diff --git a/src/main/java/com/eactive/eai/adapter/http/dynamic/filter/HttpAdapterFilter.java b/src/main/java/com/eactive/eai/adapter/http/dynamic/filter/HttpAdapterFilter.java
index 600ed1a..b0f4522 100644
--- a/src/main/java/com/eactive/eai/adapter/http/dynamic/filter/HttpAdapterFilter.java
+++ b/src/main/java/com/eactive/eai/adapter/http/dynamic/filter/HttpAdapterFilter.java
@@ -7,6 +7,9 @@ import javax.servlet.http.HttpServletResponse;
 
 public interface HttpAdapterFilter {
 
+	public static final String ERROR_PRE_FAIL = "E.PREFILTER_FAIL";
+	public static final String ERROR_POST_FAIL = "E.POSTFILTER_FAIL";
+	
 	public Object doPreFilter(String adptGrpName, String adptName, Object message, Properties prop,
 			HttpServletRequest request, HttpServletResponse response) throws Exception;