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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchlib/common/serialnum.h>
#include <vespa/vespalib/stllike/string.h>
#include <vespa/vespalib/util/varholder.h>
#include <memory>
#include <optional>
namespace document { class DocumentTypeRepo; }
namespace search::index { class Schema; }
namespace proton {
class AttributeCollectionSpecFactory;
class DocumentDBConfig;
class DocumentSubDBReconfig;
class FastAccessFeedView;
class IAttributeWriter;
struct IReprocessingInitializer;
class ReconfigParams;
/**
* Class used to reconfig the feed view used in a fast-access sub database
* when the set of fast-access attributes change.
*/
class FastAccessDocSubDBConfigurer
{
public:
using FeedViewVarHolder = vespalib::VarHolder<std::shared_ptr<FastAccessFeedView>>;
private:
FeedViewVarHolder &_feedView;
vespalib::string _subDbName;
void reconfigureFeedView(FastAccessFeedView & curr,
std::shared_ptr<search::index::Schema> schema,
std::shared_ptr<const document::DocumentTypeRepo> repo,
std::shared_ptr<IAttributeWriter> attrWriter);
public:
FastAccessDocSubDBConfigurer(FeedViewVarHolder &feedView,
const vespalib::string &subDbName);
~FastAccessDocSubDBConfigurer();
std::unique_ptr<DocumentSubDBReconfig>
prepare_reconfig(const DocumentDBConfig& new_config_snapshot,
const AttributeCollectionSpecFactory& attr_spec_factory,
const ReconfigParams& reconfig_params,
uint32_t docid_limit,
std::optional<search::SerialNum> serial_num);
std::unique_ptr<IReprocessingInitializer>
reconfigure(const DocumentDBConfig &newConfig,
const DocumentDBConfig &oldConfig,
const DocumentSubDBReconfig& prepared_reconfig,
search::SerialNum serial_num);
};
} // namespace proton
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