Class: Eventus::Stream

Inherits:
Object
  • Object
show all
Defined in:
lib/eventus/stream.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, persistence, dispatcher) ⇒ Stream

Returns a new instance of Stream.



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# File 'lib/eventus/stream.rb', line 8

def initialize(id, persistence, dispatcher)
  @id = id
  @persistence = persistence
  @committed_events = []
  @uncommitted_events = []
  @dispatcher = dispatcher
  load_events @persistence.load(id)
end

Instance Attribute Details

#committed_events ⇒ Object (readonly)

Returns the value of attribute committed_events.



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# File 'lib/eventus/stream.rb', line 6

def committed_events
  @committed_events
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/eventus/stream.rb', line 6

def id
  @id
end

#uncommitted_events ⇒ Object (readonly)

Returns the value of attribute uncommitted_events.



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# File 'lib/eventus/stream.rb', line 6

def uncommitted_events
  @uncommitted_events
end

Instance Method Details

#add(name, body = {}) ⇒ Object 



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# File 'lib/eventus/stream.rb', line 17

def add(name, body={})
  @uncommitted_events << {'name' => name, 'body' => body}
end

#commit ⇒ Object 



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# File 'lib/eventus/stream.rb', line 21

def commit
  time = Time.now.utc.iso8601
  @uncommitted_events.each.with_index(version) do |e, i|
    e['time'] = time
    e['sid'] = @id
    e['sequence'] = i
  end
  Eventus::logger.debug "Committing #{@uncommitted_events.length} events to #{@id}"
  return if @uncommitted_events.empty?
  payload = @persistence.commit @uncommitted_events
  load_events @uncommitted_events
  @dispatcher.dispatch(payload) if @dispatcher
  @uncommitted_events.clear
rescue ConcurrencyError => e
  Eventus.logger.info "ConcurrencyError, loading new events for: #{id}"
  load_events @persistence.load(id, version)
  raise e
end

#version ⇒ Object 



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# File 'lib/eventus/stream.rb', line 40

def version
  @committed_events.length
end