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7069369e03
1. Add a OpenTelemetry-like shim-layer to collect traces 2. Add a simple builtin trace collector and exporter, end users could download the diagnosis report to get the traces. This PR's design is quite lightweight, no hard-dependency, and it is easy to improve or remove. We can try it on gitea.com first to see whether it works well, and fine tune the details. --------- Co-authored-by: silverwind <me@silverwind.io>
94 lines
2.3 KiB
Go
94 lines
2.3 KiB
Go
// Copyright 2025 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package gtprof
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import (
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"context"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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// "vendor span" is a simple demo for a span from a vendor library
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var vendorContextKey any = "vendorContextKey"
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type vendorSpan struct {
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name string
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children []*vendorSpan
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}
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func vendorTraceStart(ctx context.Context, name string) (context.Context, *vendorSpan) {
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span := &vendorSpan{name: name}
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parentSpan, ok := ctx.Value(vendorContextKey).(*vendorSpan)
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if ok {
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parentSpan.children = append(parentSpan.children, span)
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}
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ctx = context.WithValue(ctx, vendorContextKey, span)
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return ctx, span
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}
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// below "testTrace*" integrate the vendor span into our trace system
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type testTraceSpan struct {
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vendorSpan *vendorSpan
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}
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func (t *testTraceSpan) addEvent(name string, cfg *EventConfig) {}
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func (t *testTraceSpan) recordError(err error, cfg *EventConfig) {}
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func (t *testTraceSpan) end() {}
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type testTraceStarter struct{}
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func (t *testTraceStarter) start(ctx context.Context, traceSpan *TraceSpan, internalSpanIdx int) (context.Context, traceSpanInternal) {
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ctx, span := vendorTraceStart(ctx, traceSpan.name)
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return ctx, &testTraceSpan{span}
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}
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func TestTraceStarter(t *testing.T) {
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globalTraceStarters = []traceStarter{&testTraceStarter{}}
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ctx := context.Background()
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ctx, span := GetTracer().Start(ctx, "root")
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defer span.End()
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func(ctx context.Context) {
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ctx, span := GetTracer().Start(ctx, "span1")
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defer span.End()
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func(ctx context.Context) {
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_, span := GetTracer().Start(ctx, "spanA")
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defer span.End()
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}(ctx)
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func(ctx context.Context) {
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_, span := GetTracer().Start(ctx, "spanB")
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defer span.End()
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}(ctx)
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}(ctx)
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func(ctx context.Context) {
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_, span := GetTracer().Start(ctx, "span2")
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defer span.End()
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}(ctx)
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var spanFullNames []string
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var collectSpanNames func(parentFullName string, s *vendorSpan)
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collectSpanNames = func(parentFullName string, s *vendorSpan) {
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fullName := parentFullName + "/" + s.name
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spanFullNames = append(spanFullNames, fullName)
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for _, c := range s.children {
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collectSpanNames(fullName, c)
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}
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}
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collectSpanNames("", span.internalSpans[0].(*testTraceSpan).vendorSpan)
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assert.Equal(t, []string{
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"/root",
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"/root/span1",
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"/root/span1/spanA",
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"/root/span1/spanB",
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"/root/span2",
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}, spanFullNames)
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}
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