dubbo RouterFactory 源码
dubbo RouterFactory 代码
文件路径：/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/RouterFactory.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.rpc.cluster;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.extension.Adaptive;
import org.apache.dubbo.common.extension.SPI;
/**
* RouterFactory. (SPI, Singleton, ThreadSafe)
* <p>
* <a href="http://en.wikipedia.org/wiki/Routing">Routing</a>
*
* @see org.apache.dubbo.rpc.cluster.Cluster#join(Directory)
* @see org.apache.dubbo.rpc.cluster.Directory#list(org.apache.dubbo.rpc.Invocation)
* <p>
* Note Router has a different behaviour since 2.7.0, for each type of Router, there will only has one Router instance
* for each service. See {@link CacheableRouterFactory} and {@link RouterChain} for how to extend a new Router or how
* the Router instances are loaded.
*/
@SPI
public interface RouterFactory {
/**
* Create router.
* Since 2.7.0, most of the time, we will not use @Adaptive feature, so it's kept only for compatibility.
*
* @param url url
* @return router instance
*/
@Adaptive("protocol")
Router getRouter(URL url);
}
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