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Update instrumentation guides w/optional block

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Ali Ibrahim 2019-03-22 13:20:32 -04:00
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11
guides/source/active_support_instrumentation.md
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@ -692,5 +692,16 @@ ActiveSupport::Notifications.subscribe "my.custom.event" do |name, started, fini
end
```
You also have the option to call instrument without passing a block. This lets you leverage the
instrumentation infrastructure for other messaging uses.
```ruby
ActiveSupport::Notifications.instrument "my.custom.event", this: :data
ActiveSupport::Notifications.subscribe "my.custom.event" do |name, started, finished, unique_id, data|
puts data.inspect # {:this=>:data}
end
```
You should follow Rails conventions when defining your own events. The format is: `event.library`.
If your application is sending Tweets, you should create an event named `tweet.twitter`.