Class: Cosmos::ReactionBase

Inherits:
Object show all
Defined in:
lib/cosmos/microservices/reaction_microservice.rb

Overview

This should remain a thread safe implamentation. This is the in memory cache that should mirror the database. This will update two hash variables and will track triggers to lookup what triggers link to what reactions.

Instance Method Summary collapse

Constructor Details

#initialize(scope:) ⇒ ReactionBase

Returns a new instance of ReactionBase.



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 37

def initialize(scope:)
  @scope = scope
  @reactions_mutex = Mutex.new
  @reactions = Hash.new
  @lookup_mutex = Mutex.new
  @lookup = Hash.new
end

Instance Method Details

#add(reaction:) ⇒ Object

Add a reaction to the in memory database



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 127

def add(reaction:)
  reaction_name = reaction['name']
  @reactions_mutex.synchronize do
    @reactions[reaction_name] = reaction
  end
  reaction['triggers'].each do | trigger |
    trigger_name = trigger['name']
    @lookup_mutex.synchronize do 
      if @lookup[trigger_name].nil?
        @lookup[trigger_name] = [reaction_name]
      else
        @lookup[trigger_name] << reaction_name
      end
    end
  end
end

#get_reactions(trigger_name:) ⇒ Object

RETURNS an Array of active and not snoozed reactions



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 62

def get_reactions(trigger_name:)
  array_value = nil
  @lookup_mutex.synchronize do
    array_value = Marshal.load( Marshal.dump(@lookup[trigger_name]) )
  end
  ret = Array.new
  return ret unless array_value
  array_value.each do | name |
    @reactions_mutex.synchronize do
      data = Marshal.load( Marshal.dump(@reactions[name]) )
      reaction = ReactionModel.from_json(data, name: data['name'], scope: data['scope'])
      ret << reaction if reaction.active && reaction.snoozed_until.nil?
    end
  end
  return ret
end

#get_snoozed ⇒ Object

RETURNS an Array of active and not snoozed reactions



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 46

def get_snoozed
  data = nil
  @reactions_mutex.synchronize do
    data = Marshal.load( Marshal.dump(@reactions) )
  end
  ret = Array.new
  return ret unless data
  data.each do | _name, r_hash |
    data = Marshal.load( Marshal.dump(r_hash) )
    reaction = ReactionModel.from_json(data, name: data['name'], scope: data['scope'])
    ret << reaction if reaction.active && reaction.snoozed_until
  end
  return ret
end

#remove(reaction:) ⇒ Object

Removes a reaction to the in memory database.



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 154

def remove(reaction:)
  reaction_name = reaction['name']
  @reactions_mutex.synchronize do
    @reactions.delete(reaction_name)
  end
  reaction['triggers'].each do | trigger |
    trigger_name = trigger['name']
    @lookup_mutex.synchronize do 
      @lookup[trigger_name].delete(reaction_name)
    end
  end
end

#setup(reactions:) ⇒ Object

Update the memeory database with a HASH of reactions from the external database



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 81

def setup(reactions:)
  @reactions_mutex.synchronize do
    @reactions = Marshal.load( Marshal.dump(reactions) )
  end
  @lookup_mutex.synchronize do
    @lookup = Hash.new
    reactions.each do | reaction_name, reaction |
      reaction['triggers'].each do | trigger |
        trigger_name = trigger['name']
        if @lookup[trigger_name].nil?
          @lookup[trigger_name] = [reaction_name]
        else
          @lookup[trigger_name] << reaction_name
        end
      end
    end
  end
end

#sleep(name:) ⇒ Object

Pulls the latest reaction name from the in memory database to see if the reaction should be put to sleep.



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 102

def sleep(name:)
  @reactions_mutex.synchronize do
    data = Marshal.load( Marshal.dump(@reactions[name]) )
    return unless data
    reaction = ReactionModel.from_json(data, name: data['name'], scope: data['scope'])
    if reaction.snoozed_until.nil? || Time.now.to_i >= reaction.snoozed_until
      reaction.sleep()
    end
    @reactions[name] = reaction.as_json
  end
end

#update(reaction:) ⇒ Object

Updates a reaction to the in memory database. This current does not update the lookup Hash for the triggers.



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 146

def update(reaction:)
  reaction_name = reaction['name']
  @reactions_mutex.synchronize do
    @reactions[reaction_name] = reaction
  end
end

#wake(name:) ⇒ Object

Pulls the latest reaction name from the in memory database to see if the reaction should be awaken.



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# File 'lib/cosmos/microservices/reaction_microservice.rb', line 116

def wake(name:)
  @reactions_mutex.synchronize do
    data = Marshal.load( Marshal.dump(@reactions[name]) )
    return unless data
    reaction = ReactionModel.from_json(data, name: data['name'], scope: data['scope'])
    reaction.awaken()
    @reactions[name] = reaction.as_json
  end
end