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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "i_gid_to_lid_change_listener.h"
#include <vespa/searchlib/common/serialnum.h>
#include <set>
#include <vector>
namespace document { class GlobalId; }
namespace proton {
class IPendingGidToLidChanges;
/*
* Interface class for registering listeners that get notification when
* gid to lid mapping changes.
*/
class IGidToLidChangeHandler
{
public:
using IDestructorCallbackSP = IGidToLidChangeListener::IDestructorCallbackSP;
using SerialNum = search::SerialNum;
using GlobalId = document::GlobalId;
virtual ~IGidToLidChangeHandler();
/*
* Add listener unless a listener with matching docTypeName and
* name already exists.
*/
virtual void addListener(std::unique_ptr<IGidToLidChangeListener> listener) = 0;
/**
* Remove listeners with matching docTypeName unless name is present in
* keepNames.
*/
virtual void removeListeners(const vespalib::string &docTypeName,
const std::set<vespalib::string> &keepNames) = 0;
/**
* Notify pending gid to lid mapping change. Passed on to listeners later
* when force commit has made changes visible.
*/
virtual void notifyPut(IDestructorCallbackSP context, GlobalId gid, uint32_t lid, SerialNum serial_num) = 0;
/**
* Notify removal of gid. Passed on to listeners at once.
*/
void notifyRemove(IDestructorCallbackSP context, GlobalId gid, SerialNum serialNum);
virtual void notifyRemoves(IDestructorCallbackSP context, const std::vector<GlobalId> & gids, SerialNum serialNum) = 0;
virtual std::unique_ptr<IPendingGidToLidChanges> grab_pending_changes() = 0;
};
} // namespace proton
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