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/files/file_path.h" 9#include "base/files/file_util.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 23using content::BrowserThread; 24 25namespace { 26 27// TODO(shishir): This should move to a more generic name. 28const base::FilePath::CharType kPredictorDatabaseName[] = 29 FILE_PATH_LITERAL("Network Action Predictor"); 30 31} // namespace 32 33namespace 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. 37class 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 69PredictorDatabaseInternal::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 81PredictorDatabaseInternal::~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 if (BrowserThread::IsMessageLoopValid(BrowserThread::DB)) 85 BrowserThread::DeleteSoon(BrowserThread::DB, FROM_HERE, db_.release()); 86} 87 88void PredictorDatabaseInternal::Initialize() { 89 CHECK(BrowserThread::CurrentlyOn(BrowserThread::DB) || 90 !BrowserThread::IsMessageLoopValid(BrowserThread::DB)); 91 // TODO(tburkard): figure out if we need this. 92 // db_->set_exclusive_locking(); 93 bool success = db_->Open(db_path_); 94 95 if (!success) 96 return; 97 98 autocomplete_table_->Initialize(db_.get()); 99 logged_in_table_->Initialize(db_.get()); 100 resource_prefetch_tables_->Initialize(db_.get()); 101 102 LogDatabaseStats(); 103} 104 105void PredictorDatabaseInternal::SetCancelled() { 106 CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) || 107 !BrowserThread::IsMessageLoopValid(BrowserThread::UI)); 108 109 autocomplete_table_->SetCancelled(); 110 logged_in_table_->SetCancelled(); 111 resource_prefetch_tables_->SetCancelled(); 112} 113 114void PredictorDatabaseInternal::LogDatabaseStats() { 115 CHECK(BrowserThread::CurrentlyOn(BrowserThread::DB) || 116 !BrowserThread::IsMessageLoopValid(BrowserThread::DB)); 117 118 int64 db_size; 119 bool success = base::GetFileSize(db_path_, &db_size); 120 DCHECK(success) << "Failed to get file size for " << db_path_.value(); 121 UMA_HISTOGRAM_MEMORY_KB("PredictorDatabase.DatabaseSizeKB", 122 static_cast<int>(db_size / 1024)); 123 124 autocomplete_table_->LogDatabaseStats(); 125 logged_in_table_->LogDatabaseStats(); 126 if (is_resource_prefetch_predictor_enabled_) 127 resource_prefetch_tables_->LogDatabaseStats(); 128} 129 130PredictorDatabase::PredictorDatabase(Profile* profile) 131 : db_(new PredictorDatabaseInternal(profile)) { 132 BrowserThread::PostTask(BrowserThread::DB, FROM_HERE, 133 base::Bind(&PredictorDatabaseInternal::Initialize, db_)); 134} 135 136PredictorDatabase::~PredictorDatabase() { 137} 138 139void PredictorDatabase::Shutdown() { 140 db_->SetCancelled(); 141} 142 143scoped_refptr<AutocompleteActionPredictorTable> 144 PredictorDatabase::autocomplete_table() { 145 return db_->autocomplete_table_; 146} 147 148scoped_refptr<LoggedInPredictorTable> 149 PredictorDatabase::logged_in_table() { 150 return db_->logged_in_table_; 151} 152 153scoped_refptr<ResourcePrefetchPredictorTables> 154 PredictorDatabase::resource_prefetch_tables() { 155 return db_->resource_prefetch_tables_; 156} 157 158sql::Connection* PredictorDatabase::GetDatabase() { 159 return db_->db_.get(); 160} 161 162} // namespace predictors 163