queuing things

Cargo.lock

@@ -36,6 +36,7 @@ dependencies = [
 name = "amqp_core"
 version = "0.1.0"
 dependencies = [
+ "amqp_datastructure",
  "bytes",
  "parking_lot",
  "rand",
@@ -62,11 +63,16 @@ dependencies = [
  "zip",
 ]
 
+[[package]]
+name = "amqp_datastructure"
+version = "0.1.0"
+
 [[package]]
 name = "amqp_messaging"
 version = "0.1.0"
 dependencies = [
  "amqp_core",
+ "amqp_datastructure",
  "parking_lot",
  "tokio",
  "tracing",

Cargo.toml

@@ -1,5 +1,13 @@
 [workspace]
-members = [".", "amqp_core", "amqp_dashboard", "amqp_messaging", "amqp_transport","xtask"]
+members = [
+    ".",
+    "amqp_core",
+    "amqp_dashboard",
+    "amqp_datastructure",
+    "amqp_messaging",
+    "amqp_transport",
+    "xtask",
+]
 
 [package]
 name = "amqp"

amqp_core/Cargo.toml

@@ -6,6 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+amqp_datastructure = { path = "../amqp_datastructure" }
 bytes = "1.1.0"
 parking_lot = "0.12.0"
 rand = "0.8.5"

amqp_core/src/queue.rs

@@ -47,7 +47,7 @@ impl Display for QueueName {
 pub struct QueueInner {
     pub id: QueueId,
     pub name: QueueName,
-    pub messages: Mutex<Vec<Message>>, // use a concurrent linked list???
+    pub messages: amqp_datastructure::MessageQueue<Message>,
     pub durable: bool,
     pub exclusive: Option<ChannelId>,
     /// Whether the queue will automatically be deleted when no consumers uses it anymore.

amqp_dashboard/frontend/src/components/data-page.tsx

@@ -46,11 +46,12 @@ const DataPage: FC<Props> = ({ prefix }) => {
         <h2>Queues</h2>
         {data ? (
           <Table
-            headers={['Queue ID', 'Name', 'Durable']}
+            headers={['Queue ID', 'Name', 'Durable', 'Message Count']}
             rows={data.queues.map((queue) => [
               queue.id,
               queue.name,
               queue.durable ? 'Yes' : 'No',
+              queue.messages,
             ])}
           />
         ) : (

amqp_dashboard/frontend/src/types.ts

@@ -13,6 +13,7 @@ export type Queue = {
   id: string;
   name: string;
   durable: boolean;
+  messages: number;
 };
 
 export type Data = {

amqp_dashboard/src/lib.rs

@@ -76,6 +76,7 @@ struct Queue {
     id: String,
     name: String,
     durable: bool,
+    messages: usize,
 }
 
 async fn get_data(global_data: GlobalData) -> impl IntoResponse {
@@ -106,6 +107,7 @@ async fn get_data(global_data: GlobalData) -> impl IntoResponse {
             id: queue.id.to_string(),
             name: queue.name.to_string(),
             durable: queue.durable,
+            messages: queue.messages.len(),
         })
         .collect();
 

amqp_datastructure/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "amqp_datastructure"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

amqp_datastructure/src/lib.rs

@@ -0,0 +1,3 @@
+mod message_queue;
+
+pub use message_queue::MessageQueue;

amqp_datastructure/src/message_queue.rs

@@ -0,0 +1,57 @@
+// using std::sync::Mutex because it's only temporary anyways
+use std::{
+    collections::VecDeque,
+    fmt::{Debug, Formatter},
+    sync::Mutex,
+};
+
+/// The data structure behind the message queue.
+///
+/// Needs to support:
+/// * concurrent access
+/// * priority
+///
+/// Currently supports
+/// * mutex lol
+// todo: see above
+pub struct MessageQueue<T> {
+    deque: Mutex<VecDeque<T>>,
+}
+
+impl<T> MessageQueue<T> {
+    pub fn new() -> Self {
+        Self {
+            deque: Mutex::default(),
+        }
+    }
+
+    pub fn append(&self, message: T) {
+        let mut lock = self.deque.lock().unwrap();
+        lock.push_back(message);
+    }
+
+    pub fn try_get(&self) -> Option<T> {
+        let mut lock = self.deque.lock().unwrap();
+        lock.pop_front()
+    }
+
+    pub fn len(&self) -> usize {
+        self.deque.lock().unwrap().len()
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+}
+
+impl<T> Default for MessageQueue<T> {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl<T: Debug> Debug for MessageQueue<T> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("MessageQueue").finish_non_exhaustive()
+    }
+}

amqp_messaging/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 
 [dependencies]
 amqp_core = { path = "../amqp_core" }
+amqp_datastructure = { path = "../amqp_datastructure" }
 parking_lot = "0.12.0"
 tracing = "0.1.31"
 tokio = { version = "1.17.0", features = ["full"] }

amqp_messaging/src/methods/mod.rs

@@ -4,13 +4,10 @@ mod queue;
 
 use crate::Result;
 use amqp_core::{amqp_todo, connection::Channel, message::Message, methods::Method};
-use tracing::{error, info};
+use tracing::info;
 
-pub fn handle_basic_publish(channel_handle: Channel, message: Message) {
-    match publish::publish(channel_handle, message) {
-        Ok(()) => {}
-        Err(err) => error!(%err, "publish error occurred"),
-    }
+pub fn handle_basic_publish(channel_handle: Channel, message: Message) -> Result<()> {
+    publish::publish(channel_handle, message)
 }
 
 pub async fn handle_method(channel_handle: Channel, method: Method) -> Result<Method> {

amqp_messaging/src/methods/queue.rs

@@ -42,7 +42,7 @@ pub fn declare(channel: Channel, queue_declare: QueueDeclare) -> Result<Method>
     let queue = Arc::new(QueueInner {
         id,
         name: queue_name.clone(),
-        messages: Mutex::default(),
+        messages: amqp_datastructure::MessageQueue::new(),
         durable,
         exclusive: exclusive.then(|| channel.id),
         deletion: if auto_delete {

amqp_messaging/src/queue_worker.rs

@@ -94,7 +94,9 @@ impl QueueTask {
     }
 
     #[tracing::instrument(skip(self), fields(name = self.show_name()), level = "trace")]
-    async fn queue_message(&mut self, _message: Message) {}
+    async fn queue_message(&mut self, message: Message) {
+        self.queue.messages.append(message);
+    }
 
     async fn cleanup(&mut self) {
         // do stuff or something like that id whatever

amqp_transport/src/connection.rs

@@ -498,7 +498,7 @@ impl TransportConnection {
 
             let channel = self.channels.get(&channel).ok_or(ConException::Todo)?;
 
-            amqp_messaging::methods::handle_basic_publish(channel.global_chan.clone(), message);
+            amqp_messaging::methods::handle_basic_publish(channel.global_chan.clone(), message)?;
             Ok(())
         } else {
             Err(ConException::Todo.into())

test-js/src/send-single-message.js

@@ -3,7 +3,9 @@ import { connectAmqp } from './utils/utils.js';
 const connection = await connectAmqp();
 const channel = await connection.createChannel();
 
-channel.publish('exchange-1', 'queue-1', Buffer.from('hello'));
+await channel.assertQueue('send-queue-352');
+
+channel.publish('', 'send-queue-352', Buffer.from('hello'));
 
 console.log('Published message');