Make client field in Publish a reference

Co-Authored-By: Casper Beyer <[email protected]>

async-nats/src/client.rs

@@ -18,6 +18,7 @@ use super::{header::HeaderMap, status::StatusCode, Command, Error, Message, Subs
 use bytes::Bytes;
 use futures::future::TryFutureExt;
 use futures::stream::StreamExt;
+use futures::FutureExt;
 use lazy_static::lazy_static;
 use regex::Regex;
 use std::error;
@@ -38,60 +39,51 @@ lazy_static! {
 /// [`Client::publish_with_reply`] or [`Client::publish_with_reply_and_headers`] functions.
 pub struct PublishError(mpsc::error::SendError<Command>);
 
-pub struct Publish {
-    sender: mpsc::Sender<Command>,
+pub struct Publish<'a> {
+    client: &'a Client,
     subject: String,
     payload: Bytes,
     headers: Option<HeaderMap>,
     respond: Option<String>,
 }
 
-impl Publish {
-    pub fn new(sender: mpsc::Sender<Command>, subject: String, payload: Bytes) -> Publish {
+impl<'a> Publish<'a> {
+    pub fn new(client: &Client, subject: String, payload: Bytes) -> Publish {
         Publish {
-            sender,
+            client,
             subject,
             payload,
             headers: None,
             respond: None,
         }
     }
 
-    pub fn headers(mut self, headers: HeaderMap) -> Publish {
+    pub fn headers(mut self, headers: HeaderMap) -> Publish<'a> {
         self.headers = Some(headers);
         self
     }
 
-    pub fn reply(mut self, subject: String) -> Publish {
+    pub fn reply(mut self, subject: String) -> Publish<'a> {
         self.respond = Some(subject);
         self
     }
 }
 
-impl IntoFuture for Publish {
+impl<'a> IntoFuture for Publish<'a> {
     type Output = Result<(), PublishError>;
-    type IntoFuture = Pin<Box<dyn Future<Output = Result<(), PublishError>> + Send>>;
+    type IntoFuture = Pin<Box<dyn Future<Output = Result<(), PublishError>> + Send + 'a>>;
 
     fn into_future(self) -> Self::IntoFuture {
-        let sender = self.sender.clone();
-        let subject = self.subject;
-        let payload = self.payload;
-        let respond = self.respond;
-        let headers = self.headers;
-
-        Box::pin(async move {
-            sender
-                .send(Command::Publish {
-                    subject,
-                    payload,
-                    respond,
-                    headers,
-                })
-                .map_err(PublishError)
-                .await?;
-
-            Ok(())
-        })
+        self.client
+            .sender
+            .send(Command::Publish {
+                subject: self.subject,
+                payload: self.payload,
+                respond: self.respond,
+                headers: self.headers,
+            })
+            .map_err(PublishError)
+            .boxed()
     }
 }
 
@@ -213,7 +205,7 @@ impl Client {
     /// # }
     /// ```
     pub fn publish(&self, subject: String, payload: Bytes) -> Publish {
-        Publish::new(self.sender.clone(), subject, payload)
+        Publish::new(self, subject, payload)
     }
 
     /// Publish a [Message] with headers to a given subject.