feat: Mention vaadin.whitelisted-packages as a possible cause of miss…

…ing template file (#12310) * Mention vaadin.whitelisted-packages as a possible cause of missing template file * Fix formatting
vaadin · Nov 9, 2021 · 5a40c0e · 5a40c0e
1 parent e4e6771
commit 5a40c0e
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Showing 2 changed files with 15 additions and 10 deletions.
diff --git a/...e/src/main/java/com/vaadin/flow/component/littemplate/internal/LitTemplateParserImpl.java b/...e/src/main/java/com/vaadin/flow/component/littemplate/internal/LitTemplateParserImpl.java
@@ -133,11 +133,14 @@ public TemplateData getTemplateContent(Class<? extends LitTemplate> clazz,
         getLogger().info("Couldn't find the "
                 + "definition of the element with tag '{}' "
                 + "in any lit template file declared using '@{}' annotations. "
-                + "Check the availability of the template files in your WAR "
-                + "file or provide alternative implementation of the "
-                + "method LitTemplateParser.getTemplateContent() which should return an element "
-                + "representing the content of the template file", tag,
-                JsModule.class.getSimpleName());
+                + "In a Spring Boot project, please ensure that the template's "
+                + "groupId is added to the vaadin.whitelisted-packages "
+                + "property. Otherwise, please Check the availability of the "
+                + "template files in your WAR file or provide alternative "
+                + "implementation of the method "
+                + "LitTemplateParser.getTemplateContent() which should return "
+                + "an element representing the content of the template file",
+                tag, JsModule.class.getSimpleName());
 
         return null;
     }

diff --git a/...r-template/src/main/java/com/vaadin/flow/component/polymertemplate/NpmTemplateParser.java b/...r-template/src/main/java/com/vaadin/flow/component/polymertemplate/NpmTemplateParser.java
@@ -139,11 +139,13 @@ public TemplateData getTemplateContent(
         throw new IllegalStateException(String.format("Couldn't find the "
                 + "definition of the element with tag '%s' "
                 + "in any template file declared using '@%s' annotations. "
-                + "Check the availability of the template files in your WAR "
-                + "file or provide alternative implementation of the "
-                + "method getTemplateContent() which should return an element "
-                + "representing the content of the template file", tag,
-                JsModule.class.getSimpleName()));
+                + "In a Spring Boot project, please ensure that the template's "
+                + "groupId is added to the vaadin.whitelisted-packages "
+                + "property. Otherwise, please Check the availability of the "
+                + "template files in your WAR file or provide alternative "
+                + "implementation of the method getTemplateContent() which "
+                + "should return an element representing the content of the "
+                + "template file", tag, JsModule.class.getSimpleName()));
     }
 
     /**