trace wrapper

This commit is contained in:
Asim Aslam 2020-01-24 21:58:29 +00:00
parent a997a86e49
commit 4a6570a772

View File

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