dimas-b commented on code in PR #1378:
URL: https://github.com/apache/polaris/pull/1378#discussion_r2051185713
##########
service/common/src/main/java/org/apache/polaris/service/catalog/iceberg/IcebergCatalog.java:
##########
@@ -1184,16 +1200,55 @@ public ViewBuilder withLocation(String newLocation) {
}
}
- private class BasePolarisTableOperations extends
BaseMetastoreTableOperations {
+ public class BasePolarisTableOperations extends BaseMetastoreTableOperations
{
private final TableIdentifier tableIdentifier;
private final String fullTableName;
+ private final boolean updateMetadataOnCommit;
private FileIO tableFileIO;
- BasePolarisTableOperations(FileIO defaultFileIO, TableIdentifier
tableIdentifier) {
+ // TODO remove the following if the Iceberg library allows us to do this
without reflection
+ // For more details see:
+ // https://github.com/apache/polaris/pull/1378
+ private static final Unsafe unsafe;
+ private static final Field tableMetadataField;
+ private static final long changesFieldOffset;
+ private static final Field currentMetadataLocationField;
+ private static final Field currentMetadataField;
+
+ static {
+ try {
+ tableMetadataField =
TableMetadata.class.getDeclaredField("metadataFileLocation");
+ tableMetadataField.setAccessible(true);
+
+ Field unsafeField = Unsafe.class.getDeclaredField("theUnsafe");
+ unsafeField.setAccessible(true);
+ unsafe = (Unsafe) unsafeField.get(null);
+ Field changesField = TableMetadata.class.getDeclaredField("changes");
+ changesField.setAccessible(true);
+ changesFieldOffset = unsafe.objectFieldOffset(changesField);
+
+ currentMetadataLocationField =
+
BaseMetastoreTableOperations.class.getDeclaredField("currentMetadataLocation");
+ currentMetadataLocationField.setAccessible(true);
+
+ currentMetadataField =
+
BaseMetastoreTableOperations.class.getDeclaredField("currentMetadata");
+ currentMetadataField.setAccessible(true);
+ } catch (IllegalAccessException | NoSuchFieldException e) {
+ LOGGER.error(
+ "Encountered an unexpected error while attempting to access
private fields in TableMetadata",
Review Comment:
If we want to hide reflection behind the same feature flag, we should put it
in a separate utility class with a static `getInstance()` method. This way, the
static code in the utility class will not get triggered until it is used. At
the same time we'll keep the benefit of one time static init.
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