/// <summary>
/// Internal method called by the StoreConflict class during RejectChangesInternal to resolve a store conflict
/// without locking the the save sync lock. This ultimately filters down through CancelChanges, which locks,
/// so this method does not need to. When it does lock, it causes a deadlock.
/// </summary>
/// <param name="conflict"></param>
/// <param name="resolutionAction"></param>
internal void ResolveStoreConflictNoLock(StoreConflict conflict, StoreConflictResolutionAction resolutionAction)
{
// Cache the modified entity, which may disappear depending on the resolution
IsolatedStorageOfflineEntity visibleEntity = conflict.ModifiedEntity;
// Respond to the resolution
if (resolutionAction == StoreConflictResolutionAction.AcceptModifiedEntity)
{
((IsolatedStorageOfflineEntity)conflict.ModifiedEntity).UpdateModifiedTickCount();
}
else if (resolutionAction == StoreConflictResolutionAction.AcceptStoreEntity)
{
_cacheData.ResolveStoreConflictByRollback(conflict.ModifiedEntity);
}
else
{
throw new ArgumentException("Invalid resolution action specified");
}
// Cleanup pointers to conflicts everywhere.
visibleEntity.StoreConflict = null;
this._storeConflicts.Remove(conflict);
// Clearing the context will prevent the resolution from being triggered again.
conflict.ClearContext();
}
/// <summary>
/// Internal method called by the StoreConflict class in order to resolve a store conflict. This must be done
/// because there must be some maintenance of the in-memory collections depending on the resolution of the conflict
/// </summary>
/// <param name="conflict">Conflict to resolve</param>
/// <param name="resolutionAction">Resolution action.</param>
internal void ResolveStoreConflict(StoreConflict conflict, StoreConflictResolutionAction resolutionAction)
{
using (_saveSyncLock.LockObject())
{
ResolveStoreConflictNoLock(conflict, resolutionAction);
}
}
/// <summary>
/// Calls the context to resolve it.
/// </summary>
/// <param name="resolutionAction"></param>
public void Resolve(StoreConflictResolutionAction resolutionAction)
{
if (_context == null)
{
throw new InvalidOperationException("Conflict has already been resolved");
}
_context.ResolveStoreConflict(this, resolutionAction);
}
/// <summary>
/// Calls the context to resolve it.
/// </summary>
/// <param name="resolutionAction"></param>
public void Resolve(StoreConflictResolutionAction resolutionAction)
{
if (_context == null)
{
throw new InvalidOperationException("Conflict has already been resolved");
}
_context.ResolveStoreConflict(this, resolutionAction);
}
/// <summary>
/// Called internally to avoid a deadlock when CancelChanges is called on the
/// context
/// </summary>
/// <param name="resolutionAction"></param>
internal void ResolveInternal(StoreConflictResolutionAction resolutionAction)
{
_context.ResolveStoreConflictNoLock(this, resolutionAction);
}
/// <summary>
/// Called internally to avoid a deadlock when CancelChanges is called on the
/// context
/// </summary>
/// <param name="resolutionAction"></param>
internal void ResolveInternal(StoreConflictResolutionAction resolutionAction)
{
_context.ResolveStoreConflictNoLock(this, resolutionAction);
}