DATACMNS-660 - Web configuration support now picks up configuration annotated with @SpringDataWebConfigurationMixing.

Introduced @SpringDataWebConfigurationMixing that can be used on configuration classes that are supposed to contribute components to the Application context when @EnableSpringDataWebSupport is used.

SpringDataWebConfigurationImportSelector scans the org.springframework.data package for classes annotated with that annotation and adds them to the classes to be considered config classes.

src/test/java/org/springframework/data/web/config/EnableSpringDataWebSupportIntegrationTests.java

@@ -172,6 +172,18 @@ public class EnableSpringDataWebSupportIntegrationTests {
 				andExpect(status().isOk());
 	}
 
+	/**
+	 * @see DATACMNS-660
+	 */
+	@Test
+	public void picksUpWebConfigurationMixins() {
+
+		ApplicationContext context = WebTestUtils.createApplicationContext(SampleConfig.class);
+		List<String> names = Arrays.asList(context.getBeanDefinitionNames());
+
+		assertThat(names, hasItem("sampleBean"));
+	}
+
 	@SuppressWarnings("unchecked")
 	private static void assertResolversRegistered(ApplicationContext context, Class<?>... resolverTypes) {
 

src/test/java/org/springframework/data/web/config/SampleMixin.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2015 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.web.config;
+
+import org.springframework.context.annotation.Bean;
+
+/**
+ * @author Oliver Gierke
+ */
+@SpringDataWebConfigurationMixin
+public class SampleMixin {
+
+	@Bean
+	String sampleBean() {
+		return "sampleBean";
+	}
+}