public MongoDbExtension(ExtendedActorSystem system)
{
if (system == null)
{
throw new ArgumentNullException("system");
}
// Initialize fallback configuration defaults
system.Settings.InjectTopLevelFallback(MongoDbPersistence.DefaultConfig());
// Read config
var journalConfig = system.Settings.Config.GetConfig("akka.persistence.journal.mongodb");
JournalSettings = new MongoDbJournalSettings(journalConfig);
var snapshotConfig = system.Settings.Config.GetConfig("akka.persistence.snapshot-store.mongodb");
SnapshotStoreSettings = new MongoDbSnapshotSettings(snapshotConfig);
// Create collections
var connectionString = new MongoUrl(JournalSettings.ConnectionString);
var client = new MongoClient(connectionString);
var journalDatabase = client.GetDatabase(connectionString.DatabaseName);
JournalCollection = journalDatabase.GetCollection <JournalEntry>(JournalSettings.Collection);
JournalCollection.Indexes.CreateOneAsync(
Builders <JournalEntry> .IndexKeys.Ascending(entry => entry.PersistenceId)
.Descending(entry => entry.SequenceNr)).Wait();
var snapshotDatabase = journalDatabase;
// We only need another client if the connection strings aren't equal,
// because the MongoClient uses the same connection pool for all instances which have the same connection string
if (!JournalSettings.ConnectionString.Equals(SnapshotStoreSettings.ConnectionString))
{
connectionString = new MongoUrl(SnapshotStoreSettings.ConnectionString);
client = new MongoClient(connectionString);
snapshotDatabase = client.GetDatabase(connectionString.DatabaseName);
}
SnapshotCollection = snapshotDatabase.GetCollection <SnapshotEntry>(SnapshotStoreSettings.Collection);
SnapshotCollection.Indexes.CreateOneAsync(
Builders <SnapshotEntry> .IndexKeys.Ascending(entry => entry.PersistenceId)
.Descending(entry => entry.SequenceNr)).Wait();
}
