Class: ActiveSupport::Notifications::NullInstrumenter

Relationships & Source Files
Namespace Children
Classes: `NullHandle`
Inherits:	Object
Defined in:	activesupport/lib/active_support/notifications/instrumenter.rb

Overview

A no-op instrumenter that executes blocks without publishing any notifications. Useful for disabling instrumentation on specific connections or components.

This is stateless and thread-safe, so a single instance can be shared.

ActiveSupport::Notifications.null_instrumenter.instrument("sql.active_record") do
# executes without any notification overhead
end

Constant Summary

NULL_HANDLE =
# File 'activesupport/lib/active_support/notifications/instrumenter.rb', line 22
```
NullHandle.new.freeze
```

Instance Method Summary

#build_handle(name, payload)
#finish(name, payload)
#instrument(name, payload = {}) {|payload| ... }
#start(name, payload)

Instance Method Details

#build_handle(name, payload)

[ GitHub ]

# File 'activesupport/lib/active_support/notifications/instrumenter.rb', line 28


def build_handle(name, payload)
  NULL_HANDLE
end

#finish(name, payload)

[ GitHub ]

# File 'activesupport/lib/active_support/notifications/instrumenter.rb', line 33


def finish(name, payload); end

#instrument(name, payload = {}) {|payload| ... }

Yields:

(payload)

[ GitHub ]

# File 'activesupport/lib/active_support/notifications/instrumenter.rb', line 24


def instrument(name, payload = {})
  yield payload if block_given?
end

#start(name, payload)

[ GitHub ]

# File 'activesupport/lib/active_support/notifications/instrumenter.rb', line 32


def start(name, payload); end