/// <summary>
/// Signal that we've received a ping from a neighbor
/// </summary>
/// <param name="region"></param>
private void HandleNeighborPing(SimpleRegionInfo region)
{
bool newNeighbor = false;
KnownNeighborRegion neighbor;
lock (_knownNeighbors)
{
if (_knownNeighbors.TryGetValue(region.RegionHandle, out neighbor))
{
neighbor.LastPingReceivedOn = Util.GetLongTickCount();
}
else
{
newNeighbor = true;
neighbor = new KnownNeighborRegion { LastPingReceivedOn = Util.GetLongTickCount(), RegionInfo = region };
_knownNeighbors.Add(neighbor.RegionInfo.RegionHandle, neighbor);
}
}
if (newNeighbor)
{
TriggerNeighborStateChange(region, NeighborStateChangeType.NeighborUp);
}
TriggerNeighborStateChange(region, NeighborStateChangeType.NeighborPing);
}
/// <summary>
/// Signal that a neighbor has come up
/// </summary>
/// <param name="region">The region information</param>
private void HandleNeighborUp(SimpleRegionInfo region)
{
var newNeighbor = new KnownNeighborRegion
{
LastPingReceivedOn = Util.GetLongTickCount(),
RegionInfo = region
};
lock (_knownNeighbors)
{
_knownNeighbors[region.RegionHandle] = newNeighbor;
}
TriggerNeighborStateChange(region, NeighborStateChangeType.NeighborUp);
}
private void KillNeighborOnUpMessageFailure(KnownNeighborRegion neighbor, MessageType type)
{
//if this is an "up" message, consider the region crashed and remove it from neighbors
if (type == MessageType.Up)
{
lock (_knownNeighbors)
{
_knownNeighbors.Remove(neighbor.RegionInfo.RegionHandle);
_doaRegions.Add(neighbor.RegionInfo.RegionHandle);
}
}
}
/// <summary>
/// Begins a series of async calls to refresh neighbor regions from storage. This should be
/// called only when we're first coming on line
/// </summary>
/// <remarks>
/// Will throw exceptions if the list can not be loaded
/// </remarks>
public async Task RefreshNeighborsFromStorage()
{
Task<List<SimpleRegionInfo>> neighborsTask =
_scene.CommsManager.GridService.RequestNeighbors2Async(
_scene.RegionInfo.RegionLocX, _scene.RegionInfo.RegionLocY, MAX_DRAW_DISTANCE);
await neighborsTask;
Dictionary<ulong, KnownNeighborRegion> knownNeighbors = new Dictionary<ulong, KnownNeighborRegion>();
foreach (var neighbor in neighborsTask.Result)
{
var region = new KnownNeighborRegion { LastPingReceivedOn = Util.GetLongTickCount(), RegionInfo = neighbor };
knownNeighbors.Add(region.RegionInfo.RegionHandle, region);
}
//atomic swapout
_knownNeighbors = knownNeighbors;
_timeNeighborsInitiallyQueried = Util.GetLongTickCount();
return;
}
private async Task<bool> DoRegionAsyncCall(HttpWebRequest req, KnownNeighborRegion neighbor, MessageType type, byte[] body)
{
try
{
using (System.IO.Stream reqStream = await req.GetRequestStreamAsync())
{
await reqStream.WriteAsync(body, 0, body.Length);
}
}
catch (Exception e)
{
_log.ErrorFormat("[REGIONMANAGER]: Could not post request for {0} to region {1} at {2}: {3}",
type, neighbor.RegionInfo.RegionHandle, Util.RegionHandleToLocationString(neighbor.RegionInfo.RegionHandle), e.Message);
KillNeighborOnUpMessageFailure(neighbor, type);
return false;
}
try
{
using (WebResponse response = await req.GetResponseAsync(NEIGHBOR_HANDLER_TIMEOUT))
{
//we dont do anything with the response
}
}
catch (Exception e)
{
_log.ErrorFormat("[REGIONMANAGER]: Unable to read response to {0} for region {1} at {2}: {3}",
type, neighbor.RegionInfo.RegionHandle, Util.RegionHandleToLocationString(neighbor.RegionInfo.RegionHandle), e.Message);
KillNeighborOnUpMessageFailure(neighbor, type);
return false;
}
return true;
}
