Pull-Model

Pull-Model

Das Pull-Model ist ein Pattern zur Datenübertragung, bei dem der Datenempfänger sich die nächsten Informationen selbst holt, wenn er sie benötigt bzw. die nächsten Daten verarbeitet werden können. Der Empfänger meldet sich beim Datenlieferanten an. Der Lieferant benachrichtigt den Empfänger nur über das Vorliegen neuer Werte.

Vorteile

  • Anders als beim Polling holt sich der Empfänger die Daten, nur falls auch Änderungen vorliegen.
  • Der Empfänger kann, anders als beim Push-Model, in einer Überlastsituation die Datenübertragung verlangsamen.

Die Nachteile des Pull-Model decken sich weitgehend mit den Nachteilen des Polling:

  • Falls die Datenänderungen im Sender kurzzeitig häufiger auftreten, als der Empfänger diese verarbeiten kann, gehen Zwischenwerte verloren.

Wikimedia Foundation.

Игры ⚽ Поможем написать курсовую

Schlagen Sie auch in anderen Wörterbüchern nach:

  • Model 39 grenade — The Model 39 Eihandgranate (or Eierhandgranate, egg hand grenade ) was a German hand grenade introduced in 1939 and produced until the end of World War II. The Eihandgranate used the same fuse assembly (the BZE 39) as the Model 43… …   Wikipedia

  • Model 24 grenade — German stick grenade Model 24 The Model 24 Stielhandgranate was the standard hand grenade of the German Army from the end of World War I until the end of World War II. The very distinctive appearance led to its being called a stick grenade , or a …   Wikipedia

  • Model rocket — A typical model rocket during launch A model rocket is a small rocket that is commonly advertised as being able to be launched by anybody, to, in general, low altitudes (usually to around 100–500 m (300–1500 ft) for a 30 g (1 oz.) model) and …   Wikipedia

  • Pull à col roulé — Col roulé Sous pull blanc à col roulé porté sous un chemisier Un col roulé est un vêtement unisexe se caractérisant par son haut col ajusté qui se rabat et couvre le cou. Il s agit d un « pull over en maille fine se caractérisant par son col …   Wikipédia en Français

  • Model aircraft — A die cast Boeing 747 400 model. Model aircraft are flying or non flying models of existing or imaginary aircraft using a variety of materials including plastic, diecast metal, polystyrene, balsa wood, foam and fibreglass. Flying designs range… …   Wikipedia

  • Model car — For the term referring to delineation of (non model) car ranges, see car model. This Norev model car is a good miniature representation of a real Renault 4CV and would have been sold as a children s toy. A model car or toy car is a miniature… …   Wikipedia

  • Model–view–controller — A general representation of the MVC design pattern. Model view controller concept. The solid line represents a direct as …   Wikipedia

  • Model railway scales — This page lists the most important model railway scale standards in the world. Most standards are regional, but some have followers in other parts of the world outside their native region, most notably NEM and NMRA. It should be noted that while… …   Wikipedia

  • Model 43 grenade — The Model 43 Stielhandgranate was introduced by the German Army mid way through World War II to replace the earlier Model 24 (the archetypal stick grenade). This development was intended to simplify production and to enhance its versatility,… …   Wikipedia

  • Model 49 mine — The Model 49 is a large cylindrical Swiss anti personnel stake mine. The mine is no longer in service with Swiss forces and all operational stocks of the mine have been destroyed. The mine is normally stake mounted, and uses the ZDZ 39 fuze,… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”