private async Task <RangeValue> GetNextMaxAsyncInner(IAsyncDatabaseCommands databaseCommands)
{
var minNextMax = Range.Max;
using (databaseCommands.ForceReadFromMaster())
while (true)
{
try
{
ConflictException ce = null;
JsonDocument document;
try
{
document = await GetDocumentAsync(databaseCommands).ConfigureAwait(false);
}
catch (ConflictException e)
{
ce = e;
document = null;
}
if (ce != null)
{
return(await HandleConflictsAsync(databaseCommands, ce, minNextMax).ConfigureAwait(false));
}
long min, max;
if (document == null)
{
min = minNextMax + 1;
max = minNextMax + capacity;
document = new JsonDocument
{
Etag = Etag.Empty,
// sending empty etag means - ensure the that the document does NOT exists
Metadata = new RavenJObject(),
DataAsJson = RavenJObject.FromObject(new { Max = max }),
Key = HiLoDocumentKey
};
}
else
{
var oldMax = GetMaxFromDocument(document, minNextMax);
min = oldMax + 1;
max = oldMax + capacity;
document.DataAsJson["Max"] = max;
}
await PutDocumentAsync(databaseCommands, document).ConfigureAwait(false);
return(new RangeValue(min, max));
}
catch (ConcurrencyException)
{
//expected & ignored, will retry this
}
}
}
private static IAsyncDatabaseCommands SetupCommandsAsync(IAsyncDatabaseCommands databaseCommands, string database, ICredentials credentialsForSession, OpenSessionOptions options)
{
if (database != null)
{
databaseCommands = databaseCommands.ForDatabase(database);
}
if (credentialsForSession != null)
{
databaseCommands = databaseCommands.With(credentialsForSession);
}
if (options.ForceReadFromMaster)
{
databaseCommands.ForceReadFromMaster();
}
return(databaseCommands);
}
private static IAsyncDatabaseCommands SetupCommandsAsync(IAsyncDatabaseCommands databaseCommands, string database, ICredentials credentialsForSession, OpenSessionOptions options)
{
if (database != null)
databaseCommands = databaseCommands.ForDatabase(database);
if (credentialsForSession != null)
databaseCommands = databaseCommands.With(credentialsForSession);
if (options.ForceReadFromMaster)
databaseCommands.ForceReadFromMaster();
return databaseCommands;
}
private async Task<RangeValue> GetNextMaxAsyncInner(IAsyncDatabaseCommands databaseCommands)
{
var minNextMax = Range.Max;
using (databaseCommands.ForceReadFromMaster())
while (true)
{
try
{
ConflictException ce = null;
JsonDocument document;
try
{
document = await GetDocumentAsync(databaseCommands).ConfigureAwait(false);
}
catch (ConflictException e)
{
ce = e;
document = null;
}
if (ce != null)
return await HandleConflictsAsync(databaseCommands, ce, minNextMax).ConfigureAwait(false);
long min, max;
if (document == null)
{
min = minNextMax + 1;
max = minNextMax + capacity;
document = new JsonDocument
{
Etag = Etag.Empty,
// sending empty etag means - ensure the that the document does NOT exists
Metadata = new RavenJObject(),
DataAsJson = RavenJObject.FromObject(new { Max = max }),
Key = HiLoDocumentKey
};
}
else
{
var oldMax = GetMaxFromDocument(document, minNextMax);
min = oldMax + 1;
max = oldMax + capacity;
document.DataAsJson["Max"] = max;
}
await PutDocumentAsync(databaseCommands, document).ConfigureAwait(false);
return new RangeValue(min, max);
}
catch (ConcurrencyException)
{
//expected & ignored, will retry this
}
}
}
