private static boolean doSendViaC2dm(
String message, String sender, C2DMessaging push, String collapseKey, DeviceInfo deviceInfo) {
// Trim message if needed.
if (message.length() > 1000) {
message = message.substring(0, 1000) + "[...]";
}
return push.sendNoRetry(
deviceInfo.getDeviceRegistrationID(), collapseKey, "sender", sender, "message", message);
}
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
resp.setContentType("text/plain");
// Basic XSRF protection
if (req.getHeader("X-Same-Domain") == null) {
// TODO: Enable at consumer launch
// resp.setStatus(400);
// resp.getWriter().println(ERROR_STATUS + " (Missing X-Same-Domain header)");
// return;
}
String deviceRegistrationID = req.getParameter("devregid");
if (deviceRegistrationID == null) {
resp.setStatus(400);
resp.getWriter().println(ERROR_STATUS + "(Must specify devregid)");
return;
}
User user = checkUser(req, resp, true);
if (user != null) {
Key key = KeyFactory.createKey(DeviceInfo.class.getSimpleName(), user.getEmail());
DeviceInfo device = new DeviceInfo(key, deviceRegistrationID);
// Context-shared PMF.
PersistenceManager pm = C2DMessaging.getPMF(getServletContext()).getPersistenceManager();
try {
pm.makePersistent(device);
resp.getWriter().println(OK_STATUS);
} catch (Exception e) {
resp.setStatus(500);
resp.getWriter().println(ERROR_STATUS + " (Error registering device)");
log.warning("Error registering device.");
} finally {
pm.close();
}
}
}
public static String sendMessage(ServletContext context, String recipient, String message) {
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
UserService userService = UserServiceFactory.getUserService();
User user = userService.getCurrentUser();
String sender = "nobody";
if (user != null) {
sender = user.getEmail();
}
log.info("sendMessage: sender = " + sender);
log.info("sendMessage: recipient = " + recipient);
log.info("sendMessage: message = " + message);
// ok = we sent to at least one device.
boolean ok = false;
// Send push message to phone
C2DMessaging push = C2DMessaging.get(context);
boolean res = false;
String collapseKey = "" + message.hashCode();
// delete will fail if the pm is different than the one used to
// load the object - we must close the object when we're done
List<DeviceInfo> registrations = null;
registrations = DeviceInfo.getDeviceInfoForUser(recipient);
log.info("sendMessage: got " + registrations.size() + " registrations");
// Deal with upgrades and multi-device:
// If user has one device with an old version and few new ones -
// the old registration will be deleted.
if (registrations.size() > 1) {
// Make sure there is no 'bare' registration
// Keys are sorted - check the first
DeviceInfo first = registrations.get(0);
Key oldKey = first.getKey();
if (oldKey.toString().indexOf("#") < 0) {
// multiple devices, first is old-style.
registrations.remove(0); // don't send to it
pm.deletePersistent(first);
}
}
int numSendAttempts = 0;
for (DeviceInfo deviceInfo : registrations) {
if (!"ac2dm".equals(deviceInfo.getType())) {
continue; // user-specified device type
}
res = doSendViaC2dm(message, sender, push, collapseKey, deviceInfo);
numSendAttempts++;
if (res) {
ok = true;
}
}
if (ok) {
return "Success: Message sent";
} else if (numSendAttempts == 0) {
return "Failure: User " + recipient + " not registered";
} else {
return "Failure: Unable to send message";
}
} catch (Exception e) {
return "Failure: Got exception " + e;
} finally {
pm.close();
}
}