| GraphQL::AsyncIterator(3pm) | User Contributed Perl Documentation | GraphQL::AsyncIterator(3pm) |
GraphQL::AsyncIterator - iterator objects that return promise to next result
use GraphQL::AsyncIterator;
my $i = GraphQL::AsyncIterator->new(
promise_code => $pc,
);
# also works when publish happens before next_p called
my $promised_value = $i->next_p;
$i->publish('hi'); # now $promised_value will be fulfilled
$i->close_tap; # now next_p will return undef
Encapsulates the asynchronous event-handling needed for the publish/subscribe behaviour needed by GraphQL::Subscription.
A hash-ref matching "PromiseCode" in GraphQL::Type::Library, which must provide the "new" key.
Resolves the relevant promise with @values.
Rejects the relevant promise with @values.
Returns either a "Promise" in GraphQL::Type::Library of the next value, or "undef" when closed off. Do not call this if a previous promised next value has not been settled, as a queue is not maintained.
The promise will have each of the sets of handlers added by "map_then" appended.
Switch to being closed off. "next_p" will return "undef" as soon as it runs out of "publish"ed values. "publish" will throw an exception. NB This will not cause the settling of any outstanding promise returned by "next_p".
Adds the handlers to this object's list of handlers, which will be attached to promises returned by "next_p". Returns self.
| 2022-03-27 | perl v5.34.0 |