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The Spring Data JPA is an implementation of the repository abstraction that is a key building block of domain-driven design based on the Java application framework Spring. It transparently supports all available JPA implementations and supports CRUD operations as well as the convenient execution of database queries. [13]: 47 [14]
JPQL is used to make queries against entities stored in a relational database. It is heavily inspired by SQL, and its queries resemble SQL queries in syntax, [1]: 17, §1.3 but operate against JPA entity objects rather than directly with database tables. [1]: 26, §2.2.3
This allows a user to create a new software project via the Roo shell, or use Roo on an existing project. The following is an example of the commands used by Roo to create a new application plus the Spring Boot Maven plugin run goal to compile and run the application using an embedded HTTP server:
JPA, Hibernate JUnit, Selenium: Yes via Core Security module Yes Yes Server-side validation Spring: Java: Yes Yes Push Yes Hibernate, iBatis, more Mock objects, unit tests Spring Security (formerly Acegi) JSP, Commons Tiles, Velocity, Thymeleaf, more Ehcache, more Commons validator, Bean Validation: Stripes: Java Yes Yes Pull Yes JPA, Hibernate Yes
For example, an Album object may represent an entity; but the Tracks object associated with the Album objects would represent a component of the Album entity, if it is assumed that Tracks can only be saved or retrieved from the database through the Album object. Unlike J2EE, Hibernate can switch databases.
A JAXB Tutorial Archived 2013-03-23 at the Wayback Machine by Wolfgang Laun; JSR 222 (JAXB 2.0) JSR 31 (JAXB 1.0) The Java EE 5 Tutorial - Binding between XML Schema and Java Classes JAXB chapter of the Java EE 5 Tutorial; JAXB Wizard Archived 2012-05-31 at the Wayback Machine; JAXB Tutorials
The entity–control–boundary approach finds its origin in Ivar Jacobson's use-case–driven object-oriented software engineering (OOSE) method published in 1992. [1] [2] It was originally called entity–interface–control (EIC) but very quickly the term "boundary" replaced "interface" in order to avoid the potential confusion with object-oriented programming language terminology.
Apache Struts 2 is an open-source web application framework for developing Java EE web applications.It uses and extends the Java Servlet API to encourage developers to adopt a model–view–controller (MVC) architecture.