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mapper.clj
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mapper.clj
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(ns ziggurat.mapper
(:require [clojure.string :as str]
[sentry-clj.async :as sentry]
[ziggurat.config :refer [ziggurat-config]]
[ziggurat.messaging.producer :as producer]
[ziggurat.metrics :as metrics]
[ziggurat.new-relic :as nr]
[ziggurat.sentry :refer [sentry-reporter]]
[ziggurat.util.error :refer [report-error]]
[cambium.core :as clog])
(:import (java.time Instant)))
(defn- send-msg-to-channel [channels message-payload return-code]
(when-not (contains? (set channels) return-code)
(throw (ex-info "Invalid mapper return code" {:code return-code})))
(producer/publish-to-channel-instant-queue return-code message-payload))
(defn- create-user-payload
[message-payload]
(-> message-payload
(dissoc :headers)
(dissoc :retry-count)
(dissoc :topic-entity)))
(defn mapper-func [user-handler-fn channels]
(fn [{:keys [topic-entity] :as message-payload}]
(let [service-name (:app-name (ziggurat-config))
topic-entity-name (name topic-entity)
new-relic-transaction-name (str topic-entity-name ".handler-fn")
message-processing-namespace "message-processing"
base-metric-namespaces [service-name topic-entity-name]
message-processing-namespaces (conj base-metric-namespaces message-processing-namespace)
additional-tags {:topic_name topic-entity-name}
success-metric "success"
retry-metric "retry"
skip-metric "skip"
failure-metric "failure"
dead-letter-metric "dead-letter"
multi-message-processing-namespaces [message-processing-namespaces [message-processing-namespace]]
user-payload (create-user-payload message-payload)]
(clog/with-logging-context {:consumer-group topic-entity-name}
(nr/with-tracing "job" new-relic-transaction-name
(try
(let [start-time (.toEpochMilli (Instant/now))
return-code (user-handler-fn user-payload)
end-time (.toEpochMilli (Instant/now))
time-val (- end-time start-time)
execution-time-namespace "handler-fn-execution-time"
multi-execution-time-namespaces [(conj base-metric-namespaces execution-time-namespace)
[execution-time-namespace]]]
(metrics/multi-ns-report-histogram multi-execution-time-namespaces time-val additional-tags)
(case return-code
:success (metrics/multi-ns-increment-count multi-message-processing-namespaces success-metric additional-tags)
:retry (do (metrics/multi-ns-increment-count multi-message-processing-namespaces retry-metric additional-tags)
(producer/retry message-payload))
:dead-letter (do (metrics/multi-ns-increment-count multi-message-processing-namespaces dead-letter-metric additional-tags)
(producer/publish-to-dead-queue message-payload))
:skip (metrics/multi-ns-increment-count multi-message-processing-namespaces skip-metric additional-tags)
:block 'TODO
(do
(send-msg-to-channel channels message-payload return-code)
(metrics/multi-ns-increment-count multi-message-processing-namespaces success-metric additional-tags))))
(catch Throwable e
(producer/retry message-payload)
(report-error e (str "Actor execution failed for " topic-entity-name))
(metrics/multi-ns-increment-count multi-message-processing-namespaces failure-metric additional-tags))))))))
(defn channel-mapper-func [user-handler-fn channel]
(fn [{:keys [topic-entity] :as message-payload}]
(let [service-name (:app-name (ziggurat-config))
topic-entity-name (name topic-entity)
channel-name (name channel)
message-processing-namespace "message-processing"
base-metric-namespaces [service-name topic-entity-name channel-name]
message-processing-namespaces (conj base-metric-namespaces message-processing-namespace)
additional-tags {:topic_name topic-entity-name :channel_name channel-name}
metric-namespace (str/join "." message-processing-namespaces)
success-metric "success"
retry-metric "retry"
skip-metric "skip"
failure-metric "failure"
dead-letter-metric "dead-letter"
multi-message-processing-namespaces [message-processing-namespaces [message-processing-namespace]]
user-payload (create-user-payload message-payload)]
(clog/with-logging-context {:consumer-group topic-entity-name :channel channel-name}
(nr/with-tracing "job" metric-namespace
(try
(let [start-time (.toEpochMilli (Instant/now))
return-code (user-handler-fn user-payload)
end-time (.toEpochMilli (Instant/now))
time-val (- end-time start-time)
execution-time-namespace "execution-time"
multi-execution-time-namespace [(conj base-metric-namespaces execution-time-namespace)
[execution-time-namespace]]]
(metrics/multi-ns-report-histogram multi-execution-time-namespace time-val additional-tags)
(case return-code
:success (metrics/multi-ns-increment-count multi-message-processing-namespaces success-metric additional-tags)
:retry (do (metrics/multi-ns-increment-count multi-message-processing-namespaces retry-metric additional-tags)
(producer/retry-for-channel message-payload channel))
:dead-letter (do (metrics/multi-ns-increment-count multi-message-processing-namespaces dead-letter-metric additional-tags)
(producer/publish-to-channel-dead-queue channel message-payload))
:skip (metrics/multi-ns-increment-count multi-message-processing-namespaces skip-metric additional-tags)
:block 'TODO
(throw (ex-info "Invalid mapper return code" {:code return-code}))))
(catch Throwable e
(producer/retry-for-channel message-payload channel)
(report-error e (str "Channel execution failed for " topic-entity-name " and for channel " channel-name))
(metrics/multi-ns-increment-count multi-message-processing-namespaces failure-metric additional-tags))))))))
(defrecord MessagePayload [message topic-entity])