Rename PromiseRequestIdFilter, extract isWrapNeeded and incomingRequestId methods

Change-Id: Idb39f7d5e723598e34e737522c4f73d8de3df93c
Issue-ID: VID-253
Signed-off-by: Ittay Stern <ittay.stern@att.com>

1 files changed, 30 insertions, 22 deletions

diff --git a/vid-app-common/src/main/java/org/onap/vid/controller/filter/PromiseEcompRequestIdFilter.java b/vid-app-common/src/main/java/org/onap/vid/controller/filter/PromiseRequestIdFilter.java
index 37622a215..c6b18785a 100644
--- a/vid-app-common/src/main/java/org/onap/vid/controller/filter/PromiseEcompRequestIdFilter.java
+++ b/vid-app-common/src/main/java/org/onap/vid/controller/filter/PromiseRequestIdFilter.java
@@ -21,10 +21,14 @@
 package org.onap.vid.controller.filter;
 
 
-import com.google.common.collect.ImmutableList;
-import org.apache.commons.lang3.StringUtils;
-import org.springframework.web.filter.GenericFilterBean;
+import static org.onap.portalsdk.core.util.SystemProperties.ECOMP_REQUEST_ID;
 
+import com.google.common.collect.ImmutableList;
+import java.io.IOException;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.UUID;
+import java.util.regex.Pattern;
 import javax.servlet.FilterChain;
 import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
@@ -33,18 +37,15 @@ import javax.servlet.annotation.WebFilter;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletRequestWrapper;
 import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.util.Collections;
-import java.util.Enumeration;
-import java.util.UUID;
-
-import static org.onap.portalsdk.core.util.SystemProperties.ECOMP_REQUEST_ID;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.web.filter.GenericFilterBean;
 
 @WebFilter(urlPatterns = "/*")
-public class PromiseEcompRequestIdFilter extends GenericFilterBean {
+public class PromiseRequestIdFilter extends GenericFilterBean {
 
     private static final String REQUEST_ID_RESPONSE_HEADER = ECOMP_REQUEST_ID + "-echo";
 
+    private static final Pattern uuidRegex = Pattern.compile("[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}");
 
     @Override
     public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
@@ -62,28 +63,35 @@ public class PromiseEcompRequestIdFilter extends GenericFilterBean {
         chain.doFilter(request, response);
     }
 
-    public static ServletRequest wrapIfNeeded(ServletRequest request) {
+    public ServletRequest wrapIfNeeded(ServletRequest request) {
         final HttpServletRequest httpRequest = (HttpServletRequest) request;
-        final String originalRequestId = httpRequest.getHeader(ECOMP_REQUEST_ID);
+        final String originalRequestId = incomingRequestId(httpRequest);
 
-        if (StringUtils.isEmpty(originalRequestId) || !verifyAndValidateUuid(originalRequestId)) {
-            request = new PromiseEcompRequestIdRequestWrapper(httpRequest);
+        if (isWrapNeeded(originalRequestId)) {
+            request = new PromiseRequestIdRequestWrapper(httpRequest);
         }
 
         return request;
     }
 
-    public static boolean verifyAndValidateUuid(String value)
-    {
-        String uuidRegex = "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}";
-        return value.matches(uuidRegex);
+    private boolean verifyAndValidateUuid(String value) {
+        return uuidRegex.matcher(value).matches();
     }
 
-    private static class PromiseEcompRequestIdRequestWrapper extends HttpServletRequestWrapper {
+    protected boolean isWrapNeeded(String originalRequestId) {
+        return StringUtils.isEmpty(originalRequestId)
+            || !verifyAndValidateUuid(originalRequestId);
+    }
+
+    protected String incomingRequestId(HttpServletRequest httpRequest) {
+        return httpRequest.getHeader(ECOMP_REQUEST_ID);
+    }
+
+    private static class PromiseRequestIdRequestWrapper extends HttpServletRequestWrapper {
 
         private final UUID requestId;
 
-        PromiseEcompRequestIdRequestWrapper(HttpServletRequest request) {
+        PromiseRequestIdRequestWrapper(HttpServletRequest request) {
             super(request);
             requestId = UUID.randomUUID();
         }
@@ -107,11 +115,11 @@ public class PromiseEcompRequestIdFilter extends GenericFilterBean {
         public Enumeration<String> getHeaderNames() {
 
             if (null == super.getHeader(ECOMP_REQUEST_ID)) {
-            return Collections.enumeration(ImmutableList.<String>builder()
+                return Collections.enumeration(ImmutableList.<String>builder()
                     .add(ECOMP_REQUEST_ID)
                     .addAll(Collections.list(super.getHeaderNames()))
                     .build());
-        }
+            }
 
             return super.getHeaderNames();
         }