Personally, I like number three best, but as an alternative, you can wrap number three in some syntactic sugar:

sub transaction(&$$) {
    my ($cb, $self,$timeout) = @_;
    $self->do_sub_with_timeout( $cb, $timeout );
};

transaction {
    $deployer->extend_order_lease( $order, $end_date ); 
} $self, $timeout;

[download]

Unfortunately, the & prototype must come as the first argument. I'm also not convinced that this style is less confusing/more readable than the other.

In reply to Re: Style - how to give class method call as parameter by Corion
in thread Style - how to give class method call as parameter by strat

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