Merge pull request #310 from aleksandr-m/feature/WW-4998_i18ninterceptor

WW-4998 I18nInterceptor's default storage should store locale
diff --git a/core/src/main/java/org/apache/struts2/interceptor/I18nInterceptor.java b/core/src/main/java/org/apache/struts2/interceptor/I18nInterceptor.java
index 682bbe6..4ddcedf 100644
--- a/core/src/main/java/org/apache/struts2/interceptor/I18nInterceptor.java
+++ b/core/src/main/java/org/apache/struts2/interceptor/I18nInterceptor.java
@@ -261,6 +261,7 @@
             super(invocation);
         }
 
+        @Override
         public Locale find() {
             Locale requestOnlyLocale = super.find();
 
@@ -281,15 +282,13 @@
 
         @Override
         public Locale store(ActionInvocation invocation, Locale locale) {
-            HttpSession session = ServletActionContext.getRequest().getSession(false);
+            Map<String, Object> session = invocation.getInvocationContext().getSession();
 
             if (session != null) {
-                String sessionId = session.getId();
+                String sessionId = ServletActionContext.getRequest().getSession().getId();
                 synchronized (sessionId.intern()) {
-                    invocation.getInvocationContext().getSession().put(attributeName, locale);
+                    session.put(attributeName, locale);
                 }
-            } else {
-                LOG.debug("session creation avoided as it doesn't exist already");
             }
 
             return locale;
diff --git a/core/src/test/java/org/apache/struts2/interceptor/I18nInterceptorTest.java b/core/src/test/java/org/apache/struts2/interceptor/I18nInterceptorTest.java
index fcc0dd1..da5607f 100644
--- a/core/src/test/java/org/apache/struts2/interceptor/I18nInterceptorTest.java
+++ b/core/src/test/java/org/apache/struts2/interceptor/I18nInterceptorTest.java
@@ -79,8 +79,8 @@
 
         assertFalse("should have been removed",
                 mai.getInvocationContext().getParameters().get(I18nInterceptor.DEFAULT_PARAMETER).isDefined());
-        assertNull("should not be created", request.getSession(false));
-        assertNull("should not be stored here", session.get(I18nInterceptor.DEFAULT_SESSION_ATTRIBUTE));
+        assertNotNull("should be created", request.getSession(false));
+        assertNotNull("should be stored here", session.get(I18nInterceptor.DEFAULT_SESSION_ATTRIBUTE));
     }
 
     public void testDefaultLocale() throws Exception {