BAEL-1749 Spring @Order

* A new rest controller has been added to demonstrate the real-time event
streaming using Spring WebFlux

* delete

* Delete WebfluxController.java

* BAEL-658 (#4150)

* Review changes

* BAEL-1749 Test name change

spring-all/src/main/java/org/baeldung/order/Average.java

@@ -0,0 +1,15 @@
+package org.baeldung.order;
+
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+
+@Component
+@Order(Ordered.LOWEST_PRECEDENCE)
+public class Average implements Rating {
+
+    @Override
+    public int getRating() {
+        return 3;
+    }
+}

spring-all/src/main/java/org/baeldung/order/Excellent.java

@@ -0,0 +1,14 @@
+package org.baeldung.order;
+
+import org.springframework.stereotype.Component;
+import org.springframework.core.annotation.Order;
+
+@Component
+@Order(1)
+public class Excellent implements Rating {
+
+    @Override
+    public int getRating() {
+        return 1;
+    }
+}

spring-all/src/main/java/org/baeldung/order/Good.java

@@ -0,0 +1,14 @@
+package org.baeldung.order;
+
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+
+@Component
+@Order(2)
+public class Good implements Rating {
+
+    @Override
+    public int getRating() {
+        return 2;
+    }
+}

spring-all/src/main/java/org/baeldung/order/Rating.java

@@ -0,0 +1,6 @@
+package org.baeldung.order;
+
+public interface Rating {
+    
+    int getRating();
+}

spring-all/src/test/java/org/baeldung/order/RatingRetrieverUnitTest.java

@@ -0,0 +1,37 @@
+package org.baeldung.order;
+
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(loader = AnnotationConfigContextLoader.class)
+public class RatingRetrieverUnitTest {
+    
+    @Configuration 
+    @ComponentScan(basePackages = {"org.baeldung.order"}) 
+    static class ContextConfiguration {} 
+    
+    @Autowired
+    private List<Rating> ratings;
+    
+    @Test
+    public void givenOrderOnComponents_whenInjected_thenAutowireByOrderValue() {
+        assertThat(ratings.get(0).getRating(), is(equalTo(1)));
+        assertThat(ratings.get(1).getRating(), is(equalTo(2)));
+        assertThat(ratings.get(2).getRating(), is(equalTo(3)));
+    }
+
+}