inMemory-DB

Contributors

Description

This is a simple in memory database that supports the following commands:

• set <key> <value> – Set the variable name to the value value. Neither variable names nor values will contain spaces.
• get <key< – Print out the value of the variable name.
• del <key> – Unset the variable name, making it just like that variable was never set.
• aset <list_name> <value> <key> – Add the element value to the sorted set called list_name. If list_name does not exist, create it. Elements in a list are ordered.
• aget <list_name> <key> – Print out the value of the element at index key in sorted set list_name.
• adel <list_name> <key> – Unset the element at index key in sorted set list_name, making it just like that element was never set.
• adel <list_name> – Unset the entire sorted set list_name, making it just like that sorted set was never set.
• expire <key> <time_in_seconds> – Set a timeout on variable name, such that it will expire and be deleted in time_in_seconds seconds.
• ttl <key> – Print out the remaining time to live (in seconds) of the variable name.

Installation

git clone https://github.com/ZeyadAttia5/inMemory-DB.git
cd inMemory-DB

Usage

To run the server:

gcc server.cpp -o server -pthread
./server

To run the client:

gcc client.cpp -o client -pthread
./client <command>

Example 1

./client set name zeyad -> sets the variable name to the value zeyad
./client get name -> prints out the value of the variable name which is "zeyad"
./client del name -> unsets the variable name
./client get name -> prints out NULL since the variable name is not set

Example 2

./client aset list 1 zeyad -> creates a sorted set called list and adds the value 1 and the key zeyad to it
./client aset list 2 amr -> adds the value 2 and the key amr to the sorted set list

Example 3

./client set name zeyad -> sets the variable name to the value zeyad
./client expire name 10 -> sets a timeout on variable name, such that it will expire and be deleted in 10 seconds
./client ttl name -> prints out the remaining time to live (in seconds) of the variable name