/* | |
* 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; | |
/** | |
* 替换: | |
* 请使用KV格式的配置文件:META-INF/dubbo/com.xxx.Protocol,文件内容:xxx=com.xxx.XxxProtocol | |
* | |
* 原因: | |
* 当扩展点的static字段或方法签名上引用了三方库, | |
* 如果三方库不存在,会导致类初始化失败, | |
* Extension标识Dubbo就拿不到了,异常信息就和配置对应不起来。 | |
* | |
* 比如: | |
* Extension("mina")加载失败, | |
* 当用户配置使用mina时,就会报找不到扩展点, | |
* 而不是报加载扩展点失败,以及失败原因。 | |
* | |
* @deprecated | |
* @author william.liangf | |
* @author ding.lid | |
*/ | |
@Deprecated | |
@Documented | |
@Retention(RetentionPolicy.RUNTIME) | |
@Target({ElementType.TYPE}) | |
public @interface Extension { | |
/** | |
* @deprecated | |
*/ | |
@Deprecated | |
String value() default ""; | |
} |