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/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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.nacos.client.naming.utils;
import java.util.List;
/**
* @author nkorange
*/
public interface Poller {
/**
* Get next element selected by poller
*
* @return next element
*/
T next();
/**
* Update items stored in poller
*
* @param items new item list
* @return new poller instance
*/
Poller refresh(List items);
}