dubbo LoadingStrategy 源码
dubbo LoadingStrategy 代码
文件路径：/dubbo-common/src/main/java/org/apache/dubbo/common/extension/LoadingStrategy.java
/*
* 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 org.apache.dubbo.common.extension;
import org.apache.dubbo.common.lang.Prioritized;
public interface LoadingStrategy extends Prioritized {
String directory();
default boolean preferExtensionClassLoader() {
return false;
}
default String[] excludedPackages() {
return null;
}
/**
* To restrict some class that should not be loaded from `org.apache.dubbo` package type SPI class.
* For example, we can restrict the implementation class which package is `org.xxx.xxx`
* can be loaded as SPI implementation.
*
* @return packages can be loaded in `org.apache.dubbo`'s SPI
*/
default String[] includedPackages() {
// default match all
return null;
}
/**
* To restrict some class that should not be loaded from `org.alibaba.dubbo`(for compatible purpose)
* package type SPI class.
* For example, we can restrict the implementation class which package is `org.xxx.xxx`
* can be loaded as SPI implementation
*
* @return packages can be loaded in `org.alibaba.dubbo`'s SPI
*/
default String[] includedPackagesInCompatibleType() {
// default match all
return null;
}
/**
* To restrict some class that should load from Dubbo's ClassLoader.
* For example, we can restrict the class declaration in `org.apache.dubbo` package should
* be loaded from Dubbo's ClassLoader and users cannot declare these classes.
*
* @return class packages should load
* @since 3.0.4
*/
default String[] onlyExtensionClassLoaderPackages() {
return new String[]{};
}
/**
* Indicates current {@link LoadingStrategy} supports overriding other lower prioritized instances or not.
*
* @return if supports, return <code>true</code>, or <code>false</code>
* @since 2.7.7
*/
default boolean overridden() {
return false;
}
default String getName() {
return this.getClass().getSimpleName();
}
/**
* when spi is loaded by dubbo framework classloader only, it indicates all LoadingStrategy should load this spi
*/
String ALL = "ALL";
}
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