micro/logger/wrapper/wrapper.go

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// Package wrapper provides wrapper for Logger
package wrapper
import (
"context"
"fmt"
"go.unistack.org/micro/v3/client"
"go.unistack.org/micro/v3/logger"
"go.unistack.org/micro/v3/server"
)
var (
// DefaultClientCallObserver called by wrapper in client Call
DefaultClientCallObserver = func(ctx context.Context, req client.Request, rsp interface{}, opts []client.CallOption, err error) []string {
labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
if err != nil {
labels = append(labels, "error", err.Error())
}
return labels
}
// DefaultClientStreamObserver called by wrapper in client Stream
DefaultClientStreamObserver = func(ctx context.Context, req client.Request, opts []client.CallOption, stream client.Stream, err error) []string {
labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
if err != nil {
labels = append(labels, "error", err.Error())
}
return labels
}
// DefaultClientPublishObserver called by wrapper in client Publish
DefaultClientPublishObserver = func(ctx context.Context, msg client.Message, opts []client.PublishOption, err error) []string {
labels := []string{"endpoint", msg.Topic()}
if err != nil {
labels = append(labels, "error", err.Error())
}
return labels
}
// DefaultServerHandlerObserver called by wrapper in server Handler
DefaultServerHandlerObserver = func(ctx context.Context, req server.Request, rsp interface{}, err error) []string {
labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
if err != nil {
labels = append(labels, "error", err.Error())
}
return labels
}
// DefaultServerSubscriberObserver called by wrapper in server Subscriber
DefaultServerSubscriberObserver = func(ctx context.Context, msg server.Message, err error) []string {
labels := []string{"endpoint", msg.Topic()}
if err != nil {
labels = append(labels, "error", err.Error())
}
return labels
}
// DefaultClientCallFuncObserver called by wrapper in client CallFunc
DefaultClientCallFuncObserver = func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions, err error) []string {
labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
if err != nil {
labels = append(labels, "error", err.Error())
}
return labels
}
// DefaultSkipEndpoints wrapper not called for this endpoints
DefaultSkipEndpoints = []string{"Meter.Metrics", "Health.Live", "Health.Ready", "Health.Version"}
)
type lWrapper struct {
client.Client
serverHandler server.HandlerFunc
serverSubscriber server.SubscriberFunc
clientCallFunc client.CallFunc
opts Options
}
type (
// ClientCallObserver func signature
ClientCallObserver func(context.Context, client.Request, interface{}, []client.CallOption, error) []string
// ClientStreamObserver func signature
ClientStreamObserver func(context.Context, client.Request, []client.CallOption, client.Stream, error) []string
// ClientPublishObserver func signature
ClientPublishObserver func(context.Context, client.Message, []client.PublishOption, error) []string
// ClientCallFuncObserver func signature
ClientCallFuncObserver func(context.Context, string, client.Request, interface{}, client.CallOptions, error) []string
// ServerHandlerObserver func signature
ServerHandlerObserver func(context.Context, server.Request, interface{}, error) []string
// ServerSubscriberObserver func signature
ServerSubscriberObserver func(context.Context, server.Message, error) []string
)
// Options struct for wrapper
type Options struct {
// Logger that used for log
Logger logger.Logger
// ServerHandlerObservers funcs
ServerHandlerObservers []ServerHandlerObserver
// ServerSubscriberObservers funcs
ServerSubscriberObservers []ServerSubscriberObserver
// ClientCallObservers funcs
ClientCallObservers []ClientCallObserver
// ClientStreamObservers funcs
ClientStreamObservers []ClientStreamObserver
// ClientPublishObservers funcs
ClientPublishObservers []ClientPublishObserver
// ClientCallFuncObservers funcs
ClientCallFuncObservers []ClientCallFuncObserver
// SkipEndpoints
SkipEndpoints []string
// Level for logger
Level logger.Level
// Enabled flag
Enabled bool
}
// Option func signature
type Option func(*Options)
// NewOptions creates Options from Option slice
func NewOptions(opts ...Option) Options {
options := Options{
Logger: logger.DefaultLogger,
Level: logger.TraceLevel,
ClientCallObservers: []ClientCallObserver{DefaultClientCallObserver},
ClientStreamObservers: []ClientStreamObserver{DefaultClientStreamObserver},
ClientPublishObservers: []ClientPublishObserver{DefaultClientPublishObserver},
ClientCallFuncObservers: []ClientCallFuncObserver{DefaultClientCallFuncObserver},
ServerHandlerObservers: []ServerHandlerObserver{DefaultServerHandlerObserver},
ServerSubscriberObservers: []ServerSubscriberObserver{DefaultServerSubscriberObserver},
SkipEndpoints: DefaultSkipEndpoints,
}
for _, o := range opts {
o(&options)
}
return options
}
// WithEnabled enable/diable flag
func WithEnabled(b bool) Option {
return func(o *Options) {
o.Enabled = b
}
}
// WithLevel log level
func WithLevel(l logger.Level) Option {
return func(o *Options) {
o.Level = l
}
}
// WithLogger logger
func WithLogger(l logger.Logger) Option {
return func(o *Options) {
o.Logger = l
}
}
// WithClientCallObservers funcs
func WithClientCallObservers(ob ...ClientCallObserver) Option {
return func(o *Options) {
o.ClientCallObservers = ob
}
}
// WithClientStreamObservers funcs
func WithClientStreamObservers(ob ...ClientStreamObserver) Option {
return func(o *Options) {
o.ClientStreamObservers = ob
}
}
// WithClientPublishObservers funcs
func WithClientPublishObservers(ob ...ClientPublishObserver) Option {
return func(o *Options) {
o.ClientPublishObservers = ob
}
}
// WithClientCallFuncObservers funcs
func WithClientCallFuncObservers(ob ...ClientCallFuncObserver) Option {
return func(o *Options) {
o.ClientCallFuncObservers = ob
}
}
// WithServerHandlerObservers funcs
func WithServerHandlerObservers(ob ...ServerHandlerObserver) Option {
return func(o *Options) {
o.ServerHandlerObservers = ob
}
}
// WithServerSubscriberObservers funcs
func WithServerSubscriberObservers(ob ...ServerSubscriberObserver) Option {
return func(o *Options) {
o.ServerSubscriberObservers = ob
}
}
// SkipEndpoins
func SkipEndpoints(eps ...string) Option {
return func(o *Options) {
o.SkipEndpoints = append(o.SkipEndpoints, eps...)
}
}
func (l *lWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
err := l.Client.Call(ctx, req, rsp, opts...)
endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
for _, ep := range l.opts.SkipEndpoints {
if ep == endpoint {
return err
}
}
if !l.opts.Enabled {
return err
}
var labels []string
for _, o := range l.opts.ClientCallObservers {
labels = append(labels, o(ctx, req, rsp, opts, err)...)
}
l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
return err
}
func (l *lWrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
stream, err := l.Client.Stream(ctx, req, opts...)
endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
for _, ep := range l.opts.SkipEndpoints {
if ep == endpoint {
return stream, err
}
}
if !l.opts.Enabled {
return stream, err
}
var labels []string
for _, o := range l.opts.ClientStreamObservers {
labels = append(labels, o(ctx, req, opts, stream, err)...)
}
l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
return stream, err
}
func (l *lWrapper) Publish(ctx context.Context, msg client.Message, opts ...client.PublishOption) error {
err := l.Client.Publish(ctx, msg, opts...)
endpoint := msg.Topic()
for _, ep := range l.opts.SkipEndpoints {
if ep == endpoint {
return err
}
}
if !l.opts.Enabled {
return err
}
var labels []string
for _, o := range l.opts.ClientPublishObservers {
labels = append(labels, o(ctx, msg, opts, err)...)
}
l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
return err
}
func (l *lWrapper) ServerHandler(ctx context.Context, req server.Request, rsp interface{}) error {
err := l.serverHandler(ctx, req, rsp)
endpoint := req.Endpoint()
for _, ep := range l.opts.SkipEndpoints {
if ep == endpoint {
return err
}
}
if !l.opts.Enabled {
return err
}
var labels []string
for _, o := range l.opts.ServerHandlerObservers {
labels = append(labels, o(ctx, req, rsp, err)...)
}
l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
return err
}
func (l *lWrapper) ServerSubscriber(ctx context.Context, msg server.Message) error {
err := l.serverSubscriber(ctx, msg)
endpoint := msg.Topic()
for _, ep := range l.opts.SkipEndpoints {
if ep == endpoint {
return err
}
}
if !l.opts.Enabled {
return err
}
var labels []string
for _, o := range l.opts.ServerSubscriberObservers {
labels = append(labels, o(ctx, msg, err)...)
}
l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
return err
}
// NewClientWrapper accepts an open options and returns a Client Wrapper
func NewClientWrapper(opts ...Option) client.Wrapper {
return func(c client.Client) client.Client {
options := NewOptions()
for _, o := range opts {
o(&options)
}
return &lWrapper{opts: options, Client: c}
}
}
// NewClientCallWrapper accepts an options and returns a Call Wrapper
func NewClientCallWrapper(opts ...Option) client.CallWrapper {
return func(h client.CallFunc) client.CallFunc {
options := NewOptions()
for _, o := range opts {
o(&options)
}
l := &lWrapper{opts: options, clientCallFunc: h}
return l.ClientCallFunc
}
}
func (l *lWrapper) ClientCallFunc(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
err := l.clientCallFunc(ctx, addr, req, rsp, opts)
endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
for _, ep := range l.opts.SkipEndpoints {
if ep == endpoint {
return err
}
}
if !l.opts.Enabled {
return err
}
var labels []string
for _, o := range l.opts.ClientCallFuncObservers {
labels = append(labels, o(ctx, addr, req, rsp, opts, err)...)
}
l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
return err
}
// NewServerHandlerWrapper accepts an options and returns a Handler Wrapper
func NewServerHandlerWrapper(opts ...Option) server.HandlerWrapper {
return func(h server.HandlerFunc) server.HandlerFunc {
options := NewOptions()
for _, o := range opts {
o(&options)
}
l := &lWrapper{opts: options, serverHandler: h}
return l.ServerHandler
}
}
// NewServerSubscriberWrapper accepts an options and returns a Subscriber Wrapper
func NewServerSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
return func(h server.SubscriberFunc) server.SubscriberFunc {
options := NewOptions()
for _, o := range opts {
o(&options)
}
l := &lWrapper{opts: options, serverSubscriber: h}
return l.ServerSubscriber
}
}