initial commit

2025-09-01 20:47:58 +08:00
commit 12c51b5ddb
843 changed files with 475321 additions and 0 deletions
@@ -0,0 +1,71 @@
+//
+// UniqueAccessExpireLRUCache.h
+//
+// Library: Foundation
+// Package: Cache
+// Module:  UniqueAccessExpireLRUCache
+//
+// Definition of the UniqueAccessExpireLRUCache class.
+//
+// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_UniqueAccessExpireLRUCache_INCLUDED
+#define Foundation_UniqueAccessExpireLRUCache_INCLUDED
+
+
+#include "Poco/AbstractCache.h"
+#include "Poco/StrategyCollection.h"
+#include "Poco/UniqueAccessExpireStrategy.h"
+#include "Poco/LRUStrategy.h"
+
+
+namespace Poco {
+
+
+template < 
+	class TKey,
+	class TValue,
+	class TMutex = FastMutex, 
+	class TEventMutex = FastMutex
+>
+class UniqueAccessExpireLRUCache: public AbstractCache<TKey, TValue, StrategyCollection<TKey, TValue>, TMutex, TEventMutex>
+	/// A UniqueAccessExpireLRUCache combines LRU caching and time based per entry expire caching.
+	/// One can define for each cache entry a seperate timepoint
+	/// but also limit the size of the cache (per default: 1024).
+	/// Each TValue object must thus offer the following method:
+	///    
+	///    const Poco::Timespan& getTimeout() const;
+	///    
+	/// which returns the relative timespan for how long the entry should be valid without being accessed!
+	/// The absolute expire timepoint is calculated as now() + getTimeout().
+	/// Accessing an object will update this absolute expire timepoint.
+	/// You can use the Poco::AccessExpirationDecorator to add the getExpiration
+	/// method to values that do not have a getExpiration function.
+{
+public:
+	UniqueAccessExpireLRUCache(long cacheSize = 1024): 
+		AbstractCache<TKey, TValue, StrategyCollection<TKey, TValue>, TMutex, TEventMutex>(StrategyCollection<TKey, TValue>())
+	{
+		this->_strategy.pushBack(new LRUStrategy<TKey, TValue>(cacheSize));
+		this->_strategy.pushBack(new UniqueAccessExpireStrategy<TKey, TValue>());
+	}
+
+	~UniqueAccessExpireLRUCache()
+	{
+	}
+
+private:
+	UniqueAccessExpireLRUCache(const UniqueAccessExpireLRUCache& aCache);
+	UniqueAccessExpireLRUCache& operator = (const UniqueAccessExpireLRUCache& aCache);
+};
+
+
+} // namespace Poco
+
+
+#endif // Foundation_UniqueAccessExpireLRUCache_INCLUDED