codope commented on code in PR #11951:
URL: https://github.com/apache/hudi/pull/11951#discussion_r1769484635
##########
hudi-spark-datasource/hudi-spark-common/src/main/java/org/apache/hudi/HoodieSparkIndexClient.java:
##########
@@ -56,24 +56,24 @@
import static
org.apache.hudi.metadata.HoodieTableMetadataUtil.PARTITION_NAME_SECONDARY_INDEX;
import static
org.apache.hudi.metadata.HoodieTableMetadataUtil.PARTITION_NAME_SECONDARY_INDEX_PREFIX;
-public class HoodieSparkFunctionalIndexClient extends
BaseHoodieFunctionalIndexClient {
+public class HoodieSparkIndexClient extends BaseHoodieIndexClient {
- private static final Logger LOG =
LoggerFactory.getLogger(HoodieSparkFunctionalIndexClient.class);
+ private static final Logger LOG =
LoggerFactory.getLogger(HoodieSparkIndexClient.class);
- private static volatile HoodieSparkFunctionalIndexClient _instance;
+ private static volatile HoodieSparkIndexClient _instance;
private final SparkSession sparkSession;
- private HoodieSparkFunctionalIndexClient(SparkSession sparkSession) {
+ private HoodieSparkIndexClient(SparkSession sparkSession) {
super();
this.sparkSession = sparkSession;
}
- public static HoodieSparkFunctionalIndexClient getInstance(SparkSession
sparkSession) {
+ public static HoodieSparkIndexClient getInstance(SparkSession sparkSession) {
if (_instance == null) {
- synchronized (HoodieSparkFunctionalIndexClient.class) {
+ synchronized (HoodieSparkIndexClient.class) {
if (_instance == null) {
- _instance = new HoodieSparkFunctionalIndexClient(sparkSession);
+ _instance = new HoodieSparkIndexClient(sparkSession);
Review Comment:
This is the usual double-checked locking pattern. Probably you are concerned
about memory visibility issues. The `_instance` could be non-null and yet not
fully constructed when the first `if (_instance == null)` check passes, but
before the object is fully initialized. However, note that `_instance` is
declared as `volatile` which ensures that any writes to `_instance` are visible
to all threads immediately and prevents the reordering of instructions during
construction.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
