//TODO: When counter replication will be refactored (simplified) -> the parameter should be removed; now its a constraint of the interface
public void RefreshReplicationInformation()
{
JsonDocument document;
var serverHash = ServerHash.GetServerHash(counterStore.Url);
try
{
var replicationFetchTask = counterStore.GetReplicationsAsync();
replicationFetchTask.Wait();
if (replicationFetchTask.Status != TaskStatus.Faulted)
{
failureCounters.ResetFailureCount(counterStore.Url);
}
document = new JsonDocument
{
DataAsJson = RavenJObject.FromObject(replicationFetchTask.Result)
};
}
catch (Exception e)
{
log.ErrorException("Could not contact master for fetching replication information. Something is wrong.", e);
document = ReplicationInformerLocalCache.TryLoadReplicationInformationFromLocalCache(serverHash);
if (document == null || document.DataAsJson == null)
{
throw;
}
}
ReplicationInformerLocalCache.TrySavingReplicationInformationToLocalCache(serverHash, document);
UpdateReplicationInformationFromDocument(document);
}
/// <summary>
/// Refreshes the replication information.
/// Expert use only.
/// </summary>
public override void RefreshReplicationInformation(IAsyncFilesCommands commands)
{
lock (this)
{
var serverClient = (IAsyncFilesCommandsImpl)commands;
string urlForFilename = serverClient.UrlFor();
var serverHash = ServerHash.GetServerHash(urlForFilename);
JsonDocument document = null;
try
{
var config = serverClient.Configuration.GetKeyAsync <RavenJObject>(SynchronizationConstants.RavenSynchronizationDestinations).Result;
failureCounts[urlForFilename] = new FailureCounter(); // we just hit the master, so we can reset its failure count
if (config != null)
{
var destinationsArray = config.Value <RavenJArray>("Destinations");
if (destinationsArray != null)
{
document = new JsonDocument();
document.DataAsJson = new RavenJObject()
{
{ "Destinations", destinationsArray }
};
}
}
}
catch (Exception e)
{
log.ErrorException("Could not contact master for new replication information", e);
document = ReplicationInformerLocalCache.TryLoadReplicationInformationFromLocalCache(serverHash);
}
if (document == null)
{
lastReplicationUpdate = SystemTime.UtcNow; // checked and not found
return;
}
ReplicationInformerLocalCache.TrySavingReplicationInformationToLocalCache(serverHash, document);
UpdateReplicationInformationFromDocument(document);
lastReplicationUpdate = SystemTime.UtcNow;
}
}
/// <summary>
/// Refreshes the replication information.
/// Expert use only.
/// </summary>
public override void RefreshReplicationInformation(IAsyncFilesCommands commands)
{
lock (this)
{
var serverClient = (IAsyncFilesCommandsImpl)commands;
var urlForFilename = serverClient.UrlFor();
var serverHash = ServerHash.GetServerHash(urlForFilename);
JsonDocument document = null;
try
{
var destinations = serverClient.Synchronization.GetDestinationsAsync().Result;
FailureCounters.FailureCounts[urlForFilename] = new FailureCounter(); // we just hit the master, so we can reset its failure count
if (destinations != null)
{
document = new JsonDocument
{
DataAsJson = new RavenJObject {
{ "Destinations", RavenJToken.FromObject(destinations) }
}
};
}
}
catch (Exception e)
{
Log.ErrorException("Could not contact master for new replication information", e);
document = ReplicationInformerLocalCache.TryLoadReplicationInformationFromLocalCache(serverHash);
}
if (document == null)
{
lastReplicationUpdate = SystemTime.UtcNow;
ReplicationDestinations.Clear(); // clear destinations that could be retrieved from local storage
return;
}
if (IsInvalidDestinationsDocument(document) == false)
{
ReplicationInformerLocalCache.TrySavingReplicationInformationToLocalCache(serverHash, document);
UpdateReplicationInformationFromDocument(document);
}
lastReplicationUpdate = SystemTime.UtcNow;
}
}
internal bool UpdateTopology(AsyncServerClient serverClient, OperationMetadata node, ReplicationDocumentWithClusterInformation replicationDocument, string serverHash, OperationMetadata prevLeader)
{
Nodes = GetNodes(node, replicationDocument);
var newLeader = Nodes.SingleOrDefault(x => x.ClusterInformation.IsLeader);
var document = new JsonDocument
{
DataAsJson = RavenJObject.FromObject(replicationDocument)
};
ReplicationInformerLocalCache.TrySavingReplicationInformationToLocalCache(serverHash, document);
if (replicationDocument.ClientConfiguration != null)
{
if (replicationDocument.ClientConfiguration.FailoverBehavior == null)
{
if (Log.IsDebugEnabled)
{
Log.Debug($"Server side failoever configuration is set to let client decide, client decided on {serverClient.convention.FailoverBehavior}. ");
}
replicationDocument.ClientConfiguration.FailoverBehavior = serverClient.convention.FailoverBehavior;
}
else if (Log.IsDebugEnabled)
{
Log.Debug($"Server enforced failoever behavior {replicationDocument.ClientConfiguration.FailoverBehavior}. ");
}
serverClient.convention.UpdateFrom(replicationDocument.ClientConfiguration);
}
if (newLeader != null)
{
SetLeaderNodeToKnownLeader(newLeader);
return(true);
}
//here we try to set leader node to null but we might fail since it was changed.
//We just need to make sure that the leader node is not null and we can stop searching.
if (SetLeaderNodeToNullIfPrevIsTheSame(prevLeader) == false && LeaderNode != null)
{
return(true);
}
return(false);
}
