public async Task DoTransactionAsync(Func <CancellationToken, Task> txnAction, Action <Behavior> transactionBehaviorAction = default(Action <Behavior>), Action <SessionBehavior> sessionBehaviorAction = default(Action <SessionBehavior>), IClientSessionHandle parentSession = default(IClientSessionHandle), CancellationToken cancellationToken = default(CancellationToken))
{
var sessionBehavior = new SessionBehavior();
sessionBehaviorAction?.Invoke(sessionBehavior);
sessionBehavior = sessionBehaviorAction == null ? this.configurationSource.Model.SessionBehavior : default(SessionBehavior);
using (var session = await this.configurationSource.Source.StartSessionAsync(sessionBehavior.ToClientSessionOptions(), cancellationToken).ConfigureAwait(false))
{
try
{
this.clientSessionHandle = session;
var task = transactionRetryPolicy.ExecuteAsync((cToken) => RunTransactionAsync(txnAction, session, parentSession, transactionBehaviorAction, cToken), cancellationToken);
#if NETFULL
await task.ConfigureAwait(false);
#else
await task;
#endif
}
catch (Exception)
{
this.clientSessionHandle = default(IClientSessionHandle);
throw;
}
}
this.clientSessionHandle = default(IClientSessionHandle);
}
public static ClientSessionOptions ToClientSessionOptions(this SessionBehavior sessionBehavior)
{
if (sessionBehavior == null)
{
return(default(ClientSessionOptions));
}
return(new ClientSessionOptions
{
CausalConsistency = sessionBehavior.CasualConsistency,
DefaultTransactionOptions = new TransactionOptions(sessionBehavior.ReadConcern, sessionBehavior.ReadPreference, sessionBehavior.WriteConcern)
});
}
public async Task <IClientSessionHandle> BeginSessionAsync(Action <SessionBehavior> sessionBehaviorAction = default(Action <SessionBehavior>), CancellationToken cancellationToken = default(CancellationToken))
{
var sessionBehavior = new SessionBehavior();
sessionBehaviorAction?.Invoke(sessionBehavior);
sessionBehavior = sessionBehaviorAction == null ? this.configurationSource.Model.SessionBehavior : default(SessionBehavior);
var task = this.configurationSource.Source.StartSessionAsync(sessionBehavior.ToClientSessionOptions(), cancellationToken);
#if NETFULL
this.clientSessionHandle = await task.ConfigureAwait(false);
#else
this.clientSessionHandle = await task;
#endif
return(this.clientSessionHandle);
}
internal void ApplyDefaultBehavior()
{
if (_isDefaultDatabaseBehavior)
{
DatabaseBehavior = new Behavior
{
ReadPreference = ReadPreference.Secondary,
ReadConcern = ReadConcern.Linearizable,
WriteConcern = WriteConcern.WMajority
};
}
if (_isDefaultCollectionBehavior)
{
CollectionBehavior = new Behavior
{
ReadPreference = ReadPreference.Secondary,
ReadConcern = ReadConcern.Linearizable,
WriteConcern = WriteConcern.WMajority
};
}
if (_isDefaultSessionBehavior)
{
SessionBehavior = new SessionBehavior
{
CasualConsistency = true,
ReadPreference = ReadPreference.Primary,
ReadConcern = ReadConcern.Linearizable,
WriteConcern = WriteConcern.WMajority
};
}
if (_isDefaultTransactionBehavior)
{
TransactionBehavior = new Behavior
{
ReadPreference = ReadPreference.Primary,
ReadConcern = ReadConcern.Linearizable,
WriteConcern = WriteConcern.WMajority
};
}
_apply(this);
}
