topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

talk show tell print

lib-of-vs-libs-Poco-include-Poco-AccessExpireStrategy.h / h



  //
  // AccessExpireStrategy.h
  //
  // Id: //poco/1.3/Foundation/include/Poco/AccessExpireStrategy.h#1 
  //
  // Library: Foundation
  // Package: Cache
  // Module:  AccessExpireStrategy
  //
  // Definition of the AccessExpireStrategy class.
  //
  // Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
  // and Contributors.
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  // 
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  // DEALINGS IN THE SOFTWARE.
  //
  
  ifndef  Foundation_AccessExpireStrategy_INCLUDED
  define  Foundation_AccessExpireStrategy_INCLUDED
  
  include "Poco/KeyValueArgs.h"
  include "Poco/ValidArgs.h"
  include "Poco/ExpireStrategy.h"
  include "Poco/Bugcheck.h"
  include "Poco/Timestamp.h"
  include "Poco/EventArgs.h"
  include <set>
  include <map>
  
  namespace Poco {
  
  template < 
  	class TKey,
  	class TValue
  >
  class AccessExpireStrategy: public ExpireStrategy<TKey, TValue>
An AccessExpireStrategy implements time and access based expiration of cache entries { public: AccessExpireStrategy(Timestamp::TimeDiff expireTimeInMilliSec): ExpireStrategy<TKey, TValue>(expireTimeInMilliSec) Create an expire strategy. Note that the smallest allowed caching time is 25ms. Anything lower than that is not useful with current operating systems. { } 

          ~AccessExpireStrategy()
          {
          }
  
          void onGet(const void*, const TKey& key)
          {
                  // get triggers an update to the expiration time
                  typename ExpireStrategy<TKey, TValue>::Iterator it = this->_keys.find(key);
                  if (it != this->_keys.end())
                  {
                          this->_keyIndex.erase(it->second);
                          Timestamp now;
                          typename ExpireStrategy<TKey, TValue>::IndexIterator itIdx =
                                  this->_keyIndex.insert(typename ExpireStrategy<TKey, TValue>::TimeIndex::value_type(now, key));
                          it->second = itIdx;
                  }
          }
  };
  
  } // namespace Poco
  
  endif // Foundation_AccessExpireStrategy_INCLUDED
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

You may not copy or print any of this material without explicit permission of the author or the publisher. In case of other copyright issues, contact the author.