[vibhor]

Hi All,

I am implementing a simple program that needs to check the inbox for emails with a given subject.

To achieve this, I get a handle of the inbox and attach a listener to it. Whenever a new mail arrives at the inbox, the messagesAdded(FolderEvent e) event is called.

The code works fine in simulated environment and has been tested on handheld simulators for versions 3.6 to 4.0. But it fails on a real handheld. Even if a new mail arrives the listener is not notified. No exception is thrown either.

I am attaching code snippets below. Any help will be really appreciated.

-Code Snippet BEGIN-
...
Store store = Session.getDefaultInstance().getStore();
Folder[] folders = store.list(Folder.INBOX);
Folder inbox = folders[0];
inbox.addFolderListener(this);
...
public synchronized void messagesAdded(FolderEvent e){
Message msg = e.getMessage();
//take some action
}
-Code Snippet END-

Thanks
Vibhor

[phil999]

Is your app signed using the RIM keys as without them you cannot use the mail api on the device. It is a secure API.

[vibhor]

Hi Phil,

The app is signed.

I tried another approach wherein I am polling the inbox every 30 seconds and checking the mails with a particular subject. The polling is happening fine (logs whenever the thread wakes up) but it does not seem to scan the inbox. No exceptions are thrown either.

It is being tested on 7750 Verizon
Platform 1.5.0.30
App/OS version: 4.0.0.171

You could try out the following piece of code -
import net.rim.blackberry.api.mail.Session;
import net.rim.blackberry.api.mail.Folder;
import net.rim.blackberry.api.mail.Store;
import net.rim.blackberry.api.mail.event.FolderEvent;
import net.rim.blackberry.api.mail.event.FolderListener;
import net.rim.blackberry.api.mail.Message;
import net.rim.device.api.system.EventLogger;

public class Example extends Thread
{
public static final String SUBJECT = "<SUBJECT>";

public static final int SLEEP_TIME = 10 * 1000;

/**
* Id required for Event logging.
* Key is: Example
*/
private long guid = 0x52ae3a156ed010fL;

public Example()
{
EventLogger.register(guid, "Example", EventLogger.VIEWER_STRING);
EventLogger.setMinimumLevel(EventLogger.INFORMATI ON);

EventLogger.logEvent(guid, "Example Poll Agent Started".getBytes(), EventLogger.INFORMATION);
}

public void run()
{
try{
Store store = Session.getDefaultInstance().getStore();
Folder[] folders = store.list(Folder.INBOX);
Folder inbox = folders[0];
String subject = null;
while (true)
{
//Remove the message from the sent items if stored:
Message [] msgs = inbox.getMessages();
StringBuffer sb = new StringBuffer("Deleted messages: ");
for(int i=0; i < msgs.length; i++)
{
subject = msgs<i>.getSubject();
EventLogger.logEvent(guid, ("Mail Subject: "+subject).getBytes(), EventLogger.INFORMATION);
if ((subject != null) && (!subject.equals("")) && (subject.startsWith(SUBJECT)))
{
sb.append(subject).append(";");
inbox.deleteMessage(msgs<i>);
}
}
EventLogger.logEvent(guid, sb.toString().getBytes(), EventLogger.INFORMATION);
sb = null;
try{
Thread.sleep(SLEEP_TIME);
}
catch (Exception e){
EventLogger.logEvent(guid, e.toString().getBytes(), EventLogger.ERROR);
}
}
}
catch (Exception e){
EventLogger.logEvent(guid, e.toString().getBytes(), EventLogger.ERROR);
}

EventLogger.logEvent(guid, "Example Poll Agent Stopped.".getBytes(), EventLogger.INFORMATION);
}

public static void main(String[] args)
{
Example Example = new Example();
Example.start();
}
}

[mandygrewal]

I have a listener in my code that also listens for messages arriving in the Inbox with a particular subject, here's how:

publicclass MailListener implements FolderListener
{
public MailListener()
{
Session.getDefaultInstance().getStore().addFolderL istener(this);
}

public void messagesAdded(FolderEvent e)
{
Message m = e.getMessage();
if(m.isInbound() && m.getSubject().equals(MY_SUBJECT"))
{
//DO STUFF
}
}
}

Hope this helps!
Mandy

[vibhor]

Thanks a bunch Mandy. That did the trick.

It seems that listening on or polling the Inbox didnt work at all. Possible reasons could be that the actual inbox where the mails were getting added wasnt at the root level. Putting a listener on the "Store" itself was the key.

Thanks once again,
Vibhor