108 lines
2.6 KiB
Go
108 lines
2.6 KiB
Go
package requestid
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import (
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"context"
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"net/textproto"
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"github.com/google/uuid"
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"github.com/unistack-org/micro/v3/client"
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"github.com/unistack-org/micro/v3/metadata"
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"github.com/unistack-org/micro/v3/server"
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)
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var (
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// MetadataKey contains metadata key
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MetadataKey = textproto.CanonicalMIMEHeaderKey("x-request-id")
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)
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var (
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// MetadataFunc wil be used if user not provide own func to fill metadata
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MetadataFunc = func(ctx context.Context) (context.Context, error) {
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_, ok := metadata.Get(ctx, MetadataKey)
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if ok {
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return ctx, nil
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}
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id, err := uuid.NewRandom()
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if err != nil {
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return ctx, err
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}
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ctx = metadata.Set(ctx, MetadataKey, id.String())
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return ctx, nil
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}
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)
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type wrapper struct {
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client.Client
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}
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func NewClientWrapper() client.Wrapper {
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return func(c client.Client) client.Client {
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handler := &wrapper{
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Client: c,
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}
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return handler
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}
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}
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func NewClientCallWrapper() client.CallWrapper {
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return func(fn client.CallFunc) client.CallFunc {
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return func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
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var err error
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if ctx, err = MetadataFunc(ctx); err != nil {
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return err
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}
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return fn(ctx, addr, req, rsp, opts)
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}
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}
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}
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func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
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var err error
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if ctx, err = MetadataFunc(ctx); err != nil {
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return err
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}
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return w.Client.Call(ctx, req, rsp, opts...)
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}
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func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
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var err error
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if ctx, err = MetadataFunc(ctx); err != nil {
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return nil, err
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}
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return w.Client.Stream(ctx, req, opts...)
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}
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func (w *wrapper) Publish(ctx context.Context, msg client.Message, opts ...client.PublishOption) error {
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var err error
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if ctx, err = MetadataFunc(ctx); err != nil {
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return err
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}
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return w.Client.Publish(ctx, msg, opts...)
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}
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func NewServerHandlerWrapper() server.HandlerWrapper {
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return func(fn server.HandlerFunc) server.HandlerFunc {
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return func(ctx context.Context, req server.Request, rsp interface{}) error {
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var err error
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if ctx, err = MetadataFunc(ctx); err != nil {
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return err
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}
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return fn(ctx, req, rsp)
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}
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}
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}
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func NewServerSubscriberWrapper() server.SubscriberWrapper {
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return func(fn server.SubscriberFunc) server.SubscriberFunc {
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return func(ctx context.Context, msg server.Message) error {
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var err error
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if id, ok := msg.Header()[MetadataKey]; ok {
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ctx = metadata.Set(ctx, MetadataKey, id)
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} else if ctx, err = MetadataFunc(ctx); err != nil {
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return err
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}
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return fn(ctx, msg)
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}
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}
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}
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