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require 'delegate'
module Flipper
module Adapters
# Internal: Adapter that wraps another adapter and instruments all adapter
# operations.
class Instrumented < SimpleDelegator
include ::Flipper::Adapter
# Private: The name of instrumentation events.
InstrumentationName = "adapter_operation.#{InstrumentationNamespace}".freeze
# Private: What is used to instrument all the things.
attr_reader :instrumenter
# Public: The name of the adapter.
attr_reader :name
# Internal: Initializes a new adapter instance.
#
# adapter - Vanilla adapter instance to wrap.
#
# options - The Hash of options.
# :instrumenter - What to use to instrument all the things.
#
def initialize(adapter, options = {})
super(adapter)
@adapter = adapter
@name = :instrumented
@instrumenter = options.fetch(:instrumenter, Instrumenters::Noop)
end
# Public
def features
default_payload = {
operation: :features,
adapter_name: @adapter.name,
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.features
end
end
# Public
def add(feature)
default_payload = {
operation: :add,
adapter_name: @adapter.name,
feature_name: feature.name,
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.add(feature)
end
end
# Public
def remove(feature)
default_payload = {
operation: :remove,
adapter_name: @adapter.name,
feature_name: feature.name,
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.remove(feature)
end
end
# Public
def clear(feature)
default_payload = {
operation: :clear,
adapter_name: @adapter.name,
feature_name: feature.name,
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.clear(feature)
end
end
# Public
def get(feature)
default_payload = {
operation: :get,
adapter_name: @adapter.name,
feature_name: feature.name,
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.get(feature)
end
end
def get_multi(features)
default_payload = {
operation: :get_multi,
adapter_name: @adapter.name,
feature_names: features.map(&:name),
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.get_multi(features)
end
end
def get_all
default_payload = {
operation: :get_all,
adapter_name: @adapter.name,
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.get_all
end
end
# Public
def enable(feature, gate, thing)
default_payload = {
operation: :enable,
adapter_name: @adapter.name,
feature_name: feature.name,
gate_name: gate.name,
thing_value: thing.value,
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.enable(feature, gate, thing)
end
end
# Public
def disable(feature, gate, thing)
default_payload = {
operation: :disable,
adapter_name: @adapter.name,
feature_name: feature.name,
gate_name: gate.name,
thing_value: thing.value,
}
@instrumenter.instrument(InstrumentationName, default_payload) do |payload|
payload[:result] = @adapter.disable(feature, gate, thing)
end
end
end
end
end
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