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Tag Archives: Spring

Synchronizing transactions with asynchronous events in Spring

spring-interview-questions-answers

Today as an example we will take a very simple scenario: placing an order stores it and sends an e-mail about that order:                   @Service class OrderService @Autowired() (orderDao: OrderDao, mailNotifier: OrderMailNotifier) { @Transactional def placeOrder(order: Order) { orderDao save order mailNotifier sendMail order } } So far so good, but e-mail ...

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Spring MVC Form Validation (With Annotations)

spring-interview-questions-answers

This post provides a simple example of a HTML form validation. It is based on the Spring MVC With Annotations example. The code is available on GitHub in the Spring-MVC-Form-Validation directory.                 Data For this example we will use a bean and JSR303 validation annotations: public class MyUser { @NotNull @Size(min=1,max=20) private String name; @Min(0) @Max(120) private ...

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Testing Spring Data Neo4j Applications with NoSQLUnit

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Spring Data Neo4j is the project within Spring Data project which provides an extension to the Spring programming model for writing applications that uses Neo4j as graph database. To write tests using NoSQLUnit for Spring Data Neo4j applications, you do need nothing special apart from considering that Spring Data Neo4j uses a special property called type in graph nodes and ...

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Migrating from Hibernate 3 to 4 with Spring integration

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This week it was time to upgrade our code base to the latest Hibernate 4.x. We postponed our migration (still being on Hibernate 3.3) since the newer maintenance releases of the 3.x branch required some API changes which were apparently still in flux. An example is the UserType API which was still showing flaws and was going to be finalized ...

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JavaFX 2 with Spring

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I’m going to start this one with a bold statement: I always liked Java Swing, or applets for that matter. There, I said it. If I perform some self analysis, this admiration probably started when I got introduced to Java. Swing was (practically) the first thing I ever did with Java that gave some statisfactionary result and made me able ...

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DeferredResult – asynchronous processing in Spring MVC

spring-interview-questions-answers

DeferredResult is a container for possibly not-yet-finished computation that will be available in future. Spring MVC uses it to represent asynchronous computation and take advantage of Servlet 3.0 AsyncContext asynchronous request handling. Just to give a quick impression how it works:               @RequestMapping("/") @ResponseBody public DeferredResult<String> square() throws JMSException { final DeferredResult<String> deferredResult = ...

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Customize Spring Social Connect Framework For MongoDB

spring-interview-questions-answers

In my previous post, I talked about the first challenge I had was to change the data model and add the connection framework. Here I want to give more details about how I did it. Spring Social project already provides a jdbc based connection repository implementation to persist user connection data into a relational database. However, I’m using MongoDB, so ...

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MongoDB: Add A Counter With Spring Data

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In my blog app, you can view any user’s profile, for example, my profile page will be http://www.jiwhiz.com/profile/user1, and ‘user1′ is my user Id in the system. In MongoDB, every document object will have a unique identifier, and often we store it as String, so I have a BaseEntity class for that:               @Document ...

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