ars.module.system.service.AbstractRecyclableService Maven / Gradle / Ivy

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package ars.module.system.service;

import java.util.Map;
import java.util.List;
import java.util.HashMap;
import java.io.Serializable;

import ars.util.Beans;
import ars.invoke.request.Requester;
import ars.module.system.model.Recycle;
import ars.module.system.model.Recyclable;
import ars.database.repository.Repository;
import ars.database.repository.Repositories;
import ars.database.service.event.DeleteEvent;
import ars.database.service.event.ServiceListener;
import ars.database.service.StandardGeneralService;

/**
 * 可回收配置业务操作抽象实现
 *
 * @param  数据模型
 * @author wuyongqiang
 */
public abstract class AbstractRecyclableService extends StandardGeneralService
    implements RecyclableService, ServiceListener {
    private Map recyclables; // 可回收配置缓存

    /**
     * 初始化可回收配置缓存
     */
    protected void initRecyclableCache() {
        if (this.recyclables == null) {
            List recyclables = this.getRepository().query().list();
            this.recyclables = new HashMap(recyclables.size());
            for (int i = 0; i < recyclables.size(); i++) {
                T recyclable = recyclables.get(i);
                this.recyclables.put(recyclable.getModel(), recyclable);
            }
        }
    }

    /**
     * 获取数据模型对应可回收配置
     *
     * @param model 数据模型名称
     * @return 可回收配置对象
     */
    protected T getRecyclable(String model) {
        if (this.recyclables == null) {
            synchronized (this) {
                this.initRecyclableCache();
            }
        }
        return this.recyclables.get(model);
    }

    /**
     * 记录删除数据
     *
     * @param requester  请求对象
     * @param recyclable 可回收配置对象实例
     * @param entity     被删除对象实例
     */
    protected void record(Requester requester, T recyclable, Serializable entity) {
        Repository repository = Repositories.getRepository(Recycle.class);
        Recycle recycle = Beans.getInstance(repository.getModel());
        recycle.setName(entity.toString());
        recycle.setModel(entity.getClass().getName());
        recycle.setEntity(entity);
        recycle.setRecyclable(recyclable);
        repository.save(recycle);
    }

    @Override
    public Serializable saveObject(Requester requester, T object) {
        Serializable id = super.saveObject(requester, object);
        synchronized (this) {
            this.initRecyclableCache();
            this.recyclables.put(object.getModel(), object);
        }
        return id;
    }

    @Override
    public void updateObject(Requester requester, T object) {
        super.updateObject(requester, object);
        synchronized (this) {
            this.initRecyclableCache();
            this.recyclables.put(object.getModel(), object);
        }
    }

    @Override
    public void deleteObject(Requester requester, T object) {
        super.deleteObject(requester, object);
        synchronized (this) {
            this.initRecyclableCache();
            this.recyclables.remove(object.getModel());
        }
    }

    @Override
    public void onServiceEvent(DeleteEvent event) {
        T recyclable = null;
        Serializable entity = (Serializable) event.getEntity();
        Class model = event.getService().getModel();
        if (!Recycle.class.isAssignableFrom(model) && !Recyclable.class.isAssignableFrom(model)
            && (recyclable = this.getRecyclable(model.getName())) != null) {
            this.record(event.getSource(), recyclable, entity);
        }
    }

}