October 2024
Intermediate to advanced
638 pages
15h 47m
Spanish
Content preview from Libro de cocina de Java, 4ª edición
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Capítulo 12. Clientes de red
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12.0 Introducción
Java puede utilizarse para escribir muchos tipos de programas en red. En el código tradicional basado en sockets, el programador es responsable de estructurar la interacción entre el cliente y el servidor; el código del socket TCP simplemente se asegura de que los datos que envíes lleguen al otro extremo. En los tipos de nivel superior, como HTTP, RMI, CORBA y EJB, el software asume más control. Los sockets se utilizan a menudo para conectarse a servidores heredados; si estuvieras escribiendo una nueva aplicación desde cero, sería mejor que utilizaras un servicio de nivel superior.
Puede ser útil comparar los enchufes con el sistema telefónico. Los teléfonos se utilizaban originalmente para el tráfico de voz analógico, que es bastante desestructurado. Luego empezaron a utilizarse para algunas aplicaciones estratificadas; la primera ampliamente popular fue la transmisión de facsímiles, o fax. ¿Dónde estaría el fax sin la amplia disponibilidad de la telefonía vocal? La segunda aplicación por capas muy popular históricamente fue la conexión telefónica TCP/IP. Ésta coexistió con la web para popularizarse como servicio de gran consumo. ¿Dónde estaría el IP dial-up sin la amplia implementación de las líneas de voz? ¿Y dónde estaría Internet sin el IP dial-up? El fax y el IP dial-up han desaparecido en su mayor parte, pero ...
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