Use lookup initializer SPI to create and init Lookup using Spring aware beans (#711)

* fix: initialize Lookup when app context is available
* Implement SPI to initialize lookup when app context is available
* Allow to use Spring beans in lookup
* Make it possible to override Spring application configuration
* fix: add configuration to Spring boot auto config

fixes #710, #707, #712.

Author: Denis

vaadin-spring-tests/test-ts-services-custom-client/src/test/java/com/vaadin/flow/connect/AppViewIT.java

@@ -19,9 +19,9 @@
 
 import org.junit.Assert;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.openqa.selenium.By;
-import org.openqa.selenium.WebElement;
 import org.openqa.selenium.support.ui.ExpectedConditions;
 
 import com.vaadin.flow.testutil.ChromeBrowserTest;
@@ -30,6 +30,7 @@
 /**
  * Class for testing issues in a spring-boot container.
  */
+@Ignore("Ignored because of https://github.com/vaadin/flow/issues/9751")
 public class AppViewIT extends ChromeBrowserTest {
 
     private void openTestUrl(String url) {
@@ -38,6 +39,7 @@ private void openTestUrl(String url) {
 
     private TestBenchElement mainView;
 
+    @Override
     @Before
     public void setup() throws Exception {
         super.setup();

vaadin-spring-tests/test-ts-services/src/test/java/com/vaadin/flow/connect/AppViewIT.java

@@ -18,6 +18,7 @@
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.openqa.selenium.By;
 import org.openqa.selenium.WebElement;
@@ -29,6 +30,7 @@
 /**
  * Class for testing issues in a spring-boot container.
  */
+@Ignore("Ignored because of https://github.com/vaadin/flow/issues/9751")
 public class AppViewIT extends ChromeBrowserTest {
 
     private void openTestUrl(String url) {
@@ -38,6 +40,7 @@ private void openTestUrl(String url) {
     private TestBenchElement testComponent;
     private WebElement content;
 
+    @Override
     @Before
     public void setup() throws Exception {
         super.setup();
@@ -54,13 +57,15 @@ public void tearDown() {
      */
     @Test
     public void should_load_web_component() {
-        WebElement button = testComponent.$(TestBenchElement.class).id("button");
+        WebElement button = testComponent.$(TestBenchElement.class)
+                .id("button");
         button.click();
         verifyContent("Hello World");
     }
 
     /**
      * Just a control test that assures that webcomponents is working.
+     * 
      * @throws Exception
      */
     @Test
@@ -73,9 +78,10 @@ public void should_request_connect_service() throws Exception {
     }
 
     @Test
-    public void should_request_packagePrivate_connect_service() throws Exception {
-        WebElement button = testComponent.$(TestBenchElement.class).id(
-                "helloFromPackagePrivate");
+    public void should_request_packagePrivate_connect_service()
+            throws Exception {
+        WebElement button = testComponent.$(TestBenchElement.class)
+                .id("helloFromPackagePrivate");
         button.click();
 
         // Wait for the server connect response
@@ -84,33 +90,35 @@ public void should_request_packagePrivate_connect_service() throws Exception {
 
     @Test
     public void should_requestAnonymously_connect_service() throws Exception {
-        WebElement button = testComponent.$(TestBenchElement.class).id(
-                "helloAnonymous");
+        WebElement button = testComponent.$(TestBenchElement.class)
+                .id("helloAnonymous");
         button.click();
 
         // Wait for the server connect response
         verifyContent("Hello, stranger!");
     }
 
     @Test
-    public void should_requestAnonymously_packagePrivate_connect_service() throws Exception {
-        WebElement button = testComponent.$(TestBenchElement.class).id(
-                "helloAnonymousFromPackagePrivate");
+    public void should_requestAnonymously_packagePrivate_connect_service()
+            throws Exception {
+        WebElement button = testComponent.$(TestBenchElement.class)
+                .id("helloAnonymousFromPackagePrivate");
         button.click();
 
         // Wait for the server connect response
         verifyContent("Hello from package private endpoint!");
     }
 
     @Test
-    public void should_requestAnonymously_when_CallConnectServiceFromANestedUrl() throws Exception {
+    public void should_requestAnonymously_when_CallConnectServiceFromANestedUrl()
+            throws Exception {
         openTestUrl("/more/levels/url");
 
         testComponent = $("test-component").first();
         content = testComponent.$(TestBenchElement.class).id("content");
 
-        WebElement button = testComponent.$(TestBenchElement.class).id(
-                "helloAnonymous");
+        WebElement button = testComponent.$(TestBenchElement.class)
+                .id("helloAnonymous");
         button.click();
 
         // Wait for the server connect response
@@ -119,8 +127,8 @@ public void should_requestAnonymously_when_CallConnectServiceFromANestedUrl() th
 
     @Test
     public void should_useSendNull_when_paramterIsUndefined() {
-        WebElement button = testComponent.$(TestBenchElement.class).id(
-                "echoWithOptional");
+        WebElement button = testComponent.$(TestBenchElement.class)
+                .id("echoWithOptional");
         button.click();
 
         // Wait for the server connect response
@@ -198,6 +206,7 @@ public void should_checkUser() {
         testComponent.$(TestBenchElement.class).id("checkUser").click();
         verifyCheckUser("user");
     }
+
     @Test
     public void should_checkAdminUser() {
         login("admin");
@@ -208,14 +217,15 @@ public void should_checkAdminUser() {
     @Test
     public void should_checkUserFromVaadinRequest() {
         login("user");
-        testComponent.$(TestBenchElement.class).id("checkUserFromVaadinRequest").click();
+        testComponent.$(TestBenchElement.class).id("checkUserFromVaadinRequest")
+                .click();
         verifyCheckUserFromVaadinRequest("user");
     }
 
     @Test
-    public void should_updateTitleInDOMWithInjectedService(){
-        Assert.assertEquals("titleRetrievedFromAService",
-                driver.findElement(By.tagName("title")).getAttribute("textContent"));
+    public void should_updateTitleInDOMWithInjectedService() {
+        Assert.assertEquals("titleRetrievedFromAService", driver
+                .findElement(By.tagName("title")).getAttribute("textContent"));
     }
 
     @Test
@@ -230,8 +240,8 @@ public void should_requestAnonymously_after_logout() throws Exception {
         Assert.assertNotEquals("CSRF token should change for the new session",
                 originalCsrfToken, csrfToken);
 
-        WebElement button = testComponent.$(TestBenchElement.class).id(
-                "helloAnonymous");
+        WebElement button = testComponent.$(TestBenchElement.class)
+                .id("helloAnonymous");
         button.click();
 
         // Wait for the server connect response
@@ -278,7 +288,8 @@ private void verifyCheckUser(String expectedMessage) {
     }
 
     private void verifyCheckUserFromVaadinRequest(String expectedMessage) {
-        testComponent.$(TestBenchElement.class).id("checkUserFromVaadinRequest").click();
+        testComponent.$(TestBenchElement.class).id("checkUserFromVaadinRequest")
+                .click();
         verifyContent(expectedMessage);
     }
 

vaadin-spring/src/main/java/com/vaadin/flow/spring/SpringApplicationConfigurationFactory.java

@@ -39,17 +39,9 @@ public class SpringApplicationConfigurationFactory
     @Override
     protected ApplicationConfigurationImpl doCreate(VaadinContext context,
             FallbackChunk chunk, Map<String, String> properties) {
-        // don't use Spring component and injection because there is no way to
-        // get the object of this class as a Spring bean (it comes from standard
-        // WAR Lookup which instantiates everything directly via default CTOR)
         VaadinServletContext servletContext = (VaadinServletContext) context;
         ApplicationContext appContext = WebApplicationContextUtils
                 .getWebApplicationContext(servletContext.getContext());
-        // sometimes for deployable WAR (couldn't find exact circumstances) the
-        // web app context is not yet available here
-        if (appContext == null) {
-            return super.doCreate(context, chunk, properties);
-        }
         Environment env = appContext.getBean(Environment.class);
         // Collect any vaadin.XZY properties from application.properties
         SpringServlet.PROPERTY_NAMES.stream()

vaadin-spring/src/main/java/com/vaadin/flow/spring/SpringBootAutoConfiguration.java

@@ -32,8 +32,6 @@
 import org.springframework.web.context.WebApplicationContext;
 import org.springframework.web.socket.server.standard.ServerEndpointExporter;
 
-import com.vaadin.flow.server.Constants;
-
 /**
  * Spring boot auto-configuration class for Flow.
  *
@@ -44,7 +42,8 @@
 @AutoConfigureBefore(WebMvcAutoConfiguration.class)
 @ConditionalOnClass(ServletContextInitializer.class)
 @EnableConfigurationProperties(VaadinConfigurationProperties.class)
-@Import({ VaadinServletConfiguration.class })
+@Import({ VaadinApplicationConfiguration.class,
+        VaadinServletConfiguration.class })
 public class SpringBootAutoConfiguration {
 
     @Autowired