readme: expanded a bit

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[package]
name = "bunbun-worker"
version = "0.1.0"
description = "An rpc and non-rpc rabbitmq worker for Mediarose"
description = "An rpc/non-rpc rabbitmq worker library"
edition = "2021"
license = "AGPL-3.0"
authors = ["4o1x5 <4o1x5@4o1x5.dev>"]
repository = "https://git.4o1x5.dev/4o1x5/bunbun-worker"
[dependencies]

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@ -1,30 +1,50 @@
<center> <h1> BunBun-Worker </h1> </center>
A multithreaded _panic-safe_ job runner built on the AMQP. Bunbun-worker features RPC and nonRPC calls, and can handle multiple types of messages at a time.
`bunbun-worker` is a panic-safe multithreaded job-runner server/client library for rust. It supports [RPC](https://wikipedia.org/wiki/Remote_procedure_call) and regular (non-rpc) calls. As of right now only [rabbitmq](https://www.rabbitmq.com/) is supported but [gRPC](https://grpc.io/) will be added too.
> ❗ Disclaimer
> This crate is still under development, meaning api's may change on every commit...
# Introduction
`bunbun-worker` was made to provide a way for microservices written in rust to communicate to each other by dispatching jobs that may return data and those who don't.
### Rpc
Remote procedure call, as it's name says is a message that can be sent to a remote microservice to be processed and the result to be returned. In `bunbun-worker` it's implemented by the following example:
```mermaid
sequenceDiagram
ServiceA->>+ServiceB: Hey, could you do this job for me?
Note right of ServiceB: ServiceB does the job
ServiceB->>+ServiceA: Sure, here is the data result
```
1. ServiceA creates a callback queue that the response shall be sent to.
2. ServiceA sends a json job message to an **already declared** queue on a rabbitmq server.
3. ServiceB is listening on that queue for messages and spawns a new thread for each received.
4. Once ServiceB has finished the work, using the received messages header it responds to the callback queue with the correlation-id.
### Non-rpc
In `bunbun-worker` regular jobs are called _non-rpc_ jobs, indicating that the response is not awaited.
## Installation
Since this package is not published to crates.io you will need to add it manually to `Cargo.toml`
Get directly from crates.io
```toml
[dependencies]
bunbun-worker = { git = "https://git.4o1x5.dev/4o1x5/bunbun-worker", version = "0.12" }
bunbun-worker = { version = "0.1.0" }
```
or
or get it directly from source
```toml
[dependencies]
bunbun-worker = { git = "https://git.4o1x5.dev/4o1x5/bunbun-worker", branch = "main" }
```
## Motivation
I have a project called _Mediarose_ in development and I needed a way to have efficient and simple communication between services to kill of circular dependencies.
## Usage
Here is a basic implementation of an RPC job in bunbun-worker
@ -64,7 +84,7 @@ impl RPCServerTask for EmailJob {
type State = State;
fn run(
self,
state: Arc<Mutex<Self::State>>,
state: Self::State,
) -> futures::prelude::future::BoxFuture<'static, Result<Self::Result, Self::ErroredResult>>
{
Box::pin(async move {
@ -87,9 +107,9 @@ async fn main(){
.add_rpc_consumer::<EmailJob>(
"email-emailjob-v1.0.0", // queue name
"emailjob", // consumer tag
Arc::new(Mutex::new(State {
State {
something: "test".into(), // putting our state into a Arc<Mutex<S>> for thread safety
})),
},
)
.await;
tracing::debug!("Starting listener");
@ -142,13 +162,24 @@ async fn main(){
}
```
# Limitations
1. Currently some `unwrap()`'s are called inside the code and may results in panics (not in the job-runner).
2. No TLS support
3. No settings, and very limited API
4. The rabbitmq RPC logic is very basic with no message-versioning (aside using different queue names (see [usage](#usage)) )
# Bugs department
Since the code is hosted on a private git instance (as of right now) any bugs shall be discussed in [4o1x5's project room](https://matrix.to/#/#projects:4o1x5.dev).
## License
Licensed under [GNU AFFERO GENERAL PUBLIC LICENSE](https://www.gnu.org/licenses/agpl-3.0.en.html)
### Contribution
Currently this library does not accept any contributors, as it's hosted on a private registry and git server.
Currently this library does not accept any contributors, as it's hosted on a private git server.
# Credits

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@ -184,7 +184,6 @@ impl BunBunWorker {
match outcome {
Err(error) => {
tracing::error!("Failed to start thread for worker {}", error);
// TODO return erro
let headers = create_header(ResultHeader::Panic);
let _ = delivery.ack(BasicAckOptions::default()).await; // acking the delivery
respond_to_rpc_queue(