public static async Task <bool> DeleteIfExistsAsync(this CloudBlockBlob blob)
{
var tcs = new TaskCompletionSource <bool>();
blob.BeginDeleteIfExists(iar =>
{
try { tcs.TrySetResult(blob.EndDeleteIfExists(iar)); }
catch (OperationCanceledException) { tcs.TrySetCanceled(); }
catch (Exception ex) { tcs.TrySetException(ex); }
}, null);
return(await tcs.Task);
}
public static async Task DeleteIfExists(this CloudBlockBlob blob)
{
var tcs = new TaskCompletionSource <object>();
blob.BeginDeleteIfExists(iar =>
{
try { blob.EndDownloadToStream(iar); tcs.TrySetResult(null); }
catch (OperationCanceledException) { tcs.TrySetCanceled(); }
catch (Exception ex) { tcs.TrySetException(ex); }
}, null);
await tcs.Task;
}
public void BlobIfExistsShouldNotHitSecondary()
{
AssertSecondaryEndpoint();
BlobRequestOptions options = new BlobRequestOptions();
CloudBlobContainer container = BlobTestBase.GetRandomContainerReference();
TestPrimaryOnlyCommand((opt, ctx) => container.CreateIfNotExists(opt, ctx), options);
TestPrimaryOnlyCommand((opt, ctx) => container.EndCreateIfNotExists(container.BeginCreateIfNotExists(opt, ctx, null, null)), options);
TestPrimaryOnlyCommand((opt, ctx) => container.DeleteIfExists(null, opt, ctx), options);
TestPrimaryOnlyCommand((opt, ctx) => container.EndDeleteIfExists(container.BeginDeleteIfExists(null, opt, ctx, null, null)), options);
CloudBlockBlob blockBlob = container.GetBlockBlobReference("blob1");
TestPrimaryOnlyCommand((opt, ctx) => blockBlob.DeleteIfExists(DeleteSnapshotsOption.None, null, opt, ctx), options);
TestPrimaryOnlyCommand((opt, ctx) => blockBlob.EndDeleteIfExists(blockBlob.BeginDeleteIfExists(DeleteSnapshotsOption.None, null, opt, ctx, null, null)), options);
CloudPageBlob pageBlob = container.GetPageBlobReference("blob2");
TestPrimaryOnlyCommand((opt, ctx) => pageBlob.DeleteIfExists(DeleteSnapshotsOption.None, null, opt, ctx), options);
TestPrimaryOnlyCommand((opt, ctx) => pageBlob.EndDeleteIfExists(pageBlob.BeginDeleteIfExists(DeleteSnapshotsOption.None, null, opt, ctx, null, null)), options);
}
