Module: Legion::MCP::CatalogDispatcher

Extended by:
Logging::Helper
Defined in:
lib/legion/mcp/catalog_dispatcher.rb

Class Method Summary collapse

Class Method Details

.build_tool_class(entry) ⇒ Object 



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# File 'lib/legion/mcp/catalog_dispatcher.rb', line 42

def build_tool_class(entry)
  runner_class_str = entry[:runner_class]
  function_name    = entry[:function]
  tool_name_val    = entry[:tool_name]
  desc             = entry[:description]
  schema           = entry[:input_schema] || { properties: {} }
  category         = entry[:category]
  tier             = entry[:tier]

  klass = Class.new(::MCP::Tool) do
    tool_name tool_name_val
    description desc
    input_schema(schema)
    define_singleton_method(:mcp_category) { category }
    define_singleton_method(:mcp_tier)     { tier }
    define_singleton_method(:catalog_entry) { true }
  end
  klass.extend(Legion::Logging::Helper)

  wire_dispatch(klass, runner_class_str, function_name, tool_name_val)
  klass
end

.dispatch(runner_class:, function:, params:, source: :mcp) ⇒ Object 



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# File 'lib/legion/mcp/catalog_dispatcher.rb', line 17

def dispatch(runner_class:, function:, params:, source: :mcp)
  mcp_log :info, 'catalog.dispatch.start',
          runner_class: runner_class, function: function, source: source,
          params: Utils.summarize_params(params)
  unless defined?(Legion::Ingress)
    mcp_log :warn, 'catalog.dispatch.skipped',
            runner_class: runner_class, function: function,
            reason: 'ingress unavailable'
    return nil
  end

  result = Legion::Ingress.run(
    payload:       params,
    runner_class:  runner_class,
    function:      function.to_sym,
    source:        source,
    check_subtask: true,
    generate_task: true
  )
  mcp_log :info, 'catalog.dispatch.complete',
          runner_class: runner_class, function: function, source: source,
          result: Utils.summarize_result(result)
  result
end

.generate_tools_from_catalog ⇒ Object 



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# File 'lib/legion/mcp/catalog_dispatcher.rb', line 96

def generate_tools_from_catalog
  return [] unless Legion::Settings::Extensions.respond_to?(:tools)

  Legion::Settings::Extensions.tools.filter_map do |tool_entry|
    ToolAdapter.from_registry_entry(tool_entry) if defined?(ToolAdapter) && ToolAdapter.respond_to?(:from_registry_entry)
  rescue StandardError => e
    handle_exception(e, level: :debug, operation: 'legion.mcp.catalog_dispatcher.generate_tools_from_catalog')
    nil
  end
end

.mcp_log(level, event, **fields) ⇒ Object 



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# File 'lib/legion/mcp/catalog_dispatcher.rb', line 13

def mcp_log(level, event, **fields)
  log.public_send(level, "[mcp] #{event} #{Utils.format_fields(fields)}")
end

.wire_dispatch(klass, runner_class_str, function_name, tool_name_val) ⇒ Object 



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# File 'lib/legion/mcp/catalog_dispatcher.rb', line 65

def wire_dispatch(klass, runner_class_str, function_name, tool_name_val)
  klass.define_singleton_method(:call) do |**params|
    log.info("[mcp] catalog.tool_call.start #{Utils.format_fields(
      tool_name: tool_name_val, runner_class: runner_class_str,
      function: function_name, params: Utils.summarize_params(params)
    )}")
    result = CatalogDispatcher.dispatch(
      runner_class: runner_class_str,
      function:     function_name,
      params:       params
    )

    if result.nil?
      text = Legion::JSON.dump({ error: 'Ingress not available' })
      ::MCP::Tool::Response.new([{ type: 'text', text: text }], error: true)
    else
      text = Legion::JSON.dump(result)
      response = ::MCP::Tool::Response.new([{ type: 'text', text: text }])
      log.info("[mcp] catalog.tool_call.complete #{Utils.format_fields(
        tool_name: tool_name_val, runner_class: runner_class_str,
        function: function_name, result: Utils.summarize_result(response)
      )}")
      response
    end
  rescue StandardError => e
    handle_exception(e, level: :warn, operation: 'legion.mcp.catalog_dispatcher.call')
    text = Legion::JSON.dump({ error: e.message })
    ::MCP::Tool::Response.new([{ type: 'text', text: text }], error: true)
  end
end