dubbo InstanceMetadataChangedListener 源码
dubbo InstanceMetadataChangedListener 代码
文件路径：/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/InstanceMetadataChangedListener.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.metadata;
public interface InstanceMetadataChangedListener {
/**
* Call when metadata in provider side update <p/>
* Used to notify consumer to update metadata of ServiceInstance
*
* @param metadata latest metadata
*/
void onEvent(String metadata);
/**
* Echo test
* Used to check consumer still online
*/
default String echo(String msg) {
return msg;
}
}
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