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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:nil -*-
// vim: ts=8 sw=2 smarttab
#pragma once
#include "include/buffer.h"
#include "node_types.h"
namespace crimson::os::seastore::onode {
/**
* DeltaRecorder
*
* An abstracted class to encapsulate different implementations to apply delta
* to a specific node layout.
*/
class DeltaRecorder {
public:
virtual ~DeltaRecorder() {
assert(is_empty());
}
bool is_empty() const {
return encoded.length() == 0;
}
ceph::bufferlist get_delta() {
assert(!is_empty());
return std::move(encoded);
}
virtual node_type_t node_type() const = 0;
virtual field_type_t field_type() const = 0;
virtual void apply_delta(ceph::bufferlist::const_iterator&,
NodeExtentMutable&) = 0;
protected:
DeltaRecorder() = default;
ceph::bufferlist encoded;
};
}
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