@Override
public CNSSubscription confirmSubscription(
boolean authenticateOnUnsubscribe, String token, String topicArn) throws Exception {
// get Sub-arn given token
CmbColumnSlice<String, String> slice =
cassandraHandler.readColumnSlice(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilySubscriptionsTokenIndex,
token,
null,
null,
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
if (slice == null) {
throw new CMBException(CMBErrorCodes.NotFound, "Resource not found.");
}
// get Column from main table
String subArn = slice.getColumns().get(0).getName();
// get Subscription given subArn
final CNSSubscription s = getSubscription(subArn);
if (s == null) {
throw new SubscriberNotFoundException(
"Could not find subscription given subscription arn " + subArn);
}
s.setAuthenticateOnUnsubscribe(authenticateOnUnsubscribe);
s.setConfirmed(true);
s.setConfirmDate(new Date());
// re-insert with no TTL. will clobber the old one which had ttl
insertOrUpdateSubsAndIndexes(s, null);
cassandraHandler.decrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
s.getTopicArn(),
"subscriptionPending",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
cassandraHandler.incrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
s.getTopicArn(),
"subscriptionConfirmed",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
return s;
}
@Override
public void unsubscribe(String arn) throws Exception {
CNSSubscription s = getSubscription(arn);
if (s != null) {
deleteIndexes(arn, s.getUserId(), s.getToken());
CmbComposite columnName =
cassandraHandler.getCmbComposite(s.getEndpoint(), s.getProtocol().name());
cassandraHandler.delete(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilySubscriptions,
Util.getCnsTopicArn(arn),
columnName,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.COMPOSITE_SERIALIZER);
if (s.isConfirmed()) {
cassandraHandler.decrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
s.getTopicArn(),
"subscriptionConfirmed",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
} else {
cassandraHandler.decrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
s.getTopicArn(),
"subscriptionPending",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
}
cassandraHandler.incrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
s.getTopicArn(),
"subscriptionDeleted",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
}
}
@Override
public void unsubscribeAll(String topicArn) throws Exception {
int pageSize = 1000;
String nextToken = null;
List<CNSSubscription> subs =
listSubscriptionsByTopic(nextToken, topicArn, null, pageSize, false);
// Note: for pagination to work we need the nextToken's corresponding sub to not be deleted.
CNSSubscription nextTokenSub = null;
while (subs.size() > 0) {
// if retrieve subscription is less than page size, delete all index.
if (subs.size() < pageSize) {
deleteIndexesAll(subs);
break;
} else {
// keep the last subscription for pagination purpose.
nextTokenSub = subs.get(subs.size() - 1);
nextToken = nextTokenSub.getArn();
subs.remove(subs.size() - 1);
deleteIndexesAll(subs);
subs = listSubscriptionsByTopic(nextToken, topicArn, null, pageSize, false);
deleteIndexes(nextTokenSub.getArn(), nextTokenSub.getUserId(), nextTokenSub.getToken());
}
}
// int subscriptionConfirmedNum = (int)cassandraHandler.getCounter(CNS_KEYSPACE,
// columnFamilyTopicStats, topicArn, "subscriptionConfirmed", CMB_SERIALIZER.STRING_SERIALIZER,
// CMB_SERIALIZER.STRING_SERIALIZER);
// int subscriptionPendingNum = (int)cassandraHandler.getCounter(CNS_KEYSPACE,
// columnFamilyTopicStats, topicArn, "subscriptionPending", CMB_SERIALIZER.STRING_SERIALIZER,
// CMB_SERIALIZER.STRING_SERIALIZER);
cassandraHandler.incrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
topicArn,
"subscriptionDeleted",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
cassandraHandler.decrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
topicArn,
"subscriptionConfirmed",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
cassandraHandler.decrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
topicArn,
"subscriptionPending",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
cassandraHandler.delete(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilySubscriptions,
topicArn,
null,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
}
@Override
public CNSSubscription subscribe(
String endpoint, CnsSubscriptionProtocol protocol, String topicArn, String userId)
throws Exception {
// subscription is unique by protocol + endpoint + topic
final CNSSubscription subscription = new CNSSubscription(endpoint, protocol, topicArn, userId);
CNSTopic t = PersistenceFactory.getTopicPersistence().getTopic(topicArn);
if (t == null) {
throw new TopicNotFoundException("Resource not found.");
}
// check if queue exists for cqs endpoints
if (protocol.equals(CnsSubscriptionProtocol.cqs)) {
CQSQueue queue =
PersistenceFactory.getQueuePersistence()
.getQueue(com.comcast.cqs.util.Util.getRelativeQueueUrlForArn(endpoint));
if (queue == null) {
throw new CMBException(
CMBErrorCodes.NotFound, "Queue with arn " + endpoint + " does not exist.");
}
}
subscription.setArn(Util.generateCnsTopicSubscriptionArn(topicArn, protocol, endpoint));
// attempt to delete existing subscription
/*Composite superColumnName = new Composite(subscription.getEndpoint(), subscription.getProtocol().name());
HSuperColumn<Composite, String, String> superCol = readColumnFromSuperColumnFamily(columnFamilySubscriptions, subscription.getTopicArn(), superColumnName, new StringSerializer(), new CompositeSerializer(), StringSerializer.get(), StringSerializer.get(), CMBProperties.getInstance().getReadConsistencyLevel());
if (superCol != null) {
CNSSubscription exisitingSub = extractSubscriptionFromSuperColumn(superCol, topicArn);
deleteIndexes(exisitingSub.getArn(), exisitingSub.getUserId(), exisitingSub.getToken());
deleteSuperColumn(subscriptionsTemplate, exisitingSub.getTopicArn(), superColumnName);
}*/
// then set confirmation stuff and update cassandra
CNSSubscription retrievedSubscription = getSubscription(subscription.getArn());
if (!CMBProperties.getInstance().getCNSRequireSubscriptionConfirmation()) {
subscription.setConfirmed(true);
subscription.setConfirmDate(new Date());
insertOrUpdateSubsAndIndexes(subscription, null);
if (retrievedSubscription == null) {
cassandraHandler.incrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
subscription.getTopicArn(),
"subscriptionConfirmed",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
}
} else {
// protocols that cannot confirm subscriptions (e.g. redisPubSub)
// get an automatic confirmation here
if (!protocol.canConfirmSubscription()) {
subscription.setConfirmed(true);
subscription.setConfirmDate(new Date());
insertOrUpdateSubsAndIndexes(subscription, null);
// auto confirm subscription to cqs queue by owner
} else if (protocol.equals(CnsSubscriptionProtocol.cqs)) {
String queueOwner = com.comcast.cqs.util.Util.getQueueOwnerFromArn(endpoint);
if (queueOwner != null && queueOwner.equals(userId)) {
subscription.setConfirmed(true);
subscription.setConfirmDate(new Date());
insertOrUpdateSubsAndIndexes(subscription, null);
if (retrievedSubscription == null) {
cassandraHandler.incrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
subscription.getTopicArn(),
"subscriptionConfirmed",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
}
} else {
// use cassandra ttl to implement expiration after 3 days
insertOrUpdateSubsAndIndexes(subscription, 3 * 24 * 60 * 60);
if (retrievedSubscription == null) {
cassandraHandler.incrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
subscription.getTopicArn(),
"subscriptionPending",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
}
}
} else {
// use cassandra ttl to implement expiration after 3 days
insertOrUpdateSubsAndIndexes(subscription, 3 * 24 * 60 * 60);
if (retrievedSubscription == null) {
cassandraHandler.incrementCounter(
AbstractDurablePersistence.CNS_KEYSPACE,
columnFamilyTopicStats,
subscription.getTopicArn(),
"subscriptionPending",
1,
CMB_SERIALIZER.STRING_SERIALIZER,
CMB_SERIALIZER.STRING_SERIALIZER);
}
}
}
CNSSubscriptionAttributes attributes =
new CNSSubscriptionAttributes(topicArn, subscription.getArn(), userId);
PersistenceFactory.getCNSAttributePersistence()
.setSubscriptionAttributes(attributes, subscription.getArn());
return subscription;
}
