//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package com.netflix.loadbalancer;
import com.netflix.client.config.IClientConfig;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class RoundRobinRule extends AbstractLoadBalancerRule {
    private AtomicInteger nextServerCyclicCounter;
    private static final boolean AVAILABLE_ONLY_SERVERS = true;
    private static final boolean ALL_SERVERS = false;
    private static Logger log = LoggerFactory.getLogger(RoundRobinRule.class);
    public RoundRobinRule() {
        this.nextServerCyclicCounter = new AtomicInteger(0);
    }
    public RoundRobinRule(ILoadBalancer lb) {
        this();
        this.setLoadBalancer(lb);
    }
    public Server choose(ILoadBalancer lb, Object key) {
        if (lb == null) {
            log.warn("no load balancer");
            return null;
        } else {
            Server server = null;
            int count = 0;
            while(true) {
                if (server == null && count++ < 10) {
                    List<Server> reachableServers = lb.getReachableServers();
                    List<Server> allServers = lb.getAllServers();
                    int upCount = reachableServers.size();
                    int serverCount = allServers.size();
                    if (upCount != 0 && serverCount != 0) {
                        int nextServerIndex = this.incrementAndGetModulo(serverCount);
                        server = (Server)allServers.get(nextServerIndex);
                        if (server == null) {
                            Thread.yield();
                        } else {
                            if (server.isAlive() && server.isReadyToServe()) {
                                return server;
                            }
                            server = null;
                        }
                        continue;
                    }
                    log.warn("No up servers available from load balancer: " + lb);
                    return null;
                }
                if (count >= 10) {
                    log.warn("No available alive servers after 10 tries from load balancer: " + lb);
                }
                return server;
            }
        }
    }
    private int incrementAndGetModulo(int modulo) {
        int current;
        int next;
        do {
            current = this.nextServerCyclicCounter.get();
            next = (current + 1) % modulo;
        } while(!this.nextServerCyclicCounter.compareAndSet(current, next));
        return next;
    }
    public Server choose(Object key) {
        return this.choose(this.getLoadBalancer(), key);
    }
    public void initWithNiwsConfig(IClientConfig clientConfig) {
    }
}