Project 2: Multithreaded Database Server

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## Overview

This project implements a multi-threaded database server that supports basic operations such as `write`, `read`, and `delete` on key-value pairs. The server is designed to handle concurrent client requests using worker threads and a work queue. The project also includes a test suite to validate the functionality of the server.

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## Added Files and Descriptions

### Source Code

1. dbserver.c

- Entry point for the database server.

- Initializes the database, creates the work queue, starts the listener thread, and spawns worker threads.

- Calls console handler function on the main thread for 'stats' and 'quit' commands and graceful shutdown.

2. dbservices.c

- Implements the listener thread, worker thread logic, and request handling.

- Created additional helper functions for distributing workers, updating statistics, and cleanup of database files.

- Manages the work queue and updates server statistics.

- Provides functions for handling client requests (`write`, `read`, `delete`) and responding to them.

3. dboperations.c

- Implements the core database operations (`db_write`, `db_read`, `db_delete`).

- Manages synchronization and file-based storage for key-value pairs.

- Uses mutexes and condition variables to ensure thread safety.

4. queue.c

- Implements a queue for managing client requests.

- Provides functions to enqueue, dequeue, and check the size of the queue.

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### Header Files

1. dbservices.h

- Declares functions and global variables used in `dbservices.c`.

- Defines constants such as `DEFAULT_PORT` and `MAX_WORKERS`.

2. dboperations.h

- Declares the database operations and defines the structure of database entries.

- Includes constants for key-value size limits and database states.

3. queue.h

- Declares the queue structure and its associated functions.

- Used for managing the work queue in the server.

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### Build and Test

1. Makefile

- Automates the build process for the project.

- Compiles the source files and links them with required libraries (`pthread` and `zlib`).

- Provides a `clean` target to remove compiled files.

2. testing.sh

- A shell script to automate testing of the database server.

- Builds the project, starts the server in a detached `tmux` session, and runs a series of tests.

- Includes tests for basic operations, edge cases, and concurrency.

- Run this test by just running the command 'sh testing.sh' in your terminal.

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