protected override OverridesSnapshot <TSubApp, TTier, TDataCenter> RestoreSnapshotImpl(OverridesSnapshot <TSubApp, TTier, TDataCenter> snapshot, string user)
{
var data = _appData;
lock (data)
{
data.Commit = NewCommit();
var log = new NFigLogEvent <TDataCenter>(
type: NFigLogEventType.RestoreSnapshot,
globalAppName: snapshot.GlobalAppName,
commit: data.Commit,
timestamp: DateTime.UtcNow,
settingName: null,
settingValue: null,
restoredCommit: snapshot.Commit,
dataCenter: default(TDataCenter),
user: user);
data.LastEvent = log.BinarySerialize();
data.Overrides.Clear();
foreach (var o in snapshot.Overrides)
{
var key = GetOverrideKey(o.Name, o.SubApp, o.DataCenter);
data.Overrides.Add(key, o.Value);
}
return(CreateSnapshot(data));
}
}
public static OverridesSnapshot <SubApp, Tier, DataCenter> CreateSnapshot(
string globalAppName = GLOBAL_APP_1,
string commit = NFigStore.INITIAL_COMMIT,
List <SettingValue <SubApp, Tier, DataCenter> > overrides = null,
NFigLogEvent <DataCenter> lastEvent = null)
{
return(new OverridesSnapshot <SubApp, Tier, DataCenter>(globalAppName, commit, overrides, lastEvent));
}
OverridesSnapshot <TSubApp, TTier, TDataCenter> CreateSnapshot(InMemoryAppData data)
{
var overrides = new List <SettingValue <TSubApp, TTier, TDataCenter> >();
foreach (var kvp in data.Overrides)
{
SettingValue <TSubApp, TTier, TDataCenter> value;
if (TryGetValueFromOverride(kvp.Key, kvp.Value, out value))
{
overrides.Add(value);
}
}
var lastEvent = NFigLogEvent <TDataCenter> .BinaryDeserialize(data.LastEvent);
return(new OverridesSnapshot <TSubApp, TTier, TDataCenter>(GlobalAppName, data.Commit, overrides, lastEvent));
}
protected override OverridesSnapshot <TSubApp, TTier, TDataCenter> ClearOverrideImpl(
string settingName,
TDataCenter dataCenter,
string user,
TSubApp subApp,
string commit)
{
var key = GetOverrideKey(settingName, subApp, dataCenter);
var data = _appData;
lock (data)
{
if (commit != null && commit != data.Commit)
{
return(null);
}
if (!data.Overrides.ContainsKey(key))
{
return(null);
}
data.Overrides.Remove(key);
data.Commit = NewCommit();
var log = new NFigLogEvent <TDataCenter>(
type: NFigLogEventType.ClearOverride,
globalAppName: GlobalAppName,
commit: data.Commit,
timestamp: DateTime.UtcNow,
settingName: settingName,
settingValue: null,
restoredCommit: null,
dataCenter: dataCenter,
user: user);
data.LastEvent = log.BinarySerialize();
return(CreateSnapshot(data));
}
}
/// <summary>
/// Initializes a new snapshot object.
/// </summary>
/// <param name="globalAppName">The "Global" application name.</param>
/// <param name="commit">The commit ID at the time of the snapshot.</param>
/// <param name="overrides">A list of the overrides which exist at the time of the snapshot.</param>
/// <param name="lastEvent">The last event which occurred before the snapshot.</param>
public OverridesSnapshot(
[NotNull] string globalAppName,
[NotNull] string commit,
IList <SettingValue <TSubApp, TTier, TDataCenter> > overrides,
NFigLogEvent <TDataCenter> lastEvent)
{
if (globalAppName == null)
{
throw new ArgumentNullException(nameof(globalAppName));
}
if (commit == null)
{
throw new ArgumentNullException(nameof(commit));
}
GlobalAppName = globalAppName;
Commit = commit;
Overrides = overrides;
LastEvent = lastEvent;
}