Page Speed Optimization Libraries
1.2.24.1
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00001 /* 00002 * Copyright 2012 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_CACHE_STATS_H_ 00020 #define NET_INSTAWEB_UTIL_PUBLIC_CACHE_STATS_H_ 00021 00022 #include "net/instaweb/util/public/atomic_bool.h" 00023 #include "net/instaweb/util/public/basictypes.h" 00024 #include "net/instaweb/util/public/cache_interface.h" 00025 #include "net/instaweb/util/public/scoped_ptr.h" 00026 #include "net/instaweb/util/public/string.h" 00027 #include "net/instaweb/util/public/string_util.h" 00028 00029 namespace net_instaweb { 00030 00031 class Histogram; 00032 class SharedString; 00033 class Statistics; 00034 class Timer; 00035 class Variable; 00036 00041 class CacheStats : public CacheInterface { 00042 public: 00044 CacheStats(StringPiece prefix, 00045 CacheInterface* cache, 00046 Timer* timer, 00047 Statistics* statistics); 00048 virtual ~CacheStats(); 00049 00051 static void InitStats(StringPiece prefix, Statistics* statistics); 00052 00053 virtual void Get(const GoogleString& key, Callback* callback); 00054 virtual void MultiGet(MultiGetRequest* request); 00055 virtual void Put(const GoogleString& key, SharedString* value); 00056 virtual void Delete(const GoogleString& key); 00057 virtual const char* Name() const { return name_.c_str(); } 00058 virtual bool IsBlocking() const { return cache_->IsBlocking(); } 00059 00060 virtual bool IsHealthy() const { 00061 return !shutdown_.value() && cache_->IsHealthy(); 00062 } 00063 00064 virtual void ShutDown() { 00065 shutdown_.set_value(true); 00066 cache_->ShutDown(); 00067 } 00068 00069 private: 00070 class StatsCallback; 00071 friend class StatsCallback; 00072 00073 scoped_ptr<CacheInterface> cache_; 00074 Timer* timer_; 00075 Histogram* get_count_histogram_; 00076 Histogram* hit_latency_us_histogram_; 00077 Histogram* insert_latency_us_histogram_; 00078 Histogram* insert_size_bytes_histogram_; 00079 Histogram* lookup_size_bytes_histogram_; 00080 Variable* deletes_; 00081 Variable* hits_; 00082 Variable* inserts_; 00083 Variable* misses_; 00084 GoogleString name_; 00085 AtomicBool shutdown_; 00086 00087 DISALLOW_COPY_AND_ASSIGN(CacheStats); 00088 }; 00089 00090 } 00091 00092 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_CACHE_STATS_H_