[GitHub] [pulsar] Shoothzj commented on a diff in pull request #15939: [SpotBugs][pulsar-io] Enable spotbugs for pulsar-io-mongo

[GitBox <gi...@apache.org>]

Shoothzj commented on code in PR #15939:
URL: https://github.com/apache/pulsar/pull/15939#discussion_r889843297


##########
pulsar-io/mongo/src/main/java/org/apache/pulsar/io/mongodb/MongoSource.java:
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@@ -133,9 +134,12 @@ public void onNext(ChangeStreamDocument<Document> doc) {
                     recordValue.put("ns", doc.getNamespace());
                     recordValue.put("operation", doc.getOperationType());
 
-                    consume(new DocRecord(
-                            Optional.of(doc.getDocumentKey().toJson()),
-                            mapper.writeValueAsString(recordValue).getBytes(StandardCharsets.UTF_8)));
+                    BsonDocument key = doc.getDocumentKey();
+                    if (key != null) {
+                        consume(new DocRecord(
+                                Optional.of(key.toJson()),
+                                mapper.writeValueAsString(recordValue).getBytes(StandardCharsets.UTF_8)));
+                    }

Review Comment:
   @shink I think we don't need to throw exception. We also can
   ```java
   Optional.ofNullable(doc.getDocumentKey()).map(BsonDocument::toJson),
   ```



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