private boolean hasUIDL() throws IOException {
if (connection.hasCapability(Pop3Capabilities.UIDL)) {
return true;
}
// Additional check for servers that don't support CAPA
// (i.e. Hotmail) but do support UIDL.
try {
if (connection.getMessageCount() > 0) {
// Only need to test UIDL on first message
connection.getMessageUid(1);
} else {
connection.getMessageUids();
}
} catch (CommandFailedException e) {
return false;
}
return true;
}
private void fetchAndRetainMessages() throws Exception {
String[] uids = connection.getMessageUids();
Set<String> existingUids = PopMessage.getMatchingUids(dataSource, uids);
int count = uids.length - existingUids.size();
LOG.info("Found %d new message(s) on remote server", count);
if (count == 0) {
return; // No new messages
}
IOExceptionHandler.getInstance().resetSyncCounter(mbox);
boolean checkForSelfPopping = true;
for (int msgno = uids.length; msgno > 0; --msgno) {
String uid = uids[msgno - 1];
if (!existingUids.contains(uid)) {
if (checkForSelfPopping) {
// Only check new messages else could match one we previously synced.
if (poppingSelf(uid)) {
throw ServiceException.INVALID_REQUEST(
"User attempted to import messages from his own mailbox", null);
}
checkForSelfPopping = false; // Only need to check one message
}
LOG.debug("Fetching message with uid %s", uid);
IOExceptionHandler.getInstance().trackSyncItem(mbox, msgno);
// Don't allow filtering to a mountpoint when retaining the
// message. We don't have a local id, so we can't keep track
// of it in the data_source_item table.
try {
fetchAndAddMessage(msgno, connection.getMessageSize(msgno), uid, false);
} catch (Exception e) {
if (IOExceptionHandler.getInstance().isRecoverable(mbox, msgno, "pop sync fail", e)) {
// skip it; will be retried on every subsequent sync
continue;
}
throw e;
}
}
}
IOExceptionHandler.getInstance().checkpointIOExceptionRate(mbox);
}