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