[Dubbo-2298] Add Annotation-Driven for MethodConfig and ArgumentConfig (#2603)

* support methodConfig and argementConfig. fix #2298

* unit test

* unit test

* remove unused

* remove author

* add licence

* format the code

Author: cvictory

dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/AbstractConfig.java

@@ -423,7 +423,7 @@ protected void appendAnnotation(Class<?> annotationClass, Object annotation) {
                     }
                     String setter = "set" + property.substring(0, 1).toUpperCase() + property.substring(1);
                     Object value = method.invoke(annotation);
-                    if (value != null && !value.equals(method.getDefaultValue())) {
+                    if (!isAnnotationArray(method.getReturnType()) &&  value != null && !value.equals(method.getDefaultValue())) {
                         Class<?> parameterType = ReflectUtils.getBoxedClass(method.getReturnType());
                         if ("filter".equals(property) || "listener".equals(property)) {
                             parameterType = String.class;
@@ -446,6 +446,13 @@ protected void appendAnnotation(Class<?> annotationClass, Object annotation) {
         }
     }
 
+    boolean isAnnotationArray(Class target) {
+        if (target.isArray() && target.getComponentType().isAnnotation()) {
+            return true;
+        }
+        return false;
+    }
+
     @Override
     public String toString() {
         try {

dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ArgumentConfig.java

@@ -16,6 +16,7 @@
  */
 package com.alibaba.dubbo.config;
 
+import com.alibaba.dubbo.config.annotation.Argument;
 import com.alibaba.dubbo.config.support.Parameter;
 
 import java.io.Serializable;
@@ -36,6 +37,15 @@ public class ArgumentConfig implements Serializable {
     //callback interface
     private Boolean callback;
 
+    public ArgumentConfig() {
+    }
+
+    public ArgumentConfig(Argument argument) {
+        this.index = argument.index();
+        this.type = argument.type();
+        this.callback = argument.callback();
+    }
+
     @Parameter(excluded = true)
     public Integer getIndex() {
         return index;
@@ -62,4 +72,4 @@ public Boolean isCallback() {
         return callback;
     }
 
-}
+}

dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/MethodConfig.java

@@ -17,8 +17,11 @@
 package com.alibaba.dubbo.config;
 
 import com.alibaba.dubbo.common.Constants;
+import com.alibaba.dubbo.config.annotation.Method;
 import com.alibaba.dubbo.config.support.Parameter;
 
+import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 /**
@@ -74,6 +77,37 @@ public class MethodConfig extends AbstractMethodConfig {
 
     private List<ArgumentConfig> arguments;
 
+    public MethodConfig() {
+    }
+
+    public MethodConfig(Method method) {
+        appendAnnotation(Method.class, method);
+        this.setReturn(method.isReturn());
+        this.setOninvoke(method.oninvoke());
+        this.setOnreturn(method.onreturn());
+        this.setOnthrow(method.onthrow());
+        if (method.arguments() != null && method.arguments().length != 0) {
+            List<ArgumentConfig> argumentConfigs = new ArrayList<ArgumentConfig>(method.arguments().length);
+            this.setArguments(argumentConfigs);
+            for (int i = 0; i < method.arguments().length; i++) {
+                ArgumentConfig argumentConfig = new ArgumentConfig(method.arguments()[i]);
+                argumentConfigs.add(argumentConfig);
+            }
+        }
+    }
+
+    public static List<MethodConfig> constructMethodConfig(Method[] methods) {
+        if (methods != null && methods.length != 0) {
+            List<MethodConfig> methodConfigs = new ArrayList<MethodConfig>(methods.length);
+            for (int i = 0; i < methods.length; i++) {
+                MethodConfig methodConfig = new MethodConfig(methods[i]);
+                methodConfigs.add(methodConfig);
+            }
+            return methodConfigs;
+        }
+        return Collections.emptyList();
+    }
+
     @Parameter(excluded = true)
     public String getName() {
         return name;
@@ -211,4 +245,4 @@ public void setReturn(Boolean isReturn) {
         this.isReturn = isReturn;
     }
 
-}
+}

dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ReferenceConfig.java

@@ -112,6 +112,7 @@ public ReferenceConfig() {
 
     public ReferenceConfig(Reference reference) {
         appendAnnotation(Reference.class, reference);
+        setMethods(MethodConfig.constructMethodConfig(reference.methods()));
     }
 
     private static void checkAndConvertImplicitConfig(MethodConfig method, Map<String, String> map, Map<Object, Object> attributes) {

dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ServiceConfig.java

@@ -101,6 +101,7 @@ public ServiceConfig() {
 
     public ServiceConfig(Service service) {
         appendAnnotation(Service.class, service);
+        setMethods(MethodConfig.constructMethodConfig(service.methods()));
     }
 
     @Deprecated

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

@@ -0,0 +1,44 @@
+/*
+ * 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.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * @since 2.6.5
+ *
+ * 2018/9/29
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.ANNOTATION_TYPE})
+@Inherited
+public @interface Argument {
+    //argument: index -1 represents not set
+    int index() default -1;
+
+    //argument type
+    String type() default "";
+
+    //callback interface
+    boolean callback() default false;
+}

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

@@ -0,0 +1,70 @@
+/*
+ * 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.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * @since 2.6.5
+ *  *
+ *  * 2018/9/29
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.ANNOTATION_TYPE})
+@Inherited
+public @interface Method {
+    String name();
+
+    int timeout() default -1;
+
+    int retries() default -1;
+
+    String loadbalance() default "";
+
+    boolean async() default false;
+
+    boolean sent() default true;
+
+    int actives() default 0;
+
+    int executes() default 0;
+
+    boolean deprecated() default false;
+
+    boolean sticky() default false;
+
+    boolean isReturn() default true;
+
+    String oninvoke() default "";
+
+    String onreturn() default "";
+
+    String onthrow() default "";
+
+    String cache() default "";
+
+    String validation() default "";
+
+    Argument[] arguments() default {};
+}

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

@@ -118,6 +118,8 @@
      * @return the default value is ""
      * @since 2.6.6
      */
-    String protocol() default "";
+    String protocol() default "";  
+  
+    Method[] methods() default {};
 
-}
+}