The tag has no usage guidance.

learn more… | top users | synonyms

4
votes
2answers
88 views

Understanding the Single-Writer Principle

The article on the Single-Writer Principle of the Mechanical Sympathy blog explains how bad queues are (performance-wise), because they need to be able to receive messages from multiple produers, and ...
-2
votes
0answers
21 views

How would one go about creating a bi-directional sync between a CRM and a website?

I am a business user that would like to understand in layman's terms how this works. I would like some of my users to update their information in our CRM system (Salesforce.com) and other users to ...
4
votes
2answers
118 views

A simple approach for data synchronisation

I want to synchronise the local database of mobile devices with the server's database. This synchronisation will happen for example when user comes online, to update the local as well as the remote ...
1
vote
1answer
88 views

Setting up my inheritance model?

I'm working on refactoring a synchronization web app that our company uses. Currently it's merely a set of controllers that fire up a set of helpers that go through a long chain of if-else type ...
1
vote
3answers
62 views

Best approach for realtime sync + shared todo?

I'm implementing an app that has among other things shared todo lists. I want it to sync in real time. This has to work for "normal" single user items (e.g. user has app opened in 2 devices, doing an ...
2
votes
1answer
27 views

Mechanisms to ensure distributed systems do not sychchronize (anti-synchronize)

We have a service that based on a local timer does a GET request to our server on Azure to transmit some information to be saved on the server. At this stage we are only testing and we are finding ...
2
votes
1answer
102 views

Conflict resolution for two-way sync offline sync

How do you manage two-way synchronization between a 'main' database server and many 'secondary' servers, in particular conflict resolution, assuming a connection is not always available(offline ...
3
votes
2answers
94 views

Best way to develop new features as well as fix any bugs for a web system on Windows [closed]

I'm a one-man band and I have a contract with a client to develop and maintain a web-based system that is relied upon. This is the first project of this size and type that I have done for anyone else ...
31
votes
5answers
4k views

No central database

I have a client that is looking to get a website/mobile apps/desktop apps built that deal with very sensitive data (more sensitive than bank/card details). Because of the sensitive nature of the data, ...
1
vote
1answer
133 views

Synchronize database with external API

I currently own a website where players can look-up their statistics of a game. When someone that is not in my database yet requests their statistics, I am calling the API with a PHP cURL request and ...
0
votes
1answer
67 views

Non-synchronized method that calls synchronized methods only [closed]

Is it safe to make a non-synchronized method if it only calls synchronized methods? Say we have: public class SomeClass{ public synchronized void A(){ //Some code } public ...
1
vote
2answers
262 views

What's the best way to track updates when syncing data from MySQL remote server to local SQLite database?

I'm making an iOS App, well, two actually. App A will be able to write TO-DOs to a remote MySQL database, and App B will be able to read what App A has written/modified. App B needs to be always ...
0
votes
2answers
2k views

Best way to synchronize data between two different databases

I have to implement data synchronization between two big databases which have completely different structures. Basically, I need to grap some data about products in different tables in the first ...
1
vote
3answers
1k views

Can multiple synchronized methods in same object run concurrently

As far as i know when there are multiple synchronized methods(both static and instance) in a class, java allows only one such method to run at a time. But what if a thread acquires lock on an object ...
5
votes
0answers
72 views

Explicit DAG instead of Vector Clocks for synchronisation

I've started looking at approaches to data synchronisation among a set of peers. The peers must be able to work in a disconnected way and then synchronise together to merge their local changes. Peers ...
3
votes
2answers
394 views

Do I need a web-service for this case? Data-synchronization over multiple clients

I'm new in this area and a little bit confused about my current thoughts on a web-service implementation for my application. I want to synchronize all connected clients with the current data on a ...
3
votes
1answer
73 views

Synchronization of resource that has moved out of requests filter range

I have a RESTful API with corresponding clients. If a client request fetches a set of resources (Events) based on a filter, say events taking place between 2015-04-13 - 2015-04-19. If an event which ...
1
vote
0answers
117 views

Is Event sourcing a good fit for database sync (master-multiple-slaves)?

I'm looking for a good way to maintain in sync local sqlite databases that could be offline to a master one, for a invoice app. Then I read about EventSourcing and Log structured storage and wonder ...
2
votes
2answers
63 views

Perfect time synchonization betweeen devices

I want to make two devices synchronize metronome over bluetooth/wifi. However I've got no idea how to make it perfectly synchronized. There are two possible solutions that I've found out: Naive -> ...
-2
votes
1answer
104 views

VCS a Vagrant box [closed]

I have two computers (1 Laptop with Ubuntu that I use for development in 99% of my time but I also have a pretty much unused PC with Windows. I also have an unused server machine at home. I would like ...
1
vote
2answers
227 views

Best Way To Store Images For Mobile Synchronization

The scenario is, I have a Web Dashboard (Developed using PHP + MySQL) and have Android and iOS Apps synchronizing data from the Web Dashboard (only one way i.e. Dashboard to Mobile Apps) Now the ...
3
votes
4answers
338 views

What's the best way to synchronise an event over multiple processes?

Imagine I have two distinct OS processes (the actual OS is unimportant). Process A is responsible for playing a video file. Process B is responsible for playing the audio that accompanies the video ...
-1
votes
1answer
200 views

Approaches for manage AD users inside my HR system [closed]

I want to start a new HR web application based on asp.net mvc-5 & Entity Framework. as it is almost the case Users inside the HR system will exists inside the AD, and when a new user join our ...
2
votes
5answers
449 views

A separate endpoint specifically for sync in a REST api

I am working on a multi client/single server app. Communication between the two happens via RESTful API. There are several resources that need to stay in sync across all clients, including images ...
2
votes
0answers
230 views

Syncing structured data and files in Android App with an ORM?

I am developing an Android App which I have developed for iOS before. The app requires that structured data and files are synced across android devices. In iOS, I was using Core Data and synced to ...
0
votes
1answer
404 views

Data Sync between Android apps in LAN

I am looking at developing an app which has quite an extensive database. This app will be installed on multiple devices in a LAN and all users can update the data and other users will see the data as ...
2
votes
1answer
49 views

performance issues when synchronizing on an interned String

I want to lock a remote file with the string "ip + filename" using java. public boolean execCmd(String ip,String filename, String command) { String file = ip + filename; String lock = ...
1
vote
1answer
326 views

Synchronization between two systems using MongoDB as changelog

We are developing two related system. One of them (A) will be installed in our customers' machines. The remaining (B) will be used by my organization. Each system has its own database (relational) ...
0
votes
3answers
372 views

Developing “real” synchronization [closed]

I'm currently writing a email synchronizer application that synchronizes email to a sql server database. One direction is not a problem: Fetching folders from the server (with its messages) and ...
0
votes
1answer
407 views

LDAP users synchronization [closed]

I'm looking for a way to synchronize a users database between a piece of software and a ldap directory. Currently I'm thinking of three possibilities to keep the track of a specific user : Guid : it ...
1
vote
1answer
157 views

Synchronized access to network industrial equipment

I have an industrial equipment which is controlled by a software. The software connects to it using sockets, and keeps the connection all the time alive, while from time to time sending commands to ...
0
votes
2answers
2k views

Real time data synchronization techniques between two systems

I need to come up with a design for real-time data update from a COTS product (a Point of Sales system) to a custom-built .NET application (an Inventory Management system). Particularly, any sales ...
3
votes
1answer
875 views

How to implement await in Android

This is a general question to understand how await in C# works, and particularly I am interested in implementing it in Android. So C# await allows you to go in to waiting mode in the middle of the ...
1
vote
0answers
97 views

Synchronizing web ui and third party async services

I'm looking for concepts, approaches or even Framework/libraries to help me synchronize state reliably from web UI to a third Party Service. For example: creating a JavaScript irc Client ui you need ...
3
votes
2answers
752 views

Combining asynchronous and synchronous programming

I've got trouble wrapping my head around a certain problem: In my data-flow app (a visual editor), I have both autonomous objects which communicate though ports via unordered simultaneous messages ...
2
votes
3answers
276 views

How much time should you allow for clock skew?

We are writing a B2B application that uses OAuth 2.0. Before a token expires we want to refresh it since it faster to refresh a token, than request a new one. However, we want to build in some ...
0
votes
3answers
363 views

MVC pattern synchronisation

I am facing a problem in synchronizing my model and view threads I have a view which is table. In it, user can select a few rows. I update the view as soon as the user clicks on any row since I don't ...
3
votes
2answers
750 views

Programmatically syncing with remote servers

My application generates text files that need to be synced with remote servers, which may be windows or linux. Sync has to happen without user's intervention. I tried with rsync but windows doesn't ...
1
vote
0answers
68 views

Modelling network and persistent entity representations

I have an app where I need to synchronize some entities (simply download latest versions of entities from server to client). Entity has bunch of text properties and bunch of resource links (referenced ...
0
votes
2answers
186 views

Locking techniques

Delphi RAD libraries implement many thread friendly objects in a way which forces one to declare another object for storing the reference returned by that object's locking method. The object thus ...
0
votes
1answer
899 views

sqlite trigger or application event?

I've have two event queues(table mapped queues) based on two different states of same data stored in two different tables. The events are generated on create/update/delete on both the tables. ...
0
votes
2answers
67 views

Methods to keep an external service up to date that polls your service periodically?

Sorry if the title is hard to understand, it is easier if I describe the scenario to get the question across. I have a service that collects data, performs business logic and does all the normal ...
1
vote
3answers
231 views

A pattern to “atomically” update a pair of objects

Is there a standard pattern in OOP to kind of "atomically" update a pair of objects, like a pair of bank accounts on a transaction? I would like to have somehow a single public method exposed that ...
1
vote
2answers
417 views

An algorithm for a synchronization

I want to make a synchronization. What's the algorithm for it in a nutshell? 1) A client reads a local data and sends them to a server afterwards. The server compares them with its actual data, ...
4
votes
1answer
4k views

How to make a method synchronized across all instances of an object

Today I was asked this interview question and could not answer. : If you have two instances of a Person Object and each of them have a setAddres method that is synchronized. Now if it was only one ...
1
vote
3answers
328 views

Synchronization in the given Code

I had an interview few weeks back, and I was asked to write a code with Setters and Getters. I had written the following code; // Just an example Class ABC{ private int num; public void ...
0
votes
1answer
167 views

Implementation details of database synchronisation API

I want to achieve a database synchronisation between my server database and a client application. The server would run MySQL and the applications may run different database technologies, their ...
6
votes
1answer
2k views

Solutions for iOS collaborative sync (iCloud CoreData, CouchDB)?

I'm developing an iOS app where one of the features will be allowing users to share and collaborate on data (e.g. lists). From everything I've read and based on the way that iCloud CoreData sync works ...
2
votes
2answers
510 views

Difference between mutex in windows and linux

Is that correct that a mutex object in Linux cannot be used for cross process synchronization as opposed to its Windows counterpart? If that is true - what was the idea to limit mutex synchronisation ...
0
votes
1answer
208 views

The best approach to building a mobile service that's also available when the connection drops?

Hopefully this question will be a good suit for P.SE since it is a whiteboard-level 'how can this be done' conceptual question. I'm trying to build a product that needs to be available to someone on ...