public async Task <bool> PromoteToLeaderAsync()
{
if (m_acquiredLease == null)
{
EnsureBlobExists();
try
{
var acquiredLeaseId = await m_blob.AcquireLeaseAsync();
await ManageLeaseTimoutAsync(acquiredLeaseId);
m_acquiredLease = acquiredLeaseId;
m_leaseAcquisitionTime = DateTimeOffset.UtcNow;
}
catch (LeaseAlreadyAcquiredException exception)
{
s_logger.Debug(
exception,
"Promotion session ({StreamName}, {ConsumerId}) to leader failed.",
m_streamName,
m_consumerId);
}
}
else
{
await ManageLeaseTimoutAsync(m_acquiredLease);
}
if (m_acquiredLease == null)
{
await BreakLeasIfExpiredAsync();
}
return(m_acquiredLease != null);
}
public static async Task <Lease> AcquireAsync(ICloudBlockBlob blob, TimeSpan leasePeriod)
{
Require.NotNull(blob, "blob");
try
{
var leaseId = await blob.AcquireLeaseAsync(leasePeriod);
return(new Lease(leaseId));
}
catch (LeaseAlreadyAcquiredException)
{
}
return(NotAcquired);
}
public static Task <string> AcquireLeaseAsync(this ICloudBlockBlob blob)
{
Require.NotNull(blob, "blob");
return(blob.AcquireLeaseAsync(null));
}
