00001 /* 00002 * Copyright 2010 Google Inc. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http:///www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00018 00019 #ifndef NET_INSTAWEB_UTIL_PUBLIC_SIMPLE_STATS_H_ 00020 #define NET_INSTAWEB_UTIL_PUBLIC_SIMPLE_STATS_H_ 00021 00022 #include "net/instaweb/util/public/atomic_int32.h" 00023 #include "net/instaweb/util/public/basictypes.h" 00024 #include "net/instaweb/util/public/statistics.h" 00025 #include "net/instaweb/util/public/statistics_template.h" 00026 #include "net/instaweb/util/public/string_util.h" 00027 00028 namespace net_instaweb { 00029 00030 class SimpleStatsVariable : public Variable { 00031 public: 00032 SimpleStatsVariable() : value_(0) {} 00033 virtual ~SimpleStatsVariable(); 00034 virtual int Get() const { return value_.value(); } 00035 virtual int64 Get64() const { return value_.value(); } 00036 virtual void Set(int value) { value_.set_value(value); } 00037 virtual void Add(int delta) { value_.increment(delta); } 00038 00039 private: 00040 AtomicInt32 value_; 00041 00042 DISALLOW_COPY_AND_ASSIGN(SimpleStatsVariable); 00043 }; 00044 00046 class SimpleStats : public ScalarStatisticsTemplate<SimpleStatsVariable> { 00047 public: 00048 static const int kNotFound; 00049 00050 SimpleStats() { } 00051 virtual ~SimpleStats(); 00052 00053 protected: 00054 virtual SimpleStatsVariable* NewVariable(const StringPiece& name, int index); 00055 00056 private: 00057 DISALLOW_COPY_AND_ASSIGN(SimpleStats); 00058 }; 00059 00060 } 00061 00062 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_SIMPLE_STATS_H_