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| 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 "sync/syncable/write_transaction.h" | |
| 6 | |
| 7 #include "sync/syncable/directory.h" | |
| 8 #include "sync/syncable/directory_change_delegate.h" | |
| 9 #include "sync/syncable/mutable_entry.h" | |
| 10 #include "sync/syncable/transaction_observer.h" | |
| 11 #include "sync/syncable/write_transaction_info.h" | |
| 12 | |
| 13 namespace syncer { | |
| 14 namespace syncable { | |
| 15 | |
| 16 const int64 kInvalidTransactionVersion = -1; | |
| 17 | |
| 18 WriteTransaction::WriteTransaction(const tracked_objects::Location& location, | |
| 19 WriterTag writer, Directory* directory) | |
| 20 : BaseTransaction(location, "WriteTransaction", writer, directory), | |
| 21 transaction_version_(NULL) { | |
| 22 Lock(); | |
| 23 } | |
| 24 | |
| 25 WriteTransaction::WriteTransaction(const tracked_objects::Location& location, | |
| 26 Directory* directory, | |
| 27 int64* transaction_version) | |
| 28 : BaseTransaction(location, "WriteTransaction", SYNCAPI, directory), | |
| 29 transaction_version_(transaction_version) { | |
| 30 Lock(); | |
| 31 if (transaction_version_) | |
| 32 *transaction_version_ = kInvalidTransactionVersion; | |
| 33 } | |
| 34 | |
| 35 void WriteTransaction::SaveOriginal(const EntryKernel* entry) { | |
| 36 if (!entry) { | |
| 37 return; | |
| 38 } | |
| 39 // Insert only if it's not already there. | |
| 40 const int64 handle = entry->ref(META_HANDLE); | |
| 41 EntryKernelMutationMap::iterator it = mutations_.lower_bound(handle); | |
| 42 if (it == mutations_.end() || it->first != handle) { | |
| 43 EntryKernelMutation mutation; | |
| 44 mutation.original = *entry; | |
| 45 ignore_result(mutations_.insert(it, std::make_pair(handle, mutation))); | |
| 46 } | |
| 47 } | |
| 48 | |
| 49 ImmutableEntryKernelMutationMap WriteTransaction::RecordMutations() { | |
| 50 directory_->kernel_->transaction_mutex.AssertAcquired(); | |
| 51 for (syncable::EntryKernelMutationMap::iterator it = mutations_.begin(); | |
| 52 it != mutations_.end();) { | |
| 53 EntryKernel* kernel = directory()->GetEntryByHandle(it->first); | |
| 54 if (!kernel) { | |
| 55 NOTREACHED(); | |
| 56 continue; | |
| 57 } | |
| 58 if (kernel->is_dirty()) { | |
| 59 it->second.mutated = *kernel; | |
| 60 ++it; | |
| 61 } else { | |
| 62 DCHECK(!it->second.original.is_dirty()); | |
| 63 // Not actually mutated, so erase from |mutations_|. | |
| 64 mutations_.erase(it++); | |
| 65 } | |
| 66 } | |
| 67 return ImmutableEntryKernelMutationMap(&mutations_); | |
| 68 } | |
| 69 | |
| 70 void WriteTransaction::UnlockAndNotify( | |
| 71 const ImmutableEntryKernelMutationMap& mutations) { | |
| 72 // Work while transaction mutex is held. | |
| 73 ModelTypeSet models_with_changes; | |
| 74 bool has_mutations = !mutations.Get().empty(); | |
| 75 if (has_mutations) { | |
| 76 models_with_changes = NotifyTransactionChangingAndEnding(mutations); | |
| 77 } | |
| 78 Unlock(); | |
| 79 | |
| 80 // Work after mutex is relased. | |
| 81 if (has_mutations) { | |
| 82 NotifyTransactionComplete(models_with_changes); | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 ModelTypeSet WriteTransaction::NotifyTransactionChangingAndEnding( | |
| 87 const ImmutableEntryKernelMutationMap& mutations) { | |
| 88 directory_->kernel_->transaction_mutex.AssertAcquired(); | |
| 89 DCHECK(!mutations.Get().empty()); | |
| 90 | |
| 91 WriteTransactionInfo write_transaction_info( | |
| 92 directory_->kernel_->next_write_transaction_id, | |
| 93 from_here_, writer_, mutations); | |
| 94 ++directory_->kernel_->next_write_transaction_id; | |
| 95 | |
| 96 ImmutableWriteTransactionInfo immutable_write_transaction_info( | |
| 97 &write_transaction_info); | |
| 98 DirectoryChangeDelegate* const delegate = directory_->kernel_->delegate; | |
| 99 std::vector<int64> entry_changed; | |
| 100 if (writer_ == syncable::SYNCAPI) { | |
| 101 delegate->HandleCalculateChangesChangeEventFromSyncApi( | |
| 102 immutable_write_transaction_info, this, &entry_changed); | |
| 103 } else { | |
| 104 delegate->HandleCalculateChangesChangeEventFromSyncer( | |
| 105 immutable_write_transaction_info, this, &entry_changed); | |
| 106 } | |
| 107 UpdateTransactionVersion(entry_changed); | |
| 108 | |
| 109 ModelTypeSet models_with_changes = | |
| 110 delegate->HandleTransactionEndingChangeEvent( | |
| 111 immutable_write_transaction_info, this); | |
| 112 | |
| 113 directory_->kernel_->transaction_observer.Call(FROM_HERE, | |
| 114 &TransactionObserver::OnTransactionWrite, | |
| 115 immutable_write_transaction_info, models_with_changes); | |
| 116 | |
| 117 return models_with_changes; | |
| 118 } | |
| 119 | |
| 120 void WriteTransaction::NotifyTransactionComplete( | |
| 121 ModelTypeSet models_with_changes) { | |
| 122 directory_->kernel_->delegate->HandleTransactionCompleteChangeEvent( | |
| 123 models_with_changes); | |
| 124 } | |
| 125 | |
| 126 void WriteTransaction::UpdateTransactionVersion( | |
| 127 const std::vector<int64>& entry_changed) { | |
| 128 syncer::ModelTypeSet type_seen; | |
| 129 for (uint32 i = 0; i < entry_changed.size(); ++i) { | |
| 130 MutableEntry entry(this, GET_BY_HANDLE, entry_changed[i]); | |
| 131 if (entry.good()) { | |
| 132 ModelType type = GetModelTypeFromSpecifics(entry.Get(SPECIFICS)); | |
| 133 if (type < FIRST_REAL_MODEL_TYPE) | |
| 134 continue; | |
| 135 if (!type_seen.Has(type)) { | |
| 136 directory_->IncrementTransactionVersion(type); | |
| 137 type_seen.Put(type); | |
| 138 } | |
| 139 entry.Put(TRANSACTION_VERSION, directory_->GetTransactionVersion(type)); | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 if (!type_seen.Empty() && transaction_version_) { | |
| 144 DCHECK_EQ(1u, type_seen.Size()); | |
| 145 *transaction_version_ = directory_->GetTransactionVersion( | |
| 146 type_seen.First().Get()); | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 WriteTransaction::~WriteTransaction() { | |
| 151 const ImmutableEntryKernelMutationMap& mutations = RecordMutations(); | |
| 152 directory()->CheckInvariantsOnTransactionClose(this, mutations.Get()); | |
| 153 | |
| 154 // |CheckTreeInvariants| could have thrown an unrecoverable error. | |
| 155 if (unrecoverable_error_set_) { | |
| 156 HandleUnrecoverableErrorIfSet(); | |
| 157 Unlock(); | |
| 158 return; | |
| 159 } | |
| 160 | |
| 161 UnlockAndNotify(mutations); | |
| 162 } | |
| 163 | |
| 164 #define ENUM_CASE(x) case x: return #x; break | |
| 165 | |
| 166 std::string WriterTagToString(WriterTag writer_tag) { | |
| 167 switch (writer_tag) { | |
| 168 ENUM_CASE(INVALID); | |
| 169 ENUM_CASE(SYNCER); | |
| 170 ENUM_CASE(AUTHWATCHER); | |
| 171 ENUM_CASE(UNITTEST); | |
| 172 ENUM_CASE(VACUUM_AFTER_SAVE); | |
| 173 ENUM_CASE(PURGE_ENTRIES); | |
| 174 ENUM_CASE(SYNCAPI); | |
| 175 }; | |
| 176 NOTREACHED(); | |
| 177 return ""; | |
| 178 } | |
| 179 | |
| 180 #undef ENUM_CASE | |
| 181 | |
| 182 } // namespace syncable | |
| 183 } // namespace syncer | |
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Chromium Code Reviews
Issue 11638018:
[sync] Componentize sync: Part 5: Eliminate filename collisions in sync.gyp (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src