Function changeAndNotify

mcp/client.go:434–446

changeAndNotify is called when a feature is added or removed. It calls change, which should do the work and report whether a change actually occurred. If there was a change, it notifies a snapshot of the sessions.

(c *Client, notification string, params P, change func() bool)

// It calls change, which should do the work and report whether a change actually occurred.
// If there was a change, it notifies a snapshot of the sessions.
func changeAndNotify[P Params](c *Client, notification string, params P, change func() bool) {
	var sessions []*ClientSession
	// Lock for the change, but not for the notification.
	c.mu.Lock()
	if change() {
		// Check if listChanged is enabled for this notification type.
		if c.shouldSendListChangedNotification(notification) {
			sessions = slices.Clone(c.sessions)
		}
	}
	c.mu.Unlock()
	notifySessions(sessions, notification, params, c.opts.Logger)
}

// shouldSendListChangedNotification checks if the client's capabilities allow
// sending the given list-changed notification.