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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sync/syncable/mutable_entry.h"
#include "base/memory/scoped_ptr.h"
#include "sync/internal_api/public/base/unique_position.h"
#include "sync/syncable/directory.h"
#include "sync/syncable/scoped_kernel_lock.h"
#include "sync/syncable/scoped_parent_child_index_updater.h"
#include "sync/syncable/syncable-inl.h"
#include "sync/syncable/syncable_changes_version.h"
#include "sync/syncable/syncable_util.h"
#include "sync/syncable/syncable_write_transaction.h"
using std::string;
namespace syncer {
namespace syncable {
void MutableEntry::Init(WriteTransaction* trans,
ModelType model_type,
const Id& parent_id,
const string& name) {
scoped_ptr<EntryKernel> kernel(new EntryKernel);
kernel_ = NULL;
kernel->put(ID, trans->directory_->NextId());
kernel->put(META_HANDLE, trans->directory_->NextMetahandle());
kernel->mark_dirty(&trans->directory_->kernel_->dirty_metahandles);
kernel->put(PARENT_ID, parent_id);
kernel->put(NON_UNIQUE_NAME, name);
const base::Time& now = base::Time::Now();
kernel->put(CTIME, now);
kernel->put(MTIME, now);
// We match the database defaults here
kernel->put(BASE_VERSION, CHANGES_VERSION);
// Normally the SPECIFICS setting code is wrapped in logic to deal with
// unknown fields and encryption. Since all we want to do here is ensure that
// GetModelType() returns a correct value from the very beginning, these
// few lines are sufficient.
sync_pb::EntitySpecifics specifics;
AddDefaultFieldValue(model_type, &specifics);
kernel->put(SPECIFICS, specifics);
// Because this entry is new, it was originally deleted.
kernel->put(IS_DEL, true);
trans->TrackChangesTo(kernel.get());
kernel->put(IS_DEL, false);
// Now swap the pointers.
kernel_ = kernel.release();
}
MutableEntry::MutableEntry(WriteTransaction* trans,
Create,
ModelType model_type,
const Id& parent_id,
const string& name)
: ModelNeutralMutableEntry(trans), write_transaction_(trans) {
Init(trans, model_type, parent_id, name);
// We need to have a valid position ready before we can index the item.
if (model_type == BOOKMARKS) {
// Base the tag off of our cache-guid and local "c-" style ID.
std::string unique_tag = syncable::GenerateSyncableBookmarkHash(
trans->directory()->cache_guid(), GetId().GetServerId());
kernel_->put(UNIQUE_BOOKMARK_TAG, unique_tag);
kernel_->put(UNIQUE_POSITION, UniquePosition::InitialPosition(unique_tag));
} else {
DCHECK(!ShouldMaintainPosition());
}
bool result = trans->directory()->InsertEntry(trans, kernel_);
DCHECK(result);
}
MutableEntry::MutableEntry(WriteTransaction* trans, CreateNewUpdateItem,
const Id& id)
: ModelNeutralMutableEntry(trans, CREATE_NEW_UPDATE_ITEM, id),
write_transaction_(trans) {}
MutableEntry::MutableEntry(WriteTransaction* trans, GetById, const Id& id)
: ModelNeutralMutableEntry(trans, GET_BY_ID, id),
write_transaction_(trans) {
}
MutableEntry::MutableEntry(WriteTransaction* trans, GetByHandle,
int64 metahandle)
: ModelNeutralMutableEntry(trans, GET_BY_HANDLE, metahandle),
write_transaction_(trans) {
}
MutableEntry::MutableEntry(WriteTransaction* trans, GetByClientTag,
const std::string& tag)
: ModelNeutralMutableEntry(trans, GET_BY_CLIENT_TAG, tag),
write_transaction_(trans) {
}
MutableEntry::MutableEntry(WriteTransaction* trans, GetByServerTag,
const string& tag)
: ModelNeutralMutableEntry(trans, GET_BY_SERVER_TAG, tag),
write_transaction_(trans) {
}
void MutableEntry::PutLocalExternalId(int64 value) {
DCHECK(kernel_);
write_transaction()->TrackChangesTo(kernel_);
if (kernel_->ref(LOCAL_EXTERNAL_ID) != value) {
ScopedKernelLock lock(dir());
kernel_->put(LOCAL_EXTERNAL_ID, value);
kernel_->mark_dirty(&dir()->kernel_->dirty_metahandles);
}
}
void MutableEntry::PutMtime(base::Time value) {
DCHECK(kernel_);
write_transaction()->TrackChangesTo(kernel_);
if (kernel_->ref(MTIME) != value) {
kernel_->put(MTIME, value);
kernel_->mark_dirty(&dir()->kernel_->dirty_metahandles);
}
}
void MutableEntry::PutCtime(base::Time value) {
DCHECK(kernel_);
write_transaction()->TrackChangesTo(kernel_);
if (kernel_->ref(CTIME) != value) {
kernel_->put(CTIME, value);
kernel_->mark_dirty(&dir()->kernel_->dirty_metahandles);
}
}
void MutableEntry::PutParentId(const Id& value) {
DCHECK(kernel_);
write_transaction()->TrackChangesTo(kernel_);
if (kernel_->ref(PARENT_ID) != value) {
PutParentIdPropertyOnly(value);
if (!GetIsDel()) {
if (!PutPredecessor(Id())) {
// TODO(lipalani) : Propagate the error to caller. crbug.com/100444.
NOTREACHED();
}
}
}
}
void MutableEntry::PutIsDir(bool value) {
DCHECK(kernel_);
write_transaction()->TrackChangesTo(kernel_);
bool old_value = kernel_->ref(IS_DIR);
if (old_value != value) {
kernel_->put(IS_DIR, value);
kernel_->mark_dirty(GetDirtyIndexHelper());
}
}
void MutableEntry::PutIsDel(bool value) {
DCHECK(kernel_);
write_transaction()->TrackChangesTo(kernel_);
if (value == kernel_->ref(IS_DEL)) {
return;
}
if (value) {
// If the server never knew about this item and it's deleted then we don't
// need to keep it around. Unsetting IS_UNSYNCED will:
// - Ensure that the item is never committed to the server.
// - Allow any items with the same UNIQUE_CLIENT_TAG created on other
// clients to override this entry.
// - Let us delete this entry permanently through
// DirectoryBackingStore::DropDeletedEntries() when we next restart sync.
// This will save memory and avoid crbug.com/125381.
if (!GetId().ServerKnows()) {
PutIsUnsynced(false);
}
}
{
ScopedKernelLock lock(dir());
// Some indices don't include deleted items and must be updated
// upon a value change.
ScopedParentChildIndexUpdater updater(lock, kernel_,
&dir()->kernel_->parent_child_index);
kernel_->put(IS_DEL, value);
kernel_->mark_dirty(&dir()->kernel_->dirty_metahandles);
}
}
void MutableEntry::PutNonUniqueName(const std::string& value) {
DCHECK(kernel_);
write_transaction()->TrackChangesTo(kernel_);
if (kernel_->ref(NON_UNIQUE_NAME) != value) {
kernel_->put(NON_UNIQUE_NAME, value);
kernel_->mark_dirty(&dir()->kernel_->dirty_metahandles);
}
}
void MutableEntry::PutSpecifics(const sync_pb::EntitySpecifics& value) {
DCHECK(kernel_);
CHECK(!value.password().has_client_only_encrypted_data());
write_transaction()->TrackChangesTo(kernel_);
// TODO(ncarter): This is unfortunately heavyweight. Can we do
// better?
if (kernel_->ref(SPECIFICS).SerializeAsString() !=
value.SerializeAsString()) {
kernel_->put(SPECIFICS, value);
kernel_->mark_dirty(&dir()->kernel_->dirty_metahandles);
}
}
void MutableEntry::PutUniquePosition(const UniquePosition& value) {
DCHECK(kernel_);
write_transaction()->TrackChangesTo(kernel_);
if(!kernel_->ref(UNIQUE_POSITION).Equals(value)) {
// We should never overwrite a valid position with an invalid one.
DCHECK(value.IsValid());
ScopedKernelLock lock(dir());
ScopedParentChildIndexUpdater updater(
lock, kernel_, &dir()->kernel_->parent_child_index);
kernel_->put(UNIQUE_POSITION, value);
kernel_->mark_dirty(&dir()->kernel_->dirty_metahandles);
}
}
bool MutableEntry::PutPredecessor(const Id& predecessor_id) {
MutableEntry predecessor(write_transaction(), GET_BY_ID, predecessor_id);
if (!predecessor.good())
return false;
dir()->PutPredecessor(kernel_, predecessor.kernel_);
return true;
}
// This function sets only the flags needed to get this entry to sync.
bool MarkForSyncing(MutableEntry* e) {
DCHECK_NE(static_cast<MutableEntry*>(NULL), e);
DCHECK(!e->IsRoot()) << "We shouldn't mark a permanent object for syncing.";
if (!(e->PutIsUnsynced(true)))
return false;
e->PutSyncing(false);
return true;
}
} // namespace syncable
} // namespace syncer
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