com.kaka.notice.FacadeFactory Maven / Gradle / Ivy

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package com.kaka.notice;

import com.kaka.util.ReflectUtils;

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

/**
 * {@link Facade} 工厂
 *
 * @author zkpursuit
 */
public class FacadeFactory {

    private static Class facadeClass = Facade.class;
    private static final String DEFAULT = "default";
    static final Map instanceMap = new HashMap<>();

    /**
     * 必须先调用此方法进行配置 

     * 一般在应用程序启动时调用，且仅调用一次
     *
     * @param facadeClass 事件总线类
     * @param          事件总线实现类泛型限定
     * @return 事件总线类实例
     */
    public synchronized static  T config(Class facadeClass) {
        FacadeFactory.facadeClass = facadeClass;
        return getFacade();
    }

    public synchronized static  T getFacade(String name) {
        Facade inst;
        if (instanceMap.get(name) == null) {
            try {
                inst = ReflectUtils.newInstance(facadeClass);
                inst.__name = name;
                instanceMap.put(name, inst);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        } else {
            inst = instanceMap.get(name);
        }
        return (T) inst;
    }

    public synchronized static  T getFacade() {
        return getFacade(DEFAULT);
    }

    public synchronized static boolean hasFacade(String name) {
        return instanceMap.containsKey(name);
    }

    public synchronized static void removeFacade(String name) {
        Facade inst = instanceMap.remove(name);
        if (inst != null) {
            inst.dispose();
        }
    }

}