1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/browser/predictors/predictor_database.h" 6 7 #include "base/bind.h" 8 #include "base/file_util.h" 9 #include "base/files/file_path.h" 10 #include "base/logging.h" 11 #include "base/metrics/histogram.h" 12 #include "base/strings/stringprintf.h" 13 #include "chrome/browser/predictors/autocomplete_action_predictor_table.h" 14 #include "chrome/browser/predictors/logged_in_predictor_table.h" 15 #include "chrome/browser/predictors/resource_prefetch_predictor.h" 16 #include "chrome/browser/predictors/resource_prefetch_predictor_tables.h" 17 #include "chrome/browser/prerender/prerender_field_trial.h" 18 #include "chrome/browser/profiles/profile.h" 19 #include "content/public/browser/browser_thread.h" 20 #include "sql/connection.h" 21 #include "sql/statement.h" 22 23 using content::BrowserThread; 24 25 namespace { 26 27 // TODO(shishir): This should move to a more generic name. 28 const base::FilePath::CharType kPredictorDatabaseName[] = 29 FILE_PATH_LITERAL("Network Action Predictor"); 30 31 } // namespace 32 33 namespace predictors { 34 35 // Refcounted as it is created, initialized and destroyed on a different thread 36 // to the DB thread that is required for all methods performing database access. 37 class PredictorDatabaseInternal 38 : public base::RefCountedThreadSafe<PredictorDatabaseInternal> { 39 private: 40 friend class base::RefCountedThreadSafe<PredictorDatabaseInternal>; 41 friend class PredictorDatabase; 42 43 explicit PredictorDatabaseInternal(Profile* profile); 44 virtual ~PredictorDatabaseInternal(); 45 46 // Opens the database file from the profile path. Separated from the 47 // constructor to ease construction/destruction of this object on one thread 48 // but database access on the DB thread. 49 void Initialize(); 50 void LogDatabaseStats(); // DB Thread. 51 52 // Cancels pending DB transactions. Should only be called on the UI thread. 53 void SetCancelled(); 54 55 bool is_resource_prefetch_predictor_enabled_; 56 base::FilePath db_path_; 57 scoped_ptr<sql::Connection> db_; 58 59 // TODO(shishir): These tables may not need to be refcounted. Maybe move them 60 // to using a WeakPtr instead. 61 scoped_refptr<AutocompleteActionPredictorTable> autocomplete_table_; 62 scoped_refptr<LoggedInPredictorTable> logged_in_table_; 63 scoped_refptr<ResourcePrefetchPredictorTables> resource_prefetch_tables_; 64 65 DISALLOW_COPY_AND_ASSIGN(PredictorDatabaseInternal); 66 }; 67 68 69 PredictorDatabaseInternal::PredictorDatabaseInternal(Profile* profile) 70 : db_path_(profile->GetPath().Append(kPredictorDatabaseName)), 71 db_(new sql::Connection()), 72 autocomplete_table_(new AutocompleteActionPredictorTable()), 73 logged_in_table_(new LoggedInPredictorTable()), 74 resource_prefetch_tables_(new ResourcePrefetchPredictorTables()) { 75 db_->set_histogram_tag("Predictor"); 76 ResourcePrefetchPredictorConfig config; 77 is_resource_prefetch_predictor_enabled_ = 78 IsSpeculativeResourcePrefetchingEnabled(profile, &config); 79 } 80 81 PredictorDatabaseInternal::~PredictorDatabaseInternal() { 82 // The connection pointer needs to be deleted on the DB thread since there 83 // might be a task in progress on the DB thread which uses this connection. 84 BrowserThread::DeleteSoon(BrowserThread::DB, FROM_HERE, db_.release()); 85 } 86 87 void PredictorDatabaseInternal::Initialize() { 88 CHECK(BrowserThread::CurrentlyOn(BrowserThread::DB)); 89 // TODO(tburkard): figure out if we need this. 90 // db_->set_exclusive_locking(); 91 bool success = db_->Open(db_path_); 92 93 if (!success) 94 return; 95 96 autocomplete_table_->Initialize(db_.get()); 97 logged_in_table_->Initialize(db_.get()); 98 resource_prefetch_tables_->Initialize(db_.get()); 99 100 LogDatabaseStats(); 101 } 102 103 void PredictorDatabaseInternal::SetCancelled() { 104 CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 105 106 autocomplete_table_->SetCancelled(); 107 logged_in_table_->SetCancelled(); 108 resource_prefetch_tables_->SetCancelled(); 109 } 110 111 void PredictorDatabaseInternal::LogDatabaseStats() { 112 CHECK(BrowserThread::CurrentlyOn(BrowserThread::DB)); 113 114 int64 db_size; 115 bool success = file_util::GetFileSize(db_path_, &db_size); 116 DCHECK(success) << "Failed to get file size for " << db_path_.value(); 117 UMA_HISTOGRAM_MEMORY_KB("PredictorDatabase.DatabaseSizeKB", 118 static_cast<int>(db_size / 1024)); 119 120 autocomplete_table_->LogDatabaseStats(); 121 logged_in_table_->LogDatabaseStats(); 122 if (is_resource_prefetch_predictor_enabled_) 123 resource_prefetch_tables_->LogDatabaseStats(); 124 } 125 126 PredictorDatabase::PredictorDatabase(Profile* profile) 127 : db_(new PredictorDatabaseInternal(profile)) { 128 BrowserThread::PostTask(BrowserThread::DB, FROM_HERE, 129 base::Bind(&PredictorDatabaseInternal::Initialize, db_)); 130 } 131 132 PredictorDatabase::~PredictorDatabase() { 133 } 134 135 void PredictorDatabase::Shutdown() { 136 db_->SetCancelled(); 137 } 138 139 scoped_refptr<AutocompleteActionPredictorTable> 140 PredictorDatabase::autocomplete_table() { 141 return db_->autocomplete_table_; 142 } 143 144 scoped_refptr<LoggedInPredictorTable> 145 PredictorDatabase::logged_in_table() { 146 return db_->logged_in_table_; 147 } 148 149 scoped_refptr<ResourcePrefetchPredictorTables> 150 PredictorDatabase::resource_prefetch_tables() { 151 return db_->resource_prefetch_tables_; 152 } 153 154 sql::Connection* PredictorDatabase::GetDatabase() { 155 return db_->db_.get(); 156 } 157 158 } // namespace predictors 159
