/*
* Reset address book data. Replace local with remote contact data, but
* preserve non-Yahoo related contact fields. Also, remove all local
* contacts which have been deleted remotely, and reset sync state.
*
* Reset is done after a metadata version change or irrecoverable sync
* error. Reset does not depend on metadata format since the data is
* completely replaced.
*/
private void reset() throws IOException, YabException, ServiceException {
// Fetch all remote contacts and merge with local data
Mailbox mbox = localData.getMailbox();
contactChanges = Collections.emptyMap();
SyncRequest req = getSyncRequest(0);
SyncResponse res = (SyncResponse) req.send();
mbox.lock.lock();
try {
processContactResults(req.getEvents());
List<SyncResponseEvent> events = res.getEvents();
if (!events.isEmpty()) {
// Categories are not returned unless there are contact changes
processEvents(events);
processCategories(res.getCategories());
}
// Remove contacts which no longer exist remotely
localData.deleteMissingContacts(getRemoteIds(events));
SyncState ss = new SyncState();
// Save new sync state
ss.setLastRevision(String.valueOf(res.getRevision()));
ss.setLastModSequence(mbox.getLastChangeID());
localData.saveState(ss);
} finally {
mbox.lock.release();
}
}
public void sync() throws IOException, YabException, ServiceException {
SyncState ss = localData.loadState();
if (ss == null) {
LOG.info("Sync state version change - resetting contact data");
reset();
return;
}
Mailbox mbox = localData.getMailbox();
SyncRequest req;
mbox.lock.lock();
try {
getLocalChanges(ss);
ss.setLastModSequence(mbox.getLastChangeID());
req = getSyncRequest(getLastRevision(ss));
} finally {
mbox.lock.release();
}
while (req != null) {
SyncResponse res = (SyncResponse) req.send();
mbox.lock.lock();
try {
getLocalChanges(ss);
ss.setLastRevision(String.valueOf(res.getRevision()));
processContactResults(req.getEvents());
List<SyncResponseEvent> events = res.getEvents();
if (!events.isEmpty()) {
// Categories are not returned unless there are contact changes
processEvents(events);
processCategories(res.getCategories());
}
ss.setLastModSequence(mbox.getLastChangeID());
localData.saveState(ss);
req = hasLocalChanges() ? getSyncRequest(res.getRevision()) : null;
} finally {
mbox.lock.release();
}
}
}
private static int getLastRevision(SyncState ss) {
String s = ss.getLastRevision();
return s != null ? Integer.parseInt(s) : 0;
}
private void getLocalChanges(SyncState ss) throws ServiceException {
contactChanges = localData.getContactChanges(ss.getLastModSequence());
LOG.debug("Found %d local contact changes", contactChanges.size());
}