how to check dependencies are injected in spring bean properly or not?

[sree hareesh]

Hi all

how to check all dependencies are injected in spring bean properly or not?

Thanks in advance

[Tim Cooke]

Obvious way is to manually test it at runtime. Any dependencies that are not set will throw a NullPointerException.

Another, and more robust, way is to annotate the setter method in your class with Spring's @Required annotation. This will produce an explicit Warning in your StdErr output stating that a required dependency has not been provided.

[Saifuddin Merchant]

A spring bean can also implement the InitializingBean.html http://static.springsource.org/spring/docs/2.5.x/api/org/springframework/beans/factory/InitializingBean.html

From the javadoc:
Interface to be implemented by beans that need to react once all their properties have been set by a BeanFactory: for example, to perform custom initialization, or merely to check that all mandatory properties have been set.

many of springs in-build classes use it to check if mandatory properties are set