CurtHagenlocher commented on code in PR #3302:
URL: https://github.com/apache/arrow-adbc/pull/3302#discussion_r2291683248
##########
csharp/src/Drivers/Apache/Hive2/HiveServer2Statement.cs:
##########
@@ -52,6 +53,10 @@ internal class HiveServer2Statement : TracingStatement,
IHiveServer2Statement
protected const string PrimaryKeyPrefix = "PK_";
protected const string ForeignKeyPrefix = "FK_";
+ // Lock to ensure consistent access to TokenSource and OperationHandle
Review Comment:
nit: this comment is misleading insofar as the lock does not appear to be
directly related to `OperationHandle` access.
##########
csharp/src/Drivers/Apache/Hive2/HiveServer2Statement.cs:
##########
@@ -1006,5 +1028,72 @@ public bool TryGetDirectResults(IResponse response, out
TSparkDirectResults? dir
directResults = null;
return false;
}
+
+ /// <inheritdoc/>
+ public override void Cancel()
+ {
+ this.TraceActivity(_ =>
+ {
+ // This will cancel any operation using the current token
source
+ CancelTokenSource();
+ });
+ }
+
+ private async Task CancelOperationAsync(Activity? activity,
TOperationHandle? operationHandle)
+ {
+ if (operationHandle == null)
+ {
+ return;
+ }
+ using CancellationTokenSource cancellationTokenSource =
ApacheUtility.GetCancellationTokenSource(QueryTimeoutSeconds,
ApacheUtility.TimeUnit.Seconds);
+ try
+ {
+ activity?.AddEvent(
+ "db.operation.cancel_operation.starting",
+ [new(SemanticConventions.Db.Operation.OperationId, new
Guid(operationHandle.OperationId.Guid).ToString("N"))]);
+ TCancelOperationReq req = new(operationHandle);
+ TCancelOperationResp resp = await Client.CancelOperation(req,
cancellationTokenSource.Token);
+ HiveServer2Connection.HandleThriftResponse(resp.Status,
activity);
+ activity?.AddEvent(
+ "db.operation.cancel_operation.completed",
+ [new(SemanticConventions.Db.Response.StatusCode,
resp.Status.StatusCode.ToString())]);
+ }
+ catch (Exception ex)
+ {
+ activity?.AddException(ex);
+ }
+ }
+
+ private CancellationTokenSource SetTokenSource()
+ {
+ lock (_tokenSourceLock)
+ {
+ _executeTokenSource?.Dispose();
Review Comment:
Should this throw an exception if `_executeTokenSource` is non-null? We
don't support executing two simultaneous queries against the same statement, do
we?
##########
csharp/src/Drivers/Apache/ApacheUtility.cs:
##########
@@ -33,7 +33,21 @@ public enum TimeUnit
Milliseconds
}
+ public static CancellationTokenSource GetCancellationTokenSource(int
timeout, TimeUnit timeUnit)
+ {
+ TimeSpan timeSpan = CalculateTimeSpan(timeout, timeUnit);
+ return new CancellationTokenSource(timeSpan);
+
Review Comment:
nit: extra blank line
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