Examples with Transaction com.google.firebase.database.Transaction used on opensource projects

Example 1 with Transaction

use of com.google.firebase.database.Transaction in project MadMax by deviz92.

the class User method joinGroup.

public void joinGroup(String groupID, String inviterUID) {
    final DatabaseReference databaseReference = FirebaseUtils.getDatabaseReference();
    final String currentUID = this.getID();
    //Aggiungo gruppo alla lista gruppi dello user
    databaseReference.child("users").child(currentUID).child("groups").push();
    databaseReference.child("users").child(currentUID).child("groups").child(groupID).setValue("true");
    //Aggiungo user (con sottocampi admin e timestamp) alla lista membri del gruppo
    databaseReference.child("groups").child(groupID).child("members").push();
    databaseReference.child("groups").child(groupID).child("members").child(currentUID).push();
    databaseReference.child("groups").child(groupID).child("members").child(currentUID).child("admin").setValue(false);
    databaseReference.child("groups").child(groupID).child("members").child(currentUID).push();
    String timestamp = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss").format(new java.util.Date());
    databaseReference.child("groups").child(groupID).child("members").child(currentUID).child("timestamp").setValue(timestamp);
    // aggiunto da riky
    databaseReference.child("groups").child(groupID).child("members").child(currentUID).push();
    databaseReference.child("groups").child(groupID).child("members").child(currentUID).child("deleted").setValue(false);
    // aggiungo l'invitante agli amici se non lo è già
    if (!userFriends.containsKey(inviterUID)) {
        //todo aggiungere l'invitato tra gli amici dell'invitante
        addFriend(inviterUID);
    }
    //Incremento il numero di partecipanti
    databaseReference.child("groups").child(groupID).child("numberMembers").runTransaction(new Transaction.Handler() {

        @Override
        public Transaction.Result doTransaction(MutableData mutableData) {
            Integer numberMembers = mutableData.getValue(Integer.class);
            if (numberMembers == null) {
                return Transaction.success(mutableData);
            }
            // Set value and report transaction success
            mutableData.setValue(numberMembers + 1);
            return Transaction.success(mutableData);
        }

        @Override
        public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) {
            // Transaction completed
            Log.d(TAG, "postTransaction:onComplete:" + databaseError);
        }
    });
}

Example 2 with Transaction

use of com.google.firebase.database.Transaction in project pratilipi by Pratilipi.

the class FirebaseApi method updateUserNotificationData.

public static void updateUserNotificationData(Long userId, final List<Long> notifIdListToAdd, final List<Long> notifIdListToRemove, final Async async) {
    initialiseFirebase();
    DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference().child(DATABASE_NOTIFICATION_TABLE).child(userId.toString());
    databaseReference.runTransaction(new Transaction.Handler() {

        @Override
        public Transaction.Result doTransaction(MutableData mutableData) {
            // Current list of notificationIds with Firebase
            List<Long> notifIdList = new LinkedList<>();
            if (mutableData.getValue() != null) {
                NotificationDB notifDB = mutableData.getValue(NotificationDB.class);
                if (notifDB.getNewNotificationCount() > 0)
                    notifIdList = notifDB.getNotificationIdList();
            }
            // Add/Remove notificationIds
            // Remove ids first to avoid duplicates
            notifIdList.removeAll(notifIdListToAdd);
            notifIdList.removeAll(notifIdListToRemove);
            notifIdList.addAll(notifIdListToAdd);
            // Updating Firebase
            mutableData.setValue(new NotificationDB(notifIdList));
            return Transaction.success(mutableData);
        }

        @Override
        public void onComplete(DatabaseError databaseError, boolean committed, DataSnapshot dataSnapshot) {
            if (committed) {
                // Transaction successful
                async.exec();
            //				} else if( databaseError == null ) { // Transaction aborted
            } else {
                // Transaction failed
                logger.log(Level.SEVERE, "Transaction failed with error code : " + databaseError.getCode());
            }
        }
    });
}