QoS anonymous access permission verification extension point.
org.apache.dubbo.qos.permission.PermissionChecker
Dubbo QoS dubbo.application.qos-anonymous-access-permission-level
anonymous access permission verification.
org.apache.dubbo.qos.permission.DefaultAnonymousAccessPermissionChecker
Maven project structure:
XxxPermissionChecker.java:
META-INF/dubbo/org.apache.dubbo.qos.permission.PermissionChecker: