| # |
| # 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 concurrent.futures import Future |
| |
| __author__ = 'David M. Brown (davebshow@gmail.com)' |
| |
| |
| class ResultSet: |
| |
| def __init__(self, stream, request_id): |
| self._stream = stream |
| self._request_id = request_id |
| self._done = None |
| self._aggregate_to = None |
| |
| @property |
| def aggregate_to(self): |
| return self._aggregate_to |
| |
| @aggregate_to.setter |
| def aggregate_to(self, val): |
| self._aggregate_to = val |
| |
| @property |
| def request_id(self): |
| return self._request_id |
| |
| @property |
| def stream(self): |
| return self._stream |
| |
| def __iter__(self): |
| return self |
| |
| def __next__(self): |
| result = self.one() |
| if not result: |
| raise StopIteration |
| return result |
| |
| def next(self): |
| return self.__next__() |
| |
| @property |
| def done(self): |
| return self._done |
| |
| @done.setter |
| def done(self, future): |
| self._done = future |
| |
| def one(self): |
| while not self.done.done(): |
| if not self.stream.empty(): |
| return self.stream.get_nowait() |
| if not self.stream.empty(): |
| return self.stream.get_nowait() |
| return self.done.result() |
| |
| def all(self): |
| future = Future() |
| |
| def cb(f): |
| try: |
| f.result() |
| except Exception as e: |
| future.set_exception(e) |
| else: |
| results = [] |
| while not self.stream.empty(): |
| results += self.stream.get_nowait() |
| future.set_result(results) |
| |
| self.done.add_done_callback(cb) |
| return future |