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| 1 // Copyright 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 "sync/syncable/syncable_write_transaction.h" | |
| 6 | |
| 7 #include <stdint.h> | |
| 8 | |
| 9 #include <string> | |
| 10 | |
| 11 #include "sync/syncable/directory.h" | |
| 12 #include "sync/syncable/directory_change_delegate.h" | |
| 13 #include "sync/syncable/mutable_entry.h" | |
| 14 #include "sync/syncable/transaction_observer.h" | |
| 15 #include "sync/syncable/write_transaction_info.h" | |
| 16 | |
| 17 namespace syncer { | |
| 18 namespace syncable { | |
| 19 | |
| 20 const int64_t kInvalidTransactionVersion = -1; | |
| 21 | |
| 22 WriteTransaction::WriteTransaction(const tracked_objects::Location& location, | |
| 23 WriterTag writer, Directory* directory) | |
| 24 : BaseWriteTransaction(location, "WriteTransaction", writer, directory), | |
| 25 transaction_version_(NULL) { | |
| 26 Lock(); | |
| 27 } | |
| 28 | |
| 29 WriteTransaction::WriteTransaction(const tracked_objects::Location& location, | |
| 30 Directory* directory, | |
| 31 int64_t* transaction_version) | |
| 32 : BaseWriteTransaction(location, "WriteTransaction", SYNCAPI, directory), | |
| 33 transaction_version_(transaction_version) { | |
| 34 Lock(); | |
| 35 if (transaction_version_) | |
| 36 *transaction_version_ = kInvalidTransactionVersion; | |
| 37 } | |
| 38 | |
| 39 void WriteTransaction::TrackChangesTo(const EntryKernel* entry) { | |
| 40 if (!entry) { | |
| 41 return; | |
| 42 } | |
| 43 // Insert only if it's not already there. | |
| 44 const int64_t handle = entry->ref(META_HANDLE); | |
| 45 EntryKernelMutationMap::iterator it = mutations_.lower_bound(handle); | |
| 46 if (it == mutations_.end() || it->first != handle) { | |
| 47 mutations_[handle].original = *entry; | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 ImmutableEntryKernelMutationMap WriteTransaction::RecordMutations() { | |
| 52 directory_->kernel()->transaction_mutex.AssertAcquired(); | |
| 53 for (syncable::EntryKernelMutationMap::iterator it = mutations_.begin(); | |
| 54 it != mutations_.end();) { | |
| 55 EntryKernel* kernel = directory()->GetEntryByHandle(it->first); | |
| 56 if (!kernel) { | |
| 57 NOTREACHED(); | |
| 58 continue; | |
| 59 } | |
| 60 if (kernel->is_dirty()) { | |
| 61 it->second.mutated = *kernel; | |
| 62 ++it; | |
| 63 } else { | |
| 64 DCHECK(!it->second.original.is_dirty()); | |
| 65 // Not actually mutated, so erase from |mutations_|. | |
| 66 mutations_.erase(it++); | |
| 67 } | |
| 68 } | |
| 69 return ImmutableEntryKernelMutationMap(&mutations_); | |
| 70 } | |
| 71 | |
| 72 void WriteTransaction::UnlockAndNotify( | |
| 73 const ImmutableEntryKernelMutationMap& mutations) { | |
| 74 // Work while transaction mutex is held. | |
| 75 ModelTypeSet models_with_changes; | |
| 76 bool has_mutations = !mutations.Get().empty(); | |
| 77 if (has_mutations) { | |
| 78 models_with_changes = NotifyTransactionChangingAndEnding(mutations); | |
| 79 } | |
| 80 Unlock(); | |
| 81 | |
| 82 // Work after mutex is relased. | |
| 83 if (has_mutations) { | |
| 84 NotifyTransactionComplete(models_with_changes); | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 ModelTypeSet WriteTransaction::NotifyTransactionChangingAndEnding( | |
| 89 const ImmutableEntryKernelMutationMap& mutations) { | |
| 90 directory_->kernel()->transaction_mutex.AssertAcquired(); | |
| 91 DCHECK(!mutations.Get().empty()); | |
| 92 | |
| 93 WriteTransactionInfo write_transaction_info( | |
| 94 directory_->kernel()->next_write_transaction_id, | |
| 95 from_here_, writer_, mutations); | |
| 96 ++directory_->kernel()->next_write_transaction_id; | |
| 97 | |
| 98 ImmutableWriteTransactionInfo immutable_write_transaction_info( | |
| 99 &write_transaction_info); | |
| 100 DirectoryChangeDelegate* const delegate = directory_->kernel()->delegate; | |
| 101 std::vector<int64_t> entry_changed; | |
| 102 if (writer_ == syncable::SYNCAPI) { | |
| 103 delegate->HandleCalculateChangesChangeEventFromSyncApi( | |
| 104 immutable_write_transaction_info, this, &entry_changed); | |
| 105 } else { | |
| 106 delegate->HandleCalculateChangesChangeEventFromSyncer( | |
| 107 immutable_write_transaction_info, this, &entry_changed); | |
| 108 } | |
| 109 UpdateTransactionVersion(entry_changed); | |
| 110 | |
| 111 ModelTypeSet models_with_changes = | |
| 112 delegate->HandleTransactionEndingChangeEvent( | |
| 113 immutable_write_transaction_info, this); | |
| 114 | |
| 115 directory_->kernel()->transaction_observer.Call(FROM_HERE, | |
| 116 &TransactionObserver::OnTransactionWrite, | |
| 117 immutable_write_transaction_info, models_with_changes); | |
| 118 | |
| 119 return models_with_changes; | |
| 120 } | |
| 121 | |
| 122 void WriteTransaction::NotifyTransactionComplete( | |
| 123 ModelTypeSet models_with_changes) { | |
| 124 directory_->kernel()->delegate->HandleTransactionCompleteChangeEvent( | |
| 125 models_with_changes); | |
| 126 } | |
| 127 | |
| 128 void WriteTransaction::UpdateTransactionVersion( | |
| 129 const std::vector<int64_t>& entry_changed) { | |
| 130 syncer::ModelTypeSet type_seen; | |
| 131 for (uint32_t i = 0; i < entry_changed.size(); ++i) { | |
| 132 MutableEntry entry(this, GET_BY_HANDLE, entry_changed[i]); | |
| 133 if (entry.good()) { | |
| 134 ModelType type = GetModelTypeFromSpecifics(entry.GetSpecifics()); | |
| 135 if (type < FIRST_REAL_MODEL_TYPE) | |
| 136 continue; | |
| 137 if (!type_seen.Has(type)) { | |
| 138 directory_->IncrementTransactionVersion(type); | |
| 139 type_seen.Put(type); | |
| 140 } | |
| 141 entry.UpdateTransactionVersion(directory_->GetTransactionVersion(type)); | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 if (!type_seen.Empty() && transaction_version_) { | |
| 146 DCHECK_EQ(1u, type_seen.Size()); | |
| 147 *transaction_version_ = directory_->GetTransactionVersion( | |
| 148 type_seen.First().Get()); | |
| 149 } | |
| 150 } | |
| 151 | |
| 152 WriteTransaction::~WriteTransaction() { | |
| 153 const ImmutableEntryKernelMutationMap& mutations = RecordMutations(); | |
| 154 | |
| 155 MetahandleSet modified_handles; | |
| 156 for (EntryKernelMutationMap::const_iterator i = mutations.Get().begin(); | |
| 157 i != mutations.Get().end(); ++i) { | |
| 158 modified_handles.insert(i->first); | |
| 159 } | |
| 160 directory()->CheckInvariantsOnTransactionClose(this, modified_handles); | |
| 161 | |
| 162 // |CheckTreeInvariants| could have thrown an unrecoverable error. | |
| 163 if (unrecoverable_error_set_) { | |
| 164 HandleUnrecoverableErrorIfSet(); | |
| 165 Unlock(); | |
| 166 return; | |
| 167 } | |
| 168 | |
| 169 UnlockAndNotify(mutations); | |
| 170 } | |
| 171 | |
| 172 #define ENUM_CASE(x) case x: return #x; break | |
| 173 | |
| 174 std::string WriterTagToString(WriterTag writer_tag) { | |
| 175 switch (writer_tag) { | |
| 176 ENUM_CASE(INVALID); | |
| 177 ENUM_CASE(SYNCER); | |
| 178 ENUM_CASE(AUTHWATCHER); | |
| 179 ENUM_CASE(UNITTEST); | |
| 180 ENUM_CASE(VACUUM_AFTER_SAVE); | |
| 181 ENUM_CASE(HANDLE_SAVE_FAILURE); | |
| 182 ENUM_CASE(PURGE_ENTRIES); | |
| 183 ENUM_CASE(SYNCAPI); | |
| 184 } | |
| 185 NOTREACHED(); | |
| 186 return std::string(); | |
| 187 } | |
| 188 | |
| 189 #undef ENUM_CASE | |
| 190 | |
| 191 } // namespace syncable | |
| 192 } // namespace syncer | |
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Chromium Code Reviews
Issue 2130453004:
[Sync] Move //sync to //components/sync. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master