45 lines
942 B
C++
45 lines
942 B
C++
#pragma once
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#ifndef MESSMER_BLOCKSTORE_IMPLEMENTATIONS_CACHING_CACHEENTRY_H_
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#define MESSMER_BLOCKSTORE_IMPLEMENTATIONS_CACHING_CACHEENTRY_H_
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#include <ctime>
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#include <memory>
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#include <messmer/cpp-utils/macros.h>
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#include <boost/date_time/posix_time/posix_time_types.hpp>
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namespace blockstore {
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namespace caching {
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template<class Key, class Value>
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class CacheEntry {
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public:
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explicit CacheEntry(Value value): _lastAccess(currentTime()), _value(std::move(value)) {
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}
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CacheEntry(CacheEntry &&) = default;
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double ageSeconds() const {
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return ((double)(currentTime() - _lastAccess).total_nanoseconds()) / ((double)1000000000);
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}
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Value releaseValue() {
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return std::move(_value);
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}
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private:
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boost::posix_time::ptime _lastAccess;
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Value _value;
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static boost::posix_time::ptime currentTime() {
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return boost::posix_time::microsec_clock::local_time();
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}
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DISALLOW_COPY_AND_ASSIGN(CacheEntry);
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};
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}
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}
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#endif
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