spring bean with dynamic constructor value

Question

I need to create an Object which is in-complete without the constructor argument. Something like this

Class A  {
  private final int timeOut
  public A(int t         


        

Answer 1

Two options spring (no pun intended) to mind:

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1. create a timeout factory, and use that as the constructor parameter. You can create a bean which implements FactoryBean, and it's job is to create other beans. So if you had something that generates salt's for encryption, you could have it return from getObject() a EncryptionSalt object. In your case you're wanting to generate Integers.

Here is an example: http://www.java2s.com/Code/Java/Spring/SpringFactoryBeanDemo.htm

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2. create a timeout bean that wraps an int that's dynamically set, and leave that in the "prototype" state so it's created each time Instead of going to the hassle of creating a factory, the EncryptionSalt object could just be declared as a prototype bean, so when it's injected a new object is created each time. Place the logic into the constructor or somewhere else.

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It somewhat depends what value you want the timeout to actually be.