igalshilman commented on a change in pull request #7562: [FLINK-11329][core]
Migrate CRowSerializerConfigSnapshot to new TypeSerializerSnapshot interface
URL: https://github.com/apache/flink/pull/7562#discussion_r250113361
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/types/CRowSerializer.scala
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@@ -80,41 +81,21 @@ class CRowSerializer(val rowSerializer:
TypeSerializer[Row]) extends TypeSeriali
// Serializer configuration snapshotting & compatibility
//
--------------------------------------------------------------------------------------------
- override def snapshotConfiguration(): TypeSerializerConfigSnapshot[CRow] = {
- new CRowSerializer.CRowSerializerConfigSnapshot(Array(rowSerializer))
- }
-
- override def ensureCompatibility(
- configSnapshot: TypeSerializerConfigSnapshot[_]):
CompatibilityResult[CRow] = {
-
- configSnapshot match {
- case crowSerializerConfigSnapshot:
CRowSerializer.CRowSerializerConfigSnapshot =>
- val compatResult = CompatibilityUtil.resolveCompatibilityResult(
- crowSerializerConfigSnapshot.getSingleNestedSerializerAndConfig.f0,
- classOf[UnloadableDummyTypeSerializer[_]],
- crowSerializerConfigSnapshot.getSingleNestedSerializerAndConfig.f1,
- rowSerializer)
-
- if (compatResult.isRequiresMigration) {
- if (compatResult.getConvertDeserializer != null) {
- CompatibilityResult.requiresMigration(
- new CRowSerializer(
- new
TypeDeserializerAdapter(compatResult.getConvertDeserializer))
- )
- } else {
- CompatibilityResult.requiresMigration()
- }
- } else {
- CompatibilityResult.compatible()
- }
-
- case _ => CompatibilityResult.requiresMigration()
- }
+ override def snapshotConfiguration(): TypeSerializerSnapshot[CRow] = {
+ new CRowSerializerSnapshot(this)
}
}
object CRowSerializer {
+ /**
+ * [[CRowSerializer]] is not meant to be used for persisting state. In
versions 1.6+ there
+ * were changes introduced that resulted in incompatibility in java
serialization. Thus one
+ * cannot read state in 1.8+ from snapshot written with previous versions
of Flink.
+ *
+ * Moreover this serializer is meant to be dropped once we migrate to the
new planner
+ * implementation.
+ */
class CRowSerializerConfigSnapshot(rowSerializers:
Array[TypeSerializer[Row]])
Review comment:
can you add a `@deprecated` annotation?
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