Implement method of data access object mode based on dynamic proxy

Abstract

A method for realizing data access object mode based on dynamic agent includes applying open source object mapping tool Hibernate to realize DAO, utilizing DAO layer to carry out API interaction of Hibernate to let the other portion of program be separated form direct operation on Hibernate and applying some other scheme to replace off Hibernate for realizing DAO if it is necessary.

Description

technical field [0001] The invention relates to the data persistence layer of modern enterprise application software, especially the realization method of the data access object mode based on the dynamic agent technology. Background technique [0002] Many real enterprise applications require the use of persistent data to some degree. For many applications, persistent storage is implemented using different mechanisms, and the APIs used to access these different persistent storage mechanisms vary widely. [0003] Data is the most important aspect of any computer application. At its core, a computer application enables someone or another computer system to access its data. In an enterprise environment, data must not only be accessible (that is, interfaced with a user interface and managed by a set of business rules), but also persistent. Persistent data storage is data storage that survives server crashes. Persistent data exists outside of the application's active memory, ...

AI Technical Summary

Problems solved by technology

Disadvantages of session bean / JDBC: complex implementation

[0032] As mentioned above, most modern enterprise application software needs the support of the database. In order to effectively encapsulate the data persistence process and provide clear access operation logic, the DAO (Data Access Object) mode is often used to shield the complex and variable data inventory during the development process. The DAO model is easy to understand and use, so it is very easy to apply in various projects, but it also has some disadvantages, that is, as the project grows, the number of required DAOs also increases rapidly, but each DAO internal The code is similar but not exactly the same, which results in a high repetition rate of the code. In addition, the DAO pattern requires an interface and an implementation class, so the large number of DAOs and the high repetition rate of the code cause developers to have Spend a lot of energy on DAO writing

Images