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package tracing
import (
"context"
"strings"
"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
"google.golang.org/grpc/stats"
)
func ServerStatsHandler(opts ...otelgrpc.Option) stats.Handler {
handler := otelgrpc.NewServerHandler(opts...)
return &statsFilter{
inner: handler,
filter: defaultStatsFilter,
}
}
func ClientStatsHandler(opts ...otelgrpc.Option) stats.Handler {
handler := otelgrpc.NewClientHandler(opts...)
return &statsFilter{
inner: handler,
filter: defaultStatsFilter,
}
}
type contextKey int
const filterContextKey contextKey = iota
type statsFilter struct {
inner stats.Handler
filter func(info *stats.RPCTagInfo) bool
}
func (s *statsFilter) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
if s.filter(info) {
return context.WithValue(ctx, filterContextKey, struct{}{})
}
return s.inner.TagRPC(ctx, info)
}
func (s *statsFilter) HandleRPC(ctx context.Context, rpcStats stats.RPCStats) {
if ctx.Value(filterContextKey) != nil {
return
}
s.inner.HandleRPC(ctx, rpcStats)
}
func (s *statsFilter) TagConn(ctx context.Context, info *stats.ConnTagInfo) context.Context {
return s.inner.TagConn(ctx, info)
}
func (s *statsFilter) HandleConn(ctx context.Context, connStats stats.ConnStats) {
s.inner.HandleConn(ctx, connStats)
}
func defaultStatsFilter(info *stats.RPCTagInfo) bool {
return strings.HasSuffix(info.FullMethodName, "opentelemetry.proto.collector.trace.v1.TraceService/Export") ||
strings.HasSuffix(info.FullMethodName, "Health/Check")
}
|
