先在URL上找key1的Value作为要Adapt成的Extension名;
@@ -50,7 +50,7 @@ public @interface Adaptive {
* 如果不设置则缺省使用Extension接口类名的点分隔小写字串。
* 即对于Extension接口{@code com.alibaba.dubbo.xxx.YyyInvokerWrapper}的缺省值为String[] {"yyy.invoker.wrapper"}
*
- * @see Extension#value()
+ * @see Default#value()
*/
String[] value() default {};
diff --git a/dubbo-common/src/main/java/com/alibaba/dubbo/common/Default.java b/dubbo-common/src/main/java/com/alibaba/dubbo/common/Default.java
new file mode 100644
index 0000000000..a235c89354
--- /dev/null
+++ b/dubbo-common/src/main/java/com/alibaba/dubbo/common/Default.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 1999-2011 Alibaba Group.
+ *
+ * Licensed 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.common;
+
+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;
+
+/**
+ * 扩展点实现的元信息。
+ *
+ * @author william.liangf
+ * @author ding.lid
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE})
+public @interface Default {
+
+ /**
+ * 扩展点名称。
+ *
+ * 如果注解在扩展的接口上,则缺省的扩展点。
+ */
+ String value() default "";
+}
\ No newline at end of file
diff --git a/dubbo-common/src/main/java/com/alibaba/dubbo/common/Extension.java b/dubbo-common/src/main/java/com/alibaba/dubbo/common/Extension.java
index 95ef1e7d82..b0a2333192 100644
--- a/dubbo-common/src/main/java/com/alibaba/dubbo/common/Extension.java
+++ b/dubbo-common/src/main/java/com/alibaba/dubbo/common/Extension.java
@@ -24,9 +24,12 @@ import java.lang.annotation.Target;
/**
* 扩展点实现的元信息。
*
+ * @deprecated 请在META-INF/services/配置文件中声明扩展点名称,如:fixed=com.xxx.FixedThreadPool
+ *
* @author william.liangf
* @author ding.lid
*/
+@Deprecated
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE})
diff --git a/dubbo-common/src/main/java/com/alibaba/dubbo/common/ExtensionLoader.java b/dubbo-common/src/main/java/com/alibaba/dubbo/common/ExtensionLoader.java
index a323e7bf00..6f97c278e5 100644
--- a/dubbo-common/src/main/java/com/alibaba/dubbo/common/ExtensionLoader.java
+++ b/dubbo-common/src/main/java/com/alibaba/dubbo/common/ExtensionLoader.java
@@ -50,7 +50,7 @@ import com.alibaba.dubbo.common.utils.StringUtils;
* @author william.liangf
* @author ding.lid
*
- * @see Extension
+ * @see Default
* @see Adaptive
*/
public class ExtensionLoader {
@@ -64,6 +64,8 @@ public class ExtensionLoader {
private static final ConcurrentMap, ExtensionLoader>> EXTENSION_LOADERS = new ConcurrentHashMap, ExtensionLoader>>();
private final Class> type;
+
+ private final ConcurrentMap, String> cachedNames = new ConcurrentHashMap, String>();
private final Reference