00001 /* 00002 * StatisticalLimitFilter.h : part of the Mace toolkit for building distributed systems 00003 * 00004 * Copyright (c) 2007, Charles Killian, Dejan Kostic, Ryan Braud, James W. Anderson, John Fisher-Ogden, Calvin Hubble, Duy Nguyen, Justin Burke, David Oppenheimer, Amin Vahdat, Adolfo Rodriguez, Sooraj Bhat 00005 * All rights reserved. 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions are met: 00009 * 00010 * * Redistributions of source code must retain the above copyright 00011 * notice, this list of conditions and the following disclaimer. 00012 * * Redistributions in binary form must reproduce the above copyright 00013 * notice, this list of conditions and the following disclaimer in 00014 * the documentation and/or other materials provided with the 00015 * distribution. 00016 * * Neither the names of Duke University nor The University of 00017 * California, San Diego, nor the names of the authors or contributors 00018 * may be used to endorse or promote products derived from 00019 * this software without specific prior written permission. 00020 * 00021 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00022 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00023 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00024 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 00025 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00026 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 00027 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 00028 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00029 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 00030 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00031 * 00032 * ----END-OF-LEGAL-STUFF---- */ 00033 #include <list> 00034 #include <sys/types.h> 00035 #include "GenericFilter.h" 00036 00042 #ifndef _STATISTICALLIMITFILTER_H 00043 #define _STATISTICALLIMITFILTER_H 00044 00053 class StatisticalLimitFilter : public GenericFilter { 00054 00055 public: 00056 StatisticalLimitFilter(int limit = 10); 00057 virtual ~StatisticalLimitFilter(); 00058 void update(double incoming); 00059 double getDeviation(); 00060 int getCount(); 00061 double getPercentile(double rank); 00062 int reset(); 00063 00064 protected: 00065 double total; 00066 double total_square; 00067 double standard_deviation; 00068 int measurements; 00069 unsigned int keep_limit ; 00070 std::list< double > contents; 00071 }; 00072 00075 #endif //_STATISTICAL_LIMIT_FILTER_H