/// <summary>
/// Opens a new workspace with assumed latest available snapshot
/// </summary>
/// <typeparam name="TDataType">Type of root entity interface for data navigation. This is the "all containing" entity, which has access to all other entities.</typeparam>
/// <param name="isolationLevel">Workspace isolation</param>
/// <param name="timeout">Workspace timeout</param>
/// <returns>New workspace instance</returns>
public Workspace <TDataType> OpenWorkspace <TDataType>(IsolationLevel isolationLevel, TimeSpan timeout)
{
if (!SnapshotIsolationEnabled && isolationLevel == IsolationLevel.Snapshot)
{
throw new ArgumentException("Snapshot isolation level disabled by configuration");
}
if (isolationLevel == IsolationLevel.Exclusive)
{
workspaceExclusiveLockProvider.EnterLockExclusive();
}
Guid snapshotId = snapshotsService.GetLatestSnapshotId();
return(new Workspace <TDataType>(snapshotId, timeout, provider, workspaceFacade, proxyCreatorService, typesService, isolationLevel, immutableProxyMap));
}
/// <summary>
/// Creates subscription to object changes
/// </summary>
/// <param name="workspaceId">Workspace ID</param>
/// <param name="instanceId">Instance Id which changes are going to be notified</param>
/// <param name="notifyChangesFromSameWorkspace">Defines if changes from same workspace should be notified</param>
/// <param name="del">Delegate to be called</param>
/// <returns>Subscription object</returns>
public Subscription CreateSubscription(Guid workspaceId, Guid instanceId, bool notifyChangesFromSameWorkspace, EventHandler <ObjectChangedEventArgs> del)
{
lock (commitSync)
{
Guid snapshotId = workspaceStateProvider.GetWorkspaceSnapshotId(workspaceId);
var result = subscriptionManagerService.Create(workspaceId, instanceId, notifyChangesFromSameWorkspace, del);
var lastSnapshotId = snapshotsService.GetLatestSnapshotId();
if (!lastSnapshotId.Equals(snapshotId))
{
var changes = commitDataService.ChangesBetween(snapshotId, lastSnapshotId);
subscriptionManagerService.InvokeEvents(Guid.Empty, new CommitResult <Guid>(lastSnapshotId, changes));
}
return(result);
}
}
