[ISSUE #5127] fix create topic error in Standalone mode

eventmesh-storage-plugin/eventmesh-storage-standalone/src/main/java/org/apache/eventmesh/storage/standalone/broker/Channel.java

@@ -31,6 +31,7 @@
 import com.lmax.disruptor.dsl.ProducerType;
 
 import lombok.Getter;
+import lombok.Setter;
 
 
 public class Channel implements LifeCycle {
@@ -39,11 +40,16 @@ public class Channel implements LifeCycle {
     @Getter
     private DisruptorProvider provider;
     private final Integer size;
-    private final EventHandler<MessageEntity> eventHandler;
+    @Setter
+    private EventHandler<MessageEntity> eventHandler;
     private volatile boolean started = false;
     private final TopicMetadata topic;
     private static final String THREAD_NAME_PREFIX = "standalone_disruptor_provider_";
 
+    public Channel(TopicMetadata topic) {
+        this(DEFAULT_SIZE, topic, null);
+    }
+
     public Channel(TopicMetadata topic, EventHandler<MessageEntity> eventHandler) {
         this(DEFAULT_SIZE, topic, eventHandler);
     }

eventmesh-storage-plugin/eventmesh-storage-standalone/src/main/java/org/apache/eventmesh/storage/standalone/broker/StandaloneBroker.java

@@ -60,25 +60,20 @@ public static StandaloneBroker getInstance() {
     public MessageEntity putMessage(String topicName, CloudEvent message) {
         TopicMetadata topicMetadata = new TopicMetadata(topicName);
         if (!messageContainer.containsKey(topicMetadata)) {
-            createTopic(topicName);
+            throw new RuntimeException(String.format("The topic:%s is not created", topicName));
         }
         Channel channel = messageContainer.get(topicMetadata);
+        if (channel.isClosed()) {
+            throw new RuntimeException(String.format("The topic:%s is not subscribed", topicName));
+        }
         MessageEntity messageEntity = new MessageEntity(new TopicMetadata(topicName), message);
         channel.getProvider().onData(messageEntity);
         return messageEntity;
     }
 
     public Channel createTopic(String topicName) {
         TopicMetadata topicMetadata = new TopicMetadata(topicName);
-        return messageContainer.computeIfAbsent(topicMetadata, k -> {
-            Subscribe subscribe = subscribeContainer.get(topicMetadata);
-            if (subscribe == null) {
-                throw new IllegalStateException("the topic not exist subscribe ");
-            }
-            Channel channel = new Channel(topicMetadata, subscribe);
-            channel.start();
-            return channel;
-        });
+        return messageContainer.computeIfAbsent(topicMetadata, k -> new Channel(topicMetadata));
     }
 
     /**
@@ -139,10 +134,17 @@ public void deleteTopicIfExist(String topicName) {
 
     public void subscribed(String topicName, Subscribe subscribe) {
         TopicMetadata topicMetadata = new TopicMetadata(topicName);
-        if (getMessageContainer().containsKey(topicMetadata)) {
-            log.warn("the topic already subscribed");
+        if (subscribeContainer.containsKey(topicMetadata)) {
+            log.warn("the topic:{} already subscribed", topicName);
+            return;
+        }
+        Channel channel = getMessageContainer().get(topicMetadata);
+        if (channel == null) {
+            log.warn("the topic:{} is not created", topicName);
             return;
         }
+        channel.setEventHandler(subscribe);
+        channel.start();
         subscribeContainer.put(topicMetadata, subscribe);
     }
 

eventmesh-storage-plugin/eventmesh-storage-standalone/src/test/java/org/apache/eventmesh/storage/standalone/TestUtils.java

@@ -93,11 +93,13 @@ public static MessageEntity createMessageEntity(TopicMetadata topicMetadata, Clo
     }
 
     public static Subscribe createSubscribe(StandaloneBroker standaloneBroker) {
+        standaloneBroker.createTopic(TEST_TOPIC);
         return new Subscribe(TEST_TOPIC, standaloneBroker, (cloudEvent, context) -> {
         });
     }
 
     public static Subscribe createSubscribe(StandaloneBroker standaloneBroker, List<CloudEvent> cloudEvents) {
+        standaloneBroker.createTopic(TEST_TOPIC);
         return new Subscribe(TEST_TOPIC, standaloneBroker, (cloudEvent, context) -> {
             cloudEvents.add(cloudEvent);
         });

eventmesh-storage-plugin/eventmesh-storage-standalone/src/test/java/org/apache/eventmesh/storage/standalone/producer/StandaloneProducerTest.java

@@ -18,10 +18,12 @@
 package org.apache.eventmesh.storage.standalone.producer;
 
 import static org.apache.eventmesh.storage.standalone.TestUtils.TEST_TOPIC;
+import static org.apache.eventmesh.storage.standalone.TestUtils.createSubscribe;
 
 import org.apache.eventmesh.api.SendResult;
 import org.apache.eventmesh.storage.standalone.TestUtils;
 import org.apache.eventmesh.storage.standalone.broker.StandaloneBroker;
+import org.apache.eventmesh.storage.standalone.broker.task.Subscribe;
 
 import java.util.Properties;
 
@@ -70,6 +72,8 @@ public void testPublish() {
         StandaloneBroker standaloneBroker = StandaloneBroker.getInstance();
         standaloneBroker.createTopicIfAbsent(TEST_TOPIC);
         CloudEvent cloudEvent = TestUtils.createDefaultCloudEvent();
+        Subscribe subscribe = createSubscribe(standaloneBroker);
+        subscribe.subscribe();
         SendResult sendResult = standaloneProducer.publish(cloudEvent);
         Assertions.assertNotNull(sendResult);
     }