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1d42c4f6de
Per XLS-0095, we are taking steps to rename ripple(d) to xrpl(d). This change specifically removes all copyright notices referencing Ripple, XRPLF, and certain affiliated contributors upon mutual agreement, so the notice in the LICENSE.md file applies throughout. Copyright notices referencing external contributions remain as-is. Duplicate verbiage is also removed.
45 lines
1.2 KiB
C++
45 lines
1.2 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 ripple {
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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(
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Scheduler& scheduler,
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int readThreads,
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Section const& config,
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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(
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std::string const& writableName,
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std::string const& archiveName)> const& f) = 0;
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};
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} // namespace NodeStore
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} // namespace ripple
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#endif
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