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When linking two groups, and then deleting the combined group: delete *all* of the combined group's prims, including those that came from the second subgroup 

This fixes http://opensimulator.org/mantis/view.php?id=6175
0.8.0.3
Oren Hurvitz 2013-10-24 11:18:15 +03:00
parent b0cb0ec02f
commit 62b3bdf0fc
3 changed files with 41 additions and 17 deletions
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12
OpenSim/Region/Framework/Scenes/Scene.cs
View File

@ -1757,6 +1757,7 @@ namespace OpenSim.Region.Framework.Scenes
{
if (group != null)
{
group.HasGroupChanged = true;
group.ProcessBackup(SimulationDataService, true);
}
}
@ -2345,13 +2346,12 @@ namespace OpenSim.Region.Framework.Scenes
{
if (!softDelete)
{
// Force a database update so that the scene object group ID is accurate. It's possible that the
// group has recently been delinked from another group but that this change has not been persisted
// to the DB.
// If the group contains prims whose SceneGroupID is incorrect then force a
// database update, because RemoveObject() works by searching on the SceneGroupID.
// This is an expensive thing to do so only do it if absolutely necessary.
if (so.HasGroupChangedDueToDelink)
ForceSceneObjectBackup(so);
if (so.GroupContainsForeignPrims)
ForceSceneObjectBackup(so);
so.DetachFromBackup();
SimulationDataService.RemoveObject(so.UUID, RegionInfo.RegionID);
}

38
OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
View File

@ -150,12 +150,27 @@ namespace OpenSim.Region.Framework.Scenes
get { return m_hasGroupChanged; }
}
private bool m_groupContainsForeignPrims = false;
/// <summary>
/// Has the group changed due to an unlink operation? We record this in order to optimize deletion, since
/// an unlinked group currently has to be persisted to the database before we can perform an unlink operation.
/// Whether the group contains prims that came from a different group. This happens when
/// linking or delinking groups. The implication is that until the group is persisted,
/// the prims in the database still use the old SceneGroupID. That's a problem if the group
/// is deleted, because we delete groups by searching for prims by their SceneGroupID.
/// </summary>
public bool HasGroupChangedDueToDelink { get; private set; }
public bool GroupContainsForeignPrims
{
private set
{
m_groupContainsForeignPrims = value;
if (m_groupContainsForeignPrims)
HasGroupChanged = true;
}
get { return m_groupContainsForeignPrims; }
}
private bool isTimeToPersist()
{
@ -1624,7 +1639,7 @@ namespace OpenSim.Region.Framework.Scenes
backup_group.RootPart.AngularVelocity = RootPart.AngularVelocity;
backup_group.RootPart.ParticleSystem = RootPart.ParticleSystem;
HasGroupChanged = false;
HasGroupChangedDueToDelink = false;
GroupContainsForeignPrims = false;
m_scene.EventManager.TriggerOnSceneObjectPreSave(backup_group, this);
datastore.StoreObject(backup_group, m_scene.RegionInfo.RegionID);
@ -2388,6 +2403,8 @@ namespace OpenSim.Region.Framework.Scenes
// If linking prims with different permissions, fix them
AdjustChildPrimPermissions();
GroupContainsForeignPrims = true;
AttachToBackup();
// Here's the deal, this is ABSOLUTELY CRITICAL so the physics scene gets the update about the
@ -2531,9 +2548,16 @@ namespace OpenSim.Region.Framework.Scenes
linkPart.Rezzed = RootPart.Rezzed;
// When we delete a group, we currently have to force persist to the database if the object id has changed
// (since delete works by deleting all rows which have a given object id)
objectGroup.HasGroupChangedDueToDelink = true;
// We must persist the delinked group to the database immediately, for safety. The problem
// is that although in memory the new group has a new SceneGroupID, in the database it
// still has the parent group's SceneGroupID (until the next backup). This means that if the
// parent group is deleted then the delinked group will also be deleted from the database.
// This problem will disappear if the region remains alive long enough for another backup,
// since at that time the delinked group's new SceneGroupID will be written to the database.
// But if the region crashes before that then the prims will be permanently gone, and this must
// not happen. (We can't use a just-in-time trick like GroupContainsForeignPrims in this case
// because the delinked group doesn't know when the source group is deleted.)
m_scene.ForceSceneObjectBackup(objectGroup);
return objectGroup;
}

8
OpenSim/Region/Framework/Scenes/Tests/SceneObjectLinkingTests.cs
View File

@ -143,7 +143,7 @@ namespace OpenSim.Region.Framework.Scenes.Tests
Assert.That(grp1.Parts.Length, Is.EqualTo(1), "Group 1 still contained part2 after delink.");
Assert.That(part2.AbsolutePosition == Vector3.Zero, "The absolute position should be zero");
Assert.That(grp3.HasGroupChangedDueToDelink, Is.True);
Assert.That(grp3.GroupContainsForeignPrims, Is.True);
}
[Test]
@ -349,10 +349,10 @@ namespace OpenSim.Region.Framework.Scenes.Tests
// These changes should occur immediately without waiting for a backup pass
SceneObjectGroup groupToDelete = sog.DelinkFromGroup(linkPart, false);
Assert.That(groupToDelete.HasGroupChangedDueToDelink, Is.True);
Assert.That(groupToDelete.GroupContainsForeignPrims, Is.True);
scene.DeleteSceneObject(groupToDelete, false);
Assert.That(groupToDelete.HasGroupChangedDueToDelink, Is.False);
Assert.That(groupToDelete.GroupContainsForeignPrims, Is.False);
List<SceneObjectGroup> storedObjects = scene.SimulationDataService.LoadObjects(scene.RegionInfo.RegionID);