private void DownloadObject(ProgressMonitor pm, AnyObjectId id)
{
if (_local.HasObject(id))
{
return;
}
while (true)
{
// Try a pack file we know about, but don't have yet. Odds are
// that if it has this object, it has others related to it so
// getting the pack is a good bet.
//
if (DownloadPackedObject(pm, id))
{
return;
}
// Search for a loose object over all alternates, starting
// from the one we last successfully located an object through.
//
string idStr = id.Name;
string subdir = idStr.Slice(0, 2);
string file = idStr.Substring(2);
string looseName = subdir + "/" + file;
for (int i = _lastRemoteIdx; i < _remotes.Count; i++)
{
if (DownloadLooseObject(id, looseName, _remotes[i]))
{
_lastRemoteIdx = i;
return;
}
}
for (int i = 0; i < _lastRemoteIdx; i++)
{
if (DownloadLooseObject(id, looseName, _remotes[i]))
{
_lastRemoteIdx = i;
return;
}
}
// Try to obtain more pack information and search those.
//
while (_noPacksYet.Count > 0)
{
WalkRemoteObjectDatabase wrr = _noPacksYet.First.Value;
_noPacksYet.RemoveFirst();
ICollection <string> packNameList;
try
{
pm.BeginTask("Listing packs", ProgressMonitor.UNKNOWN);
packNameList = wrr.getPackNames();
}
catch (IOException e)
{
// Try another repository.
//
RecordError(id, e);
continue;
}
finally
{
pm.EndTask();
}
if (packNameList == null || packNameList.Count == 0)
{
continue;
}
foreach (string packName in packNameList)
{
bool contains = _packsConsidered.Contains(packName);
_packsConsidered.Add(packName);
if (!contains)
{
_unfetchedPacks.AddLast(new RemotePack(_lockMessage, _packLocks, _objCheck, _local, wrr, packName));
}
}
if (DownloadPackedObject(pm, id))
{
return;
}
}
// Try to expand the first alternate we haven't expanded yet.
//
ICollection <WalkRemoteObjectDatabase> al = ExpandOneAlternate(id, pm);
if (al != null && al.Count > 0)
{
foreach (WalkRemoteObjectDatabase alt in al)
{
_remotes.Add(alt);
_noPacksYet.AddLast(alt);
_noAlternatesYet.AddLast(alt);
}
continue;
}
// We could not obtain the object. There may be reasons why.
//
List <Exception> failures = _fetchErrors.get(id.Copy());
var te = new TransportException("Cannot get " + id.Name + ".");
if (failures != null && failures.Count > 0)
{
te = failures.Count == 1 ?
new TransportException("Cannot get " + id.Name + ".", failures[0]) :
new TransportException("Cannot get " + id.Name + ".", new CompoundException(failures));
}
throw te;
}
}
private void DownloadObject(ProgressMonitor pm, AnyObjectId id)
{
if (_local.HasObject(id))
{
return;
}
while (true)
{
if (DownloadPackedObject(pm, id))
{
return;
}
string idStr = id.Name;
string subdir = idStr.Slice(0, 2);
string file = idStr.Substring(2);
string looseName = subdir + "/" + file;
for (int i = _lastRemoteIdx; i < _remotes.Count; i++)
{
if (DownloadLooseObject(id, looseName, _remotes[i]))
{
_lastRemoteIdx = i;
return;
}
}
for (int i = 0; i < _lastRemoteIdx; i++)
{
if (DownloadLooseObject(id, looseName, _remotes[i]))
{
_lastRemoteIdx = i;
return;
}
}
while (_noPacksYet.Count > 0)
{
WalkRemoteObjectDatabase wrr = _noPacksYet.First.Value;
_noPacksYet.RemoveFirst();
List <string> packNameList;
try
{
pm.BeginTask("Listing packs", ProgressMonitor.UNKNOWN);
packNameList = wrr.getPackNames();
}
catch (IOException e)
{
RecordError(id, e);
continue;
}
finally
{
pm.EndTask();
}
if (packNameList == null || packNameList.Count == 0)
{
continue;
}
foreach (string packName in packNameList)
{
if (!_packsConsidered.Contains(packName))
{
_packsConsidered.Add(packName);
_unfetchedPacks.AddLast(new RemotePack(_lockMessage, _packLocks, _objCheck, _local, wrr, packName));
}
}
if (DownloadPackedObject(pm, id))
{
return;
}
}
List <WalkRemoteObjectDatabase> al = ExpandOneAlternate(id, pm);
if (al != null && al.Count > 0)
{
foreach (WalkRemoteObjectDatabase alt in al)
{
_remotes.Add(alt);
_noPacksYet.AddLast(alt);
_noAlternatesYet.AddLast(alt);
}
continue;
}
List <Exception> failures = null;
if (_fetchErrors.ContainsKey(id.Copy()))
{
failures = _fetchErrors[id.Copy()];
}
TransportException te = null;
if (failures != null && failures.Count > 0)
{
te = failures.Count == 1 ?
new TransportException("Cannot get " + id.Name + ".", failures[0]) :
new TransportException("Cannot get " + id.Name + ".", new CompoundException(failures));
}
if (te == null)
{
te = new TransportException("Cannot get " + id.Name + ".");
}
throw te;
}
}