Nacos源码分析系列之Naming模块-集群篇-理论概念

public enum ServerStatus {
    /**
     * server is up and ready for request
     */
    UP,
    /**
     * server is out of service, something abnormal happened
     */
    DOWN,
    /**
     * server is preparing itself for request, usually 'UP' is the next status
     */
    STARTING,
    /**
     * server is manually paused
     */
    PAUSED,
    /**
     * only write operation is permitted.
     */
    WRITE_ONLY,
    /**
     * only read operation is permitted.
     */
    READ_ONLY
}

public enum ServerMode {
    /**
     * AP mode
     */
    AP,
    /**
     * CP mode
     */
    CP,
    /**
     * Mixed mode
     */
    MIXED
}

/**
     * IP of member
     */
    private String ip;

    /**
     * serving port of member.
     */
    private int servePort;

    private String site = UtilsAndCommons.UNKNOWN_SITE;

    private int weight = 1;

    /**
     * additional weight, used to adjust manually
     */
    private int adWeight;

    private boolean alive = false;

    private long lastRefTime = 0L;

    private String lastRefTimeStr;

public interface ServerChangeListener {

    /**
     * If member list changed, this method is invoked.
     *
     * @param servers servers after change
     */
    void onChangeServerList(List<Server> servers);

    /**
     * If reachable member list changed, this method is invoked.
     *
     * @param healthyServer reachable servers after change
     */
    void onChangeHealthyServerList(List<Server> healthyServer);
}