@service and @reference Optimization (#2657)

* Polish #2235 #2251 apache/dubbo-spring-boot-project#243

* Fixed bugs and optimized imports

dependencies-bom/pom.xml

@@ -112,6 +112,7 @@
         <jaxb_version>2.2.7</jaxb_version>
         <activation_version>1.2.0</activation_version>
         <hessian_lite_version>3.2.4</hessian_lite_version>
+        <alibaba_spring_context_support_version>1.0.1</alibaba_spring_context_support_version>
     </properties>
 
     <dependencyManagement>
@@ -358,6 +359,16 @@
                 <artifactId>hessian-lite</artifactId>
                 <version>${hessian_lite_version}</version>
             </dependency>
+
+            <!-- Alibaba extensions -->
+
+            <!-- Spring Context Support -->
+            <dependency>
+                <groupId>com.alibaba.spring</groupId>
+                <artifactId>spring-context-support</artifactId>
+                <version>${alibaba_spring_context_support_version}</version>
+            </dependency>
+
             <!-- Test lib -->
             <dependency>
                 <groupId>org.apache.curator</groupId>

dubbo-config/dubbo-config-spring/pom.xml

@@ -14,7 +14,8 @@
   See the License for the specific language governing permissions and
   limitations under the License.
   -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>com.alibaba</groupId>
@@ -51,6 +52,10 @@
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
         </dependency>
+        <dependency>
+            <groupId>com.alibaba.spring</groupId>
+            <artifactId>spring-context-support</artifactId>
+        </dependency>
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>

dubbo-config/dubbo-config-spring/src/main/java/com/alibaba/dubbo/config/spring/ServiceBean.java

@@ -24,14 +24,18 @@
 import com.alibaba.dubbo.config.RegistryConfig;
 import com.alibaba.dubbo.config.ServiceConfig;
 import com.alibaba.dubbo.config.annotation.Service;
+import com.alibaba.dubbo.config.spring.context.event.ServiceBeanExportedEvent;
 import com.alibaba.dubbo.config.spring.extension.SpringExtensionFactory;
+
 import org.springframework.aop.support.AopUtils;
 import org.springframework.beans.factory.BeanFactoryUtils;
 import org.springframework.beans.factory.BeanNameAware;
 import org.springframework.beans.factory.DisposableBean;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.context.ApplicationEventPublisherAware;
 import org.springframework.context.ApplicationListener;
 import org.springframework.context.event.ContextRefreshedEvent;
 import org.springframework.context.support.AbstractApplicationContext;
@@ -46,7 +50,9 @@
  *
  * @export
  */
-public class ServiceBean<T> extends ServiceConfig<T> implements InitializingBean, DisposableBean, ApplicationContextAware, ApplicationListener<ContextRefreshedEvent>, BeanNameAware {
+public class ServiceBean<T> extends ServiceConfig<T> implements InitializingBean, DisposableBean,
+        ApplicationContextAware, ApplicationListener<ContextRefreshedEvent>, BeanNameAware,
+        ApplicationEventPublisherAware {
 
     private static final long serialVersionUID = 213195494150089726L;
 
@@ -60,6 +66,8 @@ public class ServiceBean<T> extends ServiceConfig<T> implements InitializingBean
 
     private transient boolean supportedApplicationListener;
 
+    private ApplicationEventPublisher applicationEventPublisher;
+
     public ServiceBean() {
         super();
         this.service = null;
@@ -265,6 +273,34 @@ && getInterface() != null && getInterface().length() > 0
         }
     }
 
+    /**
+     * Get the name of {@link ServiceBean}
+     *
+     * @return {@link ServiceBean}'s name
+     * @since 2.6.5
+     */
+    public String getBeanName() {
+        return this.beanName;
+    }
+
+    /**
+     * @since 2.6.5
+     */
+    @Override
+    public void export() {
+        super.export();
+        // Publish ServiceBeanExportedEvent
+        publishExportEvent();
+    }
+
+    /**
+     * @since 2.6.5
+     */
+    private void publishExportEvent() {
+        ServiceBeanExportedEvent exportEvent = new ServiceBeanExportedEvent(this);
+        applicationEventPublisher.publishEvent(exportEvent);
+    }
+
     @Override
     public void destroy() throws Exception {
         // This will only be called for singleton scope bean, and expected to be called by spring shutdown hook when BeanFactory/ApplicationContext destroys.
@@ -280,4 +316,13 @@ protected Class getServiceClass(T ref) {
         }
         return super.getServiceClass(ref);
     }
+
+    /**
+     * @param applicationEventPublisher
+     * @since 2.6.5
+     */
+    @Override
+    public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
+        this.applicationEventPublisher = applicationEventPublisher;
+    }
 }

dubbo-config/dubbo-config-spring/src/main/java/com/alibaba/dubbo/config/spring/beans/factory/annotation/AbstractAnnotationConfigBeanBuilder.java

@@ -21,6 +21,7 @@
 import com.alibaba.dubbo.config.ModuleConfig;
 import com.alibaba.dubbo.config.MonitorConfig;
 import com.alibaba.dubbo.config.RegistryConfig;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.context.ApplicationContext;
@@ -34,6 +35,7 @@
 
 /**
  * Abstract Configurable {@link Annotation} Bean Builder
+ *
  * @since 2.5.7
  */
 abstract class AbstractAnnotationConfigBeanBuilder<A extends Annotation, B extends AbstractInterfaceConfig> {
@@ -76,7 +78,7 @@ public final B build() throws Exception {
         configureBean(bean);
 
         if (logger.isInfoEnabled()) {
-            logger.info(bean + " has been built.");
+            logger.info("The bean[type:" + bean.getClass().getSimpleName() + "] has been built.");
         }
 
         return bean;