Change return type of greet handlers Rust templates (#215)

Author: gvdongen

templates/rust-shuttle/src/main.rs

@@ -9,13 +9,13 @@ use std::time::Duration;
 
 #[restate_sdk::service]
 trait Greeter {
-    async fn greet(name: String) -> HandlerResult<String>;
+    async fn greet(name: String) -> Result<String, HandlerError>;
 }
 
 struct GreeterImpl;
 
 impl Greeter for GreeterImpl {
-    async fn greet(&self, mut ctx: Context<'_>, name: String) -> HandlerResult<String> {
+    async fn greet(&self, mut ctx: Context<'_>, name: String) -> Result<String, HandlerError> {
         // Durably execute a set of steps; resilient against failures
         let greeting_id = ctx.rand_uuid().to_string();
         ctx.run(|| send_notification(&greeting_id, &name)).await?;

templates/rust/src/main.rs

@@ -6,13 +6,13 @@ use utils::{send_notification, send_reminder};
 
 #[restate_sdk::service]
 trait Greeter {
-    async fn greet(name: String) -> HandlerResult<String>;
+    async fn greet(name: String) -> Result<String, HandlerError>;
 }
 
 struct GreeterImpl;
 
 impl Greeter for GreeterImpl {
-    async fn greet(&self, mut ctx: Context<'_>, name: String) -> HandlerResult<String> {
+    async fn greet(&self, mut ctx: Context<'_>, name: String) -> Result<String, HandlerError> {
         // Durably execute a set of steps; resilient against failures
         let greeting_id = ctx.rand_uuid().to_string();
         ctx.run(|| send_notification(&greeting_id, &name)).await?;