[Enhancement] inline the source code of spring-context-support

dependencies-bom/pom.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<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/xsd/maven-4.0.0.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/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <parent>
@@ -101,6 +102,7 @@
         <rs_api_version>2.0</rs_api_version>
         <resteasy_version>3.0.19.Final</resteasy_version>
         <tomcat_embed_version>8.5.31</tomcat_embed_version>
+
         <!-- Log libs -->
         <slf4j_version>1.7.25</slf4j_version>
         <jcl_version>1.2</jcl_version>
@@ -302,6 +304,7 @@
                 <artifactId>tomcat-embed-logging-juli</artifactId>
                 <version>${tomcat_embed_version}</version>
             </dependency>
+
             <!-- Log libs -->
             <dependency>
                 <groupId>org.slf4j</groupId>
@@ -363,13 +366,6 @@
 
             <!-- Alibaba extensions -->
 
-            <!-- Spring Context Support -->
-            <dependency>
-                <groupId>com.alibaba.spring</groupId>
-                <artifactId>spring-context-support</artifactId>
-                <version>${alibaba_spring_context_support_version}</version>
-            </dependency>
-
             <!-- YAML -->
             <dependency>
                 <groupId>org.yaml</groupId>

dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/annotation/Reference.java

@@ -1,115 +1,123 @@
-/*
- * 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.annotation;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-/**
- * Reference
- *
- * @export
- */
-@Documented
-@Retention(RetentionPolicy.RUNTIME)
-@Target({ElementType.FIELD, ElementType.METHOD, ElementType.ANNOTATION_TYPE})
-public @interface Reference {
-
-    Class<?> interfaceClass() default void.class;
-
-    String interfaceName() default "";
-
-    String version() default "";
-
-    String group() default "";
-
-    String url() default "";
-
-    String client() default "";
-
-    boolean generic() default false;
-
-    boolean injvm() default false;
-
-    boolean check() default true;
-
-    boolean init() default false;
-
-    boolean lazy() default false;
-
-    boolean stubevent() default false;
-
-    String reconnect() default "";
-
-    boolean sticky() default false;
-
-    String proxy() default "";
-
-    String stub() default "";
-
-    String cluster() default "";
-
-    int connections() default 0;
-
-    int callbacks() default 0;
-
-    String onconnect() default "";
-
-    String ondisconnect() default "";
-
-    String owner() default "";
-
-    String layer() default "";
-
-    int retries() default 2;
-
-    String loadbalance() default "";
-
-    boolean async() default false;
-
-    int actives() default 0;
-
-    boolean sent() default false;
-
-    String mock() default "";
-
-    String validation() default "";
-
-    int timeout() default 0;
-
-    String cache() default "";
-
-    String[] filter() default {};
-
-    String[] listener() default {};
-
-    String[] parameters() default {};
-
-    String application() default "";
-
-    String module() default "";
-
-    String consumer() default "";
-
-    String monitor() default "";
-
-    String[] registry() default {};
-
-}
+/*
+ * 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.annotation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Reference
+ *
+ * @export
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.FIELD, ElementType.METHOD, ElementType.ANNOTATION_TYPE})
+public @interface Reference {
+
+    Class<?> interfaceClass() default void.class;
+
+    String interfaceName() default "";
+
+    String version() default "";
+
+    String group() default "";
+
+    String url() default "";
+
+    String client() default "";
+
+    boolean generic() default false;
+
+    boolean injvm() default false;
+
+    boolean check() default true;
+
+    boolean init() default false;
+
+    boolean lazy() default false;
+
+    boolean stubevent() default false;
+
+    String reconnect() default "";
+
+    boolean sticky() default false;
+
+    String proxy() default "";
+
+    String stub() default "";
+
+    String cluster() default "";
+
+    int connections() default 0;
+
+    int callbacks() default 0;
+
+    String onconnect() default "";
+
+    String ondisconnect() default "";
+
+    String owner() default "";
+
+    String layer() default "";
+
+    int retries() default 2;
+
+    String loadbalance() default "";
+
+    boolean async() default false;
+
+    int actives() default 0;
+
+    boolean sent() default false;
+
+    String mock() default "";
+
+    String validation() default "";
+
+    int timeout() default 0;
+
+    String cache() default "";
+
+    String[] filter() default {};
+
+    String[] listener() default {};
+
+    String[] parameters() default {};
+
+    String application() default "";
+
+    String module() default "";
+
+    String consumer() default "";
+
+    String monitor() default "";
+
+    String[] registry() default {};
+
+    /**
+     * The communication protocol of Dubbo Service
+     *
+     * @return the default value is ""
+     * @since 2.6.6
+     */
+    String protocol() default "";
+
+}