Setting up SVNKit when multithreading

Question

I'm trying to connect to many SVN repositories in parallel, using different threads, with SVNKit.

Looking at some code examples online, it looks like before using SVNKit I have to initialize it using the static methods

DAVRepositoryFactory.setup();
SVNRepositoryFactoryImpl.setup();
FSRepositoryFactory.setup();

Obviously static methods make me concerned in a multithreaded environment. My question is:

1. Is it possible to use SVNKit this way, in parallel?
2. When do I need to call these setup methods? Only at the beginning of the software, once for each thread, what?

I would also be glad if someone could explain the reason I have to call these methods.

Answer 1

You only have to call this method once, before creating repository instances in your different threads.

From SVNRepositoryFactoryImpl javadoc:

do it once in your application prior to using the library enables working with a repository via the svn-protocol (over svn and svn+ssh)

Here is an example code with 2 repositories (monothread) :

SVNRepositoryFactoryImpl.setup(); // ONCE!

String url1 = "svn://host1/path1";
SVNRepository repository1 = SVNRepositoryFactory.create(SVNURL.parseURIDecoded(url1));
String url2 = "svn://host2/path2";
SVNRepository repository2 = SVNRepositoryFactory.create(SVNURL.parseURIDecoded(url2));

In multithread environment, you can create a class implementing Runnable:

public class ProcessSVN implements Runnable {

    private String url;

    public ProcessSVN(String url) {
        this.url = url;
    }

    public void run() {
        SVNRepository repository = SVNRepositoryFactory.create(SVNURL.parseURIDecoded(url));
        // do stuff with repository
    }
}

And use it like this:

SVNRepositoryFactoryImpl.setup(); // STILL ONCE!

(new Thread(new ProcessSVN("http://svnurl1"))).start();
(new Thread(new ProcessSVN("http://svnurl2"))).start();