优化

common-web/src/main/java/com/baiyue/common/web/TraceParent.java

@@ -3,6 +3,7 @@ package com.baiyue.common.web;
 import java.security.SecureRandom;
 import java.util.HexFormat;
 import java.util.Optional;
+import java.util.Locale;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -63,6 +64,24 @@ public record TraceParent(String traceId, String parentId, String traceFlags) {
         return new TraceParent(currentTraceId.toLowerCase(java.util.Locale.ROOT), randomNonZero(8), "01");
     }
 
+    /**
+     * Normalizes a trace ID from a trusted persisted/internal context.
+     *
+     * <p>Unlike an untrusted HTTP header, a canonical UUID is accepted and compacted because
+     * existing event envelopes historically persisted UUID trace IDs.</p>
+     */
+    public static Optional<String> normalizeTrustedTraceId(String value) {
+        if (validLegacyTraceId(value)) {
+            return Optional.of(value.toLowerCase(Locale.ROOT));
+        }
+        if (value != null && value.matches(
+                "[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}")) {
+            String compact = value.replace("-", "").toLowerCase(Locale.ROOT);
+            return validLegacyTraceId(compact) ? Optional.of(compact) : Optional.empty();
+        }
+        return Optional.empty();
+    }
+
     public static boolean validLegacyTraceId(String value) {
         return value != null && LEGACY_TRACE_ID.matcher(value).matches()
                 && !ZERO_TRACE_ID.equalsIgnoreCase(value);