forked from smallnest/rpcx
/
opencensus.go
64 lines (50 loc) ยท 1.96 KB
/
opencensus.go
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package serverplugin
import (
"context"
"net"
"github.com/fitlivingmm/rpcx/protocol"
"github.com/fitlivingmm/rpcx/server"
"github.com/fitlivingmm/rpcx/share"
"go.opencensus.io/trace"
)
type OpenCensusPlugin struct{}
func (p OpenCensusPlugin) Register(name string, rcvr interface{}, metadata string) error {
_, span := trace.StartSpan(context.Background(), "rpcx.Register")
defer span.End()
span.AddAttributes(trace.StringAttribute("register_service", name))
return nil
}
func (p OpenCensusPlugin) RegisterFunction(serviceName, fname string, fn interface{}, metadata string) error {
_, span := trace.StartSpan(context.Background(), "rpcx.RegisterFunction")
defer span.End()
span.AddAttributes(trace.StringAttribute("register_function", serviceName+"."+fname))
return nil
}
func (p OpenCensusPlugin) PostConnAccept(conn net.Conn) (net.Conn, bool) {
_, span := trace.StartSpan(context.Background(), "rpcx.AcceptConn")
defer span.End()
span.AddAttributes(trace.StringAttribute("remote_addr", conn.RemoteAddr().String()))
return conn, true
}
func (p OpenCensusPlugin) PreHandleRequest(ctx context.Context, r *protocol.Message) error {
parentContext, err := share.GetOpencensusSpanContextFromContext(ctx)
if err != nil || parentContext == nil {
return err
}
_, span1 := trace.StartSpanWithRemoteParent(ctx, "rpcx.service."+r.ServicePath+"."+r.ServiceMethod, *parentContext)
clientConn := ctx.Value(server.RemoteConnContextKey).(net.Conn)
span1.AddAttributes(trace.StringAttribute("remote_addr", clientConn.RemoteAddr().String()))
if rpcxContext, ok := ctx.(*share.Context); ok {
rpcxContext.SetValue(share.OpencensusSpanServerKey, span1)
}
return nil
}
func (p OpenCensusPlugin) PostWriteResponse(ctx context.Context, req *protocol.Message, res *protocol.Message, err error) error {
if rpcxContext, ok := ctx.(*share.Context); ok {
span1 := rpcxContext.Value(share.OpencensusSpanServerKey)
if span1 != nil {
span1.(*trace.Span).End()
}
}
return nil
}