Log the number of messages received from the SQS queue, including a count of the number of messages that will need to be processed. Also, include logging of deletes at the debug level. (opensearch-project#2011)

Signed-off-by: David Venable <dlv@amazon.com>

Author: dlvenable

data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/SqsWorker.java

@@ -69,7 +69,7 @@ public SqsWorker(final SqsClient sqsClient,
     @Override
     public void run() {
 
-        while(true) {
+        while (true) {
             int messagesProcessed = 0;
             try {
                 messagesProcessed = processSqsMessages();
@@ -152,26 +152,35 @@ private ParsedMessage convertS3EventMessages(final Message message) {
     }
 
     private List<DeleteMessageBatchRequestEntry> processS3EventNotificationRecords(final Collection<ParsedMessage> s3EventNotificationRecords) {
-        List<DeleteMessageBatchRequestEntry> deleteMessageBatchRequestEntryCollection = new ArrayList<>();
+        final List<DeleteMessageBatchRequestEntry> deleteMessageBatchRequestEntryCollection = new ArrayList<>();
+        final List<ParsedMessage> parsedMessagesToRead = new ArrayList<>();
+
         for (ParsedMessage parsedMessage : s3EventNotificationRecords) {
             if (parsedMessage.failedParsing) {
                 sqsMessagesFailedCounter.increment();
                 if (s3SourceConfig.getOnErrorOption().equals(OnErrorOption.DELETE_MESSAGES)) {
                     deleteMessageBatchRequestEntryCollection.add(buildDeleteMessageBatchRequestEntry(parsedMessage.message));
                 }
-            }
-            else {
+            } else {
                 final List<S3EventNotification.S3EventNotificationRecord> notificationRecords = parsedMessage.notificationRecords;
-                if(!notificationRecords.isEmpty() && isEventNameCreated(notificationRecords.get(0))) {
-                    final S3ObjectReference s3ObjectReference = populateS3Reference(notificationRecords.get(0));
-                    final Optional<DeleteMessageBatchRequestEntry> deleteMessageBatchRequestEntry = processS3Object(parsedMessage, s3ObjectReference);
-                    deleteMessageBatchRequestEntry.ifPresent(deleteMessageBatchRequestEntryCollection::add);
+                if (!notificationRecords.isEmpty() && isEventNameCreated(notificationRecords.get(0))) {
+                    parsedMessagesToRead.add(parsedMessage);
                 } else {
                     // Add SQS message to delete collection if the eventName is not ObjectCreated
                     deleteMessageBatchRequestEntryCollection.add(buildDeleteMessageBatchRequestEntry(parsedMessage.message));
                 }
             }
         }
+
+        LOG.info("Received {} messages from SQS. Read {} messages from S3.", s3EventNotificationRecords.size(), parsedMessagesToRead.size());
+
+        for (ParsedMessage parsedMessage : parsedMessagesToRead) {
+            final List<S3EventNotification.S3EventNotificationRecord> notificationRecords = parsedMessage.notificationRecords;
+            final S3ObjectReference s3ObjectReference = populateS3Reference(notificationRecords.get(0));
+            final Optional<DeleteMessageBatchRequestEntry> deleteMessageBatchRequestEntry = processS3Object(parsedMessage, s3ObjectReference);
+            deleteMessageBatchRequestEntry.ifPresent(deleteMessageBatchRequestEntryCollection::add);
+        }
+
         return deleteMessageBatchRequestEntryCollection;
     }
 
@@ -194,6 +203,7 @@ private Optional<DeleteMessageBatchRequestEntry> processS3Object(
     }
 
     private void deleteSqsMessages(final List<DeleteMessageBatchRequestEntry> deleteMessageBatchRequestEntryCollection) {
+        LOG.debug("Deleting {} messages from SQS.", deleteMessageBatchRequestEntryCollection.size());
         final DeleteMessageBatchRequest deleteMessageBatchRequest = buildDeleteMessageBatchRequest(deleteMessageBatchRequestEntryCollection);
         final DeleteMessageBatchResponse deleteMessageBatchResponse = sqsClient.deleteMessageBatch(deleteMessageBatchRequest);
         if (deleteMessageBatchResponse.hasSuccessful()) {
@@ -224,7 +234,7 @@ private boolean isEventNameCreated(final S3EventNotification.S3EventNotification
     private S3ObjectReference populateS3Reference(final S3EventNotification.S3EventNotificationRecord s3EventNotificationRecord) {
         final S3EventNotification.S3Entity s3Entity = s3EventNotificationRecord.getS3();
         return S3ObjectReference.bucketAndKey(s3Entity.getBucket().getName(),
-                s3Entity.getObject().getUrlDecodedKey())
+                        s3Entity.getObject().getUrlDecodedKey())
                 .build();
     }