From e0dc8272a522bf8ce5b53d78b6ef95bfdfebddca Mon Sep 17 00:00:00 2001
From: hhs <386998068@qq.com>
Date: Sun, 21 Jun 2026 21:59:43 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E5=AE=9E=E7=8E=B0=E5=B9=B6=E5=8F=91?=
 =?UTF-8?q?=E5=AE=89=E5=85=A8=E7=9A=84=20ULID=20trace=20ID=20=E7=94=9F?=
 =?UTF-8?q?=E6=88=90=E5=99=A8?=
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---
 backend/internal/trace/id.go | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 backend/internal/trace/id.go

diff --git a/backend/internal/trace/id.go b/backend/internal/trace/id.go
new file mode 100644
index 0000000..23d35f9
--- /dev/null
+++ b/backend/internal/trace/id.go
@@ -0,0 +1,22 @@
+package trace
+
+import (
+	cryptorand "crypto/rand"
+	"sync"
+	"time"
+
+	"github.com/oklog/ulid/v2"
+)
+
+var entropyPool = sync.Pool{
+	New: func() interface{} {
+		return ulid.Monotonic(cryptorand.Reader, 0)
+	},
+}
+
+// GenerateTraceID 生成并发安全的 ULID trace ID
+func GenerateTraceID() string {
+	entropy := entropyPool.Get().(*ulid.MonotonicEntropy)
+	defer entropyPool.Put(entropy)
+	return ulid.MustNew(ulid.Timestamp(time.Now()), entropy).String()
+}