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asonix 2019-05-23 22:25:00 -05:00
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12
Cargo.toml
View file

@ -13,25 +13,15 @@ edition = "2018"
members = [
"jobs-actix",
"jobs-core",
"jobs-server",
"examples/server-jobs-example",
]
[features]
default = ["background-jobs-server", "background-jobs-server/tokio-zmq"]
no_unix = ["background-jobs-server", "background-jobs-server/futures-zmq"]
actix = ["background-jobs-actix"]
default = ["background-jobs-actix"]
[dependencies.background-jobs-core]
version = "0.4"
path = "jobs-core"
[dependencies.background-jobs-server]
version = "0.4"
path = "jobs-server"
default-features = false
optional = true
[dependencies.background-jobs-actix]
version = "0.5"
path = "jobs-actix"

1
examples/server-jobs-example/.env
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@ -1 +0,0 @@
RUST_LOG=info

1
examples/server-jobs-example/.gitignore vendored
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@ -1 +0,0 @@
example-db

19
examples/server-jobs-example/Cargo.toml
View file

@ -1,19 +0,0 @@
[package]
name = "server-jobs-example"
version = "0.1.0"
authors = ["asonix <asonix@asonix.dog>"]
edition = "2018"
[dependencies]
dotenv = "0.13"
env_logger = "0.5"
failure = "0.1"
futures = "0.1"
log = "0.4"
serde = "1.0"
serde_derive = "1.0"
tokio = "0.1"
[dependencies.background-jobs]
version = "0.5"
path = "../.."

37
examples/server-jobs-example/src/bin/server.rs
View file

@ -1,37 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use background_jobs::ServerConfig;
use failure::Error;
use server_jobs_example::queue_set;
fn main() -> Result<(), Error> {
dotenv::dotenv().ok();
env_logger::init();
tokio::run(ServerConfig::init(
1,
"127.0.0.1",
5555,
queue_set(),
"example-db",
));
Ok(())
}

43
examples/server-jobs-example/src/bin/spawner.rs
View file

@ -1,43 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use background_jobs::SpawnerConfig;
use futures::{future::lazy, Future};
use server_jobs_example::{MyJob, MyProcessor};
fn main() {
dotenv::dotenv().ok();
env_logger::init();
let (_, _, jobs) = (1..50).fold((0, 1, Vec::new()), |(x, y, mut acc), _| {
acc.push(MyJob::new(x, y));
(y, x + y, acc)
});
let spawner = SpawnerConfig::new("localhost", 5555);
tokio::run(lazy(move || {
for job in jobs {
tokio::spawn(spawner.queue::<MyProcessor, _>(job).map_err(|_| ()));
}
Ok(())
}));
}

41
examples/server-jobs-example/src/bin/sync_spawner.rs
View file

@ -1,41 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use background_jobs::SpawnerConfig;
use failure::Error;
use server_jobs_example::{MyJob, MyProcessor};
fn main() -> Result<(), Error> {
dotenv::dotenv().ok();
env_logger::init();
let (_, _, jobs) = (1..50).fold((0, 1, Vec::new()), |(x, y, mut acc), _| {
acc.push(MyJob::new(x, y));
(y, x + y, acc)
});
let spawner = SpawnerConfig::new("localhost", 5555);
for job in jobs {
spawner.queue_sync::<MyProcessor, _>(job)?;
}
Ok(())
}

35
examples/server-jobs-example/src/bin/worker.rs
View file

@ -1,35 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use background_jobs::WorkerConfig;
use failure::Error;
use server_jobs_example::{queue_map, MyProcessor};
fn main() -> Result<(), Error> {
dotenv::dotenv().ok();
env_logger::init();
let mut worker = WorkerConfig::new((), "localhost".to_owned(), 5555, queue_map());
worker.register_processor(MyProcessor);
tokio::run(worker.run());
Ok(())
}

77
examples/server-jobs-example/src/lib.rs
View file

@ -1,77 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
#[macro_use]
extern crate log;
#[macro_use]
extern crate serde_derive;
use std::collections::{BTreeMap, BTreeSet};
use background_jobs::{Backoff, Job, MaxRetries, Processor};
use failure::Error;
use futures::{future::IntoFuture, Future};
const DEFAULT_QUEUE: &'static str = "default";
pub fn queue_map() -> BTreeMap<String, usize> {
let mut map = BTreeMap::new();
map.insert(DEFAULT_QUEUE.to_owned(), 18);
map
}
pub fn queue_set() -> BTreeSet<String> {
queue_map().keys().cloned().collect()
}
#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct MyJob {
some_usize: usize,
other_usize: usize,
}
impl MyJob {
pub fn new(some_usize: usize, other_usize: usize) -> Self {
MyJob {
some_usize,
other_usize,
}
}
}
impl Job for MyJob {
fn run(self, _: ()) -> Box<dyn Future<Item = (), Error = Error> + Send> {
info!("args: {:?}", self);
Box::new(Ok(()).into_future())
}
}
#[derive(Clone, Debug)]
pub struct MyProcessor;
impl Processor for MyProcessor {
type Job = MyJob;
const NAME: &'static str = "MyProcessor";
const QUEUE: &'static str = DEFAULT_QUEUE;
const MAX_RETRIES: MaxRetries = MaxRetries::Count(1);
const BACKOFF_STRATEGY: Backoff = Backoff::Exponential(2);
}

12
jobs-actix/src/lib.rs
View file

@ -28,7 +28,7 @@ impl ServerConfig {
pub fn start<S>(self) -> QueueHandle<S>
where
S: Clone + Send + Sync + 'static,
S: Clone + Send + 'static,
{
let ServerConfig { server_id, db_path } = self;
@ -44,7 +44,7 @@ impl ServerConfig {
pub struct WorkerConfig<S>
where
S: Clone + Send + Sync + 'static,
S: Clone + Send + 'static,
{
processors: ProcessorMap<S>,
queues: BTreeMap<String, usize>,
@ -52,7 +52,7 @@ where
impl<S> WorkerConfig<S>
where
S: Clone + Send + Sync + 'static,
S: Clone + Send + 'static,
{
pub fn new(state: S) -> Self {
WorkerConfig {
@ -63,7 +63,7 @@ where
pub fn register<P>(&mut self, processor: P)
where
P: Processor<S> + Send + Sync + 'static,
P: Processor<S> + Send + 'static,
{
self.queues.insert(P::QUEUE.to_owned(), 4);
self.processors.register_processor(processor);
@ -95,14 +95,14 @@ where
#[derive(Clone)]
pub struct QueueHandle<S>
where
S: Clone + Send + Sync + 'static,
S: Clone + Send + 'static,
{
inner: Addr<Server<LocalWorker<S>>>,
}
impl<S> QueueHandle<S>
where
S: Clone + Send + Sync + 'static,
S: Clone + Send + 'static,
{
pub fn queue<P>(&self, job: P::Job) -> Result<(), Error>
where

8
jobs-actix/src/worker.rs
View file

@ -25,7 +25,7 @@ impl Message for ProcessJob {
pub struct LocalWorker<State>
where
State: Clone + Send + Sync + 'static,
State: Clone + Send + 'static,
{
id: usize,
queue: String,
@ -35,7 +35,7 @@ where
impl<State> LocalWorker<State>
where
State: Clone + Send + Sync + 'static,
State: Clone + Send + 'static,
{
pub fn new(
id: usize,
@ -54,7 +54,7 @@ where
impl<State> Actor for LocalWorker<State>
where
State: Clone + Send + Sync + 'static,
State: Clone + Send + 'static,
{
type Context = Context<Self>;
@ -66,7 +66,7 @@ where
impl<State> Handler<ProcessJob> for LocalWorker<State>
where
State: Clone + Send + Sync + 'static,
State: Clone + Send + 'static,
{
type Result = ();

2
jobs-core/src/job.rs
View file

@ -26,7 +26,7 @@ use crate::{Backoff, MaxRetries};
/// The Job trait defines parameters pertaining to an instance of background job
pub trait Job<S = ()>: Serialize + DeserializeOwned
where
S: Clone + Send + Sync + 'static,
S: Clone + Send + 'static,
{
/// Users of this library must define what it means to run a job.
///

2
jobs-core/src/processor.rs
View file

@ -83,7 +83,7 @@ use crate::{Backoff, Job, JobError, MaxRetries, NewJobInfo};
/// ```
pub trait Processor<S = ()>: Clone
where
S: Clone + Send + Sync + 'static,
S: Clone + Send + 'static,
{
type Job: Job<S> + 'static;

6
jobs-core/src/processor_map.rs
View file

@ -33,7 +33,7 @@ use crate::{JobError, JobInfo, Processor};
/// [`ProcessorMap`](https://docs.rs/background-jobs-core/0.4.0/background_jobs_core/struct.ProcessorMap.html)
/// struct stores these `ProcessFn` types that don't expose differences in Job types.
pub type ProcessFn =
Box<dyn Fn(Value) -> Box<dyn Future<Item = (), Error = JobError> + Send> + Send + Sync>;
Box<dyn Fn(Value) -> Box<dyn Future<Item = (), Error = JobError> + Send> + Send>;
/// A type for storing the relationships between processor names and the processor itself
///
@ -50,7 +50,7 @@ where
impl<S> ProcessorMap<S>
where
S: Clone + Send + Sync + 'static,
S: Clone + Send + 'static,
{
/// Intialize a `ProcessorMap`
///
@ -72,7 +72,7 @@ where
/// make sure to register all your processors up-front.
pub fn register_processor<P>(&mut self, processor: P)
where
P: Processor<S> + Send + Sync + 'static,
P: Processor<S> + Send + 'static,
{
let state = self.state.clone();

35
jobs-server/Cargo.toml
View file

@ -1,35 +0,0 @@
[package]
name = "background-jobs-server"
description = "Jobs processor server based on ZeroMQ"
version = "0.4.0"
license = "GPL-3.0"
authors = ["asonix <asonix@asonix.dog>"]
repository = "https://git.asonix.dog/asonix/background-jobs"
keywords = ["jobs", "processor"]
edition = "2018"
[dependencies]
failure = "0.1"
futures = "0.1"
log = "0.4"
serde = "1.0"
serde_json = "1.0"
serde_derive = "1.0"
tokio = "0.1"
tokio-threadpool = "0.1"
zmq = "0.8"
[features]
default = ["tokio-zmq"]
[dependencies.background-jobs-core]
version = "0.4"
path = "../jobs-core"
[dependencies.tokio-zmq]
version = "0.8"
optional = true
[dependencies.futures-zmq]
version = "0.3"
optional = true

674
jobs-server/LICENSE
View file

@ -1,674 +0,0 @@
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
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have the freedom to distribute copies of free software (and charge for
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To protect your rights, we need to prevent others from denying you
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For example, if you distribute copies of such a program, whether
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For the developers' and authors' protection, the GPL clearly explains
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161
jobs-server/src/lib.rs
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@ -1,161 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::marker::PhantomData;
use background_jobs_core::{Backoff, Job, MaxRetries};
use failure::Error;
use futures::{future::poll_fn, Future};
use serde::{de::DeserializeOwned, ser::Serialize};
use serde_derive::{Deserialize, Serialize};
use tokio_threadpool::blocking;
mod server;
mod spawner;
mod worker;
pub use crate::{server::ServerConfig, spawner::SpawnerConfig, worker::WorkerConfig};
fn coerce<T, F>(res: Result<Result<T, Error>, F>) -> Result<T, Error>
where
F: Into<Error>,
{
match res {
Ok(res) => res,
Err(e) => Err(e.into()),
}
}
/// The SyncJob trait defines parameters pertaining to a synchronous instance of background job
///
/// This trait should be implemented sparingly, but is provided so that synchronous tasks may be
/// executed. If you have the ability to implement the
/// [`Job`](https://docs.rs/background-jobs/0.4.0/background_jobs/trait.Job.html) trait directly,
/// you should.
///
/// ### Example
///
/// ```rust
/// use background_jobs_server::SyncJob;
/// use failure::Error;
/// use log::info;
/// use serde_derive::{Deserialize, Serialize};
///
/// #[derive(Clone, Deserialize, Serialize)]
/// struct MyJob {
/// count: i32,
/// }
///
/// impl SyncJob for MyJob {
/// fn run(self, _state: ()) -> Result<(), Error> {
/// info!("Processing {}", self.count);
///
/// // Perform some synchronous operation, like a DB action with r2d2 and diesel
///
/// Ok(())
/// }
/// }
///
/// fn main() {
/// let sync_job = MyJob { count: 0 };
/// let job = sync_job.to_job();
/// }
/// ```
pub trait SyncJob<S = ()>: Clone {
/// Users of this library must define what it means to run a job.
///
/// This should contain all the logic needed to complete a job. If that means queuing more
/// jobs, sending an email, shelling out (don't shell out), or doing otherwise lengthy
/// processes, that logic should all be called from inside this method.
///
/// The state passed into this job is initialized at the start of the application. The state
/// argument could be useful for containing a hook into something like r2d2, or the address of
/// an actor in an actix-based system.
fn run(self, state: S) -> Result<(), Error>;
/// If this job should not use the default queue for its processor, this can be overridden in
/// user-code.
///
/// Jobs will only be processed by processors that are registered, and if a queue is supplied
/// here that is not associated with a valid processor for this job, it will never be
/// processed.
fn queue(&self) -> Option<&str> {
None
}
/// If this job should not use the default maximum retry count for its processor, this can be
/// overridden in user-code.
fn max_retries(&self) -> Option<MaxRetries> {
None
}
/// If this job should not use the default backoff strategy for its processor, this can be
/// overridden in user-code.
fn backoff_strategy(&self) -> Option<Backoff> {
None
}
/// Wrap this type in a SyncJobWrapper so it implements Job
fn to_job(self) -> SyncJobWrapper<Self, S> {
SyncJobWrapper {
inner: self,
phantom: PhantomData,
}
}
}
/// A wrapper around synchronous jobs
#[derive(Clone, Deserialize, Serialize)]
pub struct SyncJobWrapper<J, S = ()>
where
J: SyncJob<S>,
{
inner: J,
phantom: PhantomData<S>,
}
impl<J, S> Job<S> for SyncJobWrapper<J, S>
where
J: SyncJob<S> + Serialize + DeserializeOwned + Send + 'static,
S: Clone + Send + Sync + 'static,
{
fn queue(&self) -> Option<&str> {
self.inner.queue()
}
fn max_retries(&self) -> Option<MaxRetries> {
self.inner.max_retries()
}
fn backoff_strategy(&self) -> Option<Backoff> {
self.inner.backoff_strategy()
}
fn run(self, state: S) -> Box<dyn Future<Item = (), Error = Error> + Send> {
let fut = poll_fn(move || {
let job = self.inner.clone();
let state = state.clone();
blocking(move || job.run(state.clone()))
})
.then(coerce);
Box::new(fut)
}
}

209
jobs-server/src/server/mod.rs
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@ -1,209 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::{
collections::BTreeSet,
path::{Path, PathBuf},
sync::Arc,
};
use background_jobs_core::Storage;
use failure::{Error, Fail};
use futures::{future::poll_fn, Future};
use log::{error, info};
use tokio_threadpool::blocking;
use zmq::Context;
use crate::coerce;
mod portmap;
mod pull;
mod push;
mod stalled;
use self::{portmap::PortMapConfig, pull::PullConfig, push::PushConfig, stalled::StalledConfig};
#[derive(Clone)]
pub(crate) struct Config {
server_id: usize,
ip: String,
base_port: usize,
queues: BTreeSet<String>,
db_path: PathBuf,
context: Arc<Context>,
}
impl Config {
fn create_server(&self) -> Box<dyn Future<Item = (), Error = ()> + Send> {
let db_path = self.db_path.clone();
let base_port = self.base_port;
let queues = self.queues.clone();
let server_id = self.server_id;
let config = Arc::new(self.clone());
let fut = poll_fn(move || {
let db_path = db_path.clone();
let base_port = base_port;
let queues = queues.clone();
blocking(move || {
let storage = Arc::new(Storage::init(db_path)?);
storage.requeue_staged_jobs(server_id)?;
storage.check_stalled_jobs(server_id)?;
let port_map = storage.get_port_mapping(base_port, queues, server_id)?;
Ok((storage, port_map))
})
})
.from_err::<Error>()
.then(coerce)
.and_then(move |(storage, port_map)| {
for queue in config.queues.iter() {
let port = port_map.get(queue).ok_or(MissingQueue(queue.to_owned()))?;
let address = format!("tcp://{}:{}", config.ip, port);
info!("Creating queue {} on address {}", queue, address);
tokio::spawn(PushConfig::init(
server_id,
address,
queue.to_owned(),
storage.clone(),
config.clone(),
));
}
StalledConfig::init(server_id, storage.clone());
let portmap_address = format!("tcp://{}:{}", config.ip, config.base_port + 1);
info!("Creating portmap on address {}", portmap_address);
tokio::spawn(PortMapConfig::init(
portmap_address,
port_map,
config.clone(),
));
let pull_address = format!("tcp://{}:{}", config.ip, config.base_port);
info!("Creating puller on address {}", pull_address);
tokio::spawn(PullConfig::init(server_id, pull_address, storage, config));
Ok(())
})
.map_err(|e| error!("Error starting server, {}", e));
Box::new(fut)
}
}
#[derive(Clone, Debug, Fail)]
#[fail(display = "Queue is missing from map, {}", _0)]
struct MissingQueue(String);
/// The entry point for creating a background-jobs server
///
/// `ServerConfig` is used to spin up the infrastructure to manage queueing and storing jobs, but
/// it does not provide functionality to execute jobs. For that, you must create a
/// [`Worker`](https://docs.rs/background-jobs-server/0.4.0/background_jobs_server/struct.WorkerConfig.html)
/// that will connect to the running server.
///
/// This type doesn't have any associated data, but is used as a proxy for starting the
/// background-jobs runtime.
///
/// ```rust
/// use std::collections::BTreeSet;
/// use background_jobs_server::ServerConfig;
/// use failure::Error;
///
/// fn main() -> Result<(), Error> {
/// let mut queue_set = BTreeSet::new();
/// queue_set.insert("default".to_owned());
///
/// let start_server = ServerConfig::init(
/// 1,
/// "127.0.0.1",
/// 5555,
/// queue_set,
/// "example-db",
/// );
///
/// # let _ = start_server;
/// // Comment out the start so we don't run the full server in doctests
/// // tokio::run(start_server)
///
/// Ok(())
/// }
/// ```
pub struct ServerConfig;
impl ServerConfig {
/// Create a new background-jobs Server that binds to the provided `ip` with ports starting at
/// `base_port`.
///
/// The smallest background-jobs server will bind to 3 ports. Each port serves a different
/// purpose:
/// - `base_port` is the port that jobs are sent to the server on
/// - `base_port` + 1 is the port that the server uses to advertise which queues are available
/// - `base_port` + n is bound for an individual queue of jobs that the server pushes to
/// workers.
///
/// This method returns a future that, when run, spawns all of the server's required futures
/// onto tokio. Therefore, this can only be used from tokio.
pub fn init<P: AsRef<Path>>(
server_id: usize,
ip: &str,
base_port: usize,
queues: BTreeSet<String>,
db_path: P,
) -> Box<dyn Future<Item = (), Error = ()> + Send> {
let context = Arc::new(Context::new());
Self::init_with_context(server_id, ip, base_port, queues, db_path, context)
}
/// The same as `ServerConfig::init()`, but with a provided ZeroMQ Context.
///
/// This can be useful if you have other uses of ZeroMQ in your application, and want to share
/// a context with your dependencies.
///
/// If you're running the Server, Worker, and Spawner in the same application, you should share
/// a ZeroMQ context between them.
pub fn init_with_context<P: AsRef<Path>>(
server_id: usize,
ip: &str,
base_port: usize,
queues: BTreeSet<String>,
db_path: P,
context: Arc<Context>,
) -> Box<dyn Future<Item = (), Error = ()> + Send> {
let config = Config {
server_id,
ip: ip.to_owned(),
base_port,
queues,
db_path: db_path.as_ref().to_owned(),
context,
};
config.create_server()
}
}

126
jobs-server/src/server/portmap.rs
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@ -1,126 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::{collections::BTreeMap, sync::Arc, time::Duration};
use failure::Error;
use futures::{Future, Stream};
#[cfg(feature = "futures-zmq")]
use futures_zmq::{prelude::*, Multipart, Rep};
use log::{error, info};
use tokio::timer::Delay;
#[cfg(feature = "tokio-zmq")]
use tokio_zmq::{prelude::*, Multipart, Rep};
use zmq::Message;
use crate::server::Config;
pub(crate) struct PortMapConfig {
rep: Rep,
address: String,
port_map: BTreeMap<String, usize>,
config: Arc<Config>,
}
impl PortMapConfig {
pub(crate) fn init(
address: String,
port_map: BTreeMap<String, usize>,
config: Arc<Config>,
) -> impl Future<Item = (), Error = ()> {
let cfg = ResetPortMapConfig {
address,
port_map,
config,
};
cfg.build().map_err(|e| error!("Error starting rep, {}", e))
}
fn run(self) -> Box<dyn Future<Item = (), Error = ()> + Send> {
let reset = self.reset();
let PortMapConfig {
rep,
address: _,
port_map,
config: _,
} = self;
let (sink, stream) = rep.sink_stream(1).split();
let fut = stream
.from_err::<Error>()
.and_then(move |_| {
let s = serde_json::to_string(&port_map)?;
let m = Message::from_slice(s.as_ref())?;
Ok(Multipart::from(m))
})
.forward(sink)
.map(move |_| info!("portmap rep shutting down"))
.map_err(|e| {
error!("Error sending portmap, {}", e);
tokio::spawn(reset.rebuild());
});
Box::new(fut)
}
fn reset(&self) -> ResetPortMapConfig {
ResetPortMapConfig {
address: self.address.clone(),
port_map: self.port_map.clone(),
config: self.config.clone(),
}
}
}
struct ResetPortMapConfig {
address: String,
port_map: BTreeMap<String, usize>,
config: Arc<Config>,
}
impl ResetPortMapConfig {
fn rebuild(self) -> impl Future<Item = (), Error = ()> {
Delay::new(tokio::clock::now() + Duration::from_secs(5))
.from_err()
.and_then(move |_| self.build())
.map_err(|e| error!("Error restarting rep, {}", e))
}
fn build(self) -> impl Future<Item = (), Error = Error> {
Rep::builder(self.config.context.clone())
.bind(&self.address)
.build()
.map(|rep| {
let config = PortMapConfig {
rep,
address: self.address,
port_map: self.port_map,
config: self.config,
};
tokio::spawn(config.run());
})
.from_err()
}
}

187
jobs-server/src/server/pull.rs
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@ -1,187 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::{sync::Arc, time::Duration};
use background_jobs_core::{JobInfo, NewJobInfo, Storage};
use failure::{Error, Fail};
use futures::{future::poll_fn, Future, Stream};
#[cfg(feature = "futures-zmq")]
use futures_zmq::{prelude::*, Multipart, Pull};
use log::{error, info, trace};
use serde_derive::Deserialize;
use tokio::timer::Delay;
use tokio_threadpool::blocking;
#[cfg(feature = "tokio-zmq")]
use tokio_zmq::{prelude::*, Multipart, Pull};
use crate::server::{coerce, Config};
#[derive(Clone, Debug, Deserialize)]
#[serde(untagged)]
enum EitherJob {
Existing(JobInfo),
New(NewJobInfo),
}
pub(crate) struct PullConfig {
server_id: usize,
puller: Pull,
address: String,
storage: Arc<Storage>,
config: Arc<Config>,
}
impl PullConfig {
pub(crate) fn init(
server_id: usize,
address: String,
storage: Arc<Storage>,
config: Arc<Config>,
) -> impl Future<Item = (), Error = ()> {
let cfg = ResetPullConfig {
server_id,
address,
storage,
config,
};
cfg.build()
.map_err(|e| error!("Error starting puller, {}", e))
}
fn run(self) -> Box<dyn Future<Item = (), Error = ()> + Send> {
let config = self.reset();
let server_id = self.server_id;
let storage = self.storage.clone();
let fut = self
.puller
.stream()
.from_err()
.map(|m| {
trace!("Handling new message");
m
})
.and_then(parse_job)
.and_then(move |job| {
trace!("Storing job, {:?}", job);
store_job(job, storage.clone(), server_id)
})
.for_each(|_| Ok(()))
.map(|_| info!("Puller is shutting down"))
.map_err(|e| {
error!("Error storing job, {}", e);
tokio::spawn(config.rebuild());
});
Box::new(fut)
}
fn reset(&self) -> ResetPullConfig {
ResetPullConfig {
server_id: self.server_id,
address: self.address.clone(),
storage: self.storage.clone(),
config: self.config.clone(),
}
}
}
#[derive(Clone, Debug, Fail)]
#[fail(display = "Message was empty")]
pub struct EmptyMessage;
fn parse_job(mut multipart: Multipart) -> Result<EitherJob, Error> {
let unparsed_msg = multipart.pop_front().ok_or(EmptyMessage)?;
let parsed = serde_json::from_slice(&unparsed_msg)?;
Ok(parsed)
}
fn store_job(
job: EitherJob,
storage: Arc<Storage>,
server_id: usize,
) -> impl Future<Item = (), Error = Error> {
let storage = storage.clone();
poll_fn(move || {
let job = job.clone();
let storage = storage.clone();
blocking(move || {
let job = match job {
EitherJob::New(new_job) => storage.assign_id(new_job, server_id)?,
EitherJob::Existing(job) => job,
};
if job.is_pending() {
info!("Storing pending job, {}", job.id());
}
if job.is_finished() {
info!("Finished job {}", job.id());
}
if job.is_failed() {
info!("Job failed {}", job.id());
}
storage.store_job(job, server_id).map_err(Error::from)
})
.map_err(Error::from)
})
.then(coerce)
}
struct ResetPullConfig {
server_id: usize,
address: String,
storage: Arc<Storage>,
config: Arc<Config>,
}
impl ResetPullConfig {
fn rebuild(self) -> impl Future<Item = (), Error = ()> {
Delay::new(tokio::clock::now() + Duration::from_secs(5))
.from_err()
.and_then(move |_| self.build())
.map_err(|e| error!("Error restarting puller, {}", e))
}
fn build(self) -> impl Future<Item = (), Error = Error> {
Pull::builder(self.config.context.clone())
.bind(&self.address)
.build()
.map(|puller| {
let config = PullConfig {
server_id: self.server_id,
puller,
address: self.address,
storage: self.storage,
config: self.config,
};
tokio::spawn(config.run());
})
.from_err()
}
}

193
jobs-server/src/server/push.rs
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@ -1,193 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::{sync::Arc, time::Duration};
use background_jobs_core::{JobInfo, Storage};
use failure::Error;
use futures::{future::poll_fn, stream::iter_ok, Future, Stream};
#[cfg(feature = "futures-zmq")]
use futures_zmq::{prelude::*, Multipart, Push};
use log::{error, info};
use tokio::timer::{Delay, Interval};
use tokio_threadpool::blocking;
#[cfg(feature = "tokio-zmq")]
use tokio_zmq::{prelude::*, Multipart, Push};
use zmq::Message;
use crate::server::{coerce, Config};
pub(crate) struct PushConfig {
server_id: usize,
pusher: Push,
address: String,
queue: String,
storage: Arc<Storage>,
config: Arc<Config>,
}
impl PushConfig {
pub(crate) fn init(
server_id: usize,
address: String,
queue: String,
storage: Arc<Storage>,
config: Arc<Config>,
) -> impl Future<Item = (), Error = ()> {
let cfg = ResetPushConfig {
server_id,
address,
queue,
storage,
config,
};
cfg.build()
.map_err(|e| error!("Error starting pusher, {}", e))
}
fn run(self) -> Box<dyn Future<Item = (), Error = ()> + Send> {
let reset = self.reset();
let PushConfig {
server_id,
address: _,
pusher,
queue,
storage,
config: _,
} = self;
let queue_2_electric_boogaloo = queue.clone();
let fut = Interval::new(tokio::clock::now(), Duration::from_millis(250))
.from_err()
.and_then(move |_| dequeue_jobs(storage.clone(), queue.clone(), server_id))
.flatten()
.forward(pusher.sink(25))
.map(move |_| {
info!(
"Pusher for queue {} is shutting down",
queue_2_electric_boogaloo
)
})
.map_err(|e| {
error!("Error dequeuing job, {}", e);
tokio::spawn(reset.rebuild());
});
Box::new(fut)
}
fn reset(&self) -> ResetPushConfig {
ResetPushConfig {
server_id: self.server_id,
address: self.address.clone(),
queue: self.queue.clone(),
storage: self.storage.clone(),
config: self.config.clone(),
}
}
}
fn dequeue_jobs(
storage: Arc<Storage>,
queue: String,
server_id: usize,
) -> impl Future<Item = impl Stream<Item = Multipart, Error = Error>, Error = Error> {
poll_fn(move || {
let storage = storage.clone();
let queue = queue.clone();
blocking(move || wrap_fetch_queue(storage, &queue, server_id))
})
.then(coerce)
.map(|jobs| iter_ok(jobs))
.or_else(|e| {
error!("Error fetching jobs, {}", e);
Ok(iter_ok(vec![]))
})
}
fn wrap_fetch_queue(
storage: Arc<Storage>,
queue: &str,
server_id: usize,
) -> Result<Vec<Multipart>, Error> {
let response = fetch_queue(storage, queue, server_id)?;
let jobs = response
.into_iter()
.map(|job| {
serde_json::to_string(&job)
.map_err(Error::from)
.and_then(|json| Message::from_slice(json.as_ref()).map_err(Error::from))
.map(Multipart::from)
})
.collect::<Result<Vec<_>, Error>>()?;
Ok(jobs)
}
fn fetch_queue(
storage: Arc<Storage>,
queue: &str,
server_id: usize,
) -> Result<Vec<JobInfo>, Error> {
storage
.stage_jobs(10, queue, server_id)
.map_err(Error::from)
}
struct ResetPushConfig {
server_id: usize,
address: String,
queue: String,
storage: Arc<Storage>,
config: Arc<Config>,
}
impl ResetPushConfig {
fn rebuild(self) -> impl Future<Item = (), Error = ()> {
Delay::new(tokio::clock::now() + Duration::from_secs(5))
.from_err()
.and_then(move |_| self.build())
.map_err(|e| error!("Error restarting pusher, {}", e))
}
fn build(self) -> impl Future<Item = (), Error = Error> {
info!("Building and spawning new server");
Push::builder(self.config.context.clone())
.bind(&self.address)
.build()
.map(|pusher| {
let config = PushConfig {
server_id: self.server_id,
pusher,
address: self.address,
queue: self.queue,
storage: self.storage,
config: self.config,
};
tokio::spawn(config.run());
})
.from_err()
}
}

78
jobs-server/src/server/stalled.rs
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@ -1,78 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::{sync::Arc, time::Duration};
use background_jobs_core::Storage;
use failure::Error;
use futures::{future::poll_fn, Future, Stream};
use log::{error, info};
use tokio::timer::{Delay, Interval};
use tokio_threadpool::blocking;
use crate::server::coerce;
#[derive(Clone)]
pub(crate) struct StalledConfig {
server_id: usize,
storage: Arc<Storage>,
}
impl StalledConfig {
pub(crate) fn init(server_id: usize, storage: Arc<Storage>) {
let cfg = StalledConfig { server_id, storage };
tokio::spawn(cfg.run());
}
fn run(self) -> Box<dyn Future<Item = (), Error = ()> + Send> {
let reset = self.clone();
let StalledConfig { server_id, storage } = self;
let fut = Interval::new(tokio::clock::now(), Duration::from_secs(60 * 30))
.from_err::<Error>()
.and_then(move |_| {
let storage = storage.clone();
poll_fn(move || {
let storage = storage.clone();
blocking(move || storage.check_stalled_jobs(server_id).map_err(Error::from))
})
.from_err()
})
.then(coerce)
.for_each(|_| Ok(()))
.map(|_| info!("Stalled Job Checker is shutting down"))
.map_err(|e| {
error!("Error checking stalled jobs, {}", e);
tokio::spawn(reset.rebuild());
});
Box::new(fut)
}
fn rebuild(self) -> impl Future<Item = (), Error = ()> {
Delay::new(tokio::clock::now() + Duration::from_secs(5))
.from_err::<Error>()
.map(move |_| tokio::spawn(self.run()))
.map(|_| ())
.map_err(|e| error!("Error restarting stalled job checker, {}", e))
}
}

130
jobs-server/src/spawner.rs
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@ -1,130 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::sync::Arc;
use background_jobs_core::Processor;
use failure::Error;
use futures::{future::IntoFuture, Future};
#[cfg(feature = "futures-zmq")]
use futures_zmq::{prelude::*, Push};
use log::{debug, trace};
#[cfg(feature = "tokio-zmq")]
use tokio_zmq::{prelude::*, Push};
use zmq::{Context, Message};
/// SpawnerConfig is the only part of this library required to actually exist in your application.
///
/// This type is used to queue new jobs into the `background-jobs` server.
///
/// ```rust,ignore
/// let spawner = SpawnerConfig::new("localhost", 5555);
///
/// tokio::spawn(
/// spawner
/// .queue::<MyProcessor, _>(job)
/// .map_err(|_| ()),
/// );
/// ```
pub struct SpawnerConfig {
server: String,
ctx: Arc<Context>,
}
impl SpawnerConfig {
/// Create a `SpawnerConfig`
///
/// - `server_host` is the hostname or IP address of the host that the server is running on
/// - `base_port` is the same `base_port` from the server config. The spawner will only ever
/// need to communicate over `base_port`
pub fn new(server_host: &str, base_port: usize) -> Self {
let ctx = Arc::new(Context::new());
Self::new_with_context(server_host, base_port, ctx)
}
/// The same as `SpawnerConfig::new()`, but with a provided ZeroMQ Context.
///
/// This can be useful if you have other uses of ZeroMQ in your application, and want to share
/// a context with your dependencies.
///
/// If you're running the Server, Worker, and Spawner in the same application, you should share
/// a ZeroMQ context between them.
pub fn new_with_context(server_host: &str, base_port: usize, ctx: Arc<Context>) -> Self {
SpawnerConfig {
server: format!("tcp://{}:{}", server_host, base_port),
ctx,
}
}
/// Queue a job to be executed in the background
pub fn queue<P, S>(&self, job: P::Job) -> impl Future<Item = (), Error = Error>
where
P: Processor<S>,
S: Clone + Send + Sync + 'static,
{
let msg = P::new_job(job)
.map_err(Error::from)
.and_then(|job_info| serde_json::to_string(&job_info).map_err(Error::from))
.and_then(|s| {
Message::from_slice(s.as_ref())
.map(|m| m.into())
.map_err(Error::from)
})
.into_future();
debug!("Sending message to {}", self.server);
Push::builder(self.ctx.clone())
.connect(&self.server)
.build()
.from_err()
.join(msg)
.and_then(move |(push, msg)| {
trace!("Sending");
push.send(msg).from_err().map(|_| trace!("sent"))
})
}
/// `queue_sync` is the same as Queue, except that it blocks the current thread while it is
/// sending the message to the jobs server.
///
/// If you have a tokio-based application, you should use `queue` instead.
pub fn queue_sync<P, S>(&self, job: P::Job) -> Result<(), Error>
where
P: Processor<S>,
S: Clone + Send + Sync + 'static,
{
use zmq::PUSH;
let job_info = P::new_job(job)?;
let msg_string = serde_json::to_string(&job_info)?;
let msg = Message::from_slice(msg_string.as_ref())?;
let socket = self.ctx.socket(PUSH)?;
socket.connect(&self.server)?;
trace!("Sending");
socket.send_msg(msg, 0)?;
trace!("Sent");
Ok(())
}
}

228
jobs-server/src/worker/config.rs
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@ -1,228 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::{sync::Arc, time::Duration};
use background_jobs_core::{JobInfo, ProcessorMap};
use failure::{Error, Fail};
use futures::{
sync::mpsc::{channel, Sender},
Future, Sink, Stream,
};
#[cfg(feature = "futures-zmq")]
use futures_zmq::{prelude::*, Multipart, Pull, Push};
use log::{error, info};
use tokio::timer::Delay;
#[cfg(feature = "tokio-zmq")]
use tokio_zmq::{prelude::*, Multipart, Pull, Push};
use zmq::{Context, Message};
pub(crate) struct Worker<S>
where
S: Clone,
{
pull: Pull,
push: Push,
push_address: String,
pull_address: String,
queue: String,
processors: Arc<ProcessorMap<S>>,
context: Arc<Context>,
}
impl<S> Worker<S>
where
S: Clone + Send + Sync + 'static,
{
pub(crate) fn init(
push_address: String,
pull_address: String,
queue: String,
processors: Arc<ProcessorMap<S>>,
context: Arc<Context>,
) -> impl Future<Item = (), Error = ()> {
let cfg = ResetWorker {
push_address,
pull_address,
queue: queue.clone(),
processors,
context,
};
cfg.build()
.map_err(move |e| error!("Error starting worker for queue {}, {}", queue, e))
}
fn run(self) -> Box<dyn Future<Item = (), Error = ()> + Send> {
let reset = self.reset();
let Worker {
push,
pull,
push_address: _,
pull_address: _,
queue,
processors,
context: _,
} = self;
let (tx, rx) = channel(5);
let tx2 = tx.clone();
tokio::spawn(
rx.map_err(|_| RecvError)
.from_err::<Error>()
.and_then(serialize_request)
.forward(push.sink(1))
.map(|_| ())
.or_else(|_| Ok(())),
);
let fut = pull
.stream()
.from_err::<Error>()
.and_then(parse_multipart)
.and_then(move |job| report_running(job, tx.clone()))
.and_then(move |job| process_job(job, &processors))
.forward(tx2)
.map(move |_| info!("worker for queue {} is shutting down", queue))
.map_err(|e| {
error!("Error processing job, {}", e);
tokio::spawn(reset.rebuild());
});
Box::new(fut)
}
fn reset(&self) -> ResetWorker<S> {
ResetWorker {
push_address: self.push_address.clone(),
pull_address: self.pull_address.clone(),
queue: self.queue.clone(),
processors: self.processors.clone(),
context: self.context.clone(),
}
}
}
struct ResetWorker<S>
where
S: Clone,
{
push_address: String,
pull_address: String,
queue: String,
processors: Arc<ProcessorMap<S>>,
context: Arc<Context>,
}
impl<S> ResetWorker<S>
where
S: Clone + Send + Sync + 'static,
{
fn rebuild(self) -> impl Future<Item = (), Error = ()> {
let queue = self.queue.clone();
Delay::new(tokio::clock::now() + Duration::from_secs(5))
.from_err()
.and_then(move |_| self.build())
.map_err(move |e| error!("Error restarting worker for queue {}, {}", queue, e))
}
fn build(self) -> impl Future<Item = (), Error = Error> {
Push::builder(self.context.clone())
.connect(&self.push_address)
.build()
.join(
Pull::builder(self.context.clone())
.connect(&self.pull_address)
.build(),
)
.map(|(push, pull)| {
let config = Worker {
push,
pull,
push_address: self.push_address,
pull_address: self.pull_address,
queue: self.queue,
processors: self.processors,
context: self.context,
};
tokio::spawn(config.run());
})
.from_err()
}
}
fn serialize_request(job: JobInfo) -> Result<Multipart, Error> {
let request = serde_json::to_string(&job)?;
let msg = Message::from_slice(request.as_ref())?;
Ok(msg.into())
}
fn parse_multipart(mut multipart: Multipart) -> Result<JobInfo, Error> {
let message = multipart.pop_front().ok_or(ParseError)?;
let parsed = serde_json::from_slice(&message)?;
Ok(parsed)
}
fn report_running(
mut job: JobInfo,
push: Sender<JobInfo>,
) -> impl Future<Item = JobInfo, Error = Error> {
job.set_running();
push.send(job.clone())
.map(move |_| job)
.map_err(|_| NotifyError.into())
}
fn process_job<S>(
job: JobInfo,
processors: &ProcessorMap<S>,
) -> impl Future<Item = JobInfo, Error = Error>
where
S: Clone + Send + Sync + 'static,
{
processors
.process_job(job.clone())
.map_err(|_| ProcessError)
.from_err()
}
#[derive(Clone, Debug, Fail)]
#[fail(display = "Error parsing job")]
struct ParseError;
#[derive(Clone, Debug, Fail)]
#[fail(display = "Error processing job")]
struct ProcessError;
#[derive(Clone, Debug, Fail)]
#[fail(display = "Error notifying running has started")]
struct NotifyError;
#[derive(Clone, Debug, Fail)]
#[fail(display = "Error receiving from mpsc")]
struct RecvError;

189
jobs-server/src/worker/mod.rs
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@ -1,189 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::{collections::BTreeMap, sync::Arc};
use background_jobs_core::{Processor, ProcessorMap};
use failure::Fail;
use futures::Future;
use log::{error, info};
use zmq::Context;
mod config;
mod portmap;
use self::{config::Worker, portmap::PortMap};
/// The entry point for creating a background-jobs worker.
///
/// A worker handles the processing of jobs, but not the queueing or storing of jobs. It connects
/// to a server (crated with
/// [`ServerConfig`](https://docs.rs/background-jobs-server/0.4.0/background_jobs_server/struct.ServerConfig.html))
/// and receives work from there.
///
/// ```rust
/// use std::collections::BTreeMap;
/// use background_jobs_server::WorkerConfig;
/// use failure::Error;
///
/// fn main() -> Result<(), Error> {
/// let mut queue_map = BTreeMap::new();
/// queue_map.insert("default".to_owned(), 10);
///
/// let mut worker = WorkerConfig::new((), "localhost".to_owned(), 5555, queue_map);
///
/// // Register a processor
/// // worker.register_processor(MyProcessor);
///
/// // Run the workers
/// // tokio::run(worker.run());
///
/// Ok(())
/// }
/// ```
pub struct WorkerConfig<S>
where
S: Clone,
{
processors: ProcessorMap<S>,
queues: BTreeMap<String, usize>,
server_host: String,
base_port: usize,
context: Arc<Context>,
}
impl<S> WorkerConfig<S>
where
S: Clone + Send + Sync + 'static,
{
/// Create a new worker
///
/// This method takes four arguments
/// - The state passed into this method will be passed to all jobs executed on this Worker.
/// The state argument could be useful for containing a hook into something like r2d2, or
/// the address of an actor in an actix-based system.
/// - `server_host` is the hostname, or IP address, of the background-jobs server.
/// - `base_port` is the same value from the `ServerConfig` initialization. It dictates the
/// port the worker uses to return jobs to the server. The worker is guaranteed to connect
/// to at least 2 other ports on the server when functioning properly, `base_port` + 1, and
/// `base_port` + n.
/// - queues is a mapping between the name of a queue, and the number of workers that should
/// be started to process jobs in that queue.
pub fn new(
state: S,
server_host: String,
base_port: usize,
queues: BTreeMap<String, usize>,
) -> Self {
let context = Arc::new(Context::new());
Self::new_with_context(state, server_host, base_port, queues, context)
}
/// The same as `WorkerConfig::new()`, but with a provided ZeroMQ Context.
///
/// This can be useful if you have other uses of ZeroMQ in your application, and want to share
/// a context with your dependencies.
///
/// If you're running the Server, Worker, and Spawner in the same application, you should share
/// a ZeroMQ context between them.
pub fn new_with_context(
state: S,
server_host: String,
base_port: usize,
queues: BTreeMap<String, usize>,
context: Arc<Context>,
) -> Self {
WorkerConfig {
processors: ProcessorMap::new(state),
server_host,
base_port,
queues,
context,
}
}
/// Register a processor with this worker
///
/// For more information, see
/// [`Processor`](https://docs.rs/background-jobs/0.4.0/background_jobs/enum.Processor.html).
pub fn register_processor<P>(&mut self, processor: P)
where
P: Processor<S> + Send + Sync + 'static,
{
self.processors.register_processor(processor);
}
/// Start the workers
///
/// This method returns a future that, when run, spawns all of the worker's required futures
/// onto tokio. Therefore, this can only be used from tokio.
pub fn run(self) -> Box<dyn Future<Item = (), Error = ()> + Send>
where
S: Send + Sync + 'static,
{
let WorkerConfig {
processors,
server_host,
base_port,
queues,
context,
} = self;
info!("Starting workers");
let processors = Arc::new(processors);
let push_address = format!("tcp://{}:{}", server_host, base_port);
let portmap_address = format!("tcp://{}:{}", server_host, base_port + 1);
info!("push address, {}", push_address);
info!("portmap address, {}", portmap_address);
let fut = PortMap::init(portmap_address, context.clone())
.and_then(move |port_map| {
info!("Got port_map, {:?}", port_map);
for (queue, num) in queues.iter() {
let port = port_map.get(queue).ok_or(MissingQueue(queue.to_owned()))?;
let pull_address = format!("tcp://{}:{}", server_host, port);
for _ in 0..*num {
tokio::spawn(Worker::init(
push_address.clone(),
pull_address.clone(),
queue.to_owned(),
processors.clone(),
context.clone(),
));
}
}
Ok(())
})
.map_err(|e| error!("Error starting worker, {}", e));
Box::new(fut)
}
}
#[derive(Clone, Debug, Fail)]
#[fail(display = "Could not find queue, {}", _0)]
struct MissingQueue(String);

59
jobs-server/src/worker/portmap.rs
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@ -1,59 +0,0 @@
/*
* This file is part of Background Jobs.
*
* Copyright © 2018 Riley Trautman
*
* Background Jobs is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Background Jobs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Background Jobs. If not, see <http://www.gnu.org/licenses/>.
*/
use std::{collections::BTreeMap, sync::Arc};
use failure::{Error, Fail};
use futures::Future;
#[cfg(feature = "futures-zmq")]
use futures_zmq::{prelude::*, Req};
#[cfg(feature = "tokio-zmq")]
use tokio_zmq::{prelude::*, Req};
use zmq::{Context, Message};
pub(crate) struct PortMap;
impl PortMap {
pub(crate) fn init(
address: String,
context: Arc<Context>,
) -> impl Future<Item = BTreeMap<String, usize>, Error = Error> {
Req::builder(context.clone())
.connect(&address)
.build()
.from_err()
.and_then(|req| {
Message::from_slice(b"h")
.map_err(Error::from)
.map(move |msg| (req, msg.into()))
})
.and_then(|(req, msg)| req.send(msg).and_then(|req| req.recv()).from_err())
.and_then(|(mut multipart, _)| {
let msg = multipart.pop_front().ok_or(EmptyMessage)?;
let map = serde_json::from_slice(&msg)?;
Ok(map)
})
}
}
#[derive(Clone, Debug, Fail)]
#[fail(display = "Message was empty")]
struct EmptyMessage;