jameslafa · December 2, 2016 09:40 · Dec 2, 2016
diff --git a/README.md b/README.md
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+In case Redis is down, the job will be perform synchronously instead of crashing.
+
+On your job, use perform_later_with_failover instead of perform_later.
+
+Take this into account:
+
+ 1. You should find a way to monitor that Redis/Sidekiq is down and be alerted. You will be in a degraded mode if the task are executed synchronously and you should be aware of this as soon as possible
+ 2. You should use perform_later_with_failover only if you expect the execution time of the task to be fairly short (send email, slack notification, etc.) If you know the task requires time to be perform, it's not a good solution because your user's browser will be blocked.
diff --git a/active_job_with_failover.rb b/active_job_with_failover.rb
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+# lib/active_job_with_failover.rb
+
+class ActiveJob::Base
+  # In case Redis is down, it will perform the job synchronously
+  # Instead of crashing
+  def self.perform_later_with_failover(*args)    
+    redis_available = true
+    Sidekiq.redis do |connection|
+      begin
+        connection.info
+      rescue Redis::CannotConnectError
+        redis_available = false
+      end
+    end
+    if redis_available || Rails.application.config.active_job.queue_adapter == :test
+      # process the job asynchronously
+      perform_later(*args)
+    else
+      # otherwise, instantiate and perform synchronously
+      perform_now(*args)
+    end
+  end
+end
diff --git a/environment.rb b/environment.rb
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+# Add the following line in config/environment.rb
+require 'active_job_with_failover'
Original file line number	Diff line number	Diff line change
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		# Add the following line in config/environment.rb
		require 'active_job_with_failover'
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