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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/budget_service/budget_database.h" | 5 #include "chrome/browser/budget_service/budget_database.h" |
6 | 6 |
7 #include "base/containers/adapters.h" | 7 #include "base/containers/adapters.h" |
8 #include "base/time/clock.h" | 8 #include "base/time/clock.h" |
9 #include "base/time/default_clock.h" | 9 #include "base/time/default_clock.h" |
10 #include "chrome/browser/budget_service/budget.pb.h" | 10 #include "chrome/browser/budget_service/budget.pb.h" |
11 #include "components/leveldb_proto/proto_database_impl.h" | 11 #include "components/leveldb_proto/proto_database_impl.h" |
12 #include "content/public/browser/browser_thread.h" | 12 #include "content/public/browser/browser_thread.h" |
13 #include "url/gurl.h" | 13 #include "url/gurl.h" |
14 | 14 |
15 using content::BrowserThread; | 15 using content::BrowserThread; |
16 | 16 |
17 namespace { | 17 namespace { |
18 | 18 |
19 // UMA are logged for the database with this string as part of the name. | 19 // UMA are logged for the database with this string as part of the name. |
20 // They will be LevelDB.*.BudgetManager. Changes here should be synchronized | 20 // They will be LevelDB.*.BudgetManager. Changes here should be synchronized |
21 // with histograms.xml. | 21 // with histograms.xml. |
22 const char kDatabaseUMAName[] = "BudgetManager"; | 22 const char kDatabaseUMAName[] = "BudgetManager"; |
23 | 23 |
24 // The default amount of time during which a budget will be valid. | 24 // The default amount of time during which a budget will be valid. |
25 // This is 3 days = 72 hours. | 25 // This is 3 days = 72 hours. |
26 constexpr double kBudgetDurationInHours = 72; | 26 constexpr double kBudgetDurationInHours = 72; |
27 | 27 |
28 } // namespace | 28 } // namespace |
29 | 29 |
30 BudgetDatabase::BudgetInfo::BudgetInfo() {} | |
31 | |
32 BudgetDatabase::BudgetInfo::BudgetInfo(const BudgetInfo&& other) | |
33 : last_engagement_award(other.last_engagement_award) { | |
34 chunks = std::move(other.chunks); | |
35 } | |
36 | |
37 BudgetDatabase::BudgetInfo::~BudgetInfo() {} | |
38 | |
30 BudgetDatabase::BudgetDatabase( | 39 BudgetDatabase::BudgetDatabase( |
31 const base::FilePath& database_dir, | 40 const base::FilePath& database_dir, |
32 const scoped_refptr<base::SequencedTaskRunner>& task_runner) | 41 const scoped_refptr<base::SequencedTaskRunner>& task_runner) |
33 : db_(new leveldb_proto::ProtoDatabaseImpl<budget_service::Budget>( | 42 : db_(new leveldb_proto::ProtoDatabaseImpl<budget_service::Budget>( |
34 task_runner)), | 43 task_runner)), |
35 clock_(base::WrapUnique(new base::DefaultClock)), | 44 clock_(base::WrapUnique(new base::DefaultClock)), |
36 weak_ptr_factory_(this) { | 45 weak_ptr_factory_(this) { |
37 db_->Init(kDatabaseUMAName, database_dir, | 46 db_->Init(kDatabaseUMAName, database_dir, |
38 base::Bind(&BudgetDatabase::OnDatabaseInit, | 47 base::Bind(&BudgetDatabase::OnDatabaseInit, |
39 weak_ptr_factory_.GetWeakPtr())); | 48 weak_ptr_factory_.GetWeakPtr())); |
(...skipping 25 matching lines...) Expand all Loading... | |
65 } | 74 } |
66 | 75 |
67 void BudgetDatabase::AddBudget(const GURL& origin, | 76 void BudgetDatabase::AddBudget(const GURL& origin, |
68 double amount, | 77 double amount, |
69 const StoreBudgetCallback& callback) { | 78 const StoreBudgetCallback& callback) { |
70 DCHECK_EQ(origin.GetOrigin(), origin); | 79 DCHECK_EQ(origin.GetOrigin(), origin); |
71 | 80 |
72 // Add a new chunk of budget for the origin at the default expiration time. | 81 // Add a new chunk of budget for the origin at the default expiration time. |
73 base::Time expiration = | 82 base::Time expiration = |
74 clock_->Now() + base::TimeDelta::FromHours(kBudgetDurationInHours); | 83 clock_->Now() + base::TimeDelta::FromHours(kBudgetDurationInHours); |
75 budget_map_[origin.spec()].emplace_back(amount, expiration); | 84 budget_map_[origin.spec()].chunks.emplace_back(amount, expiration); |
76 | 85 |
77 // Now that the cache is updated, write the data to the database. | 86 // Now that the cache is updated, write the data to the database. |
78 WriteCachedValuesToDatabase(origin, callback); | 87 WriteCachedValuesToDatabase(origin, callback); |
79 } | 88 } |
80 | 89 |
90 void BudgetDatabase::AddEngagementBudget(const GURL& origin, | |
91 double sesScore, | |
Peter Beverloo
2016/08/22 18:04:27
nit: s/sesScore/score/
harkness
2016/08/23 09:55:55
Done.
| |
92 const StoreBudgetCallback& callback) { | |
93 DCHECK_EQ(origin.GetOrigin(), origin); | |
94 | |
95 // By default we award the "full" award. Then that ratio is decreased if | |
96 // there have been other awards recently. | |
97 double awardRatio = 1.0; | |
Peter Beverloo
2016/08/22 18:04:27
nit: s/awardRatio/ratio/
harkness
2016/08/23 09:55:55
Done.
| |
98 | |
99 // Calculate how much budget should be awarded. If the origin is not cached, | |
100 // then we award a full amount. | |
101 if (IsCached(origin)) { | |
102 base::TimeDelta elapsed = | |
103 clock_->Now() - budget_map_[origin.spec()].last_engagement_award; | |
104 int elapsedHours = elapsed.InHours(); | |
Peter Beverloo
2016/08/22 18:04:27
nit: s/elapsedHours/elapsed_hours/
It'd be amazin
harkness
2016/08/23 09:55:55
I'm not sure whether you or I would appreciate tha
| |
105 if (elapsedHours == 0) { | |
106 // Don't give engagement awards for periods less than an hour. | |
107 callback.Run(true); | |
108 return; | |
109 } | |
110 if (elapsedHours < kBudgetDurationInHours) | |
111 awardRatio = elapsedHours / kBudgetDurationInHours; | |
112 } | |
113 | |
114 // Update the last_engagement_award to the current time. If the origin wasn't | |
115 // already in the map, this adds a new entry for it. | |
116 budget_map_[origin.spec()].last_engagement_award = clock_->Now(); | |
117 | |
118 // Pass to the base AddBudget to update the cache and write to the database. | |
119 AddBudget(origin, sesScore * awardRatio, callback); | |
120 } | |
121 | |
122 void BudgetDatabase::SpendBudget(const GURL& origin, | |
123 double amount, | |
124 const StoreBudgetCallback& callback) { | |
125 DCHECK_EQ(origin.GetOrigin(), origin); | |
126 | |
127 // First, cleanup any expired budget chunks for the origin. | |
128 CleanupExpiredBudget(origin); | |
129 | |
130 if (!IsCached(origin)) { | |
131 callback.Run(false); | |
132 return; | |
133 } | |
134 | |
135 // Walk the list of budget chunks to see if the origin has enough budget. | |
136 double total = 0; | |
137 auto& info = budget_map_[origin.spec()]; | |
johnme
2016/08/22 14:50:31
consistency.
https://google.github.io/styleguide/
harkness
2016/08/23 09:55:56
Done.
| |
138 for (const auto& chunk : info.chunks) | |
139 total += chunk.amount; | |
140 | |
141 if (total < amount) { | |
142 callback.Run(false); | |
143 return; | |
144 } | |
145 | |
146 // Walk the chunks and remove enough budget to cover the needed amount. | |
147 double bill = amount; | |
148 BudgetChunks::iterator chunkIter; | |
149 for (chunkIter = info.chunks.begin(); chunkIter != info.chunks.end(); | |
150 chunkIter++) { | |
johnme
2016/08/22 14:50:31
Always ++it not it++ with iterators to avoid copyi
harkness
2016/08/23 09:55:55
Done.
| |
151 if (chunkIter->amount > bill) { | |
152 chunkIter->amount -= bill; | |
153 bill = 0; | |
154 break; | |
155 } | |
156 bill -= chunkIter->amount; | |
157 } | |
158 info.chunks.erase(info.chunks.begin(), chunkIter); | |
johnme
2016/08/22 14:50:31
Now that you're using a std::list, and since you k
harkness
2016/08/23 09:55:56
Done.
| |
159 | |
160 // There should have been enough budget to cover the entire bill. | |
161 DCHECK_EQ(0, bill); | |
162 | |
163 // Now that the cache is updated, write the data to the database. | |
164 // TODO(harkness): Consider adding a second parameter to the callback so the | |
165 // caller can distinguish between not enough budget and a failed database | |
166 // write. | |
167 // TODO(harkness): If the database write fails, the cache will be out of sync | |
168 // with the database. Consider ways to mitigate this. | |
169 WriteCachedValuesToDatabase(origin, callback); | |
170 } | |
171 | |
81 void BudgetDatabase::OnDatabaseInit(bool success) { | 172 void BudgetDatabase::OnDatabaseInit(bool success) { |
82 // TODO(harkness): Consider caching the budget database now? | 173 // TODO(harkness): Consider caching the budget database now? |
83 } | 174 } |
84 | 175 |
85 bool BudgetDatabase::IsCached(const GURL& origin) const { | 176 bool BudgetDatabase::IsCached(const GURL& origin) const { |
86 return budget_map_.find(origin.spec()) != budget_map_.end(); | 177 return budget_map_.find(origin.spec()) != budget_map_.end(); |
87 } | 178 } |
88 | 179 |
89 void BudgetDatabase::AddToCache( | 180 void BudgetDatabase::AddToCache( |
90 const GURL& origin, | 181 const GURL& origin, |
91 const AddToCacheCallback& callback, | 182 const AddToCacheCallback& callback, |
92 bool success, | 183 bool success, |
93 std::unique_ptr<budget_service::Budget> budget_proto) { | 184 std::unique_ptr<budget_service::Budget> budget_proto) { |
94 // If the database read failed, there's nothing to add to the cache. | 185 // If the database read failed, there's nothing to add to the cache. |
95 if (!success || !budget_proto) { | 186 if (!success || !budget_proto) { |
96 callback.Run(success); | 187 callback.Run(success); |
97 return; | 188 return; |
98 } | 189 } |
99 | 190 |
100 // Add the data to the cache, converting from the proto format to an STL | 191 // Add the data to the cache, converting from the proto format to an STL |
101 // format which is better for removing things from the list. | 192 // format which is better for removing things from the list. |
102 BudgetChunks chunks; | 193 BudgetInfo& info = budget_map_[origin.spec()]; |
194 BudgetChunks& chunks = info.chunks; | |
johnme
2016/08/22 14:50:31
Micro-nit: you only use this variable once - inlin
harkness
2016/08/23 09:55:55
Done.
| |
103 for (const auto& chunk : budget_proto->budget()) { | 195 for (const auto& chunk : budget_proto->budget()) { |
104 chunks.emplace_back(chunk.amount(), | 196 chunks.emplace_back(chunk.amount(), |
105 base::Time::FromInternalValue(chunk.expiration())); | 197 base::Time::FromInternalValue(chunk.expiration())); |
106 } | 198 } |
107 | 199 |
108 budget_map_[origin.spec()] = std::move(chunks); | 200 info.last_engagement_award = |
201 base::Time::FromInternalValue(budget_proto->engagement_last_updated()); | |
109 | 202 |
110 callback.Run(success); | 203 callback.Run(success); |
111 } | 204 } |
112 | 205 |
113 void BudgetDatabase::DidGetBudget(const GURL& origin, | 206 void BudgetDatabase::DidGetBudget(const GURL& origin, |
114 const GetBudgetDetailsCallback& callback, | 207 const GetBudgetDetailsCallback& callback, |
115 bool success) { | 208 bool success) { |
116 // If the database wasn't able to read the information, return the | 209 // If the database wasn't able to read the information, return the |
117 // failure and an empty BudgetExpectation. | 210 // failure and an empty BudgetPrediction. |
118 if (!success) { | 211 if (!success) { |
119 callback.Run(success, BudgetExpectation()); | 212 callback.Run(success, BudgetPrediction()); |
120 return; | 213 return; |
121 } | 214 } |
122 | 215 |
123 // First, cleanup any expired budget chunks for the origin. | 216 // First, cleanup any expired budget chunks for the origin. |
124 CleanupExpiredBudget(origin); | 217 CleanupExpiredBudget(origin); |
125 | 218 |
126 // Now, build up the BudgetExpection. This is different from the format | 219 // Now, build up the BudgetExpection. This is different from the format |
127 // in which the cache stores the data. The cache stores chunks of budget and | 220 // in which the cache stores the data. The cache stores chunks of budget and |
128 // when that budget expires. The BudgetExpectation describes a set of times | 221 // when that budget expires. The BudgetPrediction describes a set of times |
129 // and the budget at those times. | 222 // and the budget at those times. |
130 BudgetExpectation expectation; | 223 BudgetPrediction prediction; |
131 double total = 0; | 224 double total = 0; |
132 | 225 |
133 if (IsCached(origin)) { | 226 if (IsCached(origin)) { |
134 // Starting with the chunks that expire the farthest in the future, build up | 227 // Starting with the chunks that expire the farthest in the future, build up |
135 // the budget expectations for those future times. | 228 // the budget predictions for those future times. |
136 const BudgetChunks& chunks = budget_map_[origin.spec()]; | 229 const BudgetChunks& chunks = budget_map_[origin.spec()].chunks; |
137 for (const auto& chunk : base::Reversed(chunks)) { | 230 for (const auto& chunk : base::Reversed(chunks)) { |
138 expectation.emplace_front(total, chunk.expiration); | 231 prediction.emplace_front(total, chunk.expiration); |
139 total += chunk.amount; | 232 total += chunk.amount; |
140 } | 233 } |
141 } | 234 } |
142 | 235 |
143 // Always add one entry at the front of the list for the total budget now. | 236 // Always add one entry at the front of the list for the total budget now. |
144 expectation.emplace_front(total, clock_->Now()); | 237 prediction.emplace_front(total, clock_->Now()); |
145 | 238 |
146 callback.Run(true /* success */, expectation); | 239 callback.Run(true /* success */, prediction); |
147 } | 240 } |
148 | 241 |
149 void BudgetDatabase::SetClockForTesting(std::unique_ptr<base::Clock> clock) { | 242 void BudgetDatabase::SetClockForTesting(std::unique_ptr<base::Clock> clock) { |
150 clock_ = std::move(clock); | 243 clock_ = std::move(clock); |
151 } | 244 } |
152 | 245 |
153 void BudgetDatabase::WriteCachedValuesToDatabase( | 246 void BudgetDatabase::WriteCachedValuesToDatabase( |
154 const GURL& origin, | 247 const GURL& origin, |
155 const StoreBudgetCallback& callback) { | 248 const StoreBudgetCallback& callback) { |
156 // First, cleanup any expired budget chunks for the origin. | 249 // First, cleanup any expired budget chunks for the origin. |
157 CleanupExpiredBudget(origin); | 250 CleanupExpiredBudget(origin); |
158 | 251 |
159 // Create the data structures that are passed to the ProtoDatabase. | 252 // Create the data structures that are passed to the ProtoDatabase. |
160 std::unique_ptr< | 253 std::unique_ptr< |
161 leveldb_proto::ProtoDatabase<budget_service::Budget>::KeyEntryVector> | 254 leveldb_proto::ProtoDatabase<budget_service::Budget>::KeyEntryVector> |
162 entries(new leveldb_proto::ProtoDatabase< | 255 entries(new leveldb_proto::ProtoDatabase< |
163 budget_service::Budget>::KeyEntryVector()); | 256 budget_service::Budget>::KeyEntryVector()); |
164 std::unique_ptr<std::vector<std::string>> keys_to_remove( | 257 std::unique_ptr<std::vector<std::string>> keys_to_remove( |
165 new std::vector<std::string>()); | 258 new std::vector<std::string>()); |
166 | 259 |
167 // Each operation can either update the existing budget or remove the origin's | 260 // Each operation can either update the existing budget or remove the origin's |
168 // budget information. | 261 // budget information. |
169 if (IsCached(origin)) { | 262 if (IsCached(origin)) { |
170 // Build the Budget proto object. | 263 // Build the Budget proto object. |
171 budget_service::Budget budget; | 264 budget_service::Budget budget; |
172 const BudgetChunks& chunks = budget_map_[origin.spec()]; | 265 const BudgetInfo& info = budget_map_[origin.spec()]; |
173 for (const auto& chunk : chunks) { | 266 for (const auto& chunk : info.chunks) { |
174 budget_service::BudgetChunk* budget_chunk = budget.add_budget(); | 267 budget_service::BudgetChunk* budget_chunk = budget.add_budget(); |
175 budget_chunk->set_amount(chunk.amount); | 268 budget_chunk->set_amount(chunk.amount); |
176 budget_chunk->set_expiration(chunk.expiration.ToInternalValue()); | 269 budget_chunk->set_expiration(chunk.expiration.ToInternalValue()); |
177 } | 270 } |
271 budget.set_engagement_last_updated( | |
272 info.last_engagement_award.ToInternalValue()); | |
178 entries->push_back(std::make_pair(origin.spec(), budget)); | 273 entries->push_back(std::make_pair(origin.spec(), budget)); |
179 } else { | 274 } else { |
180 // If the origin doesn't exist in the cache, this is a remove operation. | 275 // If the origin doesn't exist in the cache, this is a remove operation. |
181 keys_to_remove->push_back(origin.spec()); | 276 keys_to_remove->push_back(origin.spec()); |
182 } | 277 } |
183 | 278 |
184 // Send the updates to the database. | 279 // Send the updates to the database. |
185 db_->UpdateEntries(std::move(entries), std::move(keys_to_remove), callback); | 280 db_->UpdateEntries(std::move(entries), std::move(keys_to_remove), callback); |
186 } | 281 } |
187 | 282 |
188 void BudgetDatabase::CleanupExpiredBudget(const GURL& origin) { | 283 void BudgetDatabase::CleanupExpiredBudget(const GURL& origin) { |
189 if (!IsCached(origin)) | 284 if (!IsCached(origin)) |
190 return; | 285 return; |
191 | 286 |
192 base::Time now = clock_->Now(); | 287 base::Time now = clock_->Now(); |
193 | 288 |
194 BudgetChunks& chunks = budget_map_[origin.spec()]; | 289 BudgetChunks& chunks = budget_map_[origin.spec()].chunks; |
195 auto cleanup_iter = chunks.begin(); | 290 auto cleanup_iter = chunks.begin(); |
196 | 291 |
197 // This relies on the list of chunks being in timestamp order. | 292 // This relies on the list of chunks being in timestamp order. |
198 while (cleanup_iter != chunks.end() && cleanup_iter->expiration <= now) | 293 while (cleanup_iter != chunks.end() && cleanup_iter->expiration <= now) |
199 cleanup_iter = chunks.erase(cleanup_iter); | 294 cleanup_iter = chunks.erase(cleanup_iter); |
200 | 295 |
201 // If the entire budget is empty now, cleanup the map. | 296 // If the entire budget is empty now AND there have been no engagements |
202 if (chunks.empty()) | 297 // in the last kBudgetDurationInHours hours, remove this from the cache. |
298 if (chunks.empty() && | |
299 budget_map_[origin.spec()].last_engagement_award < | |
300 clock_->Now() - base::TimeDelta::FromHours(kBudgetDurationInHours)) | |
203 budget_map_.erase(origin.spec()); | 301 budget_map_.erase(origin.spec()); |
204 } | 302 } |
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