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Tag Archives: Spring

HOW-TO: Custom error pages in Tomcat with Spring MVC

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Default Tomcat error pages look scary. In addition, they may expose valuable information including server version and exception stack trace. Servlet specification provides a way to configure an exceptional behavior through web.xml. One can configure either reaction on a specific Java exception or to a selected Http response code(s). error-page element specifies a mapping between an error code or exception ...

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Strategy Pattern ain’t meant for Spring!

spring-interview-questions-answers

Right, so lets say you’re writing a Spring MVC app and you decide, “I want to do seperate encapsulated algorithms that can be swapped to carry out a specific behaviour”. The classic response to this would be “you need the Strategy Pattern ma’ boy!”.  So, that’s what I did, consider the code below… Interface     public interface MealStrategy { ...

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Thymeleaf template layouts in Spring MVC application with no extensions

spring-interview-questions-answers

After some years with JSP/JSTL and Apache Tiles I started discovering Thymeleaf for my Spring MVC applications. Thymeleaf is a really great view engine and it simplifies and speeds up the development despite that lack of good IntelliJ (vote here: http://youtrack.jetbrains.com/issue/IDEABKL-6713) support at the moment (there is an Eclipse plugin though). While learning how to use Thymeleaf I investigated different ...

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Getting Started with method security in Grails using Spring Security

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This blog post will be about implementing method level security with security expressions in Grails using the Spring Security plugins. I assume you have some basic understanding of the Grails Spring Security Core plugin. Roles aren’t enough. When using the Spring Security Core plugin you typically start to configure which roles are required for accessing certain URLs. This configuration can ...

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Grails: Calling bean methods in Spring Security expressions

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Some days ago while working on a Grails application I was in a situation where a wanted to call a bean method from a Spring security SPEL expression. I was using the @PreAuthorize annotation from the Spring Security ACL plugin and wanted to do something like this:               @PreAuthorize("myService.canAccessUserProfile(#profileId)") public Profile getUserProfile(long profileId) {   ... } @PreAuthorize takes ...

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@ControllerAdvice improvements in Spring 4

spring-interview-questions-answers

Among many new features in Spring 4 I found @ControllerAdvice improvements. @ControllerAdvice is a specialization of a @Component that is used to define @ExceptionHandler, @InitBinder, and @ModelAttribute methods that apply to all @RequestMapping methods. Prior to Spring 4, @ControllerAdvice assisted all controllers in the same Dispatcher Servlet. With Spring 4 it has changed. As of Spring 4 @ControllerAdvice may be ...

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Type Conversion in Spring

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Here are few straight cases where we need type conversion: Case #1. To help simplifying bean configurations, Spring supports conversion of property values to and from text values. Each property editor is designed for a property of certain type only. And to put them in use, we have to register them with Spring container. Case #2. Also when using Spring ...

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Spring: Make your java-based configuration more elegant

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Hi everyone, I haven’t written new articles a long period of time. A lot of materials were accumulated which need to be posted in my blog in nearest future. But now I want to talk about Spring MVC application configurations. If to be more precisely, I want to talk about java based Spring configurations. Despite that Spring java based configuration ...

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