dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.dao;
 
import foundation.data.entity.Entity;
import foundation.data.loader.DataPackageMetaLoader;
import foundation.data.object.DataObject;
import foundation.data.object.DataObjectContainer;
import foundation.server.Container;
import foundation.util.Util;
 
public class DataPackageMetaContainer extends Container<DataPackageMeta> {
    
    private static DataPackageMetaContainer instance;
    
    
    private DataPackageMetaContainer() {
        
    }
    
    public synchronized static DataPackageMetaContainer getInstance() {
        if (instance == null) {
            instance = new DataPackageMetaContainer();
        }
        
        return instance;
    }
 
    @Override
    public DataPackageMeta get(String name) {
        DataPackageMeta result = super.get(name);
        
        if (result == null) {
            DataObject dataObject = DataObject.getInstance(name);
            
            if (dataObject == null) {
                return null;
            }
            
            //如果有dataObject，但是没有定义DataPackage，那么创建默认的DataPackageMeta
            try {
                synchronized (this) {
                    result = new DataPackageMeta(dataObject); 
                    add(name, result);
                }
            }
            catch (Exception e) {
                e.printStackTrace();
            }
        }
        
        return result;
    }
 
    public synchronized DataPackageMeta refresh(String dataName) throws Exception {
        //1. 加载新的 data package 定义
        DataPackageMeta result = DataPackageMetaLoader.loadOneDataPackage(dataName);
        
        //2. 将新的  data package 放到 container中
        add(result.getName(), result);
        
        //3. 返回结果
        return result;
    }
 
    public void createByName(String name) throws Exception {
        if (Util.isEmpty(name)) {
            return;
        }
        DataObject packageDataObject = DataObject.getInstance("sys_data_package");
        Entity packageEntity = packageDataObject.createTableEntity(true);
        String packageId = DataPackageMeta.PreFix + name;
        packageEntity.set("id", packageId);
        packageEntity.set("name", name);
        packageEntity.set("remark", name);
 
        DataObject packageDetailDataObject = DataObject.getInstance("sys_data_package_detail");
        Entity packageDetailEntity = packageDetailDataObject.createTableEmptyEntity();
        packageDetailEntity.set("id", name);
        packageDetailEntity.set("parent_id", packageId);
        packageDetailEntity.set("name", name);
        packageDetailEntity.set("data_object", name);
        packageDetailEntity.set("type_code", "Master");
 
        packageDataObject.saveEntity(packageEntity);
        packageDetailDataObject.saveEntity(packageDetailEntity);
 
        DataObjectContainer.getInstance().createOne(name);
 
        //2
        DataPackageMeta packageMeta = new DataPackageMeta();
        packageMeta.load(packageEntity);
        PackageItemMeta itemMeta = new PackageItemMeta();
        itemMeta.load(packageDetailEntity);
        itemMeta.setDataObject();
        
        packageMeta.loadOneDetail(itemMeta);
        
        DataPackageMetaContainer.getInstance().add(packageMeta.getName(), packageMeta);
    }
 
}