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I write articles especially for Java, Python and Asp. Doctrine does NEVER touch the public API of methods in your entityclasses (like getters and setters) nor the constructor method.Then follow eithr4 of these two techniques depending on your requirement. For each change they may or may not increase based on persistence provider implementation.Johnny Morgan as a technical writer at Aegis Infoways, leading Java Development India since more than 6 years.This post explains the JPA technology and its use in java development. If a framework has to say ORM then it should implement all the specifications given by JPA. Technologies: JPA and Hibernate, Maven, My Sql database Usecase: If you are working on Java development applications with JPA, hibernate, eclipse link you will be getting below exception often: The problem is a JPA persistence provider is trying to update the Object which is not the latest version object.Experts of java development India are explaining the use case of technologies- JPA and Hibernate, My Sql database, Maven. Technology: JPA stands for the Java Persistence API which is the standard from Sun Micro Systems for persistence. JPA is just specification, it needs persistence provide for CRUD operations. Generally relational databases maintain version whenever a record is updated in the table.You can walk all the associations inside your entity models as deep as you want.Take the following example of a single instance with id 1 executing a single SELECT statement against the articles table in the database.
Only if you access these proxies for the first time they will go through the Entity Manager and load their state from the database.If you want to update the record in the table you should take the latest version record from the database and update it.As we are using ORM we should take the last version object and merge it. We can save, update and delete the data in database.The life cycle of entities are managed in persistence context.