/// <summary>
/// Handles the AttributeInComponentChanged-Event of an Entity. Invokes or stops a motion depending on the new values for velocity
/// </summary>
/// <param name="sender">The entity that fired the event</param>
/// <param name="e">The EventArgs</param>
private void HandleOnAttributeChanged(Object sender, ChangedAttributeEventArgs e)
{
Entity entity = (Entity)sender;
CheckForEntityMoving(entity);
CheckForEntitySpinning(entity);
}
private void HandleChangedComponentAttribute(object sender, ChangedAttributeEventArgs e)
{
if (ChangedAttribute != null)
{
ChangedAttribute(this, e);
}
}
private void HandleOnAttributeInComponentChanged(object sender, ChangedAttributeEventArgs e)
{
if (e.Component.Name == "scripting")
{
InitEntityContext((Entity)sender);
}
}
/// <summary>
/// Creates the update info from event arguments.
/// </summary>
/// <returns>The update info from event arguments.</returns>
/// <param name="entityGuid">GUID of the entity triggering the AttributeChanged event</param>
/// <param name="e">Event arguments</param>
private UpdateInfo CreateUpdateInfoFromEventArgs(Entity entity, ChangedAttributeEventArgs e)
{
UpdateInfo newUpdateInfo = new UpdateInfo();
newUpdateInfo.entityGuid = entity.Guid.ToString();
newUpdateInfo.componentName = e.Component.Name;
newUpdateInfo.attributeName = e.AttributeName;
newUpdateInfo.value = e.NewValue;
return(newUpdateInfo);
}
void HandleChangedAvatarComponent(object sender, ChangedAttributeEventArgs e)
{
if (e.AttributeName == "userLogin")
{
if (e.OldValue != null && avatarEntities.ContainsKey((string)e.OldValue))
{
avatarEntities.Remove((string)e.OldValue);
}
avatarEntities[(string)e.NewValue] = e.Entity;
}
}
private void updateCompleteGraph(object sender, ChangedAttributeEventArgs e)
{
string attributeUri = e.Component[e.AttributeName].GetDatapoint().Route;
completeGraph.RDFGraph.Retract(new Triple(
completeGraph.RDFGraph.CreateUriNode(new Uri(attributeUri)),
completeGraph.RDFGraph.CreateUriNode("rdf:value"),
completeGraph.RDFGraph.CreateLiteralNode(e.OldValue.ToString(), new Uri("xsd:attributeValue"))));
completeGraph.RDFGraph.Assert(new Triple(
completeGraph.RDFGraph.CreateUriNode(new Uri(attributeUri)),
completeGraph.RDFGraph.CreateUriNode("rdf:value"),
completeGraph.RDFGraph.CreateLiteralNode(e.NewValue.ToString(), new Uri("xsd:attributeValue"))));
}
/// <summary>
/// Handler for the event ChangedAttribute event in the Entity. Update local sync info for the attribute and
/// invokes changedAttributes method on the connected sync nodes to notify them about the change.
/// </summary>
/// <param name="sender">Event sender.</param>
/// <param name="e">Event arguments.</param>
private void HandleLocalChangedAttribute(object sender, ChangedAttributeEventArgs e)
{
var componentName = e.Component.Name;
var attributeName = e.AttributeName;
// Ignore this change if it was caused by the scalability plugin itself.
lock (remoteAttributeChanges)
{
foreach (RemoteAttributeChange change in remoteAttributeChanges)
{
if (change.Entity == e.Entity && change.ComponentName == componentName &&
change.AttributeName == attributeName && change.Value == e.NewValue)
{
remoteAttributeChanges.Remove(change);
return;
}
}
}
var newAttributeSyncInfo = new AttributeSyncInfo(LocalSyncID, e.NewValue);
lock (localSyncInfo)
{
if (!localSyncInfo.ContainsKey(e.Entity.Guid))
{
logger.Warn("Local attribute changed in an entity which has no sync info.");
return;
}
EntitySyncInfo entitySyncInfo = localSyncInfo[e.Entity.Guid];
entitySyncInfo[componentName][attributeName] = newAttributeSyncInfo;
}
// TODO: Optimization: we can send batch updates to improve performance. Received code is written to
// process batches already, but sending is trickier as we don't have network load feedback from KIARA yet.
var changedAttributes = new EntitySyncInfo();
changedAttributes[componentName][attributeName] = newAttributeSyncInfo;
lock (remoteSyncNodes)
{
foreach (Connection connection in remoteSyncNodes)
{
connection["changeAttributes"](e.Entity.Guid, changedAttributes);
}
}
}
/// <summary>
/// Adds update information about an entity to the update queue after having received an attributeChanged event
/// </summary>
/// <param name="sender">Entity that invoked the attribute change event</param>
/// <param name="e">Event Arguments</param>
private void AddEntityUpdateToQueue(Object sender, ChangedAttributeEventArgs e)
{
bool gotLock = false;
try
{
QueueLock.Enter(ref gotLock);
UpdateQueue.Add(CreateUpdateInfoFromEventArgs((Entity)sender, e));
}
finally
{
if (gotLock)
{
QueueLock.Exit();
}
}
}
/// <summary>
/// Handler for the event ChangedAttribute event in the Entity. Update local sync info for the attribute and
/// invokes changedAttributes method on the connected sync nodes to notify them about the change.
/// </summary>
/// <param name="sender">Event sender.</param>
/// <param name="e">Event arguments.</param>
internal void HandleLocalChangedAttribute(object sender, ChangedAttributeEventArgs e)
{
var componentName = e.Component.Name;
var attributeName = e.AttributeName;
// Ignore this change if it was caused by the scalability plugin itself.
lock (ignoredAttributeChanges)
{
var attributeUpdate = new AttributeUpdate(e.Entity.Guid, componentName, attributeName, e.NewValue);
if (ignoredAttributeChanges.Remove(attributeUpdate))
{
return;
}
}
var newAttributeSyncInfo =
new AttributeSyncInfo(ServerSync.LocalServer.SyncID.ToString(), e.NewValue);
lock (syncInfo)
{
if (!syncInfo.ContainsKey(e.Entity.Guid))
{
logger.Warn("Local attribute changed in an entity which has no sync info.");
return;
}
EntitySyncInfo entitySyncInfo = syncInfo[e.Entity.Guid];
entitySyncInfo[componentName][attributeName] = newAttributeSyncInfo;
}
var changedAttributes = new EntitySyncInfo();
changedAttributes[componentName][attributeName] = newAttributeSyncInfo;
foreach (IRemoteServer server in ServerSync.RemoteServers)
{
if (server.DoI.IsInterestedInAttributeChange(e.Entity, e.Component.Name, e.AttributeName))
{
server.Connection["serverSync.changeAttributes"](e.Entity.Guid.ToString(), changedAttributes);
}
}
}
/// <summary>
/// Event Handler for AttributeInComponentChanged on Entity. When fired, the value update is queued to be persisted on the next persistence
/// save to the database
/// </summary>
/// <param name="sender">Sender of the event (the Entity)</param>
/// <param name="e">Event arguments</param>
internal void OnAttributeChanged(Object sender, ChangedAttributeEventArgs e)
{
Guid changedAttributeGuid = e.Component.Definition[e.AttributeName].Guid;
AddAttributeToPersisted(e.Component.Guid, e.AttributeName, e.NewValue);
}
