com.lsq.springboot.datasource.starter.strategy.LoadBalanceDataSourceSelectorStrategy Maven / Gradle / Ivy

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/*
 * Copyright 2018 the organization loushi135
 *
 * 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.lsq.springboot.datasource.starter.strategy;

import javax.sql.DataSource;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * 负载均衡策略
 *
 */
public class LoadBalanceDataSourceSelectorStrategy implements DataSourceSelectorStrategy {

    /**
     * 负载均衡计数器
     */
    private AtomicInteger index = new AtomicInteger(0);

    @Override
    public DataSource determineDataSource(List dataSources) {
        return dataSources.get(Math.abs(index.getAndAdd(1)) % dataSources.size());
    }
}