Question

I’m trying to instanciate a bean which constructor could throw an Exception.
I can’t modify this class (given by an external team).

<bean id="myClass" class="myClass" />

The myClass constructor throws Exception.

I’ve been thinking about extending this class with a Singleton Pattern which is the behavior I want (be sure to instantiate only one instance of MyClass).

Error message :

nested exception is
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name
‘myClass’
defined in class path resource
[…/spring_applicationContext.xml]:
Instantiation of bean failed; nested exception is
org.springframework.beans.BeanInstantiationException: Could not
instantiate bean class
[myClass]:
Constructor threw exception; nested exception is
java.lang.ExceptionInInitializerError

Thanks in advance for your answers

I think the problem comes from the fact that my constructor throws an Exception.

My question is : with Spring, is it possible to instanciate a bean with a constructor which could throw an exception ?

Answer 1

If no bean scope is specified in bean configuration file, default to singleton. Your bean myClass is a singleton and you dont need to do anything more.
Spring Doc