/// <summary>
/// Adds a list of updates to the query result. The XML metadata is written to disk to avoid running out of memory
/// </summary>
/// <param name="overTheWireUpdates">The updates to add to the result</param>
public void AddUpdates(IEnumerable <ServerSyncUpdateData> overTheWireUpdates)
{
foreach (var overTheWireUpdate in overTheWireUpdates)
{
var updateIdentity = new Identity(overTheWireUpdate.Id);
bool newEntryToBeAdded = false;
lock (Identities)
{
if (!Identities.Contains(updateIdentity))
{
newEntryToBeAdded = true;
}
}
if (newEntryToBeAdded)
{
// We need to parse the XML update blob
string updateXml = overTheWireUpdate.XmlUpdateBlob;
if (string.IsNullOrEmpty(updateXml))
{
// If the plain text blob is not availabe, use the compressed XML blob
if (overTheWireUpdate.XmlUpdateBlobCompressed == null || overTheWireUpdate.XmlUpdateBlobCompressed.Length == 0)
{
throw new Exception("Missing XmlUpdateBlobCompressed");
}
// Note: This only works on Windows.
updateXml = CabinetUtility.DecompressData(overTheWireUpdate.XmlUpdateBlobCompressed);
}
var xdoc = XDocument.Parse(updateXml, LoadOptions.None);
var newUpdate = Update.FromUpdateXml(updateIdentity, xdoc);
AddUpdate(newUpdate, updateXml, out var newUpdateIndex, xdoc);
}
}
}
/// <summary>
/// Adds an update to the query result. The XML metadata is written to disk to avoid running out of memory
/// </summary>
/// <param name="update">The updates to add to the result</param>
/// <param name="updateMetadata">The update metadata to add</param>
/// <param name="newUpdateIndex">The index of the new entry, if it was added to the index</param>
/// <param name="updateXmlDoc">Update XML document used to load additional data if needed</param>
/// <returns>True if a new entry was added, false otherwise</returns>
private bool AddUpdate(Update update, string updateMetadata, out int newUpdateIndex, XDocument updateXmlDoc)
{
var updateIdentity = update.Identity;
newUpdateIndex = 0;
lock (Identities)
{
if (!Identities.Contains(updateIdentity))
{
newUpdateIndex = AddUpdateEntry(update, updateXmlDoc);
var updateEntryName = GetUpdateXmlPath(updateIdentity);
OutputFile.PutNextEntry(new ZipEntry(updateEntryName));
OutputFile.Write(Encoding.UTF8.GetBytes(updateMetadata));
OutputFile.CloseEntry();
OutputFile.Flush();
return(true);
}
}
return(false);
}
private void AddUpdateBundleInformation(int newUpdateIndex, Identity newUpdateIdentity, XDocument updateXml)
{
var bundledUpdates = BundlesUpdatesParser.Parse(updateXml);
if (PendingBundledUpdates.ContainsKey(newUpdateIdentity))
{
// We've seen this update before, as bundled with other updates
// Now that we have an update for it, adds its bundling information
IsBundledTable.Add(newUpdateIndex, PendingBundledUpdates[newUpdateIdentity]);
foreach (var newUpdateParentBundleIndex in PendingBundledUpdates[newUpdateIdentity])
{
// A bundled update that was pending before was added; add it to the parent's list of bundled updates
if (!BundlesIndex[newUpdateParentBundleIndex].Contains(newUpdateIndex))
{
BundlesIndex[newUpdateParentBundleIndex].Add(newUpdateIndex);
}
}
// Remove from list of pending updates;
PendingBundledUpdates.Remove(newUpdateIdentity);
}
else
{
// When initially added, updates are not considered bundled
// Updates become bundled when they are found within another update
IsBundledTable.Add(newUpdateIndex, new List <int>());
}
if (bundledUpdates.Count > 0)
{
var knownBundledUpdates = bundledUpdates.Where(u => Identities.Contains(u)).Select(id => this[id]);
var unknownBundledUpdates = bundledUpdates.Where(u => !Identities.Contains(u));
// Add known bundled updates
BundlesIndex.Add(
newUpdateIndex,
new List <int>(knownBundledUpdates));
// Mark all bundled updates as bundled
foreach (var bundledUpdate in knownBundledUpdates)
{
// Try to mark the bundled update as bundled by adding it to the bundled table
if (IsBundledTable.ContainsKey(bundledUpdate))
{
// An entry already exists; switch it to true now, regardless of the previous value
if (!IsBundledTable[bundledUpdate].Contains(newUpdateIndex))
{
IsBundledTable[bundledUpdate].Add(newUpdateIndex);
}
}
else
{
IsBundledTable.Add(bundledUpdate, new List <int>()
{
newUpdateIndex
});
}
}
// Add unknown bundled updates to a pending list
foreach (var bundledUpdate in unknownBundledUpdates)
{
// The bundled update was not added to the metadata collection yet. Put it on a pending list with a mapping to its parent bundle
if (PendingBundledUpdates.ContainsKey(bundledUpdate))
{
if (!PendingBundledUpdates[bundledUpdate].Contains(newUpdateIndex))
{
PendingBundledUpdates[bundledUpdate].Add(newUpdateIndex);
}
}
else
{
PendingBundledUpdates.TryAdd(bundledUpdate, new List <int>()
{
newUpdateIndex
});
}
}
}
}
