Trouble W/ NullPointerException
Having trouble with a NPE. I'm sure this is something simple
jboss4.2.1
seam 2.0 +
@Stateful
@Name("uploadAction")
@Scope(ScopeType.SESSION)
public class FileUploadAction implements FileUploadLocal{
@PersistenceContext
private EntityManager em;
@Out(scope=ScopeType.CONVERSATION, required=false)
FtpRemote send;
private String medianame;
private Long size;
.
.
.
public void UploadFile() throws NullPointerException {
if(!medianame.equals("")){
try{
// create empty file with specified name and path
File os = new File("/var/temp/filewritetemp/"+getMediaName());
FileOutputStream oStream =new FileOutputStream(os);
oStream.write(getIs());
File file = new File("/var/temp/filewritetemp/" + getMediaName());
size = file.length();
dob = new Date();
fis = new FileInputStream("/var/temp/filewritetemp/" + getMediaName());
try{
ftpFile(fis);
}catch (Exception e){
e.printStackTrace();
}
.
.
.
}
public void ftpFile(FileInputStream fis){
send = new FtpRemote();
send.findServer(fis);
}
...which calls
@Stateless
@Name("ftpRemote")
public class FtpRemote implements FtpRemoteLocal {
private String login;
.
.
.
@In
EntityManager em;
@In(required=false)
@Out(required=false)
ReturnServer host;
public void findServer(FileInputStream fis){
host = new ReturnServer();
....and it breaks just before the query
@Stateless
public class ReturnServer
{
@In
EntityManager em;
private String server;
private ArrayList<Server> serverlist;
.
.
.
@In(create=true)
private ServerList result;
public String findServer(){
queryServer();
requestServer();
return server;
}
@SuppressWarnings("unchecked")
public void queryServer() {
System.out.println("made it to -- line before QUERY");
List<Server> resultList = em.createQuery("select s from " +
"Server s where s.status = 'online' order by s.usedspace desc")
.setMaxResults(5).setFirstResult(0).getResultList();
System.out.println("made it to -- line after QUERY");
serverlist = new ArrayList(resultList.subList(0, resultList.size()));
}
I've convinced myself that this is a fundamental misunderstanding EJB3 annotations. I'm just not sure how to fix it.
[q22:35:16,598 INFO [STDOUT] made it to -- line before QUERY 22:35:16,598 ERROR [STDERR] java.lang.NullPointerException 22:35:16,599 ERROR [STDERR] at com.dcg.action.ReturnServer.queryServer(ReturnServer.java:66) 22:35:16,599 ERROR [STDERR] at com.dcg.action.ReturnServer.findServer(ReturnServer.java:41)
any direction would be greatly appreciated.
