Class: Phronomy::Persistence::InMemory::Agents

Inherits:
Object
  • Object
show all
Defined in:
lib/phronomy/persistence/in_memory.rb

Instance Method Summary collapse

Constructor Details

#initialize(owner) ⇒ Agents

Returns a new instance of Agents.



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# File 'lib/phronomy/persistence/in_memory.rb', line 49

def initialize(owner) = @owner = owner

Instance Method Details

#create(root) ⇒ Object 



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# File 'lib/phronomy/persistence/in_memory.rb', line 51

def create(root)
  @owner.synchronize do
    key = root.agent_id.to_s
    raise ConflictError, "agent_id must not be empty" if key.empty?
    raise ConflictError, "agent already exists: #{key}" if @owner.state[:agents].key?(key)
    @owner.state[:agents][key] = root
  end
  root
end

#delete(agent_id) ⇒ Object 



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# File 'lib/phronomy/persistence/in_memory.rb', line 87

def delete(agent_id)
  @owner.synchronize { @owner.state[:agents].delete(agent_id.to_s) }
end

#load(agent_id) ⇒ Object 



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# File 'lib/phronomy/persistence/in_memory.rb', line 61

def load(agent_id)
  @owner.synchronize do
    @owner.state[:agents].fetch(agent_id.to_s) { raise NotFoundError, "agent not found: #{agent_id}" }
  end
end

#save(agent_id, expected_revision:, root:) ⇒ Object 



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# File 'lib/phronomy/persistence/in_memory.rb', line 67

def save(agent_id, expected_revision:, root:)
  @owner.synchronize do
    current = load(agent_id)
    unless current.agent_revision == expected_revision
      raise ConflictError,
        "agent revision conflict: expected #{expected_revision}, actual #{current.agent_revision}"
    end
    unless root.agent_id.to_s == agent_id.to_s
      raise ConflictError, "Agent root identity mismatch: #{root.agent_id} != #{agent_id}"
    end
    unless root.agent_revision == expected_revision + 1
      raise ConflictError,
        "agent save must advance revision exactly once: " \
        "expected #{expected_revision + 1}, got #{root.agent_revision}"
    end
    @owner.state[:agents][agent_id.to_s] = root
  end
  root
end