@SuppressWarnings("boxing")
@Override
public <T> Subscription<T> open(
Class<T> clazz, final long id, final SubscriptionConnectionOptions options, String database)
throws SubscriptionException {
if (options == null) {
throw new IllegalArgumentException("Cannot open a subscription if options are null");
}
if (options.getBatchOptions() == null) {
throw new IllegalArgumentException("Cannot open a subscription if batch options are null");
}
if (options.getBatchOptions().getMaxSize() != null
&& options.getBatchOptions().getMaxSize() < 16 * 1024) {
throw new IllegalArgumentException(
"Max size value of batch options cannot be lower than that 16 KB");
}
final IDatabaseCommands commands =
database == null
? documentStore.getDatabaseCommands()
: documentStore.getDatabaseCommands().forDatabase(database);
boolean open = true;
try {
sendOpenSubscriptionRequest(commands, id, options);
} catch (SubscriptionException subscriptionException) {
if (options.getStrategy() != SubscriptionOpeningStrategy.WAIT_FOR_FREE
|| !(subscriptionException instanceof SubscriptionInUseException)) {
throw subscriptionException;
}
open = false;
}
Subscription<T> subscription =
new Subscription<>(
clazz,
id,
Lang.coalesce(database, MultiDatabase.getDatabaseName(documentStore.getUrl())),
options,
commands,
documentStore.changes(database),
documentStore.getConventions(),
open,
new Action0() {
@SuppressWarnings("synthetic-access")
@Override
public void apply() {
sendOpenSubscriptionRequest(
commands, id,
options); // to ensure that subscription is open try to call it with the same
// connection id
}
});
subscriptions.add(subscription);
return subscription;
}
@SuppressWarnings("boxing")
private static void sendOpenSubscriptionRequest(
IDatabaseCommands commands, long id, SubscriptionConnectionOptions options)
throws SubscriptionException {
try (HttpJsonRequest request =
commands.createRequest(
HttpMethods.POST,
String.format(
"/subscriptions/open?id=%d&connection=%s", id, options.getConnectionId()))) {
request.write(options.toRavenObject().toString());
request.executeRequest();
} catch (Exception e) {
SubscriptionException subscriptionException = tryGetSubscriptionException(e);
if (subscriptionException != null) {
throw subscriptionException;
}
throw e;
}
}