Merge pull request apache#1837, spring spi support inject by type.

Author: chickenlj

dubbo-config/dubbo-config-spring/src/main/java/com/alibaba/dubbo/config/spring/extension/SpringExtensionFactory.java

@@ -17,7 +17,12 @@
 package com.alibaba.dubbo.config.spring.extension;
 
 import com.alibaba.dubbo.common.extension.ExtensionFactory;
+import com.alibaba.dubbo.common.logger.Logger;
+import com.alibaba.dubbo.common.logger.LoggerFactory;
 import com.alibaba.dubbo.common.utils.ConcurrentHashSet;
+
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
 import org.springframework.context.ApplicationContext;
 
 import java.util.Set;
@@ -26,6 +31,7 @@
  * SpringExtensionFactory
  */
 public class SpringExtensionFactory implements ExtensionFactory {
+    private static final Logger logger = LoggerFactory.getLogger(SpringExtensionFactory.class);
 
     private static final Set<ApplicationContext> contexts = new ConcurrentHashSet<ApplicationContext>();
 
@@ -37,6 +43,11 @@ public static void removeApplicationContext(ApplicationContext context) {
         contexts.remove(context);
     }
 
+    // currently for test purpose
+    public static void clearContexts() {
+        contexts.clear();
+    }
+
     @Override
     @SuppressWarnings("unchecked")
     public <T> T getExtension(Class<T> type, String name) {
@@ -48,6 +59,23 @@ public <T> T getExtension(Class<T> type, String name) {
                 }
             }
         }
+
+        logger.warn("No spring extension(bean) named:" + name + ", try to find an extension(bean) of type " + type.getName());
+
+        for (ApplicationContext context : contexts) {
+            try {
+                return context.getBean(type);
+            } catch (NoUniqueBeanDefinitionException multiBeanExe) {
+                throw multiBeanExe;
+            } catch (NoSuchBeanDefinitionException noBeanExe) {
+                if (logger.isDebugEnabled()) {
+                    logger.debug("Error when get spring extension(bean) for type:" + type.getName(), noBeanExe);
+                }
+            }
+        }
+
+        logger.warn("No spring extension(bean) named:" + name + ", type:" + type.getName() + " found, stop get bean.");
+
         return null;
     }
 

dubbo-config/dubbo-config-spring/src/test/java/com/alibaba/dubbo/config/spring/extension/BeanForContext2.java

@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 com.alibaba.dubbo.config.spring.extension;
+
+import com.alibaba.dubbo.config.spring.api.DemoService;
+import com.alibaba.dubbo.config.spring.impl.DemoServiceImpl;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class BeanForContext2 {
+    @Bean("bean1")
+    public DemoService context2Bean() {
+        return new DemoServiceImpl();
+    }
+}

dubbo-config/dubbo-config-spring/src/test/java/com/alibaba/dubbo/config/spring/extension/SpringExtensionFactoryTest.java

@@ -0,0 +1,95 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 com.alibaba.dubbo.config.spring.extension;
+
+import com.alibaba.dubbo.config.spring.api.DemoService;
+import com.alibaba.dubbo.config.spring.api.HelloService;
+import com.alibaba.dubbo.config.spring.impl.DemoServiceImpl;
+import com.alibaba.dubbo.config.spring.impl.HelloServiceImpl;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class SpringExtensionFactoryTest {
+
+    private SpringExtensionFactory springExtensionFactory = new SpringExtensionFactory();
+    private AnnotationConfigApplicationContext context1;
+    private AnnotationConfigApplicationContext context2;
+
+    @Before
+    public void init() {
+        context1 = new AnnotationConfigApplicationContext();
+        context1.register(getClass());
+        context1.refresh();
+        context2 = new AnnotationConfigApplicationContext();
+        context2.register(BeanForContext2.class);
+        context2.refresh();
+        SpringExtensionFactory.addApplicationContext(context1);
+        SpringExtensionFactory.addApplicationContext(context2);
+    }
+
+    @Test
+    public void testGetExtensionByName() {
+        DemoService bean = springExtensionFactory.getExtension(DemoService.class, "bean1");
+        Assert.assertNotNull(bean);
+    }
+
+    @Test
+    public void testGetExtensionByTypeMultiple() {
+        try {
+            springExtensionFactory.getExtension(DemoService.class, "beanname-not-exist");
+        } catch (Exception e) {
+            e.printStackTrace();
+            Assert.assertTrue(e instanceof NoUniqueBeanDefinitionException);
+        }
+    }
+
+    @Test
+    public void testGetExtensionByType() {
+        HelloService bean = springExtensionFactory.getExtension(HelloService.class, "beanname-not-exist");
+        Assert.assertNotNull(bean);
+    }
+
+    @After
+    public void destroy() {
+        SpringExtensionFactory.clearContexts();
+        context1.close();
+        context2.close();
+    }
+
+    @Bean("bean1")
+    public DemoService bean1() {
+        return new DemoServiceImpl();
+    }
+
+    @Bean("bean2")
+    public DemoService bean2() {
+        return new DemoServiceImpl();
+    }
+
+    @Bean("hello")
+    public HelloService helloService() {
+        return new HelloServiceImpl();
+    }
+}