Added SQL code along with connection utility

[alanpjohn]

With reference to #22

Queries added

Authors: @Rashmikareddya @sushmadammalapati

• SQL queries for table creation added
• SQL trigger for amenities update
• SQL trigger for feedback update

SQLCredentialsUtil

Author : @TheForeverLost

com.hsbc.meets.util.SQLCredentialsUtil

This class reads MySQL database credentials stored at src/main/webapp/WEB_INF/connection.prop. I have added to gitignore the connection.prop file so that no one pushes it because it has credentials so security issues annd it may not be the same for all of us as we are all going to be using local database.

So you'll all have to create connnection.prop files in the location specified and use this class to retrieve the properties. Till you merge with this branch, you can use store the properties in the code itself

Below is a sample connection.prop file

dname=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/database 
username=username
password=password

Also created is a InvalidPropFileException which is thrown whenever the properties could not be read properly

[rishikeshshede]

looks good to me

[ShubhraBhuniaGhosh]

explain what is this later

[pavleen14]

seems fine to me, we can move ahead with this.

[alanpjohn]

explain what is this later

@ShubhraBhuniaGhosh

Currently you have put your database credentials in the code

That is not appropriate in an application. So instead, you will put these credentials in a file called connection.prop stored at src/main/webapp/WEB_INF/connection.prop in the project folder.

and then use the com.hsbc.meets.util.SQLConnectionCredentials.readCredentials() (static method) to get a com.hsbc.meets.util.SQLConnectionCredentials object which store your credentials in your constructor and use this to create your connection.

something on these lines

import com.hsbc.meets.util.SQLConnectionCredentials;

public class SomeDaoImpl{
    
    public SomeDaoImpl(){
		try{
        SQLConnectionCredentials creds = SQLConnectionCredentials.readCredentials();
            String driverName = creds.getDriverName();
            String username = creds.getUsername();
            String password = creds.getPassword();
            String url = creds.getUrl();
        }catch(InvalidPropFileException e){
            /*
            Your error handling
            */
        }
        /*
        Add your connection estabilishment code here
        /*
    }
}

[ShubhraBhuniaGhosh]

explain what is this later

@ShubhraBhuniaGhosh

Currently you have put your database credentials in the code

That is not appropriate in an application. So instead, you will put these credentials in a file called connection.prop stored at src/main/webapp/WEB_INF/connection.prop in the project folder.

and then use the com.hsbc.meets.util.SQLConnectionCredentials.readCredentials() (static method) to get a com.hsbc.meets.util.SQLConnectionCredentials object which store your credentials in your constructor and use this to create your connection.

something on these lines

import com.hsbc.meets.util.SQLConnectionCredentials;

public class SomeDaoImpl{
    
    public SomeDaoImpl(){
		try{
        SQLConnectionCredentials creds = SQLConnectionCredentials.readCredentials();
            String driverName = creds.getDriverName();
            String username = creds.getUsername();
            String password = creds.getPassword();
            String url = creds.getUrl();
        }catch(InvalidPropFileException e){
            /*
            Your error handling
            */
        }
        /*
        Add your connection estabilishment code here
        /*
    }
}

got it thank u

[alanpjohn]

We should name our database something more appropriate to the project