Automatic converting Word file to PDF with replace

Word Automation Services available in SharePoint 2010 supports converting Word documents to other formats. This includes PDF. 

Following MSDN article describes step-by-step how to create Event Receiver, add proper libraries and code. Unfortunately, this creates new copy of PDF file, while I wanted the file to be overwritten to the same item. 

Instead of starting a job, that creates new file, I start conversion job that overwrites the file: 

pdfConversionJob.AddFile(wordFileName, wordFileName);

This creates file in the same item, but now you won't be able to open it, since SharePoint still treats this file as Word document. It would be great, if i could just change file name in ItemUpdated receiver. Problem is, that this job does not trigger Event Receivers. 

I put a waiting loop, that waits until job is finished (or until timeout passes):

int finishedConversionCount = cjStatus.Succeeded + cjStatus.Failed;

while ((finishedConversionCount != 1) && ((DateTime.Now - conversionStarted) < timeSpan))

{

    // wait one minute

    System.Threading.Thread.Sleep(60000);

    cjStatus = new ConversionJobStatus(wordServiceApplicationProxy, pdfConversionJob.JobId, null);

    finishedConversionCount = cjStatus.Succeeded + cjStatus.Failed;

} 

Then I have to change the name of the file. To do this, I use MoveTo method:

SPFile wordFile = properties.ListItem.File;

wordFile.MoveTo(pdfFileName, true);

The full Event Receiver code can be found here.

Sources:
[1] Developing with SharePoint 2010 Word Automation Services,
[2] Using SharePoint 2010 Word Automation Services to convert document synchronously