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#ifndef ADHOCUTIL_CACHE_IMPL_H
#define ADHOCUTIL_CACHE_IMPL_H
#include "cache.h"
#include "lockHelpers.h"
#include <boost/lambda/lambda.hpp>
#include <mutex>
#include <shared_mutex>
namespace AdHoc {
/// @cond
template<typename T, typename K> Cacheable<T, K>::Cacheable(K k, time_t vu) : key(std::move(k)), validUntil(vu) { }
template<typename T, typename K>
ObjectCacheable<T, K>::ObjectCacheable(const T & t, const K & k, time_t vu) :
Cacheable<T, K>(k, vu), value(std::make_shared<T>(t))
{
}
template<typename T, typename K>
ObjectCacheable<T, K>::ObjectCacheable(typename Cacheable<T, K>::Value t, const K & k, time_t vu) :
Cacheable<T, K>(k, vu), value(std::move(t))
{
}
template<typename T, typename K>
typename Cacheable<T, K>::Value
ObjectCacheable<T, K>::item() const
{
return value;
}
template<typename T, typename K>
CallCacheable<T, K>::CallCacheable(const Factory & t, const K & k, time_t vu) : Cacheable<T, K>(k, vu), value(t)
{
}
template<typename T, typename K>
typename Cacheable<T, K>::Value
CallCacheable<T, K>::item() const
{
Lock(lock);
if (auto t = std::get_if<0>(&value)) {
return *t;
}
const Factory & f = std::get<Factory>(value);
value = std::make_shared<T>(f());
return std::get<0>(value);
}
template<typename T, typename K>
PointerCallCacheable<T, K>::PointerCallCacheable(const Factory & t, const K & k, time_t vu) :
Cacheable<T, K>(k, vu), value(t)
{
}
template<typename T, typename K>
typename Cacheable<T, K>::Value
PointerCallCacheable<T, K>::item() const
{
Lock(lock);
if (auto t = std::get_if<0>(&value)) {
return *t;
}
const Factory & f = std::get<Factory>(value);
value = f();
return std::get<0>(value);
}
template<typename T, typename K> Cache<T, K>::Cache() : lastPruneTime(time(nullptr)) { }
template<typename T, typename K>
void
Cache<T, K>::add(const K & k, const T & t, time_t validUntil)
{
Lock(lock);
cached.insert(std::make_shared<ObjectCacheable<T, K>>(t, k, validUntil));
}
template<typename T, typename K>
void
Cache<T, K>::addPointer(const K & k, Value & t, time_t validUntil)
{
Lock(lock);
cached.insert(std::make_shared<ObjectCacheable<T, K>>(t, k, validUntil));
}
template<typename T, typename K>
void
Cache<T, K>::addFactory(const K & k, const Factory & tf, time_t validUntil)
{
Lock(lock);
cached.insert(std::make_shared<CallCacheable<T, K>>(tf, k, validUntil));
}
template<typename T, typename K>
void
Cache<T, K>::addPointerFactory(const K & k, const PointerFactory & tf, time_t validUntil)
{
Lock(lock);
cached.insert(std::make_shared<PointerCallCacheable<T, K>>(tf, k, validUntil));
}
template<typename T, typename K>
typename Cache<T, K>::Element
Cache<T, K>::getItem(const K & k) const
{
{
SharedLock(lock);
auto & collection = cached.template get<byKey>();
auto i = collection.find(k);
if (i == collection.end()) {
return Element();
}
if ((*i)->validUntil > time(nullptr)) {
return (*i);
}
}
prune();
return Element();
}
template<typename T, typename K>
typename Cache<T, K>::Value
Cache<T, K>::get(const K & k) const
{
auto i = getItem(k);
if (i) {
return i->item();
}
return nullptr;
}
template<typename T, typename K>
size_t
Cache<T, K>::size() const
{
return cached.size();
}
template<typename T, typename K>
void
Cache<T, K>::remove(const K & k)
{
Lock(lock);
cached.template get<byKey>().erase(k);
}
template<typename T, typename K>
void
Cache<T, K>::clear()
{
Lock(lock);
cached.clear();
}
template<typename T, typename K>
void
Cache<T, K>::prune() const
{
auto now = time(nullptr);
if (lastPruneTime < now) {
Lock(lock);
auto & collection = cached.template get<byValidity>();
auto range = collection.range(boost::multi_index::unbounded, boost::lambda::_1 < now);
collection.erase(range.first, range.second);
lastPruneTime = now;
}
}
/// @endcond
}
#endif
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