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5f638f5553
This change updates the ColumnLimit from 80 to 120, and applies clang-format to reformat the code.
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
#ifndef XRPL_NODESTORE_DATABASEROTATING_H_INCLUDED
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#define XRPL_NODESTORE_DATABASEROTATING_H_INCLUDED
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#include <xrpl/nodestore/Database.h>
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namespace xrpl {
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namespace NodeStore {
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/* This class has two key-value store Backend objects for persisting SHAMap
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* records. This facilitates online deletion of data. New backends are
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* rotated in. Old ones are rotated out and deleted.
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*/
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class DatabaseRotating : public Database
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{
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public:
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DatabaseRotating(Scheduler& scheduler, int readThreads, Section const& config, beast::Journal journal)
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: Database(scheduler, readThreads, config, journal)
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{
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}
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/** Rotates the backends.
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@param newBackend New writable backend
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@param f A function executed after the rotation outside of lock. The
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values passed to f will be the new backend database names _after_
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rotation.
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*/
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virtual void
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rotate(
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std::unique_ptr<NodeStore::Backend>&& newBackend,
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std::function<void(std::string const& writableName, std::string const& archiveName)> const& f) = 0;
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};
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} // namespace NodeStore
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} // namespace xrpl
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#endif
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