forked from spotify/ffwd-ruby
/
plugin_channel.rb
64 lines (54 loc) · 1.78 KB
/
plugin_channel.rb
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# $LICENSE
# Copyright 2013-2014 Spotify AB. All rights reserved.
#
# The contents of this file are licensed under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
require_relative 'lifecycle'
require_relative 'logging'
require_relative 'reporter'
module FFWD
# A set of channels, one for metrics and one for events.
# This is simply a convenience class to group the channel that are available
# to a plugin in one direction (usually either input or output).
class PluginChannel
include FFWD::Lifecycle
include FFWD::Reporter
include FFWD::Logging
setup_reporter :keys => [:metrics, :events]
attr_reader :id, :events, :metrics, :reporter_meta
def self.build id
events = FFWD::Channel.new log, "#{id}.events"
metrics = FFWD::Channel.new log, "#{id}.metrics"
new id, metrics, events
end
def initialize id, events, metrics
@id = id
@events = events
@metrics = metrics
@reporter_meta = {:plugin_channel => @id, :type => "plugin_channel"}
end
def event_subscribe &block
@events.subscribe(&block)
end
def event event
@events << event
increment :events
end
def metric_subscribe &block
@metrics.subscribe(&block)
end
def metric metric
@metrics << metric
increment :metrics
end
end
end