public async Task <bool> TryStartUpdateSession(string applicationId)
{
using (IUpdateBlob updateBlob = await _updateBlobFactory.TryLockUpdateBlob(applicationId))
{
string updateDomain = updateBlob.GetUpdateDomain();
if (string.IsNullOrEmpty(updateDomain) || _instanceUpdateDomain == updateDomain)
{
updateDomain = _instanceUpdateDomain;
Trace.TraceInformation(
$"Instance {_instanceId} will attempt to start update session for " +
$"ApplicationId = {applicationId}, UpdateDomain = {updateDomain}");
updateBlob.SetUpdateDomain(updateDomain);
updateBlob.AddInstance(_instanceId);
await updateBlob.FlushAndRelease();
Trace.TraceInformation(
$"Instance {_instanceId} successfully started the update session for " +
$"ApplicationId = {applicationId}, UpdateDomain = {updateDomain}");
return(true);
}
}
return(false);
}
public Task <IUpdateBlob> TryLockUpdateBlob(string appId)
{
return(_retryPolicy.ExecuteAsync(() => _updateBlobFactory.TryLockUpdateBlob(appId)));
}