Updated SQS hello-world example (#512)

* SQS hello-world example was missing required message_group_id parameter for send_message call

* Updated SQS hello world example based on feedback

Co-authored-by: Russell Cohen <rcoh@amazon.com>

aws/sdk/examples/sqs/Cargo.toml

@@ -1,15 +1,12 @@
 [package]
-name = "sqs"
+name = "sqs-code-examples"
 version = "0.1.0"
-authors = ["Russell Cohen <rcoh@amazon.com>"]
+authors = ["Russell Cohen <rcoh@amazon.com>", "Doug Schwartz <dougsch@amazon.com>"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 sqs = { package = "aws-sdk-sqs", path = "../../build/aws-sdk/sqs" }
 tokio = { version = "1", features = ["full"] }
-tracing-subscriber = "0.2.18"
-
-[[bin]]
-name = "sqs-hello-world"
+tracing-subscriber = "0.2.18"

aws/sdk/examples/sqs/src/bin/sqs-hello-world.rs

@@ -5,6 +5,7 @@
 
 use std::process::exit;
 
+/// Sends a message to and receives the message from a queue.
 #[tokio::main]
 async fn main() -> Result<(), sqs::Error> {
     tracing_subscriber::fmt::init();
@@ -18,25 +19,31 @@ async fn main() -> Result<(), sqs::Error> {
             exit(1);
         }
     };
-    println!("sending a receiving on `{}`", queue_url);
+
+    println!(
+        "Sending and receiving messages on with URL: `{}`",
+        queue_url
+    );
 
     let rsp = client
         .send_message()
         .queue_url(&queue_url)
         .message_body("hello from my queue")
+        .message_group_id("MyGroup")
         .send()
         .await?;
-    println!("sent a message: {:#?}", rsp);
+
+    println!("Response from sending a message: {:#?}", rsp);
 
     let rcv_message_output = client
         .receive_message()
-        // TODO: this should not be required, https://github.com/awslabs/smithy-rs/issues/439
-        .max_number_of_messages(1)
         .queue_url(&queue_url)
         .send()
         .await?;
+
     for message in rcv_message_output.messages.unwrap_or_default() {
-        println!("got a message: {:#?}", message);
+        println!("Got the message: {:#?}", message);
     }
+
     Ok(())
 }