Add two Amazon Polly examples (#286)

* Add to Amazon Polly examples

* Fix copy-paste error

* Update aws/sdk/examples/polly-helloworld/src/main.rs

Co-authored-by: David Barsky <dbarsky@amazon.com>

* Update aws/sdk/examples/polly-helloworld/src/main.rs

Co-authored-by: David Barsky <dbarsky@amazon.com>

* Some cleanups

* Rerun precommit

* CR Feedback

* Fix clippy lint

* Small cleanup

Co-authored-by: David Barsky <dbarsky@amazon.com>

aws/sdk/examples/polly-generate-speech/.gitignore

@@ -0,0 +1 @@
+audio.mp3

aws/sdk/examples/polly-generate-speech/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "polly-generate-speech"
+version = "0.1.0"
+authors = ["Russell Cohen <rcoh@amazon.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+polly = { path = "../../build/aws-sdk/polly"}
+tokio = { version = "1", features = ["full"] }

aws/sdk/examples/polly-generate-speech/src/main.rs

@@ -0,0 +1,25 @@
+use polly::model::{Engine, OutputFormat, VoiceId};
+use std::error::Error;
+use tokio::fs::File;
+use tokio::io::AsyncWriteExt;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
+    let client = polly::fluent::Client::from_env();
+    let resp = client
+        .synthesize_speech()
+        .voice_id(VoiceId::Emma)
+        .engine(Engine::Neural)
+        .output_format(OutputFormat::Mp3)
+        .text("Hello, I am polly!")
+        .send()
+        .await?;
+    let audio = resp.audio_stream.expect("data should be included");
+    let mut file = File::create("audio.mp3").await?;
+    file.write_all(audio.as_ref()).await?;
+    println!(
+        "Audio written to audio.mp3 ({} bytes)",
+        audio.as_ref().len()
+    );
+    Ok(())
+}

aws/sdk/examples/polly-helloworld/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "polly-helloworld"
+version = "0.1.0"
+authors = ["Russell Cohen <rcoh@amazon.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+polly = { path = "../../build/aws-sdk/polly"}
+tokio = { version = "1", features = ["full"] }

aws/sdk/examples/polly-helloworld/src/main.rs

@@ -0,0 +1,43 @@
+use polly::model::{Engine, Voice};
+use std::error::Error;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
+    let client = polly::fluent::Client::from_env();
+    let mut tok = None;
+    let mut voices: Vec<Voice> = vec![];
+    // Below is an an example of how pagination can be implemented manually.
+    loop {
+        let mut req = client.describe_voices();
+        if let Some(tok) = tok {
+            req = req.next_token(tok);
+        }
+        let resp = req.send().await?;
+        for voice in resp.voices.unwrap_or_default() {
+            println!(
+                "I can speak as: {} in {:?}",
+                voice.name.as_ref().unwrap(),
+                voice.language_name.as_ref().unwrap()
+            );
+            voices.push(voice);
+        }
+        tok = match resp.next_token {
+            Some(next) => Some(next),
+            None => break,
+        };
+    }
+    let neural_voices = voices
+        .iter()
+        .filter(|voice| {
+            voice
+                .supported_engines
+                .as_deref()
+                .unwrap_or_default()
+                .contains(&Engine::Neural)
+        })
+        .map(|voice| voice.id.as_ref().unwrap())
+        .collect::<Vec<_>>();
+
+    println!("Voices supporting a neural engine: {:?}", neural_voices);
+    Ok(())
+}

codegen/src/main/kotlin/software/amazon/smithy/rust/codegen/smithy/generators/CombinedErrorGenerator.kt

@@ -80,7 +80,7 @@ class CombinedErrorGenerator(
             rust(
                 """
                 /// An unexpected error, eg. invalid JSON returned by the service or an unknown error code
-                Unhandled(Box<dyn #T>),
+                Unhandled(Box<dyn #T + Send + Sync + 'static>),
             """,
                 RuntimeType.StdError
             )
@@ -125,7 +125,7 @@ class CombinedErrorGenerator(
                     Self { kind, meta }
                 }
 
-                pub fn unhandled(err: impl Into<Box<dyn #{std_error}>>) -> Self {
+                pub fn unhandled(err: impl Into<Box<dyn #{std_error} + Send + Sync + 'static>>) -> Self {
                     Self {
                         kind: ${symbol.name}Kind::Unhandled(err.into()),
                         meta: Default::default()

design/src/SUMMARY.md

@@ -3,4 +3,3 @@
 - [Http Operations](./operation.md)
 - [Endpoint Resolution](./endpoint.md)
 - [HTTP middleware](./middleware.md)
-