package health import ( "context" "github.com/unistack-org/micro/v3/codec" "github.com/unistack-org/micro/v3/errors" "github.com/unistack-org/micro/v3/server" ) var ( // guard to fail early _ HealthServer = &handler{} ) type handler struct { server server.Server opts Options } type CheckFunc func(context.Context) error type Option func(*Options) type Options struct { LiveChecks []CheckFunc ReadyChecks []CheckFunc Version string Name string } func LiveChecks(fns ...CheckFunc) Option { return func(o *Options) { o.LiveChecks = append(o.LiveChecks, fns...) } } func ReadyChecks(fns ...CheckFunc) Option { return func(o *Options) { o.ReadyChecks = append(o.ReadyChecks, fns...) } } func Name(name string) Option { return func(o *Options) { o.Name = name } } func Version(version string) Option { return func(o *Options) { o.Version = version } } func NewHandler(opts ...Option) *handler { options := Options{} for _, o := range opts { o(&options) } return &handler{opts: options} } func (h *handler) Live(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error { var err error for _, fn := range h.opts.LiveChecks { if err = fn(ctx); err != nil { return errors.ServiceUnavailable(h.opts.Name, "%v", err) } } return nil } func (h *handler) Ready(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error { var err error for _, fn := range h.opts.ReadyChecks { if err = fn(ctx); err != nil { return errors.ServiceUnavailable(h.opts.Name, "%v", err) } } return nil } func (h *handler) Version(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error { rsp.Data = []byte(h.opts.Version) return nil }