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use std::io::{self, Error, ErrorKind, Write};
use std::sync::{Arc, Mutex};
use std::sync::mpsc::{Receiver, channel};
use std::thread;
use itertools::Itertools;
use scheduler_client::SchedulerClient;
use recordio::RecordIOCodec;
use proto::mesos::{FrameworkID, Offer};
use proto::scheduler::*;
use {Scheduler, SchedulerConf, util};
pub trait SchedulerRouter {
fn run(&mut self,
rx: Receiver<io::Result<Event>>,
client: SchedulerClient,
conf: SchedulerConf);
}
enum State {
Connected,
Disconnected,
}
impl State {
fn is_connected(&self) -> bool {
match *self {
State::Connected => true,
_ => false,
}
}
}
pub struct ProtobufCallbackRouter<'a> {
pub scheduler: &'a mut Scheduler,
pub conf: SchedulerConf,
}
impl <'a> SchedulerRouter for ProtobufCallbackRouter<'a> {
fn run(&mut self,
rx: Receiver<io::Result<Event>>,
client: SchedulerClient,
conf: SchedulerConf) {
let mut state = State::Connected;
for e in rx {
if e.is_err() {
if state.is_connected() {
state = State::Disconnected;
self.scheduler.disconnected();
}
continue;
}
state = State::Connected;
let event = e.unwrap();
match event.get_field_type() {
Event_Type::SUBSCRIBED => {
let subscribed = event.get_subscribed();
{
let mut framework_id = client.framework_id
.lock()
.unwrap();
*framework_id = Some(subscribed.get_framework_id()
.clone());
}
let heartbeat_interval_seconds =
if !subscribed.has_heartbeat_interval_seconds() {
None
} else {
Some(subscribed.get_heartbeat_interval_seconds())
};
self.scheduler.subscribed(&client,
subscribed.get_framework_id(),
heartbeat_interval_seconds)
}
Event_Type::OFFERS => {
let offers = event.get_offers();
// Split offers per-agent to save users the time of
// doing so.
for (_, offers) in offers.get_offers()
.iter()
.group_by(|o| o.get_agent_id()) {
self.scheduler.offers(&client, offers.to_vec());
}
for (_, inverse_offers) in offers.get_inverse_offers()
.iter()
.group_by(|o| {
o.get_agent_id()
}) {
self.scheduler
.inverse_offers(&client, inverse_offers.to_vec());
}
}
Event_Type::RESCIND =>
self.scheduler
.rescind(&client, event.get_rescind().get_offer_id()),
Event_Type::UPDATE => {
let status = event.get_update().get_status();
self.scheduler.update(&client, status);
if self.conf.implicit_acknowledgements {
client.acknowledge(status.get_agent_id().clone(),
status.get_task_id().clone(),
status.get_uuid().to_vec());
}
}
Event_Type::MESSAGE => {
let message = event.get_message();
self.scheduler.message(&client,
message.get_agent_id(),
message.get_executor_id(),
message.get_data().to_vec())
}
Event_Type::FAILURE => {
let failure = event.get_failure();
let agent_id = if !failure.has_agent_id() {
None
} else {
Some(failure.get_agent_id())
};
let executor_id = if !failure.has_executor_id() {
None
} else {
Some(failure.get_executor_id())
};
let status = if !failure.has_status() {
None
} else {
Some(failure.get_status())
};
self.scheduler
.failure(&client, agent_id, executor_id, status)
}
Event_Type::ERROR => self.scheduler.error(&client,
event.get_error()
.get_message()
.to_string()),
Event_Type::HEARTBEAT => self.scheduler.heartbeat(&client),
}
}
}
}