[jboss-user] [EJB 3.0] - entitymanager flush is not flushing
Hi,
I'm new to jboss and ejb. I am trying to have the EntityManager update the database
immediately versus waiting until the code completes. I tried using flush, but the
database does not get updated until after the code completes. Any ideas?
Watcher.java
@Stateless
@Clustered
public class Watcher
implements WatcherIntLocal, WatcherIntRemote
{
@Resource
private SessionContext context;
@PersistenceContext (unitName="WatcherDB")
private EntityManager em;
public void checkForNewFiles() throws WatcherException
{
try
{
List validFiles = findValidFiles();
addToQueue(validFiles);
}
catch (Throwable e)
{
e.printStackTrace();
throw new WatcherException(e);
}
}
public List findValidFiles() throws WatcherException
{
//iterate thru a list of files and search for certain extensions
//if the file name matches those extensions, call insert
}
public void insert(File file)
{
em.persist(file);
em.flush();
}
public void addToQueue(List validFiles) throws WatcherException
{
// iterate thru files
//create a TextMessage using the file name
//send the message
}
}
==================================
Fetcher.java
public class Fetcher
implements MessageListener
{
@Resource
private MessageDrivenContext context;
@PersistenceContext (unitName="WatcherDB")
private EntityManager em;
public void onMessage(Message arg0) {
String fileName = ((TextMessage)arg0).getText();
File remoteFile = (File)em.createQuery("from File where
fileName=:filename").setParameter("filename",fileName).getSingleResult();
//check disk space to make sure there is enough space to put the file
transfer(remotefile,localfile);
remoteFile.setStatus("COMPLETE");
em.merge(remoteFile);
em.flush();
}
public void transfer(File remoteFile, File localFile)
{
remoteFile.setStatus("RUNNING");
em.merge(remoteFile);
em.flush();
}
}
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