Module: SolidLoop::Mcp::ClientFactory

Defined in:
lib/solid_loop/mcp/client_factory.rb

Overview

Resolves an agent mcps entry into a transport and a protocol client. Three entry forms (name: is required in all):

{ name:, url:, api_token:, ... }  — HTTP sugar   -> Mcp::HttpTransport
{ name:, toolset: SearchTools }   — in-process    -> the toolset itself
{ name:, transport: object }      — general form  -> any Mcp::Transport

Class Method Summary collapse

Class Method Details

.client_for(mcp_config, context: nil) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
 
# File 'lib/solid_loop/mcp/client_factory.rb', line 11

def client_for(mcp_config, context: nil)
  validate_session_recovery!(mcp_config)

  SolidLoop::McpClient.new(
    transport:         transport_for(mcp_config),
    context:           context,
    initialize_params: mcp_config[:initialize_params] || {},
    stateless:         mcp_config.fetch(:stateless, transport_kind(mcp_config) != "http")
  )
end

.transport_for(mcp_config) ⇒ Object 



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/solid_loop/mcp/client_factory.rb', line 22

def transport_for(mcp_config)
  if (toolset = mcp_config[:toolset])
    toolset.is_a?(Class) ? toolset.new : toolset
  elsif mcp_config[:transport]
    mcp_config[:transport]
  elsif mcp_config[:url]
    HttpTransport.new(
      url:     mcp_config[:url],
      token:   mcp_config[:api_token] || ENV["MCP_API_TOKEN"],
      timeout: mcp_config[:timeout] || 60,
      headers: mcp_config[:custom_headers] || {}
    )
  else
    raise SolidLoop::McpError,
          "MCP config '#{mcp_config[:name]}' must provide url:, toolset:, or transport:"
  end
end

.transport_kind(mcp_config) ⇒ Object 



50
51
52
53
54
55
56
57
58
 
# File 'lib/solid_loop/mcp/client_factory.rb', line 50

def transport_kind(mcp_config)
  return "local" if mcp_config[:toolset]

  if (transport = mcp_config[:transport])
    return transport.is_a?(StdioTransport) ? "stdio" : "custom"
  end

  "http"
end

.validate_session_recovery!(mcp_config) ⇒ Object

Validated eagerly — a typo must surface at session init, not months later when a session actually expires.

Raises:



42
43
44
45
46
47
48
 
# File 'lib/solid_loop/mcp/client_factory.rb', line 42

def validate_session_recovery!(mcp_config)
  value = mcp_config.fetch(:session_recovery, :auto).to_sym
  return if %i[auto fail].include?(value)

  raise SolidLoop::McpError,
        "Invalid session_recovery #{value.inspect} for '#{mcp_config[:name]}' (use :auto or :fail)"
end