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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SYNC_SERVICE_GET_ALL_NODES_REQUEST_BARRIER_H_
#define COMPONENTS_SYNC_SERVICE_GET_ALL_NODES_REQUEST_BARRIER_H_
#include "base/functional/callback.h"
#include "base/memory/ref_counted.h"
#include "base/sequence_checker.h"
#include "base/values.h"
#include "components/sync/base/data_type.h"
namespace syncer {
// A helper class for DataTypeManagerImpl's implementation of
// GetAllNodesForDebugging. It accumulates the responses from each type's
// DataTypeController, and runs the supplied callback once they're all done.
class GetAllNodesRequestBarrier
: public base::RefCountedThreadSafe<GetAllNodesRequestBarrier> {
public:
// Once `OnReceivedNodesForType` has been called for each type in
// `requested_types`, the `callback` will be run. `requested_types` must not
// be empty.
GetAllNodesRequestBarrier(
DataTypeSet requested_types,
base::OnceCallback<void(base::Value::List)> callback);
GetAllNodesRequestBarrier(const GetAllNodesRequestBarrier&) = delete;
GetAllNodesRequestBarrier& operator=(const GetAllNodesRequestBarrier&) =
delete;
void OnReceivedNodesForType(const DataType type, base::Value::List node_list);
private:
friend class base::RefCountedThreadSafe<GetAllNodesRequestBarrier>;
virtual ~GetAllNodesRequestBarrier();
DataTypeSet awaiting_types_;
base::Value::List result_accumulator_;
base::OnceCallback<void(base::Value::List)> callback_;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace syncer
#endif // COMPONENTS_SYNC_SERVICE_GET_ALL_NODES_REQUEST_BARRIER_H_
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