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// Copyright (c) 2011 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.
#ifndef CHROME_BROWSER_SYNC_ENGINE_GET_COMMIT_IDS_COMMAND_H_
#define CHROME_BROWSER_SYNC_ENGINE_GET_COMMIT_IDS_COMMAND_H_
#pragma once
#include <utility>
#include <vector>
#include "base/compiler_specific.h"
#include "chrome/browser/sync/engine/syncer_command.h"
#include "chrome/browser/sync/engine/syncer_util.h"
#include "chrome/browser/sync/sessions/ordered_commit_set.h"
#include "chrome/browser/sync/sessions/sync_session.h"
using std::pair;
using std::vector;
namespace browser_sync {
class GetCommitIdsCommand : public SyncerCommand {
friend class SyncerTest;
public:
explicit GetCommitIdsCommand(int commit_batch_size);
virtual ~GetCommitIdsCommand();
// SyncerCommand implementation.
virtual void ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
// Builds a vector of IDs that should be committed.
void BuildCommitIds(const vector<int64>& unsynced_handles,
syncable::WriteTransaction* write_transaction,
const ModelSafeRoutingInfo& routes,
syncable::ModelEnumSet throttled_types);
// TODO(chron): Remove writes from this iterator. As a warning, this
// iterator causes writes to entries and so isn't a pure iterator.
// It will do Put(IS_UNSYNCED). Refactor this out later.
class CommitMetahandleIterator {
public:
// TODO(chron): Cache ValidateCommitEntry responses across iterators to save
// UTF8 conversion and filename checking
CommitMetahandleIterator(const vector<int64>& unsynced_handles,
syncable::WriteTransaction* write_transaction,
sessions::OrderedCommitSet* commit_set)
: write_transaction_(write_transaction),
handle_iterator_(unsynced_handles.begin()),
unsynced_handles_end_(unsynced_handles.end()),
commit_set_(commit_set) {
// TODO(chron): Remove writes from this iterator.
DCHECK(write_transaction_);
if (Valid() && !ValidateMetahandleForCommit(*handle_iterator_))
Increment();
}
~CommitMetahandleIterator() {}
int64 Current() const {
DCHECK(Valid());
return *handle_iterator_;
}
bool Increment() {
if (!Valid())
return false;
for (++handle_iterator_;
handle_iterator_ != unsynced_handles_end_;
++handle_iterator_) {
if (ValidateMetahandleForCommit(*handle_iterator_))
return true;
}
return false;
}
bool Valid() const {
return !(handle_iterator_ == unsynced_handles_end_);
}
private:
bool ValidateMetahandleForCommit(int64 metahandle) {
if (commit_set_->HaveCommitItem(metahandle))
return false;
// We should really not WRITE in this iterator, but we can fix that
// later. We should move that somewhere else later.
syncable::MutableEntry entry(write_transaction_,
syncable::GET_BY_HANDLE, metahandle);
VerifyCommitResult verify_result =
SyncerUtil::ValidateCommitEntry(&entry);
if (verify_result == VERIFY_UNSYNCABLE) {
// Drop unsyncable entries.
entry.Put(syncable::IS_UNSYNCED, false);
}
return verify_result == VERIFY_OK;
}
syncable::WriteTransaction* const write_transaction_;
vector<int64>::const_iterator handle_iterator_;
vector<int64>::const_iterator unsynced_handles_end_;
sessions::OrderedCommitSet* commit_set_;
DISALLOW_COPY_AND_ASSIGN(CommitMetahandleIterator);
};
private:
// Removes all entries not ready for commit from |unsynced_handles|.
// An entry is considered unready for commit if:
// 1. It's in conflict or requires (re)encryption. Any datatype requiring
// encryption while the cryptographer is missing a passphrase is
// considered unready for commit.
// 2. Its type is currently throttled.
void FilterUnreadyEntries(
syncable::BaseTransaction* trans,
syncable::ModelEnumSet throttled_types,
syncable::Directory::UnsyncedMetaHandles* unsynced_handles);
void AddUncommittedParentsAndTheirPredecessors(
syncable::BaseTransaction* trans,
syncable::Id parent_id,
const ModelSafeRoutingInfo& routes,
syncable::ModelEnumSet throttled_types);
// OrderedCommitSet helpers for adding predecessors in order.
// TODO(ncarter): Refactor these so that the |result| parameter goes away,
// and AddItem doesn't need to consider two OrderedCommitSets.
bool AddItem(syncable::Entry* item,
syncable::ModelEnumSet throttled_types,
sessions::OrderedCommitSet* result);
bool AddItemThenPredecessors(syncable::BaseTransaction* trans,
syncable::ModelEnumSet throttled_types,
syncable::Entry* item,
syncable::IndexedBitField inclusion_filter,
sessions::OrderedCommitSet* result);
void AddPredecessorsThenItem(syncable::BaseTransaction* trans,
syncable::ModelEnumSet throttled_types,
syncable::Entry* item,
syncable::IndexedBitField inclusion_filter,
const ModelSafeRoutingInfo& routes);
bool IsCommitBatchFull();
void AddCreatesAndMoves(const vector<int64>& unsynced_handles,
syncable::WriteTransaction* write_transaction,
const ModelSafeRoutingInfo& routes,
syncable::ModelEnumSet throttled_types);
void AddDeletes(const vector<int64>& unsynced_handles,
syncable::WriteTransaction* write_transaction);
scoped_ptr<sessions::OrderedCommitSet> ordered_commit_set_;
int requested_commit_batch_size_;
bool passphrase_missing_;
syncable::ModelEnumSet encrypted_types_;
DISALLOW_COPY_AND_ASSIGN(GetCommitIdsCommand);
};
} // namespace browser_sync
#endif // CHROME_BROWSER_SYNC_ENGINE_GET_COMMIT_IDS_COMMAND_H_
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