Class: Igniter::Extensions::Contracts::Saga::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/igniter/extensions/contracts/saga/runner.rb

Instance Method Summary collapse

Constructor Details

#initialize(compiled_graph:, profile:, compensations:) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/igniter/extensions/contracts/saga/runner.rb', line 10

def initialize(compiled_graph:, profile:, compensations:)
  @compiled_graph = compiled_graph
  @profile = profile
  @compensations = normalize_compensations(compensations)
end

Instance Method Details

#run(inputs:) ⇒ Object 



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# File 'lib/igniter/extensions/contracts/saga/runner.rb', line 16

def run(inputs:)
  state = Igniter::Contracts::MutableNamedValues.new
  outputs = Igniter::Contracts::MutableNamedValues.new
  normalized_inputs = Igniter::Contracts::NamedValues.new(inputs)
  completed_operations = []
  failed_operation = nil

  @compiled_graph.operations.each do |operation|
    failed_operation = operation
    handler = @profile.runtime_handler(operation.kind)
    value = handler.call(
      operation: operation,
      state: state,
      outputs: outputs,
      inputs: normalized_inputs,
      profile: @profile
    )

    state.write(operation.name, value) unless operation.output?
    outputs.write(operation.name, value) if operation.output?
    completed_operations << operation unless operation.output?
  end

  Result.new(
    success: true,
    execution_result: execution_result_for(state, outputs)
  )
rescue StandardError => e
  execution_result = execution_result_for(state, outputs)

  Result.new(
    success: false,
    execution_result: execution_result,
    error: e,
    failed_node: failed_operation&.name,
    compensations: run_compensations(
      completed_operations.reverse,
      execution_result: execution_result,
      inputs: normalized_inputs
    )
  )
end