[jboss-user] [JBoss Seam] - Trouble W/ NullPointerException

[nathandennis]

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. 

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