Page Speed Optimization Libraries
1.2.24.1
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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 00021 00022 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_OUTPUT_RESOURCE_H_ 00023 #define NET_INSTAWEB_REWRITER_PUBLIC_OUTPUT_RESOURCE_H_ 00024 00025 #include "base/logging.h" 00026 #include "net/instaweb/rewriter/public/output_resource_kind.h" 00027 #include "net/instaweb/rewriter/public/resource.h" 00028 #include "net/instaweb/rewriter/public/resource_namer.h" 00029 #include "net/instaweb/util/public/basictypes.h" 00030 #include "net/instaweb/util/public/queued_worker_pool.h" 00031 #include "net/instaweb/util/public/ref_counted_ptr.h" 00032 #include "net/instaweb/util/public/scoped_ptr.h" 00033 #include "net/instaweb/util/public/string.h" 00034 #include "net/instaweb/util/public/string_util.h" 00035 00036 namespace net_instaweb { 00037 00038 class CachedResult; 00039 class Function; 00040 class MessageHandler; 00041 class NamedLock; 00042 class ServerContext; 00043 class RewriteOptions; 00044 class Writer; 00045 struct ContentType; 00046 00047 class OutputResource : public Resource { 00048 public: 00057 OutputResource(ServerContext* server_context, 00058 const StringPiece& resolved_base, 00059 const StringPiece& unmapped_base, 00060 const StringPiece& original_base, 00061 const ResourceNamer& resource_id, 00062 const RewriteOptions* options, 00063 OutputResourceKind kind); 00064 00065 virtual bool Load(MessageHandler* message_handler); 00069 virtual GoogleString url() const; 00073 GoogleString UrlEvenIfHashNotSet(); 00074 00079 void DumpToDisk(MessageHandler* handler); 00080 00085 NamedLock* CreationLock(); 00086 00089 bool TryLockForCreation(); 00090 00094 void LockForCreation(QueuedWorkerPool::Sequence* worker, Function* callback); 00095 00097 void DropCreationLock(); 00098 00101 void UpdateCachedResultPreservingInputInfo(CachedResult* to_update) const; 00102 00116 virtual GoogleString name_key() const; 00117 00127 GoogleString HttpCacheKey() const; 00128 00130 const GoogleString& resolved_base() const { return resolved_base_; } 00131 const GoogleString& unmapped_base() const { return unmapped_base_; } 00132 const GoogleString& original_base() const { return original_base_; } 00133 const ResourceNamer& full_name() const { return full_name_; } 00134 StringPiece name() const { return full_name_.name(); } 00135 StringPiece experiment() const { return full_name_.experiment(); } 00136 StringPiece suffix() const; 00137 StringPiece filter_prefix() const { return full_name_.id(); } 00138 StringPiece hash() const { return full_name_.hash(); } 00139 bool has_hash() const { return !hash().empty(); } 00140 00150 GoogleString decoded_base() const; 00151 00159 bool IsWritten() const; 00160 00162 virtual void SetType(const ContentType* type); 00163 00176 const CachedResult* cached_result() const { return cached_result_; } 00177 00185 CachedResult* EnsureCachedResultCreated(); 00186 00187 void clear_cached_result(); 00188 00191 void set_cached_result(CachedResult* cached_result) { 00192 clear_cached_result(); 00193 cached_result_ = cached_result; 00194 } 00195 00197 CachedResult* ReleaseCachedResult() { 00198 CHECK(cached_result_owned_); 00199 CachedResult* ret = cached_result_; 00200 cached_result_ = NULL; 00201 cached_result_owned_ = false; 00202 return ret; 00203 } 00204 00205 OutputResourceKind kind() const { return kind_; } 00206 00207 bool has_lock() const; 00208 00210 void set_written(bool written) { writing_complete_ = true; } 00211 00212 virtual const RewriteOptions* rewrite_options() const { 00213 return rewrite_options_; 00214 } 00215 00219 Writer* BeginWrite(MessageHandler* message_handler); 00220 void EndWrite(MessageHandler* message_handler); 00221 00222 protected: 00223 virtual ~OutputResource(); 00224 REFCOUNT_FRIEND_DECLARATION(OutputResource); 00225 00226 private: 00227 friend class ResourceManagerTestingPeer; 00228 friend class RewriteDriver; 00229 friend class ServerContext; 00230 friend class ServerContextTest; 00231 00232 void SetHash(const StringPiece& hash); 00233 StringPiece extension() const { return full_name_.ext(); } 00234 00236 GoogleString DumpFileName() const; 00237 00238 bool writing_complete_; 00239 00246 bool cached_result_owned_; 00247 CachedResult* cached_result_; 00248 00267 GoogleString resolved_base_; 00268 GoogleString unmapped_base_; 00269 GoogleString original_base_; 00270 00271 ResourceNamer full_name_; 00272 00274 mutable GoogleString computed_url_; 00275 00278 scoped_ptr<NamedLock> creation_lock_; 00279 00280 const RewriteOptions* rewrite_options_; 00281 00284 OutputResourceKind kind_; 00285 00286 DISALLOW_COPY_AND_ASSIGN(OutputResource); 00287 }; 00288 00289 } 00290 00291 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_OUTPUT_RESOURCE_H_