Struct ServerSession

mcp/server.go:1107–1121

A ServerSession is a logical connection from a single MCP client. Its methods can be used to send requests or notifications to the client. Create a session by calling [Server.Connect]. Call [ServerSession.Close] to close the connection, or await client termination with [ServerSession.Wait].

// Call [ServerSession.Close] to close the connection, or await client
// termination with [ServerSession.Wait].
type ServerSession struct {
	// Ensure that onClose is called at most once.
	// We defensively use an atomic CompareAndSwap rather than a sync.Once, in case the
	// onClose callback triggers a re-entrant call to Close.
	calledOnClose atomic.Bool
	onClose       func()

	server          *Server
	conn            *jsonrpc2.Connection
	mcpConn         Connection
	keepaliveCancel context.CancelFunc

	mu    sync.Mutex
	state ServerSessionState
}

func (ss *ServerSession) updateState(mut func(*ServerSessionState)) {
	ss.mu.Lock()