September 2024
Intermediate to advanced
488 pages
15h 59m
Spanish
Content preview from Kafka: La Guía Definitiva, 2ª Edición
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Capítulo 4. Consumidores de Kafka: Lectura de datos de Kafka
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Las aplicaciones que necesitan leer datos de Kafka utilizan un KafkaConsumer para suscribirse a temas de Kafka y recibir mensajes de estos temas. Leer datos de Kafka es un poco diferente a leer datos de otros sistemas de mensajería, y hay algunos conceptos e ideas únicos implicados. Puede ser difícil entender cómo utilizar la API del Consumidor sin entender primero estos conceptos. Empezaremos explicando algunos de los conceptos importantes, y luego veremos algunos ejemplos que muestran las diferentes formas en que se pueden utilizar las API de Consumidor para implementar aplicaciones con requisitos diversos.
Conceptos de consumo Kafka
Para entender cómo leer datos de Kafka, primero tienes que entender sus consumidores y grupos de consumidores. Las siguientes secciones cubren esos conceptos.
Consumidores y Grupos de Consumidores
Supón que tienes una aplicación que necesita leer mensajes de un tema Kafka, ejecutar algunas validaciones contra ellos, y escribir los resultados en otro almacén de datos. En este caso, tu aplicación creará un objeto consumidor, se suscribirá al tema apropiado y empezará a recibir mensajes, validarlos y escribir los resultados. Esto puede funcionar bien durante un tiempo, pero ¿qué ocurre si el ritmo al que los productores escriben mensajes en el tema supera el ritmo al que ...
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