修改afterMethod接口，以及相关的依赖实现。允许afterMethod复写方法的返回值，用于进行特定的类包装。#36

skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/ClassMethodInterceptor.java

@@ -45,15 +45,17 @@ public class ClassMethodInterceptor {
 			logger.error("class[{}] before method[{}] intercept failue:{}",
 					obj.getClass(), method.getName(), t.getMessage(), t);
 		}
+		Object ret = null;
 		try {
-			return zuper.call();
+			ret =  zuper.call();
 		} finally {
 			try {
-				interceptor.afterMethod(instanceContext, interceptorContext);
+				ret = interceptor.afterMethod(instanceContext, interceptorContext, ret);
 			} catch (Throwable t) {
 				logger.error("class[{}] after method[{}] intercept failue:{}",
 						obj.getClass(), method.getName(), t.getMessage(), t);
 			}
 		}
+		return ret;
 	}
 }

skywalking-api/src/main/java/com/ai/cloud/skywalking/plugin/interceptor/IAroundInterceptor.java

@@ -5,7 +5,7 @@ public interface IAroundInterceptor {
 	
 	public void beforeMethod(EnhancedClassInstanceContext context, InterceptorContext interceptorContext);
 	
-	public void afterMethod(EnhancedClassInstanceContext context, InterceptorContext interceptorContext);
+	public Object afterMethod(EnhancedClassInstanceContext context, InterceptorContext interceptorContext, Object ret);
 	
 	
 }

skywalking-api/src/test/java/test/ai/cloud/plugin/PluginMainTest.java

@@ -8,12 +8,19 @@ import com.ai.cloud.skywalking.plugin.TracingBootstrap;
 
 public class PluginMainTest {
 	@Test
-	public void testMain() throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException, ClassNotFoundException{
-		TracingBootstrap.main(new String[]{"test.ai.cloud.plugin.PluginMainTest"});
+	public void testMain() throws IllegalAccessException,
+			IllegalArgumentException, InvocationTargetException,
+			NoSuchMethodException, SecurityException, ClassNotFoundException {
+		TracingBootstrap
+				.main(new String[] { "test.ai.cloud.plugin.PluginMainTest" });
 	}
-	
-	public static void main(String[] args){
+
+	public static void main(String[] args) {
+		long start = System.currentTimeMillis();
+
 		BeInterceptedClass inst = new BeInterceptedClass();
 		inst.printabc();
+		long end = System.currentTimeMillis();
+		System.out.println(end - start + "ms");
 	}
 }

skywalking-api/src/test/java/test/ai/cloud/plugin/TestAroundInterceptor.java

@@ -19,8 +19,9 @@ public class TestAroundInterceptor implements IAroundInterceptor {
 	}
 
 	@Override
-	public void afterMethod(EnhancedClassInstanceContext context, InterceptorContext interceptorContext) {
+	public Object afterMethod(EnhancedClassInstanceContext context, InterceptorContext interceptorContext, Object ret) {
 		System.out.println("afterMethod: " + context.get("test.key", String.class));
+		return ret;
 	}
 
 }