September 2024
Intermediate to advanced
278 pages
7h 40m
Spanish
Content preview from Programar AWS Lambda
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Capítulo 4. Funcionamiento de las funciones Lambda de AWS
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Este capítulo presentará un método más avanzado de crear y empaquetar funciones AWS Lambda basadas en Java. También entraremos en más detalles sobre la versión sin servidor de la herramienta de infraestructura como código de AWS, SAM, que utilizaste por primera vez en el capítulo 2. Por último, repasaremos cómo las funciones Lambda y las aplicaciones sin servidor se ven afectadas por el modelo de seguridad de AWS y cómo utilizar SAM para aplicar automáticamente un modelo de seguridad de privilegios mínimos para nuestra aplicación sin servidor.
Antes de continuar, te recomendamos que, si aún no lo has hecho, descargues los ejemplos de código de este libro.
Construir y empaquetar
La plataforma Lambda espera que todo el código proporcionado por el usuario tenga forma de archivo ZIP. Dependiendo del tiempo de ejecución que utilices y de tu lógica empresarial real, ese archivo ZIP puede consistir en código fuente, o código y bibliotecas, o, en el caso de Java, código de bytes compilado (archivos de clase) y bibliotecas.
En el ecosistema Java, a menudo empaquetamos nuestro código en archivos JAR (Java ARchive), para ejecutarlos mediante el comando java -jar, o para que otras aplicaciones los utilicen como bibliotecas. Resulta que un archivo JAR es simplemente un archivo ZIP con algunos metadatos adicionales. La ...
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