I'm going to develop mobile app , currently in Android, later it may change to all OS. The back end is "MS SQL Server".
Confusion is with Server side , whether to use Node js or ASP.net web API??
What the app does is - It will validate for the authenticate user and allows to Read/Write their data.
Main characteristics should be performance,scalability and accessible from all OS.
Have idea to achieve the above in two ways.
1.Using Node js, Mongo Db and tool which export/import data from MS sql server to mongo db.
2.Using ASP.Net Web API - Referring this
Please suggest which one is the best way to achieve.Thanks.
As you are using SQL Server as backend, I will suggest you to go with 2nd approach (Using Web API). It will be easy to meet all your requirements.
Here I confused with the need of mongo db in Approach 1 : You can directly connect to SQL Server from Node.js.
Related
I'm currently developing a Field-Service application that stores data in the local sqlite database on an android device. At some point, usually after completing the data collection rounds, the local sqlite db is to be synchronized to a remote sql server db on the server, also i need to update some local table from sql server db.
Any suggestions as to how this could be achieved or engineered as a solution? Or even better, are there alternatives to synchronizing data in such an application?
I think that the best is using a intermediary like web services or your own TCP based logic layer for your application which would connect to SQL server and execute requests of your applicatation. Don't try to connect to your SQL server directly from Android. You can write
some backend code on your server (or webservice) and then call those code methods from your android device using Http.
And also there are many themes in stackoverflow like your:
How to connect Android to a database server
Connecting android with MS SQL SERVER 2008
About how to write web services. It's a big question, and you must choose technology, there are very many libraries, frameworks and platforms that help you to simply write a web service. You must choose communicating protocol, it may be SOAP, WSDL or maybe remove calling procedure, it may be rest application. If you use java stack, there are some popular frameworks at the moment:
Apache CXF
Spring Web Services
Axis2
You can start from reading what a web service is:
http://en.wikipedia.org/wiki/Web_service
Also some links which provide example of accessing web services from android:
Step by step to access web service from android
Android and soap web services
Accessing restfull web service with android
Another and much easier approach is to use a Virtual JDBC Driver that relys on a secured three-tier architecture: your JDBC code is sent through HTTP to a remote Servlet that filters the JDBC code (configuration & security) before passing it to the MySql JDBC Driver. The result is sent you back through HTTP.
There are some free software that use this technique. Just Google "Android JDBC Driver over HTTP".
You would have to keep a middle tier online server.Which may communicate to and fro between your application and MSSQL db.May be servlet or a request handler which synchronises between the SQLite and SQL Server db.
I have been learning SQLite on Android and have done some tutorials on how to use it.
There is a question that I want to ask.
Is there a way to make my app connect to my MySQL database in a remote web server of mine so that it can read data and also write data to the database?
From what I've researched, SQLite cannot be used remotely and I would need some kind of Web service in between?
It's not easy to create a connection to MySQL from Android, if it's not impossible. With that, it's also not safe if for example someone decompiles your app they have access to your whole MySQL database if you don't limit it enough.
For those reasons, you can better use a (for example) PHP webservice to which the Android application sends all their requests. An example is available at http://www.helloandroid.com/tutorials/connecting-mysql-database.
I also suggest you use Android Asynchronous Http Client so you don't have to deal with connectivity issues and AsyncTasks yourself.
You can refer to this tutorial but you do need a web-server for it.
Request mechanism
Android App ----> webserver ------> database (mysql)
Respond mechanism
Android App <---- webserver <------ database (mysql)
Android App will use JSON or other to get the data and display it
You have to use Sqlite database and web Services both. First you have to save the data in local database i.e. SQLite database and then send this data to your server using web services and vice versa.
this link for web services
and this link for SQlite will help you understand.
Thanks.
I have experience building android applications but now I would like to start building applications that interact with some sort of web database to push and pull data.
What type of database should i set up on a remote server for my application to interact with? From what i understand I need a database on the remote server and some service that my android app can communicate with?
What can i read that will clear up how this works and how i can get started?
The easiest (and often most flexible) combination in my opinion is PHP and MySQL. PHP as the scripting language which is called (via http) from the app, and handles all the database access. MySQL as the database. PostgreSQL is also an option for the database, of course. And if you have access to .NET, JSP or something like that, that's also an option. But a web server with Apache, PHP and MySQL is free, powerful and easy to maintain, and most/many web hosts have them.
The way it works (which is the same no matter what kind of webbased services/servers you chose), is this:
- The database is installed on the server
- You have a web area (on the web server) which has access to the database (this is how it will be with a typical web hotel solution)
- You place your scripts (f.ex. PHP) in the web area
- The web scripts access the databse, with functions for fetching and/or storing information
- Your app uses httpclient or something similar to send http GET or POST requests to the PHP scripts, either sending information or asking for information, or both
It's also quite possible to write database access code directly in your app (this is very easy in Java and C#, compared to languages like C og C++). However, most hosts don't allow remote access to their database servers, so you'd most likely have to set up a database server yourself. Also, accessing the database server directly is a security risk, and I wouldn't recommend it.
As to what you can read, there's lots and lots of tutorials, howtos and concrete examples on the net. Search for "php access mysql databse", f.ex., for ideas on how to write php scripts that handles the database transaction(s). If you have a more detailed decription, I might be able to point you to something more specific.
I strongly suggest adding web service layer between your application and database, using i.e. JSON or XML. Exposing DB directly ma be security risk and is rarely the way to go.
I want to write an app which can be installed on iphone or Android and communicate the website with Joomla installed on it. I understand that Joomla is a CMS to handle front end and database.
My question is, for the iphone app to communicate the website database, do I have to write plugins for Joomla, or do I have to create a seperate engine which communicated database directly?
Thanks.
You can use Joomla API or you can implement whatever you want with PHP code that you'll build yourself, which is actually creating your own "API". for example, you can write a php that will be hosted on the same server as Joomla which will call the DB and list the names and emails of all the users (from jos_users) - this is pretty easy to implement on the server's side, and you can implement a call to this PHP on the client side (phone) which will send a request and parse the response and display it.
MySQL
Server: db4free.net via TCP/IP
Server version: 5.5.12-log
Protocol version: 10
User: alan89#88.198.43.24
MySQL charset: UTF-8 Unicode (utf8)
Web server
Apache/2.2.14 (Ubuntu)
MySQL client version: 5.1.41
PHP extension: mysqli Documentation
This is my online database and the name is imammuda. In the database there is a table named "Testing".
Now, I have 2 applications which are admin and user. Admin needs to login into the database server then update data, while user just retrieves data or tables from the server.
I was stuck here at how to code the bridge between Android and server.
Well, if you need to communicate directly with the database you can use the MySQL JDBC drivers: there are many many many security problems with embedding direct database access into your app, but that WOULD work (longer dialog at Is it sensible to connect a desktop client directly to MySQL?). You would need to pass the username/password into the app and then you can just use regular JDBC code to talk to the database.
Alternatively you will want to implement some form of HTTP web service to mediate access, perform the necessary data verification and do access control. That is honestly a longer discussion than can be performed in a single answer. As a number of other potential answers describe you will need to look at using HTTP client. Also, you will need to implement a web service in a convenient language: you can see a detailed discussion about writing a database access web service at Writing data into a database using a fully REST web service.
EDIT: interesting option might be http://htsql.org/