public async Task <ConfigBackupRecord> GetConfigs()
{
if (!createConnection())
{
// if connection fails
return(null);
}
String serviceAddr = NetworkInterface.
GetAllNetworkInterfaces()
.Where(nic => nic.OperationalStatus == OperationalStatus.Up &&
nic.NetworkInterfaceType != NetworkInterfaceType.Loopback)
.Select(nic => nic.GetPhysicalAddress()
.ToString())
.FirstOrDefault();
var collection = database
.GetCollection <ConfigBackupRecord>(config.configBackupCollection);
IAsyncCursor <ConfigBackupRecord> dbCursor = await collection
.FindAsync(r => r.serviceId == serviceAddr);
// await dbCursor.AnyAsync<ConfigBackupRecord>()
// cursor.FirstAsync() called after prev. line will throw
// invalid operation exception: Cannot access a disposed object
if (dbCursor != null)
{
try
{
var record = await dbCursor.FirstAsync <ConfigBackupRecord>();
return(record);
}
catch (InvalidOperationException)
{
// most likely sequence contains no elements
return(new ConfigBackupRecord(serviceAddr,
new List <DatedConfigRecord>()));
}
catch (TimeoutException)
{
Console.WriteLine($"Failed to connect with the database on: "
+ $"{config.dbAddress} ... ");
return(null);
}
}
return(null);
}
/// <summary>
/// Looks up the <see cref="CommandDocument"/> for the given command.
/// </summary>
/// <param name="channelId">The channelId the command is registered to.</param>
/// <param name="command">The command to lookup.</param>
/// <returns>The <see cref="CommandDocument"/> for the command, if it exists; <c>null</c> otherwise.</returns>
public static async Task <CommandDocument> GetCustomCommandAsync(string channelId, string command)
{
IMongoCollection <CommandDocument> collection = DatabaseClient.Instance.MongoDatabase.GetCollection <CommandDocument>(CommandDocument.CollectionName);
FilterDefinition <CommandDocument> filter = Builders <CommandDocument> .Filter.Where(c => c.ChannelId == channelId && !c.IsWhisperCommand && c.Command == command.ToLowerInvariant());
if (await collection.CountDocumentsAsync(filter).ConfigureAwait(false) == 0)
{
return(null);
}
using IAsyncCursor <CommandDocument> cursor = await collection.FindAsync(filter).ConfigureAwait(false);
return(await cursor.FirstAsync().ConfigureAwait(false));
}