Class: MessageStore::Get::Substitute

Inherits:
Object
  • Object
show all
Includes:
Initializer, MessageStore::Get, Virtual
Defined in:
lib/message_store/get/substitute.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from MessageStore::Get

included

Instance Attribute Details

#batch_size ⇒ Object 



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# File 'lib/message_store/get/substitute.rb', line 11

def batch_size
  @batch_size ||= 1
end

#stream_name ⇒ Object

Returns the value of attribute stream_name.



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# File 'lib/message_store/get/substitute.rb', line 9

def stream_name
  @stream_name
end

Class Method Details

.build ⇒ Object 



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# File 'lib/message_store/get/substitute.rb', line 20

def self.build
  new
end

.category_stream?(stream_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/message_store/get/substitute.rb', line 67

def self.category_stream?(stream_name)
  StreamName.category?(stream_name)
end

Instance Method Details

#call(position) ⇒ Object 



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# File 'lib/message_store/get/substitute.rb', line 24

def call(position)
  position ||= 0

  logger.trace(tag: :get) { "Getting (Position: #{position}, Stream Name: #{stream_name.inspect}, Batch Size: #{batch_size})" }

  logger.debug(tag: :data) { "Items: \n#{items.pretty_inspect}" }
  logger.debug(tag: :data) { "Position: #{position.inspect}" }
  logger.debug(tag: :data) { "Batch Size: #{batch_size.inspect}" }

  # No specialized Gets for substitute
  # Complexity has to be inline for the control
  # Scott, Tue Oct 1 2019
  unless self.class.category_stream?(stream_name)
    index = (items.index { |i| i.position >= position })
  else
    index = (items.index { |i| i.global_position >= position })
  end

  logger.debug(tag: :data) { "Index: #{index.inspect}" }

  if index.nil?
    items = []
  else
    range = index..(index + batch_size - 1)
    logger.debug(tag: :data) { "Range: #{range.pretty_inspect}" }

    items = self.items[range]
  end

  logger.info(tag: :data) { "Got: \n#{items.pretty_inspect}" }
  logger.info(tag: :get) { "Finished getting (Position: #{position}, Stream Name: #{stream_name.inspect})" }

  items
end

#items ⇒ Object 



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# File 'lib/message_store/get/substitute.rb', line 16

def items
  @items ||= []
end

#last_position(batch) ⇒ Object 



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# File 'lib/message_store/get/substitute.rb', line 59

def last_position(batch)
  if self.class.category_stream?(stream_name)
    batch.last.global_position
  else
    batch.last.position
  end
end