From 41c2899e3ca0f42f4d74f053c6770a5a16700e56 Mon Sep 17 00:00:00 2001
From: Daiderd Jordan <daiderd@gmail.com>
Date: Wed, 20 May 2020 23:28:56 +0200
Subject: [PATCH] convert stats to easyamqp

---
 ofborg/src/bin/stats.rs | 123 ++++++++++++++++++----------------------
 1 file changed, 55 insertions(+), 68 deletions(-)

diff --git a/ofborg/src/bin/stats.rs b/ofborg/src/bin/stats.rs
index bcf3dd1..1650be7 100644
--- a/ofborg/src/bin/stats.rs
+++ b/ofborg/src/bin/stats.rs
@@ -1,96 +1,83 @@
-use ofborg::easyamqp::{ChannelExt, ConsumerExt};
-use ofborg::{config, easyamqp, stats, tasks, worker};
-
 use std::env;
+use std::error::Error;
 use std::thread;
 
-use amqp::Basic;
+use async_std::task;
 use hyper::server::{Request, Response, Server};
 use tracing::info;
 
-fn main() {
-    let cfg = config::load(env::args().nth(1).unwrap().as_ref());
+use ofborg::easyamqp::{ChannelExt, ConsumerExt};
+use ofborg::{config, easyamqp, easylapin, stats, tasks};
+
+fn main() -> Result<(), Box<dyn Error>> {
     ofborg::setup_log();
 
-    info!("Hello, world!");
+    let arg = env::args().nth(1).expect("usage: stats <config>");
+    let cfg = config::load(arg.as_ref());
 
-    let mut session = easyamqp::session_from_config(&cfg.rabbitmq).unwrap();
-    info!("Connected to rabbitmq");
+    let conn = easylapin::from_config(&cfg.rabbitmq)?;
+    let mut chan = task::block_on(conn.create_channel())?;
 
-    let events = stats::RabbitMQ::from_amqp(
+    let events = stats::RabbitMQ::from_lapin(
         &format!("{}-{}", cfg.runner.identity.clone(), cfg.nix.system.clone()),
-        session.open_channel(3).unwrap(),
+        task::block_on(conn.create_channel())?,
     );
 
     let metrics = stats::MetricCollector::new();
-
     let collector = tasks::statscollector::StatCollectorWorker::new(events, metrics.clone());
 
-    let mut channel = session.open_channel(1).unwrap();
-    channel
-        .declare_exchange(easyamqp::ExchangeConfig {
-            exchange: "stats".to_owned(),
-            exchange_type: easyamqp::ExchangeType::Fanout,
-            passive: false,
-            durable: true,
-            auto_delete: false,
-            no_wait: false,
-            internal: false,
-        })
-        .unwrap();
+    chan.declare_exchange(easyamqp::ExchangeConfig {
+        exchange: "stats".to_owned(),
+        exchange_type: easyamqp::ExchangeType::Fanout,
+        passive: false,
+        durable: true,
+        auto_delete: false,
+        no_wait: false,
+        internal: false,
+    })?;
 
-    channel
-        .declare_queue(easyamqp::QueueConfig {
+    let queue_name = String::from("stats-events");
+    chan.declare_queue(easyamqp::QueueConfig {
+        queue: queue_name.clone(),
+        passive: false,
+        durable: true,
+        exclusive: false,
+        auto_delete: false,
+        no_wait: false,
+    })?;
+
+    chan.bind_queue(easyamqp::BindQueueConfig {
+        queue: queue_name.clone(),
+        exchange: "stats".to_owned(),
+        routing_key: None,
+        no_wait: false,
+    })?;
+
+    let handle = chan.consume(
+        collector,
+        easyamqp::ConsumeConfig {
             queue: "stats-events".to_owned(),
-            passive: false,
-            durable: true,
+            consumer_tag: format!("{}-prometheus-stats-collector", cfg.whoami()),
+            no_local: false,
+            no_ack: false,
+            no_wait: false,
             exclusive: false,
-            auto_delete: false,
-            no_wait: false,
-        })
-        .unwrap();
-
-    channel
-        .bind_queue(easyamqp::BindQueueConfig {
-            queue: "stats-events".to_owned(),
-            exchange: "stats".to_owned(),
-            routing_key: None,
-            no_wait: false,
-        })
-        .unwrap();
-
-    channel.basic_prefetch(1).unwrap();
-    let mut channel = channel
-        .consume(
-            worker::new(collector),
-            easyamqp::ConsumeConfig {
-                queue: "stats-events".to_owned(),
-                consumer_tag: format!("{}-prometheus-stats-collector", cfg.whoami()),
-                no_local: false,
-                no_ack: false,
-                no_wait: false,
-                exclusive: false,
-            },
-        )
-        .unwrap();
+        },
+    )?;
 
     thread::spawn(|| {
         let addr = "0.0.0.0:9898";
         info!("listening addr {:?}", addr);
-        Server::http(addr)
-            .unwrap()
-            .handle(move |_: Request, res: Response| {
-                res.send(metrics.prometheus_output().as_bytes()).unwrap();
-            })
-            .unwrap();
+        Server::http(addr)?.handle(move |_: Request, res: Response| {
+            res.send(metrics.prometheus_output().as_bytes()).unwrap();
+        })?;
+        Ok::<_, Box<dyn Error + Sync + Send + '_>>(())
     });
 
-    channel.start_consuming();
+    info!("Fetching jobs from {}", &queue_name);
+    task::block_on(handle);
 
-    info!("Finished consuming?");
-
-    channel.close(200, "Bye").unwrap();
-    info!("Closed the channel");
-    session.close(200, "Good Bye");
+    drop(conn); // Close connection.
     info!("Closed the session... EOF");
+    Ok(())
 }