kafka setup

server/.env

@@ -0,0 +1,2 @@
+KAFKA_HOST=localhost
+KAFKA_PORT=9092

server/docker-compose.yml

@@ -0,0 +1,22 @@
+version: "3"
+services:
+  zookeeper:
+    container_name: pong_server_zookeeper
+    image: 'bitnami/zookeeper:latest'
+    ports:
+      - '2181:2181'
+    environment:
+      - ALLOW_ANONYMOUS_LOGIN=yes
+  kafka:
+    container_name: pong_server_kafka
+    image: 'bitnami/kafka:latest'
+    ports:
+      - '9092:9092'
+    environment:
+      - KAFKA_BROKER_ID=1
+      - KAFKA_CFG_LISTENERS=PLAINTEXT://:9092
+      - KAFKA_CFG_ADVERTISED_LISTENERS=PLAINTEXT://127.0.0.1:9092
+      - KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper:2181
+      - ALLOW_PLAINTEXT_LISTENER=yes
+    depends_on:
+      - zookeeper

server/run.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+source .env
+
+docker-compose down
+docker-compose up -d --build --force-recreate
+docker exec pong_server_kafka /opt/bitnami/kafka/bin/kafka-topics.sh --create --topic topic --bootstrap-server "$KAFKA_HOST:$KAFKA_PORT"

server/src/kafka.rs

@@ -22,11 +22,11 @@ impl KafkaEventWriterImpl {
     }
 }
 impl EventWriterImpl for KafkaEventWriterImpl {
-    fn write(&mut self, event: Event) -> Result<(), ()> {
+    fn write(&mut self, event: Event) -> Result<(), String> {
         let record = Record::from_key_value(event.topic.as_str(), event.key.as_str(), event.msg.as_str());
         match self.producer.send(&record) {
             Ok(()) => Ok(()),
-            Err(_) => Err(())
+            Err(e) => Err(format!("{}", e))
         }
     }
 }