Multi-Threading

[Damien Lust]

Hello,

I developed an Client-Server application on the web, with a search  
module using Lucene. In the same application, the users can index new  
text.

So, multiple sessions can acces to the Index and concurrences problems  
can be possible.

I used Threads in Java. Is it the best solutions?

I call :

IndexFiles indexFiles = new IndexFiles();
indexFiles.run();
Here you are an extract of my code.

Thanks.

public class IndexFiles extends Thread{
    public IndexFiles(){
    }
    public void run(){
             
SynchronizedIndexWriter.insertDocument(currentIndexDocument(),"tmp/ 
IndexPath",new MainAnalyser());
    }

}



public class SynchronizedIndexWriter {

    static synchronized  void insertDocument(IndexDocument  
document,String indexLocValue,Analyzer analyzerValue){
        File f=new File(indexLocValue);
        if (f.exists())  
addDocumentToIndex(document,indexLocValue,analyzerValue,false);
        else  
addDocumentToIndex(document,indexLocValue,analyzerValue,true);
    }

    static  synchronized void addDocumentToIndex(IndexDocument  
document,String indexLocValue,Analyzer analyzerValue,boolean  
createNewIndex){
        try{
            IndexWriter indexWriter = new  
IndexWriter(indexLocValue,analyzerValue,createNewIndex);
            indexWriter.addDocument(document.getDocument());
            indexWriter.optimize();
            indexWriter.close();
        }
        catch(IOException io){
	    // If IndexWrite don't know write on index because it's locked,  
recall of the function
              => It's not very safe
             
addDocumentToIndex(document,indexLocValue,analyzerValue,createNewIndex);
        }
        catch(Exception e){

        }

    }
}