Don't send healthcheck events to AppSignal to save storage

Author: northeastprince

config/initializers/health_check_event_filter.rb

@@ -0,0 +1,32 @@
+Rails.application.config.to_prepare do
+  original_subscriber_entry = if defined?(Appsignal::Integrations::ActiveSupportEventReporter::Subscriber)
+    Rails.event.instance_variable_get(:@subscribers).find do |entry|
+      entry[:subscriber].is_a? Appsignal::Integrations::ActiveSupportEventReporter::Subscriber
+    end
+  end
+
+  next unless original_subscriber_entry
+
+  subscribers.delete original_subscriber_entry
+
+  filtered_subscriber = Class.new do
+    def initialize(original_subscriber)
+      @original_subscriber = original_subscriber
+    end
+
+    def emit(event)
+      @original_subscriber.emit(event) unless healthcheck?(event)
+    end
+
+    private
+
+    def healthcheck?(event)
+      event.dig(:payload, :controller) == "Rails::HealthController" && event.dig(:payload, :action) == "show"
+    end
+  end
+
+  Rails.event.subscribe(
+    filtered_subscriber.new(original_subscriber_entry[:subscriber]),
+    &original_subscriber_entry[:filter]
+  )
+end