Added getters in FluvioError and made example js use it (#34)

Makefile

@@ -12,8 +12,8 @@ build-dev:
 test: install-wasm-pack
 	wasm-pack test --firefox --headless
 
-fluvio-websocket-proxy:
-	cargo run -- ./fluvio-websocket-proxy/Cargo.toml
+run-fluvio-websocket-proxy:
+	cargo run --manifest-path ./fluvio-websocket-proxy/Cargo.toml
 
 webpack-dev:
 	npm install

README.md

@@ -12,7 +12,7 @@ This project is currently setup to be used via rollup.
 Setup fluvio with a `--local` cluster installation locally then run the
 following:
 
-* `make fluvio-websocket-proxy`
+* `make run-fluvio-websocket-proxy`
 
 ### Hot Reloading
 To use hotreloading for the contents of

js/index.js

@@ -1,22 +1,53 @@
 import("../pkg").then(async fluvioWasm => {
   var Fluvio = fluvioWasm.Fluvio;
   var Offset = fluvioWasm.Offset;
-  const fluvio = await Fluvio.connect("ws://localhost:3000")
-  const producer = await fluvio.topicProducer("foobar");
-  await producer.send("", `count`);
+  while (true) {
+    try {
+      const fluvio = await Fluvio.connect("ws://localhost:3000")
+      const producer = await fluvio.topicProducer("foobar");
+      await producer.send("", `count`);
 
-  const consumer = await fluvio.partitionConsumer("foobar", 0);
-  let stream = await consumer.stream(Offset.fromEnd(10))
+      const consumer = await fluvio.partitionConsumer("foobar", 0);
+      let stream = await consumer.stream(Offset.fromEnd(1))
+      const userAgent = navigator.userAgent;
 
-  let count = 0;
-  let before = new Date();
-  while (count < 10) {
+      let count = 0;
+      let before = new Date();
+      while (count < 10000) {
 
-    await producer.send("", `count-${count}`);
-    let next = await stream.next();
-    console.log(`${next.keyString()} - ${next.valueString()}`);
-    count++;
+        try {
+          await producer.send("", `${count}-${userAgent}`);
+          let next = await stream.next();
+          let text = `${next.valueString()}`;
+          console.log(text);
+          document.body.innerHTML =
+            `<div>${text}</div>` +
+            document.body.innerHTML;
+          count++;
+        } catch (e) {
+          console.error(e);
+          console.error(e.message);
+          console.error(e.stack);
+          let text = `${e} - ${userAgent}`;
+          document.body.innerHTML =
+            `<div>${text}</div>` +
+            document.body.innerHTML;
+          break;
+        }
+        await sleep(50);
+      }
+      let after = new Date();
+      console.log(`The recieved ${count} in took ${after - before} ms`);
+    } catch (e) {
+      console.error(e);
+      console.error(e.message);
+      console.error(e.stack);
+      break;
+    }
+    await sleep(5000);
   }
-  let after = new Date();
-  console.log(`The recieved ${count} in took ${after - before} ms`);
 });
+
+const sleep = (milliseconds) => {
+  return new Promise(resolve => setTimeout(resolve, milliseconds))
+}

src/error.rs

@@ -7,6 +7,34 @@ pub struct FluvioError {
     inner: NativeFluvioError,
 }
 
+// This is to get the stack for `FluvioError`
+#[wasm_bindgen]
+extern "C" {
+    type Error;
+
+    #[wasm_bindgen(constructor)]
+    fn new() -> Error;
+
+    #[wasm_bindgen(structural, method, getter)]
+    fn stack(error: &Error) -> String;
+}
+#[wasm_bindgen]
+impl FluvioError {
+    #[wasm_bindgen(getter)]
+    pub fn message(&self) -> String {
+        format!("{:?}", self.inner)
+    }
+    #[wasm_bindgen(getter)]
+    pub fn name(&self) -> String {
+        format!("FluvioError")
+    }
+    #[wasm_bindgen(getter)]
+    pub fn stack(&self) -> String {
+        let e = Error::new();
+        e.stack()
+    }
+}
+
 impl From<NativeFluvioError> for FluvioError {
     fn from(inner: NativeFluvioError) -> Self {
         Self { inner }