/// <summary>
/// Call back to Add File Transfer for new Cab and add new Cab to Media table
/// This callback can come from Multiple Cabinet Builder Threads and so should be thread safe
/// This callback will not be called in case there is no File splitting. i.e. MaximumCabinetSizeForLargeFileSplitting was not authored
/// </summary>
/// <param name="firstCabName">The name of splitting cabinet without extention e.g. "cab1".</param>
/// <param name="newCabName">The name of the new cabinet that would be formed by splitting e.g. "cab1b.cab"</param>
/// <param name="fileToken">The file token of the first file present in the splitting cabinet</param>
internal void NewCabNamesCallBack([MarshalAs(UnmanagedType.LPWStr)] string firstCabName, [MarshalAs(UnmanagedType.LPWStr)] string newCabName, [MarshalAs(UnmanagedType.LPWStr)] string fileToken)
{
// Locking Mutex here as this callback can come from Multiple Cabinet Builder Threads
Mutex mutex = new Mutex(false, "WixCabinetSplitBinderCallback");
try
{
if (!mutex.WaitOne(0, false)) // Check if you can get the lock
{
// Cound not get the Lock
Messaging.Instance.OnMessage(WixVerboses.CabinetsSplitInParallel());
mutex.WaitOne(); // Wait on other thread
}
string firstCabinetName = firstCabName + ".cab";
string newCabinetName = newCabName;
bool transferAdded = false; // Used for Error Handling
// Create File Transfer for new Cabinet using transfer of Base Cabinet
foreach (FileTransfer transfer in this.FileTransfers)
{
if (firstCabinetName.Equals(Path.GetFileName(transfer.Source), StringComparison.InvariantCultureIgnoreCase))
{
string newCabSourcePath = Path.Combine(Path.GetDirectoryName(transfer.Source), newCabinetName);
string newCabTargetPath = Path.Combine(Path.GetDirectoryName(transfer.Destination), newCabinetName);
FileTransfer newTransfer;
if (FileTransfer.TryCreate(newCabSourcePath, newCabTargetPath, transfer.Move, "Cabinet", transfer.SourceLineNumbers, out newTransfer))
{
newTransfer.Built = true;
this.fileTransfers.Add(newTransfer);
transferAdded = true;
break;
}
}
}
// Check if File Transfer was added
if (!transferAdded)
{
throw new WixException(WixErrors.SplitCabinetCopyRegistrationFailed(newCabinetName, firstCabinetName));
}
// Add the new Cabinets to media table using LastSequence of Base Cabinet
Table mediaTable = this.Output.Tables["Media"];
Table wixFileTable = this.Output.Tables["WixFile"];
int diskIDForLastSplitCabAdded = 0; // The DiskID value for the first cab in this cabinet split chain
int lastSequenceForLastSplitCabAdded = 0; // The LastSequence value for the first cab in this cabinet split chain
bool lastSplitCabinetFound = false; // Used for Error Handling
string lastCabinetOfThisSequence = String.Empty;
// Get the Value of Last Cabinet Added in this split Sequence from Dictionary
if (!this.lastCabinetAddedToMediaTable.TryGetValue(firstCabinetName, out lastCabinetOfThisSequence))
{
// If there is no value for this sequence, then use first Cabinet is the last one of this split sequence
lastCabinetOfThisSequence = firstCabinetName;
}
foreach (MediaRow mediaRow in mediaTable.Rows)
{
// Get details for the Last Cabinet Added in this Split Sequence
if ((lastSequenceForLastSplitCabAdded == 0) && lastCabinetOfThisSequence.Equals(mediaRow.Cabinet, StringComparison.InvariantCultureIgnoreCase))
{
lastSequenceForLastSplitCabAdded = mediaRow.LastSequence;
diskIDForLastSplitCabAdded = mediaRow.DiskId;
lastSplitCabinetFound = true;
}
// Check for Name Collision for the new Cabinet added
if (newCabinetName.Equals(mediaRow.Cabinet, StringComparison.InvariantCultureIgnoreCase))
{
// Name Collision of generated Split Cabinet Name and user Specified Cab name for current row
throw new WixException(WixErrors.SplitCabinetNameCollision(newCabinetName, firstCabinetName));
}
}
// Check if the last Split Cabinet was found in the Media Table
if (!lastSplitCabinetFound)
{
throw new WixException(WixErrors.SplitCabinetInsertionFailed(newCabinetName, firstCabinetName, lastCabinetOfThisSequence));
}
// The new Row has to be inserted just after the last cab in this cabinet split chain according to DiskID Sort
// This is because the FDI Extract requires DiskID of Split Cabinets to be continuous. It Fails otherwise with
// Error 2350 (FDI Server Error) as next DiskID did not have the right split cabinet during extraction
MediaRow newMediaRow = (MediaRow)mediaTable.CreateRow(null);
newMediaRow.Cabinet = newCabinetName;
newMediaRow.DiskId = diskIDForLastSplitCabAdded + 1; // When Sorted with DiskID, this new Cabinet Row is an Insertion
newMediaRow.LastSequence = lastSequenceForLastSplitCabAdded;
// Now increment the DiskID for all rows that come after the newly inserted row to Ensure that DiskId is unique
foreach (MediaRow mediaRow in mediaTable.Rows)
{
// Check if this row comes after inserted row and it is not the new cabinet inserted row
if (mediaRow.DiskId >= newMediaRow.DiskId && !newCabinetName.Equals(mediaRow.Cabinet, StringComparison.InvariantCultureIgnoreCase))
{
mediaRow.DiskId++; // Increment DiskID
}
}
// Now Increment DiskID for All files Rows so that they refer to the right Media Row
foreach (WixFileRow wixFileRow in wixFileTable.Rows)
{
// Check if this row comes after inserted row and if this row is not the file that has to go into the current cabinet
// This check will work as we have only one large file in every splitting cabinet
// If we want to support splitting cabinet with more large files we need to update this code
if (wixFileRow.DiskId >= newMediaRow.DiskId && !wixFileRow.File.Equals(fileToken, StringComparison.InvariantCultureIgnoreCase))
{
wixFileRow.DiskId++; // Increment DiskID
}
}
// Update the Last Cabinet Added in the Split Sequence in Dictionary for future callback
this.lastCabinetAddedToMediaTable[firstCabinetName] = newCabinetName;
mediaTable.ValidateRows(); // Valdiates DiskDIs, throws Exception as Wix Error if validation fails
}
finally
{
// Releasing the Mutex here
mutex.ReleaseMutex();
}
}