add doc-string on library level

src/lib.rs

@@ -1,3 +1,47 @@
+//! # CAPP - "Comprehensive Asynchronous Parallel Processing" or just "Crawler APP"
+//!
+//! `capp` is a Rust library designed to provide powerful and flexible tools for building efficient web crawlers and other asynchronous, parallel processing applications. It offers a robust framework for managing concurrent tasks, handling network requests, and processing large amounts of data in a scalable manner.
+//!
+//! ## Features
+//!
+//! - **Asynchronous Task Management**: Utilize tokio-based asynchronous processing for efficient, non-blocking execution of tasks.
+//! - **Flexible Task Queue**: Implement various backend storage options for task queues, including in-memory and Redis-based solutions.
+//! - **Round-Robin Task Distribution**: Ensure fair distribution of tasks across different domains or categories.
+//! - **Configurable Workers**: Set up and manage multiple worker instances to process tasks concurrently.
+//! - **Error Handling and Retry Mechanisms**: Robust error handling with configurable retry policies for failed tasks.
+//! - **Dead Letter Queue (DLQ)**: Automatically move problematic tasks to a separate queue for later analysis or reprocessing.
+//! - **Health Checks**: Built-in health check functionality to ensure the stability of your crawling or processing system.
+//! - **Extensible Architecture**: Easily extend the library with custom task types, processing logic, and storage backends.
+//!
+//! ## Use Cases
+//!
+//! While `capp` is primarily designed for building web crawlers, its architecture makes it suitable for a variety of parallel processing tasks, including:
+//!
+//! - Web scraping and data extraction
+//! - Distributed task processing
+//! - Batch job management
+//! - Asynchronous API clients
+//! - Large-scale data processing pipelines
+//!
+//! ## Getting Started
+//!
+//! To use `capp` in your project, add it to your `Cargo.toml`:
+//!
+//! ```toml
+//! [dependencies]
+//! capp = "0.4.1"
+//! ```
+//!
+//! Check examples!
+//!
+//! ## Modules
+//!
+//! - `config`: Configuration management for your application.
+//! - `healthcheck`: Functions for performing health checks on your system.
+//! - `http`: Utilities for making HTTP requests and handling responses.
+//! - `manager`: Task and worker management structures.
+//! - `queue`: Task queue implementations and traits.
+//! - `task`: Definitions and utilities for working with tasks.
 pub mod config;
 #[cfg(feature = "healthcheck")]
 pub mod healthcheck;