In my last blog post I introduced the basic feature set of Spring Data JPA. In this post I'd like to dive into some more features and how they can help you simplify data access layer implementation even further. The Spring Data repository abstraction consists of an interface based programming model, some factory classes and a Spring namespace to easily configure the infrastructure. A typical repository interface looks something like this:

public interface CustomerRepository extends JpaRepository<Customer, Long> {

  Customer findByEmailAddress(String emailAddress);

  List<Customer…

Dear Spring Community,

we are pleased to announce that the second milestone release of the Spring Data JPA project is now available! The release includes:

• Support for Querydsl predicates and thus type-safe JPA queries
• Validation of @Query annotated queries at bootstrap time
• Support for XML based entity mapping
• Support for Distinct, In and NotIn keywords in query methods
• Ported Hades extensions into Spring Data Commons core
• Various bugfixes.

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-jpa</artifactId>
    <version>1.0.0.M2</version>
</dependency>

<repository>
    <id>org.springframework.maven.milestone</id>
    <name>Spring Maven Milestone Repository</name>
    <url>http://maven.springframework.org/milestone</url>
</repository>

Download | JavaDocs | Reference documentation (HTML) | Reference documentation (PDF) | Changelog

Looking forward to your feedback in the forums or the issuetracker.

Dear Spring Community,

we are pleased to announce that the first milestone release of the Spring Data JPA project is now available! The release includes:

• Merge of the Hades open-source library into Spring Data
• Sophisticated support to build repositories based on Spring and JPA
• Transparent auditing of domain class
• Pagination support, dynamic query execution, ability to integrate custom data access code

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-jpa</artifactId>
    <version>1.0.0.M1</version>
</dependency>

<repository>
    <id>org.springframework.maven.milestone</id>
    <name>Spring Maven Milestone Repository</name>
    <url>http://maven.springframework.org/milestone</url>
</repository>

Download | JavaDocs | Reference documentation (HTML) | Reference documentation (PDF) | Changelog

There are also two sample projects to play with on GitHub.

Looking forward to your feedback in the forums or the issuetracker.

As we have just released the first milestone of the Spring Data JPA project I’d like to give you a quick introduction into its features. As you probably know, the Spring framework provides support to build a JPA based data access layer. So what does Spring Data JPA add to this base support? To answer that question I'd like to start with the data access components for a sample domain implemented using plain JPA + Spring and point out areas that leave room for improvement. After we've done that I will refactor the implementations to use the Spring Data JPA features to address these problem…