trace wrapper
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parent
a997a86e49
commit
4a6570a772
@ -5,6 +5,7 @@ import (
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"github.com/micro/go-micro/client"
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"github.com/micro/go-micro/client"
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"github.com/micro/go-micro/debug/stats"
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"github.com/micro/go-micro/debug/stats"
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"github.com/micro/go-micro/debug/trace"
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"github.com/micro/go-micro/metadata"
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"github.com/micro/go-micro/metadata"
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"github.com/micro/go-micro/server"
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"github.com/micro/go-micro/server"
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)
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)
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@ -14,6 +15,13 @@ type clientWrapper struct {
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headers metadata.Metadata
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headers metadata.Metadata
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}
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}
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type traceWrapper struct {
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client.Client
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name string
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trace trace.Trace
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}
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var (
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var (
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HeaderPrefix = "Micro-"
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HeaderPrefix = "Micro-"
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)
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)
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@ -48,6 +56,20 @@ func (c *clientWrapper) Publish(ctx context.Context, p client.Message, opts ...c
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return c.Client.Publish(ctx, p, opts...)
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return c.Client.Publish(ctx, p, opts...)
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}
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}
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func (c *traceWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
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newCtx, s := c.trace.Start(ctx, req.Service()+"."+req.Endpoint())
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err := c.Client.Call(newCtx, req, rsp, opts...)
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if err != nil {
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s.Metadata["error"] = err.Error()
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}
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// finish the trace
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c.trace.Finish(s)
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return err
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}
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// FromService wraps a client to inject From-Service header into metadata
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// FromService wraps a client to inject From-Service header into metadata
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func FromService(name string, c client.Client) client.Client {
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func FromService(name string, c client.Client) client.Client {
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return &clientWrapper{
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return &clientWrapper{
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@ -73,3 +95,34 @@ func HandlerStats(stats stats.Stats) server.HandlerWrapper {
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}
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}
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}
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}
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}
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}
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// TraceCall is a call tracing wrapper
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func TraceCall(name string, t trace.Trace, c client.Client) client.Client {
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return &traceWrapper{
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name: name,
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trace: t,
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Client: c,
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}
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}
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// TraceHandler wraps a server handler to perform tracing
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func TraceHandler(t trace.Trace) server.HandlerWrapper {
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// return a handler wrapper
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return func(h server.HandlerFunc) server.HandlerFunc {
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// return a function that returns a function
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return func(ctx context.Context, req server.Request, rsp interface{}) error {
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// get the span
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newCtx, s := t.Start(ctx, req.Service()+"."+req.Endpoint())
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err := h(newCtx, req, rsp)
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if err != nil {
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s.Metadata["error"] = err.Error()
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}
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// finish
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t.Finish(s)
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return err
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}
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}
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}
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