private async Task <bool> UserExistsAsync(IChannelSourceHandle channelSource, CancellationToken cancellationToken)
{
try
{
var command = new BsonDocument("usersInfo", _username);
var operation = new ReadCommandOperation <BsonDocument>(_databaseNamespace, command, BsonDocumentSerializer.Instance, _messageEncoderSettings);
var result = await operation.ExecuteAsync(channelSource, ReadPreference.Primary, cancellationToken).ConfigureAwait(false);
BsonValue users;
if (result.TryGetValue("users", out users) && users.IsBsonArray && users.AsBsonArray.Count > 0)
{
return(true);
}
else
{
return(false);
}
}
catch (MongoCommandException ex)
{
if (ex.Code == 13)
{
return(false);
}
throw;
}
}
public static string GetStorageEngine()
{
using (var binding = GetReadWriteBinding())
{
var command = new BsonDocument("serverStatus", 1);
var operation = new ReadCommandOperation <BsonDocument>(DatabaseNamespace.Admin, command, BsonDocumentSerializer.Instance, __messageEncoderSettings);
var response = operation.ExecuteAsync(binding, CancellationToken.None).GetAwaiter().GetResult();
BsonValue storageEngine;
if (response.TryGetValue("storageEngine", out storageEngine) && storageEngine.AsBsonDocument.Contains("name"))
{
return(storageEngine["name"].AsString);
}
else
{
return("mmapv1");
}
}
}
public static IEnumerable <string> GetModules()
{
using (var binding = GetReadBinding())
{
var command = new BsonDocument("buildinfo", 1);
var operation = new ReadCommandOperation <BsonDocument>(DatabaseNamespace.Admin, command, BsonDocumentSerializer.Instance, __messageEncoderSettings);
var response = operation.ExecuteAsync(binding, CancellationToken.None).GetAwaiter().GetResult();
BsonValue modules;
if (response.TryGetValue("modules", out modules))
{
return(modules.AsBsonArray.Select(x => x.ToString()));
}
else
{
return(Enumerable.Empty <string>());
}
}
}
// methods
public async Task <IEnumerable <BsonDocument> > ExecuteAsync(IReadBinding binding, CancellationToken cancellationToken)
{
var filter = _username == null ? (BsonValue)1 : _username;
var command = new BsonDocument("usersInfo", filter);
var operation = new ReadCommandOperation <BsonDocument>(_databaseNamespace, command, BsonDocumentSerializer.Instance, _messageEncoderSettings);
var result = await operation.ExecuteAsync(binding, cancellationToken).ConfigureAwait(false);
BsonValue users;
if (result.TryGetValue("users", out users) && users.IsBsonArray)
{
return(users.AsBsonArray.Select(v => v.AsBsonDocument));
}
else
{
return(Enumerable.Empty <BsonDocument>());
}
}
public static string GetStorageEngine()
{
using (var binding = GetReadWriteBinding())
{
var command = new BsonDocument("serverStatus", 1);
var operation = new ReadCommandOperation<BsonDocument>(DatabaseNamespace.Admin, command, BsonDocumentSerializer.Instance, __messageEncoderSettings);
var response = operation.ExecuteAsync(binding, CancellationToken.None).GetAwaiter().GetResult();
BsonValue storageEngine;
if (response.TryGetValue("storageEngine", out storageEngine) && storageEngine.AsBsonDocument.Contains("name"))
{
return storageEngine["name"].AsString;
}
else
{
return "mmapv1";
}
}
}
private BsonDocument GetCollectionStats(IReadBinding binding, bool async)
{
var command = new BsonDocument
{
{ "collStats", _collectionNamespace.CollectionName }
};
var operation = new ReadCommandOperation<BsonDocument>(_collectionNamespace.DatabaseNamespace, command, BsonDocumentSerializer.Instance, _messageEncoderSettings);
if (async)
{
return operation.ExecuteAsync(binding, CancellationToken.None).GetAwaiter().GetResult();
}
else
{
return operation.Execute(binding, CancellationToken.None);
}
}
public Task<BsonDocument> GetCollectionStatsAsync(IReadBinding binding)
{
var command = new BsonDocument
{
{ "collStats", _collectionNamespace.CollectionName }
};
var operation = new ReadCommandOperation<BsonDocument>(_collectionNamespace.DatabaseNamespace, command, BsonDocumentSerializer.Instance, _messageEncoderSettings);
return operation.ExecuteAsync(binding, CancellationToken.None);
}
public static IEnumerable<string> GetModules()
{
using (var binding = GetReadBinding())
{
var command = new BsonDocument("buildinfo", 1);
var operation = new ReadCommandOperation<BsonDocument>(DatabaseNamespace.Admin, command, BsonDocumentSerializer.Instance, __messageEncoderSettings);
var response = operation.ExecuteAsync(binding, CancellationToken.None).GetAwaiter().GetResult();
BsonValue modules;
if (response.TryGetValue("modules", out modules))
{
return modules.AsBsonArray.Select(x => x.ToString());
}
else
{
return Enumerable.Empty<string>();
}
}
}
