From: Kai Moritz <kai@juplo.de>
Date: Thu, 20 Apr 2023 06:50:19 +0000 (+0200)
Subject: NEU
X-Git-Tag: kafkadata~11
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=5c338c58065988f7841c4ab9ee1b193e754da9b9;p=demos%2Fkafka%2Fchat

NEU
---

diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatMessageChannel.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatMessageChannel.java
index 69947a9d..7b19bb6b 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatMessageChannel.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatMessageChannel.java
@@ -17,15 +17,13 @@ import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
 import java.time.*;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
+import java.util.concurrent.Callable;
 import java.util.stream.IntStream;
 
 
 @Slf4j
-public class ChatMessageChannel implements Runnable, ConsumerRebalanceListener
+public class ChatMessageChannel implements Callable<Optional<Exception>>, ConsumerRebalanceListener
 {
   private final String topic;
   private final Producer<String, MessageTo> producer;
@@ -155,7 +153,7 @@ public class ChatMessageChannel implements Runnable, ConsumerRebalanceListener
   }
 
   @Override
-  public void run()
+  public Optional<Exception> call()
   {
     consumer.subscribe(List.of(topic));
 
@@ -193,7 +191,15 @@ public class ChatMessageChannel implements Runnable, ConsumerRebalanceListener
         log.info("Received WakeupException, exiting!");
         running = false;
       }
+      catch (Exception e)
+      {
+        log.error("Exiting abnormally!");
+        return Optional.of(e);
+      }
     }
+
+    log.info("Exiting normally");
+    return Optional.empty();
   }
 
   void loadMessages(ConsumerRecords<String, MessageTo> records)
diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatRoomChannel.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatRoomChannel.java
index f9568e70..9ea23b13 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatRoomChannel.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatRoomChannel.java
@@ -9,18 +9,19 @@ import org.apache.kafka.clients.consumer.ConsumerRecords;
 import org.apache.kafka.clients.producer.Producer;
 import org.apache.kafka.clients.producer.ProducerRecord;
 import org.apache.kafka.common.TopicPartition;
-import org.apache.kafka.common.errors.RecordDeserializationException;
 import org.apache.kafka.common.errors.WakeupException;
 import reactor.core.publisher.Mono;
 
 import java.time.*;
 import java.util.List;
+import java.util.Optional;
 import java.util.UUID;
+import java.util.concurrent.Callable;
 
 
 @RequiredArgsConstructor
 @Slf4j
-public class ChatRoomChannel implements Runnable
+public class ChatRoomChannel implements Callable<Optional<Exception>>
 {
   private final String topic;
   private final Producer<Integer, ChatRoomTo> producer;
@@ -69,7 +70,7 @@ public class ChatRoomChannel implements Runnable
   }
 
   @Override
-  public void run()
+  public Optional<Exception> call()
   {
     consumer.assign(List.of(new TopicPartition(topic, 0)));
 
@@ -92,9 +93,18 @@ public class ChatRoomChannel implements Runnable
         log.info("Received WakeupException, exiting!");
         running = false;
       }
+      catch (Exception e)
+      {
+        log.error("Exiting abnormally!");
+        return Optional.of(e);
+      }
     }
+
+    log.info("Exiting normally");
+    return Optional.empty();
   }
 
+
   void createChatRoom(ChatRoomInfo chatRoomInfo)
   {
     UUID id = chatRoomInfo.getId();
diff --git a/src/test/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaServicesConfiguration.java b/src/test/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaServicesConfiguration.java
index 55aa6f84..3148c6f0 100644
--- a/src/test/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaServicesConfiguration.java
+++ b/src/test/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaServicesConfiguration.java
@@ -9,15 +9,23 @@ import de.juplo.kafka.chat.backend.domain.SimpleChatHome;
 import de.juplo.kafka.chat.backend.persistence.KafkaLikeShardingStrategy;
 import de.juplo.kafka.chat.backend.persistence.inmemory.InMemoryChatHomeService;
 import de.juplo.kafka.chat.backend.persistence.inmemory.InMemoryChatRoomFactory;
+import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.Consumer;
 import org.apache.kafka.clients.producer.Producer;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.ApplicationArguments;
 import org.springframework.boot.ApplicationRunner;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+import org.springframework.util.concurrent.ListenableFuture;
 
 import java.time.Clock;
 import java.time.ZoneId;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
 
 
 @ConditionalOnProperty(
@@ -25,8 +33,50 @@ import java.time.ZoneId;
     name = "services",
     havingValue = "kafka")
 @Configuration
+@Slf4j
 public class KafkaServicesConfiguration implements ApplicationRunner
 {
+  @Autowired
+  ThreadPoolTaskExecutor taskExecutor;
+  @Autowired
+  ConfigurableApplicationContext context;
+
+  @Autowired
+  ChatMessageChannel chatMessageChannel;
+
+  CompletableFuture<Optional<Exception>> chatRoomChannelConsumerJob;
+  CompletableFuture<Optional<Exception>> chatMessageChannelConsumerJob;
+
+
+  @Override
+  public void run(ApplicationArguments args) throws Exception
+  {
+    log.info("Starting the consumer for the ChatRoomChannel");
+    chatRoomChannelConsumerJob = taskExecutor.submitCompletable(chatMessageChannel);
+    chatRoomChannelConsumerJob.thenAccept(exceptionOptional ->
+    {
+      exceptionOptional.ifPresent();
+          log.info("SimpleConsumer exited normally, exit-status: {}", exitStatus);
+          SpringApplication.exit(context, () -> exitStatus);
+        },
+        t ->
+        {
+          log.error("SimpleConsumer exited abnormally!", t);
+          SpringApplication.exit(context, () -> 2);
+        });
+  }
+
+  @PreDestroy
+  public void shutdown() throws ExecutionException, InterruptedException
+  {
+    log.info("Signaling SimpleConsumer to quit its work");
+    kafkaConsumer.wakeup();
+    log.info("Waiting for SimpleConsumer to finish its work");
+    consumerJob.get();
+    log.info("SimpleConsumer finished its work");
+  }
+
+
   @Bean
   ChatHome kafkaChatHome(
       ShardingStrategy shardingStrategy,