|
public static FutureGetDatabase ( |
||
| future | ||
| database | ||
| return | FdbError | |
public Task <IFdbDatabaseHandler> OpenDatabaseAsync(string databaseName, CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return(Task.FromCanceled <IFdbDatabaseHandler>(cancellationToken));
}
var future = FdbNative.ClusterCreateDatabase(m_handle, databaseName);
return(FdbFuture.CreateTaskFromHandle(
future,
(h) =>
{
DatabaseHandle database;
var err = FdbNative.FutureGetDatabase(h, out database);
if (err != FdbError.Success)
{
database.Dispose();
throw Fdb.MapToException(err);
}
var handler = new FdbNativeDatabase(database);
return (IFdbDatabaseHandler)handler;
},
cancellationToken
));
}
private static async ValueTask <IFdbDatabaseHandler> CreateDatabaseLegacyAsync(string?clusterFile, CancellationToken ct)
{
// In legacy API versions, you first had to create "cluster" handle and then obtain a database handle that that cluster.
// The API is async, but the future always completed inline...
ClusterHandle? cluster = null;
DatabaseHandle?database = null;
try
{
cluster = await FdbFuture.CreateTaskFromHandle(
FdbNative.CreateCluster(clusterFile),
h =>
{
var err = FdbNative.FutureGetCluster(h, out var handle);
if (Fdb.Failed(err))
{
throw Fdb.MapToException(err) !;
}
return(handle);
},
ct).ConfigureAwait(false);
database = await FdbFuture.CreateTaskFromHandle(
FdbNative.ClusterCreateDatabase(cluster, "DB"),
h =>
{
var err = FdbNative.FutureGetDatabase(h, out var handle);
if (Fdb.Failed(err))
{
throw Fdb.MapToException(err) !;
}
return(handle);
},
ct).ConfigureAwait(false);
return(new FdbNativeDatabase(database, clusterFile, cluster));
}
catch (Exception)
{
database?.Dispose();
cluster?.Dispose();
throw;
}
}