shink commented on code in PR #16003:
URL: https://github.com/apache/pulsar/pull/16003#discussion_r894377745
##########
pulsar-io/mongo/src/main/java/org/apache/pulsar/io/mongodb/MongoSource.java:
##########
@@ -79,38 +78,46 @@ public MongoSource(Supplier<MongoClient> clientProvider) {
public void open(Map<String, Object> config, SourceContext sourceContext)
throws Exception {
log.info("Open MongoDB Source");
- mongoConfig = MongoConfig.load(config);
- mongoConfig.validate(false, false);
+ mongoSourceConfig = MongoSourceConfig.load(config);
+ mongoSourceConfig.validate();
if (clientProvider != null) {
mongoClient = clientProvider.get();
} else {
- mongoClient = MongoClients.create(mongoConfig.getMongoUri());
+ mongoClient = MongoClients.create(mongoSourceConfig.getMongoUri());
}
- if (StringUtils.isEmpty(mongoConfig.getDatabase())) {
+ if (StringUtils.isEmpty(mongoSourceConfig.getDatabase())) {
// Watch all databases
log.info("Watch all");
stream = mongoClient.watch();
} else {
- final MongoDatabase db =
mongoClient.getDatabase(mongoConfig.getDatabase());
+ final MongoDatabase db =
mongoClient.getDatabase(mongoSourceConfig.getDatabase());
- if (StringUtils.isEmpty(mongoConfig.getCollection())) {
+ if (StringUtils.isEmpty(mongoSourceConfig.getCollection())) {
// Watch all collections in a database
log.info("Watch db: {}", db.getName());
stream = db.watch();
} else {
// Watch a collection
-
- final MongoCollection<Document> collection =
db.getCollection(mongoConfig.getCollection());
- log.info("Watch collection: {} {}", db.getName(),
mongoConfig.getCollection());
+ final MongoCollection<Document> collection =
db.getCollection(mongoSourceConfig.getCollection());
+ log.info("Watch collection: {}.{}", db.getName(),
mongoSourceConfig.getCollection());
stream = collection.watch();
}
}
-
stream.batchSize(mongoConfig.getBatchSize()).fullDocument(FullDocument.UPDATE_LOOKUP);
+ stream.batchSize(mongoSourceConfig.getBatchSize())
+ .fullDocument(FullDocument.UPDATE_LOOKUP);
+
+ if (SyncType.FULL_SYNC.equals(mongoSourceConfig.getSyncType())) {
+ // sync currently existing messages
+ // startAtOperationTime is the starting point for the change stream
+ // setting startAtOperationTime to 0 means the start point is the
earliest
+ // see
https://www.mongodb.com/docs/v4.2/reference/method/db.collection.watch/ for
more information
+ stream.startAtOperationTime(new BsonTimestamp(0L));
+ }
Review Comment:
Here is the key.
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