cerk_loader_file

This is a package for CERK. CERK is an open source CloudEvents Router written in Rust with a MicroKernel architecture.

Introduction

CERK lets you route your CloudEvents between different different ports. Ports are transport layer bindings over which CloudEvents can be exchanged. It is built with modularity and portability in mind.

Components

CERK comes with a couple of prefabricated components, but implementing custom components is easy.

A good overview is provided on GitHub.

This Component: File Base Loader

The cerk_loader_file link the different modules together and pass it to the bootstrap function.

It uses a ComponentStartLinks file with all links to the start functions and a configuration file. The configuration file could be passed by the env variable $INIT_PATH or just use the path ./init.json.

Example Config

{
  "scheduler": "SCHEDULER",
  "router": "ROUTER",
  "config_loader": "CONFIG_LOADER",
  "ports": {
    "myport": "PORT"
  }
}

Example ComponentStartLinks

#[macro_use]
extern crate cerk_loader_file;
use cerk_loader_file::{start, ComponentStartLinks};

use cerk::runtime::{InternalServerId, InternalServerFn, InternalServerFnRefStatic, ScheduleFn, ScheduleFnRefStatic};
use cerk::runtime::channel::{BoxedReceiver, BoxedSender};
use cerk::kernel::{StartOptions, KernelFn};

fn dummy_scheduler(_: StartOptions, _: KernelFn) {}

fn dummy_router(_: InternalServerId, _: BoxedReceiver, _: BoxedSender) {}

fn dummy_config_loader(_: InternalServerId, _: BoxedReceiver, _: BoxedSender) {}

fn dummy_port(_: InternalServerId, _: BoxedReceiver, _: BoxedSender) {}

fn dummy_port_other(_: InternalServerId, _: BoxedReceiver, _: BoxedSender) {}

const SCHEDULER: ScheduleFnRefStatic = &(dummy_scheduler as ScheduleFn);
const ROUTER: InternalServerFnRefStatic = &(dummy_router as InternalServerFn);
const CONFIG_LOADER: InternalServerFnRefStatic = &(dummy_config_loader as InternalServerFn);
const PORT: InternalServerFnRefStatic = &(dummy_port as InternalServerFn);

fn main() {
    let link = ComponentStartLinks {
            schedulers: fn_to_links![SCHEDULER],
            routers: fn_to_links![ROUTER],
            config_loaders: fn_to_links![CONFIG_LOADER],
            ports: fn_to_links![PORT],
        };

    start(link);
}

Examples

• AMQP to Printer

Update Readme

The original readme text is a Rust doc comment in the lib.rs file

1. cargo install cargo-readme
2. cargo readme > README.md

License

Apache-2.0