json-job-dispatch 2.0.1

Dispatch jobs described by JSON files and sort them according to their status.
Documentation 
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use std::error::Error;

use crates::serde_json::Value;

use director::Director;
use handler::{Handler, HandlerResult};

/// A watchdog for the director.
///
/// This handles `watchdog:restart` and `watchdog:exit` job kinds to make restarting and exiting
/// the director easier.
#[derive(Debug, Clone, Copy, Default)]
pub struct DirectorWatchdog;

impl Handler for DirectorWatchdog {
    fn add_to_director<'a>(&'a self, director: &mut Director<'a>) -> Result<(), Box<dyn Error + Send + Sync>> {
        director.add_handler("watchdog:restart", self)?;
        director.add_handler("watchdog:exit", self)?;

        Ok(())
    }

    fn handle(&self, kind: &str, _: &Value) -> Result<HandlerResult, Box<dyn Error + Send + Sync>> {
        Ok(match kind {
            "watchdog:restart" => HandlerResult::Restart,
            "watchdog:exit" => HandlerResult::Done,
            _ => HandlerResult::Reject(format!("watchdog received an unhandled {} job", kind)),
        })
    }
}