Adding PortalResourceLoader

modules/core/portal-common-cdi/src/main/java/de/cuioss/portal/common/util/PortalResourceLoader.java

@@ -0,0 +1,42 @@
+/**
+ *
+ */
+package de.cuioss.portal.common.util;
+
+import static de.cuioss.tools.collect.MoreCollections.requireNotEmpty;
+import static java.util.Objects.requireNonNull;
+
+import java.net.URL;
+import java.util.Optional;
+
+import de.cuioss.tools.logging.CuiLogger;
+import lombok.experimental.UtilityClass;
+
+/**
+ * Helper class that streamlines loading Resources from the classpath. This is
+ * needed because Quarkus modules behave differently.
+ */
+@UtilityClass
+public class PortalResourceLoader {
+
+    private static final CuiLogger LOGGER = new CuiLogger(PortalResourceLoader.class);
+
+    /**
+     * Loads a certain resource
+     *
+     * @param resourcePath identifying the concrete resource, must nor be null
+     * @param callingClass must not be null
+     * @return The {@link Optional} {@link URL} identifying the resource
+     */
+    public static Optional<URL> getRessource(String resourcePath, Class<?> callingClass) {
+        requireNotEmpty(resourcePath);
+        requireNonNull(callingClass);
+        var result = Optional.ofNullable(callingClass.getResource(resourcePath));
+        if (result.isEmpty()) {
+            LOGGER.debug("Simple class loading for resource '%s' and type '%s' did not work, using context-classloader",
+                    resourcePath, callingClass);
+            result = Optional.ofNullable(Thread.currentThread().getContextClassLoader().getResource(resourcePath));
+        }
+        return result;
+    }
+}

modules/core/portal-common-cdi/src/test/java/de/cuioss/portal/common/util/PortalResourceLoaderTest.java

@@ -0,0 +1,20 @@
+package de.cuioss.portal.common.util;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+class PortalResourceLoaderTest {
+
+    @Test
+    void shouldLoadExisitingResource() {
+        assertTrue(PortalResourceLoader.getRessource("/de/cuioss/portal/l18n/messages/high1.properties", getClass())
+                .isPresent());
+    }
+
+    @Test
+    void shouldHAndleNotExisitingResource() {
+        assertTrue(PortalResourceLoader.getRessource("/not/ther", getClass()).isEmpty());
+    }
+
+}