public async Task PersistClusterResourceAsync(string key, StandAloneCluster cluster, CancellationToken cancellationToken)
{
UpgradeOrchestrationTrace.TraceSource.WriteInfo(TraceType, "Enter PersistClusterResourceAsync.");
var clusterStateTable = await this.stateManager.GetOrAddAsync <IReliableDictionary <string, string> >(Constants.ClusterReliableDictionaryName);
try
{
UpgradeOrchestrationTrace.TraceSource.WriteInfo(TraceType, "Serialize cluster resource into string format.");
string clusterString = JsonConvert.SerializeObject(
cluster,
StandaloneUtility.GetStandAloneClusterSerializerSettings());
using (var tx = this.stateManager.CreateTransaction())
{
UpgradeOrchestrationTrace.TraceSource.WriteInfo(TraceType, "Enter transaction inside PersistClusterResourceAsync");
if (string.IsNullOrEmpty(cluster.PersistedClusterString))
{
await clusterStateTable.AddAsync(
tx,
key,
clusterString,
Constants.DefaultDictionaryTimeout,
cancellationToken).ConfigureAwait(false);
}
else
{
/* This is a workaround for scenarios where clusters were upgraded from 5.x->6.x. During deserealization, we change the version in UOSState from 5.0.0.0 to 6.0.0.0. This is needed for
* newtonsoft deserealization to work with the new assembly versions. Here we revert 6.0.0.0 back to 5.0.0.0 before persisting it so that users can downgrade succesfully from 6.x -> 5.x
* versions. Once 5.x is deprecated, we can remove this workaround and persist 6.0.0.0 in UOS state */
if (isVersionChangedFrom5To6)
{
clusterString = NormalizeClusterResource(clusterString, Version5);
}
bool success = await clusterStateTable.TryUpdateAsync(
tx,
key,
clusterString,
cluster.PersistedClusterString).ConfigureAwait(false);
if (!success)
{
UpgradeOrchestrationTrace.TraceSource.WriteWarning(
TraceType,
"PersistClusterResourceAsync: StandAloneCluster data is not updated. The reason is {0}",
string.Equals(clusterString, cluster.PersistedClusterString, StringComparison.OrdinalIgnoreCase) ? "the value is not changed." : "to be investigated.");
return;
}
}
await tx.CommitAsync().ConfigureAwait(false);
}
UpgradeOrchestrationTrace.TraceSource.WriteInfo(TraceType, "Exit transaction inside PersistClusterResourceAsync");
}
catch (Exception e)
{
UpgradeOrchestrationTrace.TraceSource.WriteWarning(TraceType, "PersistClusterResourceAsync: {0}", e.ToString());
throw;
}
}