public static async Task <FdbSystemStatus> GetStatusAsync([NotNull] IFdbReadOnlyTransaction trans)
{
Contract.NotNull(trans, nameof(trans));
Slice data = await trans.GetAsync(StatusJsonKey).ConfigureAwait(false);
if (data.IsNullOrEmpty)
{
return(null);
}
string jsonText = data.ToUnicode();
var doc = TinyJsonParser.ParseObject(jsonText);
if (doc == null)
{
return(null);
}
long rv = 0;
if (doc.ContainsKey("cluster"))
{
rv = await trans.GetReadVersionAsync();
}
return(new FdbSystemStatus(doc, rv, jsonText));
}
public static async Task <FdbSystemStatus?> GetStatusAsync(IFdbReadOnlyTransaction trans)
{
Contract.NotNull(trans);
var data = await trans.GetAsync(StatusJsonKey).ConfigureAwait(false);
if (data.IsNullOrEmpty)
{
return(null);
}
var doc = TinyJsonParser.ParseObject(data);
if (doc == null)
{
return(null);
}
long rv = 0;
if (doc.ContainsKey("cluster"))
{
rv = await trans.GetReadVersionAsync();
}
return(new FdbSystemStatus(doc, rv, data));
}
public static async Task <List <Slice> > GetBoundaryKeysAsync([NotNull] IFdbReadOnlyTransaction trans, Slice beginInclusive, Slice endExclusive)
{
Contract.NotNull(trans, nameof(trans));
Contract.Requires(trans.Context?.Database != null);
using (var shadow = trans.Context.Database.BeginReadOnlyTransaction(trans.Cancellation))
{
// We don't want to change the state of the transaction, so we will create another one at the same read version
var readVersion = await trans.GetReadVersionAsync().ConfigureAwait(false);
shadow.SetReadVersion(readVersion);
//TODO: we may need to also copy options like RetryLimit and Timeout ?
return(await GetBoundaryKeysInternalAsync(shadow, beginInclusive, endExclusive).ConfigureAwait(false));
}
}
public virtual Task <long> GetReadVersionAsync()
{
return(m_transaction.GetReadVersionAsync());
}