| # 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. |
| |
| import collections |
| |
| class Buffer(): |
| def __init__(self, size = 100, abandon_output = True): |
| self.buf_short = collections.deque(maxlen = size) |
| self.buf = [] |
| self.abandon_output = abandon_output |
| |
| def put(self, line): |
| if not self.abandon_output: |
| self.buf.append(line) |
| self.buf_short.append(line) |
| |
| def get_short(self): |
| return ''.join(self.buf_short) |
| |
| def get_long(self): |
| if self.abandon_output: |
| return None |
| else: |
| return ''.join(self.buf) |
