Perl/OOP: How to create object of "Class B" in constructor of "Class A"

Question

I have Class A with following constructor:

sub new {
    my ($class, %args) = @_;

    return bless(\%args, $class);
}

I have another class, LWP::UserAgent, which I want to use in my Class A. I could solve the problem by doing this:

ua = LWP::UserAgent->new;

sub new {
    my ($class, %args) = @_;

    return bless(\%args, $class);
}

But in this case I will have 1 object of UserAgent, but I want a unique object for each instance of my Class A.

Answer 1

Then you need to construct that object as an attribute

use LWP::UserAgent;

sub new {
    my ($class, %args) = @_;

    return bless { %args, lwp => LWP::UserAgent->new }, $class;
}

and now every object of class A will have for attribute lwp its own LWP::UserAgent object.

I would of course expect that in reality this is written out nicely with all requisite error checking.

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And I guess better call the attribute ua (instead of lwp above), for User-Agent.