Client creates and sends a file to the Server, Server updates the file and sends it back to the Client , using Java Socket Programming
Open two terminals side by side, one inside the Client folder containing the client.java file and the other terminal inside the Server folder containing the server.java file.
javac server.java
java server
javac client.java
java client
- Server has started and is waiting for the client to connect.
- Client Connects to the server.
- Server is waiting for the client to send a CSV file
- Client creates a CSV file named data.csv by entering the headers and the data
- Client reads the data.csv and stores the data into a byte array[].
- Client sends the byte array to the server and waits for the server’s response.
- Server receives the byte array containing the data , sent by the client.
- Server creates its own copy of data.csv and writes the data from the byte array to the data.csv.
- Server reads its copy of data.csv line by line and writes each line into a new CSV file named temp.csv , after updating the salary.
- Now the server has its own copy of data.csv and the updated salary file named temp.csv
- Server deletes its copy of data.csv and renames the “temp.csv” to “data.csv”.
- Server sends the updated copy of “data.csv” back to client.
- Client receives the updated data in the form of a byte array.
- Client creates a CSV file named updatedData.csv and writes the data from the received byte array into the updatedData.csv.
- Now the client has the “data.csv” and the “updatedData.csv”.
- Client deletes the old “data.csv” and renames the “updatedData.csv” to “data.csv”.
- Now client has the file “data.csv” which contains the data of employees with salaries increased by 10%.
