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dakotahNorth / solace-spring-boot-starter

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Sweep: Add List to Map to support multiple message handlers with the same event #8

Closed dakotahNorth closed 6 months ago

dakotahNorth commented 6 months ago

Details

Add a List to the Map so that multiple events with the same string name will be called in SolaceMessageListener.

To handle multiple strings with the same value in the messageTypeHandlers map, you can modify the map to store a list of consumers (Consumer) for each message type. This way, you can support multiple handlers for the same message type. Here's how you can adjust the declaration and usage of messageTypeHandlers

When adding a handler to the map, check if there's already a list for the given message type. If so, add to it; otherwise, create a new list.

And when invoking handlers, iterate over the list of consumers for the given message type.

This modification allows your SolaceMessageListener to support multiple handlers for the same message type, enabling more flexible message processing.

Add add two message handlers in the TestMessageHandler that rely on the same event and create a test to receive 1 events from two message handlers which are added to the same receivedEvents, and therefore validate that the number of tests receveid is 2.

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Checklist - [X] Modify `src/main/java/com/example/solace/springboot/starter/messaging/SolaceMessageListener.java` ✓ https://github.com/dakotahNorth/solace-spring-boot-starter/commit/68c92330aecef48beeb0d5ac29ec87edc6369396 [Edit](https://github.com/dakotahNorth/solace-spring-boot-starter/edit/sweep/add_list_to_map_to_support_multiple_mess/src/main/java/com/example/solace/springboot/starter/messaging/SolaceMessageListener.java) - [X] Running GitHub Actions for `src/main/java/com/example/solace/springboot/starter/messaging/SolaceMessageListener.java` ✓ [Edit](https://github.com/dakotahNorth/solace-spring-boot-starter/edit/sweep/add_list_to_map_to_support_multiple_mess/src/main/java/com/example/solace/springboot/starter/messaging/SolaceMessageListener.java) - [X] Modify `src/it/java/com/example/solace/springboot/starter/messaging/SolaceMessageListenerIT.java` ✓ https://github.com/dakotahNorth/solace-spring-boot-starter/commit/0b75215c97fbaf19f1b5dd74332ba61b6636f59f [Edit](https://github.com/dakotahNorth/solace-spring-boot-starter/edit/sweep/add_list_to_map_to_support_multiple_mess/src/it/java/com/example/solace/springboot/starter/messaging/SolaceMessageListenerIT.java) - [X] Running GitHub Actions for `src/it/java/com/example/solace/springboot/starter/messaging/SolaceMessageListenerIT.java` ✓ [Edit](https://github.com/dakotahNorth/solace-spring-boot-starter/edit/sweep/add_list_to_map_to_support_multiple_mess/src/it/java/com/example/solace/springboot/starter/messaging/SolaceMessageListenerIT.java)
sweep-ai[bot] commented 6 months ago

🚀 Here's the PR! #9

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Step 1: 🔎 Searching

I found the following snippets in your repository. I will now analyze these snippets and come up with a plan.

Some code snippets I think are relevant in decreasing order of relevance (click to expand). If some file is missing from here, you can mention the path in the ticket description. https://github.com/dakotahNorth/solace-spring-boot-starter/blob/d5e6448a44cc9385765805f34a4b4e4572a9693a/src/main/java/com/example/solace/springboot/starter/messaging/SolaceMessageListener.java#L18-L148 https://github.com/dakotahNorth/solace-spring-boot-starter/blob/d5e6448a44cc9385765805f34a4b4e4572a9693a/src/it/java/com/example/solace/springboot/starter/messaging/SolaceMessageListenerIT.java#L1-L26

Step 2: ⌨️ Coding

--- 
+++ 
@@ -29,7 +29,7 @@

     private volatile boolean isRunning = false;
     private JCSMPSession session;
-    private final Map> messageTypeHandlers = new HashMap<>(32);
+    private final Map>> messageTypeHandlers = new HashMap<>(32);

     @Autowired
     private ApplicationContext applicationContext;
@@ -49,7 +49,7 @@
                 if (messageType.isEmpty()) {
                     messageType = eventClass.getSimpleName();
                 }
-                messageTypeHandlers.put(messageType, createHandler(method, eventClass, bean));
+                messageTypeHandlers.computeIfAbsent(messageType, k -> new ArrayList<>()).add(createHandler(method, eventClass, bean));
             }
         }
     }
@@ -112,9 +112,9 @@
         try {
             JSONObject rootNode = JSON.parseObject(messagePayload);
             String messageType = rootNode.getString("messageType");
-            Consumer handler = messageTypeHandlers.get(messageType);
-            if (handler != null) {
-                handler.accept(rootNode);
+            List> handlers = messageTypeHandlers.get(messageType);
+            if (handlers != null && !handlers.isEmpty()) {
+                handlers.forEach(handler -> handler.accept(rootNode));
             } else {
                 System.out.println("Unhandled messageType: " + messageType);
             }

Ran GitHub Actions for 68c92330aecef48beeb0d5ac29ec87edc6369396:

--- 
+++ 
@@ -15,11 +15,29 @@

+    private static final List receivedEvents = new ArrayList<>();
+
     @MessageHandler(messageType = "ExampleEvent")
     public final void handleExampleEvent(ExampleEvent event) {
+        receivedEvents.add(event);
+        System.out.println("Received event: " + event);
+    }

-        System.out.println("Received event: " + event);
+    @MessageHandler(messageType = "ExampleEvent")
+    public final void handleAdditionalExampleEvent(ExampleEvent event) {
+        receivedEvents.add(event);
+        System.out.println("Additional handler received event: " + event);
+    }

+    @Test
+    public void testMultipleEventHandlers() {
+        // Simulate sending an ExampleEvent message
+        // This part will be pseudo-code as the actual implementation depends on the messaging setup
+        ExampleEvent event = new ExampleEvent();
+        solaceMessageListener.onMessageReceived(new JSONObject().put("messageType", "ExampleEvent").toString());
+
+        // Verify that both handlers received the event
+        assertEquals(2, receivedEvents.size());
     }

Ran GitHub Actions for 0b75215c97fbaf19f1b5dd74332ba61b6636f59f:

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dakotahNorth commented 6 months ago

Sweep did a really decent job with this.