使用Tinkerpop框架从数据库中分离后，更新顶点的最佳做法是什么？ [英] What is the best practice to update a Vertex after is detached from DB with Tinkerpop Frames?

问题描述

让我们来举例说明

1. 我用Tinkerpop Blueprint接收一个顶点，然后使用Frames将它转换为实体。


2. 我关闭数据库（所以从现在开始，数据库从数据库中分离出来）
   
3. 然后我在网页上显示节点让用户修改它。

用户进行了一些修改，然后我应该坚持修改。

问题是数据库的实例已经关闭，所以实体与数据库分离：更新节点的最佳实践（考虑性能和内存使用情况）？

这可能是代码示例：

  FramedGraph< OrientGraph> graph = factory.getFramedGraph（）; 
 User user = graph.addVertex（null，User.class）; 
 graph.shutdown（）; 
  

然后我想稍后更新节点：

  user.name =唐老鸭; 
用户....？ 
  

谢谢，
Andrea

解决方案

我发现这种方式，看起来效率很高：

  public User persistUser用户用户）{
 
 FramedGraph< OrientGraph> graph = factory.getFramedGraph（）; 
 
 user = graph.frame（user.asVertex（），User.class）; 
 factory.persist（）; 
 graph.shutdown（）; 
  

所以框架自动将实体合并回数据库。
然后你必须坚持下去。

Let's exemplify

1. I receive a Vertex with Tinkerpop Blueprint, then I use Frames to convert it in an entity.
2. I close the database (so from now the node is detached from the DB)
3. and I show the node on a web page to let the user modify it.

The user makes some modifications, then I shoud persist the changes.

The problem is that the Instance of the database is already closed, so the entity is detached from the database: What is the best practice (considering performance and memory usage too) to update the node?

This may be the code example:

 FramedGraph<OrientGraph> graph = factory.getFramedGraph();
 User user = graph.addVertex(null, User.class);
 graph.shutdown();

then I want to update later the node:

 user.name = "Donald Duck";
 user.... ?

Thank you, Andrea

解决方案

I found this way, that seems quite efficient:

public User persistUser(User user){

    FramedGraph<OrientGraph> graph = factory.getFramedGraph();

    user = graph.frame(user.asVertex(), User.class);
    factory.persist();
    graph.shutdown();

So the framework automatically merge back the entity to the database. Then you have to persist.

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