com.luoshu.open.id.IdContext Maven / Gradle / Ivy

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package com.luoshu.open.id;

import com.luoshu.open.id.exception.IdException;

import java.util.HashMap;
import java.util.Map;

/**
 * id 的上下文
 * @author inme
 */
public class IdContext {

    public static final String DEFAULT = "default";

    private static final Map cache = new HashMap<>();

    private static IdFactory defaultFactory = null;

    protected synchronized static void addIdFactory(IdFactory idFactory){
        String name = idFactory.getName();
        if(cache.containsKey(name)){
            throw new IdException("IdFactory name is repeat : " + name);
        }
        if(DEFAULT.equals(name)){
            defaultFactory = idFactory;
        }

        cache.put(name , idFactory);
    }

    /**
     * 返回默认的
     * @return
     */
    public static IdFactory getIdFactory(){
        return defaultFactory;
    }

    /**
     * 根据工厂名称，来获取 id 工厂
     * @param name
     * @return
     */
    public static IdFactory getIdFactory(String name){
        return cache.get(name);
    }


}