Can you inject in produced object in CDI?

[ericjvandervelden]

Suppose I have,

    public class Ctrl{

            @Named @Produces public My getMy(){ return new My(); }

I can use EL expressions referencing `my`.. So that's OK.

But in the `My` type itself, I cannot inject, for example,

public class My

        @Inject @Random private int randomNumber;

The `randomNumber` field in `my` above is `null`.

So my question is: Can you indeed not inject in a produced object, or am I doing something wrong?

[mkouba]

Hi Eric,

a producer method is fully responsible for creating a new instance of a an object. In other words, the CDI container only takes the result of the producer method. However, a producer method may have any number of parameters and all those parameters are injection points.

So one way you could solve this:

@Named
@Produces
public My getMy(@Random int randomNumber){ return new My(randomNumber); }

The other way would be to use the CDI SPI to create an unmanaged instance. But I'm not so sure this makes much sense. I mean, what is the reason to use a producer then?

[ericjvandervelden]

Thank you very much.