Declarabes in Spring application using Rabbit MQ - spring-rabbit

Question

I am using spring aqmp version 2.2.6 to create multiple binding to a topic exchange.
I understand from the discussion and the reference document that i can use declarables .Spring AMQP: Creating multiple queues dynamically
But in my case i will have the routing keys in the application config as comma seperated and ever growing .
How would i use the config to create the declarable bean dynamically. ?
below is application config entry.
rabbit.MQ_SUBSCRIBER_ROUTING_KEY = my.#,test.#
The routing key will be added as in when required by service .
Shoud i loop the rabbit.MQ_SUBSCRIBER_ROUTING_KEY and call bean function ?

Answer 1

my.queues=foo,bar,baz
Spring can convert that to a List<String>.
#Bean
public Declarables queues(#Value("${my.queues}") List<String> queues) {
return new Declarables(queues
.stream()
.map(q -> new Queue(q))
.collect(Collectors.toList())
.toArray(new Queue[0]));
}
EDIT
For the complete picture:
#Bean
public Declarables declarables(#Value("${my.queues}") List<String> queues,
#Value("${my.exchange}") String exch,
#Value("${my.routing.keys}") List<String> routingKeys) {
List<Declarable> declarables = queues
.stream()
.map(q -> new Queue(q))
.collect(Collectors.toList());
declarables.add(new DirectExchange(exch));
for (int i = 0; i < routingKeys.size(); i++) {
declarables.add(new Binding(queues.get(i), DestinationType.QUEUE, exch,
routingKeys.get(i), null));
}
return new Declarables(declarables
.toArray(new Declarable[0]));
}
my.queues=foo,bar,baz
my.exchange=qux
my.routing.keys=rk1,rk2,rk3