| def __init__(self): |
| return |
| |
| def getRoutingKey(self, key): |
| return mmh3.hash64(key, seed=__SEED__, signed=True)[0] |
