Class: Norikra::OutputPool

Inherits:
Object
  • Object
show all
Defined in:
lib/norikra/output_pool.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ OutputPool

Returns a new instance of OutputPool.



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# File 'lib/norikra/output_pool.rb', line 7

def initialize
  @pool = {} # { query_name => [events] }
  @groups = {} # { group_name => Set(query_names) }
  @mutex = Mutex.new
end

Instance Attribute Details

#pool ⇒ Object

Returns the value of attribute pool.



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# File 'lib/norikra/output_pool.rb', line 5

def pool
  @pool
end

Instance Method Details

#fetch(query_name) ⇒ Object

returns [[time, event], …], but not remove from pool



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# File 'lib/norikra/output_pool.rb', line 46

def fetch(query_name)
  events = @mutex.synchronize do
    @pool.fetch(query_name, [])
  end
  events.reduce(&:+) || []
end

#pop(query_name) ⇒ Object

returns [[time(int from epoch), event], …], event: hash



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# File 'lib/norikra/output_pool.rb', line 54

def pop(query_name)
  events = @mutex.synchronize do
    @pool.delete(query_name) || []
  end
  events.reduce(&:+) || []
end

#push(query_name, query_group, events) ⇒ Object

events must be [time(int), event_record]



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# File 'lib/norikra/output_pool.rb', line 29

def push(query_name, query_group, events) # events must be [time(int), event_record]
  # called with blank events for window leavings (and/or other situations)
  return if events.size < 1

  @mutex.synchronize do
    if @groups[query_group]
      @groups[query_group].add(query_name) # Set is unique set of elements
    else
      @groups[query_group] ||= Set.new([query_name])
    end

    @pool[query_name] ||= []
    @pool[query_name].push(events)
  end
end

#queries ⇒ Object 



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# File 'lib/norikra/output_pool.rb', line 13

def queries
  @pool.keys
end

#remove(query_name, query_group) ⇒ Object 



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# File 'lib/norikra/output_pool.rb', line 17

def remove(query_name, query_group)
  @mutex.synchronize do
    group = @groups[query_group]
    if group
      group.delete(query_name)
    end
    @groups.delete(query_name)
    @pool.delete(query_name)
  end
  nil
end

#sweep(group = nil) ⇒ Object

returns => [[time, event], …]



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# File 'lib/norikra/output_pool.rb', line 62

def sweep(group=nil)
  return {} if @groups[group].nil?

  ret = {}
  sweep_pool = @mutex.synchronize do
    sweeped = {}
    @groups[group].each do |qname|
      sweeped[qname] = @pool.delete(qname) if @pool[qname] && @pool[qname].size > 0
    end
    sweeped
  end
  sweep_pool.keys.each do |k|
    ret[k] = sweep_pool[k].reduce(&:+) || []
  end
  ret
end