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Tag Archives: Spring

Spring Batch as Wildfly Module

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For a long time, the Java EE specification was lacking a Batch Processing API. Today, this is an essential necessity for enterprise applications. This was finally fixed with the JSR-352 Batch Applications for the Java Platform now available in Java EE 7. The JSR-352 got it’s inspiration from the Spring Batch counterpart. Both cover the same concepts, although the resulting ...

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Spring 4.1 and Java 8: java.util.Optional

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As of Spring 4.1 Java 8’s java.util.Optional, a container object which may or may not contain a non-null value, is supported with @RequestParam, @RequestHeader and @MatrixVariable. While using Java 8’s java.util.Optional you make sure your parameters are never null.     Request Params In this example we will bind java.time.LocalDate as java.util.Optional using @RequestParam: @RestController @RequestMapping("o") public class SampleController { ...

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How to compose html emails in Java with Spring and Velocity

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In this post I will present how you can format and send automatic emails with Spring and Velocity. Spring offers alone the capability to create simple text emails, which is fine for simple cases, but in typical enterprise application you wouldn’t want to do that for a number of reasons: creating HTML-based email content in Java code is tedious and ...

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Spring, REST, Ajax and CORS

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Assuming you’re working on a project based on JavaScript for the client side and who makes ajax requests to a server through rest web services, you may encounter some troubles especially if both sides are on a separate domain. Indeed, for security reasons, ajax requests from one domain A to a different domain B are not authorized. Fortunately, the W3C ...

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Common mistakes when using Spring MVC

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 When I started my career around 10 years ago, Struts MVC was the norm in the market. However, over the years, I observed the Spring MVC slowly gaining popularity. This is not a surprise to me, given the seamless integration of Spring MVC with Spring container and the flexibility and extensibility that it offers. From my journey with Spring so ...

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SpringBoot: Introducing SpringBoot

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SpringBoot…there is a lot of buzz about SpringBoot nowadays. So what is SpringBoot? SpringBoot is a new spring portfolio project which takes opinionated view of building production-ready Spring applications by drastically reducing the amount of configuration required. Spring Boot is taking the convention over configuration style to the next level by registering the default configurations automatically based on the classpath ...

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Spring 4: CGLIB-based proxy classes with no default constructor

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In Spring, if the class of a target object that is to be proxied doesn’t implement any interfaces, then a CGLIB-based proxy will be created. Prior to Spring 4, CGLIB-based proxy classes require a default constructor. And this is not the limitation of CGLIB library, but Spring itself. Fortunately, as of Spring 4 this is no longer an issue. CGLIB-based ...

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