January 2018
Intermediate to advanced
336 pages
7h 56m
English
Content preview from Microservices with Clojure
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Integrating the Alert Service with Kafka
The Alert microservice of the Helping Hands application receives the alert messages over the Kafka topic that is used to send the alert in an email. To send an email as soon as the message is received, it can be integrated within the loop that looks for a message published by the producer, as shown here:
(defn consume-records "Consume the records using given consumer" [consumer result] (while true (doseq [record (.poll consumer 1000)] (try (let [rmsg (jp/parse-string (.value record)) msg (into {} (filter (comp some? val) {:from (conf/get-config [:alert :from]) :to (get rmsg "to" (conf/get-config [:alert :to])) :cc (rmsg "cc") :subject (rmsg "subject") :body (rmsg "body")})) result (postal/send-message ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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