@Override
    protected void buildAuditMessage(StringBuilder builder) {
      super.buildAuditMessage(builder);

      builder.append(", Role(")
        .append(role)
        .append(")");

      if (user != null) {
        builder.append(", User(").append(user).append(")");
      }
      if (group != null) {
        builder.append(", Group(").append(group).append(")");
      }
    }
Appends to the event the details of the incoming request.

@param builder builder for the audit event details.
ambari-server/src/main/java/org/apache/ambari/server/audit/event/request/PrivilegeChangeRequestAuditEvent.java