Page Speed Optimization Libraries
1.6.29.3
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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/string.h" 00026 #include "net/instaweb/util/public/string_util.h" 00027 00028 namespace net_instaweb { 00029 00030 class Histogram; 00031 class SharedString; 00032 class Statistics; 00033 class Timer; 00034 class Variable; 00035 00040 class CacheStats : public CacheInterface { 00041 public: 00043 CacheStats(StringPiece prefix, 00044 CacheInterface* cache, 00045 Timer* timer, 00046 Statistics* statistics); 00047 virtual ~CacheStats(); 00048 00050 static void InitStats(StringPiece prefix, Statistics* statistics); 00051 00052 virtual void Get(const GoogleString& key, Callback* callback); 00053 virtual void MultiGet(MultiGetRequest* request); 00054 virtual void Put(const GoogleString& key, SharedString* value); 00055 virtual void Delete(const GoogleString& key); 00056 virtual CacheInterface* Backend() { return cache_; } 00057 virtual bool IsBlocking() const { return cache_->IsBlocking(); } 00058 00059 virtual bool IsHealthy() const { 00060 return !shutdown_.value() && cache_->IsHealthy(); 00061 } 00062 00063 virtual void ShutDown() { 00064 shutdown_.set_value(true); 00065 cache_->ShutDown(); 00066 } 00067 00068 virtual GoogleString Name() const { 00069 return FormatName(prefix_, cache_->Name()); 00070 } 00071 static GoogleString FormatName(StringPiece prefix, StringPiece cache); 00072 00073 private: 00074 class StatsCallback; 00075 friend class StatsCallback; 00076 00077 CacheInterface* cache_; 00078 Timer* timer_; 00079 Histogram* get_count_histogram_; 00080 Histogram* hit_latency_us_histogram_; 00081 Histogram* insert_latency_us_histogram_; 00082 Histogram* insert_size_bytes_histogram_; 00083 Histogram* lookup_size_bytes_histogram_; 00084 Variable* deletes_; 00085 Variable* hits_; 00086 Variable* inserts_; 00087 Variable* misses_; 00088 GoogleString prefix_; 00089 AtomicBool shutdown_; 00090 00091 DISALLOW_COPY_AND_ASSIGN(CacheStats); 00092 }; 00093 00094 } 00095 00096 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_CACHE_STATS_H_