October 2024
Intermediate to advanced
482 pages
15h 41m
Spanish
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Capítulo 4. Servidores genéricos
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Después de haber descompuesto el asignador de radiofrecuencias en módulos genéricos y específicos y de haber investigado algunos de los casos de esquina que pueden darse al tratar con la concurrencia, te habrás dado cuenta de que no es necesario pasar por este proceso cada vez que tengas que implementar un comportamiento cliente-servidor. En este capítulo, presentamos el comportamiento gen_server OTP, un módulo de la biblioteca que contiene toda la funcionalidad genérica cliente-servidor, a la vez que maneja un gran número de casos de esquina. Los servidores genéricos son el patrón de comportamiento más utilizado, sentando las bases para otros comportamientos, todos los cuales pueden ser (y en los primeros días de OTP lo fueron) implementados utilizando este módulo.
Servidores genéricos
El módulo gen_server implementa el comportamiento cliente-servidor que extrajimos en el capítulo anterior. Forma parte de la aplicación de la biblioteca estándar y está disponible como parte de la distribución Erlang/OTP. Contiene el código genérico que interactúa con el módulo de devolución de llamada a través de un conjunto de funciones de devolución de llamada. El módulo de devolución de llamada, que en nuestro ejemplo contiene el código específico del servidor de frecuencias, es implementado por el programador. El módulo de devolución de llamada ...
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