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Testing Spring “session” scope
In a Spring based Web application, beans can be scoped to the user “session”. This essentially means that state changes to the session scoped bean are only visible in the ...
Spring Integration File Polling and Tests
I recently implemented a small project where we had to poll a folder for new files and then trigger a service flow on the contents of the file. Spring Integration is a great fit for ...
Spring Bean names
Spring bean names are straightforward, except for cases where names are not explicitly specified. To start with, Spring bean names for an xml based bean definition is specified this ...
Spring Data JPA and pagination
Let us start with the classic JPA way to support pagination. Consider a simple domain class – A ‘Member’ with attributes first name, last name. To support pagination ...
Mixin in Java with Aspects – for a Scala traits sample
Scala traits allow new behaviors to be mixed into a class. Consider two traits to add auditing and version related fields to JPA entities: package ...
Spring Property Placeholder Configurer – A few not so obvious options
Spring’s PropertySourcesPlaceholderConfigurer is used for externalizing properties from the Spring bean definitions defined in XML or using Java Config. There are a few options ...
Spring MVC – Customizing RequestMappingHandlerMapping
When Spring MVC is configured using <mvc:annotation-driven/> in an xml bean definition file, internally a component called RequestMappingHandlerMapping gets registered with Spring ...
JUnit test method ordering
Junit until version 4.10 uses the order of test methods in a test class as returned by the reflection API as the order of test method execution - Class.getMethods(). To quote the Javadoc ...
Json deserialization with Jackson and Super type tokens
Datatables is a jquery plugin to present tabular information – it can enhance a simple table or can use a AJAX based data and present the information in a tabular form. Datatables ...
Composing Java annotations
The allowed attribute types of a Java annotations are deliberately very restrictive, however some clean composite annotation types are possible with the allowed types. Consider ...
