40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
#pragma once
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#ifndef MESSMER_BLOCKSTORE_INTERFACE_BLOCKSTORE_H_
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#define MESSMER_BLOCKSTORE_INTERFACE_BLOCKSTORE_H_
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#include "Block.h"
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#include <string>
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#include <boost/optional.hpp>
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#include <cpp-utils/pointer/unique_ref.h>
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#include <cpp-utils/data/Data.h>
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namespace blockstore {
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class BlockStore {
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public:
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virtual ~BlockStore() {}
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virtual Key createKey() = 0;
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//Returns boost::none if key already exists
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virtual boost::optional<cpputils::unique_ref<Block>> tryCreate(const Key &key, cpputils::Data data) = 0;
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//TODO Use boost::optional (if key doesn't exist)
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// Return nullptr if block with this key doesn't exists
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virtual boost::optional<cpputils::unique_ref<Block>> load(const Key &key) = 0;
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virtual void remove(cpputils::unique_ref<Block> block) = 0;
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virtual uint64_t numBlocks() const = 0;
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cpputils::unique_ref<Block> create(const cpputils::Data &data) {
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while(true) {
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//TODO Copy (data.copy()) necessary?
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auto block = tryCreate(createKey(), data.copy());
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if (block != boost::none) {
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return std::move(*block);
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}
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}
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}
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};
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}
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#endif
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