Added SPEL support; fixes gh-917

2018-04-05 16:36:59 +02:00
parent 13ff16e2a5
commit 76739a5b6b
3 changed files with 15 additions and 3 deletions
--- a/docs/src/main/asciidoc/spring-cloud-sleuth.adoc
+++ b/docs/src/main/asciidoc/spring-cloud-sleuth.adoc
@@ -710,6 +710,8 @@ The precedence is as follows:
 . If the bean name has not been provided, try to evaluate an expression.
 We search for a `TagValueExpressionResolver` bean.
 The default implementation uses SPEL expression resolution.
+**IMPORTANT** from Sleuth 2.0.0 you can only reference properties
+from the SPEL expression. Method execution is not allowed due to security constraints.
 . If we do not find any expression to evaluate, return the `toString()` value of the parameter.

 ==== Custom extractor