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/*
* 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.registry.integration;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.extension.SPI;
import org.apache.dubbo.rpc.Exporter;
import org.apache.dubbo.rpc.cluster.ClusterInvoker;
import static org.apache.dubbo.common.extension.ExtensionScope.MODULE;
/**
* RegistryProtocol listener is introduced to provide a chance to user to customize or change export and refer behavior
* of RegistryProtocol. For example: re-export or re-refer on the fly when certain condition meets.
*/
@SPI(scope = MODULE)
public interface RegistryProtocolListener {
/**
* Notify RegistryProtocol's listeners when a service is registered
*
* @param registryProtocol RegistryProtocol instance
* @param exporter exporter
* @see RegistryProtocol#export(org.apache.dubbo.rpc.Invoker)
*/
void onExport(RegistryProtocol registryProtocol, Exporter exporter);
/**
* Notify RegistryProtocol's listeners when a service is subscribed
*
* @param registryProtocol RegistryProtocol instance
* @param invoker invoker
* @param url
* @see RegistryProtocol#refer(Class, URL)
*/
void onRefer(RegistryProtocol registryProtocol, ClusterInvoker invoker, URL url, URL registryURL);
/**
* Notify RegistryProtocol's listeners when the protocol is destroyed
*/
void onDestroy();
}