JSAGA

The following code throws null pointer exception:

import java.io.*;
import java.util.Scanner;
import org.gridforum.jgss.*;
import org.ietf.jgss.GSSCredential;
import org.ogf.saga.context.*;
import org.ogf.saga.namespace.*;
import org.ogf.saga.session.*;
import org.ogf.saga.url.*;
import fr.in2p3.jsaga.adaptor.security.VOMSContext;

public class InMemoryVOMS {
    public static void main(String[] args) throws Exception {
        URL url = URLFactory.createURL("srm://se.hpc.iit.bme.hu/dpm/hpc.iit.bme.hu/home/hungrid"); 
        Session session = SessionFactory.createSession(false);
        Context ctx = ContextFactory.createContext("VOMS");
        ctx.setAttribute(Context.SERVER,"voms://grid11.kfki.hu:15000");
        ctx.setAttribute(Context.USERVO,"hungrid");
        ctx.setAttribute(Context.USERPROXY, contentOf("x509up_voms"));
        ctx.setAttribute(Context.CERTREPOSITORY, ".globus/certificates");
        ctx.setAttribute(VOMSContext.VOMSDIR, ".globus/vomsdir");
        ctx.setVectorAttribute("BaseUrlIncludes", new String[] {"srm://se.hpc.iit.bme.hu"});

        // with the above works, but now we replace proxy with in-memory proxy... [https://forge.in2p3.fr/boards/11/topics/458?r=465]
        String proxy = ctx.getAttribute(Context.USERPROXY);
        ctx.removeAttribute(Context.USERPROXY);
        ExtendedGSSManager manager = (ExtendedGSSManager) ExtendedGSSManager.getInstance();
        GSSCredential cred = manager.createCredential(
                        proxy.getBytes(),
                        ExtendedGSSCredential.IMPEXP_OPAQUE,
                        GSSCredential.DEFAULT_LIFETIME,
                        null, // use default mechanism: GSI
                        GSSCredential.INITIATE_AND_ACCEPT);
        ctx.setAttribute("UserProxyObject", fr.in2p3.jsaga.adaptor.security.impl.InMemoryProxySecurityCredential.toBase64(cred));
        session.addContext(ctx);

        NSDirectory dir = NSFactory.createNSDirectory(session, url);
        for (URL dirEntry: dir.list()) System.out.println(dirEntry.getPath());
        dir.close();
    }
    private static String contentOf(String fileName) throws FileNotFoundException {
        Scanner scanner = new Scanner(new File(fileName));
        scanner.useDelimiter("\\Z");
        StringBuilder sb = new StringBuilder();
        while (scanner.hasNext()) sb.append(scanner.next());    
        return sb.toString();
    }
}

The stack trace:

12:49:42,546 WARN  [SagaFactoryImpl:81] Failed to load engine properties, using defaults [.\etc\jsaga-config.properties (The system cannot find the path specified)]
Exception in thread "main" NoSuccess: java.lang.NullPointerException
    at fr.in2p3.jsaga.adaptor.security.VOMSSecurityAdaptor.createSecurityCredential(VOMSSecurityAdaptor.java:208)
    at fr.in2p3.jsaga.impl.context.ContextImpl.createCredential(ContextImpl.java:282)
    at fr.in2p3.jsaga.impl.session.SessionImpl.addContext(SessionImpl.java:63)
    at InMemoryVOMS.main(InMemoryVOMS.java:34)
Caused by: java.lang.NullPointerException
    at java.io.File.<init>(File.java:222)
    at fr.in2p3.jsaga.adaptor.security.VOMSSecurityCredential.<init>(VOMSSecurityCredential.java:47)
    at fr.in2p3.jsaga.adaptor.security.VOMSSecurityAdaptor.createSecurityAdaptor(VOMSSecurityAdaptor.java:246)
    at fr.in2p3.jsaga.adaptor.security.VOMSSecurityAdaptor.createSecurityCredential(VOMSSecurityAdaptor.java:176)
    ... 3 more