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#![deny(missing_docs)]
#[cfg(test)]
extern crate futures;
extern crate int_compute;
extern crate libflow;
extern crate libdata;
#[cfg(test)]
extern crate libutils;
#[macro_use]
extern crate slog;
extern crate tokio_core;
use std::cmp::Ordering;
use slog::Logger;
use tokio_core::reactor::Handle;
use int_compute::{Event, Factory as CompFactory, IntCompute, Query};
use libdata::flow::{Name, Names};
use libdata::column::{self, Ident, Local, Remote, Tags, Value};
use libflow::update::{CorkedUpdate, Key, Status, Update, UpdateSenderUnbounded};
pub struct Compute {
logger: Logger,
channel: UpdateSenderUnbounded,
}
impl IntCompute for Compute {
fn event(&mut self, event: &Event, _flow_query: &Query) {
match *event {
Event::CorkRequest(ref cork) => {
trace!(self.logger, "Pushing a cork");
self.channel
.unbounded_send(CorkedUpdate::Cork(cork.clone()))
.expect("Event called when the update channel already closed");
},
Event::FlowUpdated { ref flow, ref columns } => {
let borrow = flow.borrow();
let mut tags = Tags::new();
macro_rules! check {
($enp: ident) => {
let ident = Ident::of::<$enp<Names>>();
if columns.contains(&ident) {
trace!(self.logger, concat!("Computing ",
stringify!($enp),
" primary name"));
let &$enp(ref names) = borrow
.get(&ident)
.expect("Must be there because of the update")
.downcast_ref::<$enp<Names>>()
.expect("Type mismatch");
let primary = names
.iter()
.min_by(|a, b| match (a.0.len().cmp(&b.0.len()), a.cmp(b)) {
(Ordering::Equal, lex) => lex,
(len, _) => len,
})
.cloned();
if let Some(name) = primary {
let val = Value::from($enp(name));
let existing = borrow.get(&Ident::of::<$enp<Name>>());
if Some(&val) != existing {
tags.insert(val);
}
}
}
};
}
check!(Local);
check!(Remote);
if !tags.is_empty() {
let update = Update {
keys: vec![Key::InternalHandle(flow.clone())],
status: Status::Ongoing,
tags,
stats: None,
};
self.channel
.unbounded_send(CorkedUpdate::Update(update))
.expect("Event called when the update channel already closed");
}
},
_ => (),
}
}
}
pub struct Factory;
impl CompFactory for Factory {
fn create(self, logger: &Logger, _handle: Handle, channel: UpdateSenderUnbounded)
-> Box<IntCompute>
{
let logger = logger.new(o!("context" => "primary name"));
info!(logger, "Creating internal compute for primary DNS name");
column::register_endpoint::<Name>();
let comp = Compute {
logger,
channel,
};
Box::new(comp)
}
}
#[cfg(test)]
mod tests {
use futures::Stream;
use futures::unsync::mpsc;
use libdata::flow::{Direction, Name};
use libdata::column::{FlowTags, RefHeaders};
use libflow::update;
use libutils;
use super::*;
struct FakeQuery;
impl Query for FakeQuery {
fn query<'a, 'b, 'r>(&'a self, _filter: &'b RefHeaders<'b>)
-> Box<Iterator<Item = FlowTags> + 'r>
where
'a: 'r,
'b: 'r
{
unimplemented!();
}
}
#[test]
fn event() {
let logger = libutils::test_logger();
let (sender, receiver) = mpsc::unbounded();
let mut iter = receiver.wait();
let mut comp = Compute { logger, channel: sender };
let (cork, _handle) = update::cork();
let fake_query = FakeQuery;
let cork_event = Event::CorkRequest(cork);
comp.event(&cork_event, &fake_query);
if let Some(Ok(CorkedUpdate::Cork(_))) = iter.next() { } else {
panic!("Expected cork");
}
let mut tags = Tags::new();
let names = vec![
"www.example.com",
"example.com",
"cdn1.atlantis.www.example.com"
]
.into_iter()
.map(String::from)
.map(Name::new)
.collect::<Names>();
tags.insert(Local(names));
let flow = FlowTags::new(tags);
let columns = vec![Ident::of::<Local<Names>>()]
.into_iter()
.collect();
let relevant_event = Event::FlowUpdated {
flow: flow.clone(),
columns,
};
comp.event(&relevant_event, &fake_query);
if let Some(Ok(CorkedUpdate::Update(update))) = iter.next() {
assert_eq!(1, update.keys.len());
assert_eq!(1, update.tags.len());
let val = update.tags
.get(&Ident::of::<Local<Name>>())
.expect("Missing update to primary local name")
.downcast_ref::<Local<Name>>()
.expect("Wrong type of the update");
assert_eq!(Local(Name("example.com".to_owned())), *val);
} else {
panic!("Expected an update");
}
let columns = vec![Ident::of::<Direction>()]
.into_iter()
.collect();
let unrelated_option = Event::FlowUpdated {
flow: flow.clone(),
columns,
};
comp.event(&unrelated_option, &fake_query);
let terminated_event = Event::FlowTerminated(flow.clone());
comp.event(&terminated_event, &fake_query);
flow.borrow_mut().insert(Local(Name("example.com".to_owned())));
comp.event(&relevant_event, &fake_query);
comp.event(&cork_event, &fake_query);
if let Some(Ok(CorkedUpdate::Cork(_))) = iter.next() { } else {
panic!("Expected cork");
}
drop(comp);
assert!(iter.next().is_none());
}
}