abhishekagarwal87 commented on code in PR #15141:
URL: https://github.com/apache/druid/pull/15141#discussion_r1357983261
##########
indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamEndSequenceNumbers.java:
##########
@@ -147,6 +148,40 @@ public SeekableStreamSequenceNumbers<PartitionIdType,
SequenceOffsetType> plus(
}
}
+ @Override
+ public int compareTo(SeekableStreamSequenceNumbers<PartitionIdType,
SequenceOffsetType> other)
+ {
+ if (this.getClass() != other.getClass()) {
+ throw new IAE(
+ "Expected instance of %s, got %s",
+ this.getClass().getName(),
+ other.getClass().getName()
+ );
+ }
+
+ final SeekableStreamEndSequenceNumbers<PartitionIdType,
SequenceOffsetType> otherStart =
+ (SeekableStreamEndSequenceNumbers<PartitionIdType,
SequenceOffsetType>) other;
+
+ if (stream.equals(otherStart.stream)) {
+ //Same stream, compare the offset
+ AtomicReference<Boolean> res = new AtomicReference<>(false);
+ partitionSequenceNumberMap.forEach(
+ (partitionId, sequenceOffset) -> {
+ if (otherStart.partitionSequenceNumberMap.get(partitionId) != null
&& Long.parseLong(String.valueOf(sequenceOffset)) >
Long.parseLong(String.valueOf(otherStart.partitionSequenceNumberMap.get(partitionId))))
{
Review Comment:
Yes. Kinesis sequence offsets are treated as opaque string.
##########
indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamEndSequenceNumbers.java:
##########
@@ -147,6 +148,40 @@ public SeekableStreamSequenceNumbers<PartitionIdType,
SequenceOffsetType> plus(
}
}
+ @Override
+ public int compareTo(SeekableStreamSequenceNumbers<PartitionIdType,
SequenceOffsetType> other)
+ {
+ if (this.getClass() != other.getClass()) {
+ throw new IAE(
+ "Expected instance of %s, got %s",
+ this.getClass().getName(),
+ other.getClass().getName()
+ );
+ }
+
+ final SeekableStreamEndSequenceNumbers<PartitionIdType,
SequenceOffsetType> otherStart =
+ (SeekableStreamEndSequenceNumbers<PartitionIdType,
SequenceOffsetType>) other;
+
+ if (stream.equals(otherStart.stream)) {
+ //Same stream, compare the offset
+ AtomicReference<Boolean> res = new AtomicReference<>(false);
+ partitionSequenceNumberMap.forEach(
+ (partitionId, sequenceOffset) -> {
+ if (otherStart.partitionSequenceNumberMap.get(partitionId) != null
&& Long.parseLong(String.valueOf(sequenceOffset)) >
Long.parseLong(String.valueOf(otherStart.partitionSequenceNumberMap.get(partitionId))))
{
Review Comment:
This could be done. Two methods should be added to DataSourceMetadata
```
isComparable (default return false)
compare() (default return 0)
```
These two methods will be implemented only by the KafkaDataSourceMetadata.
In that class, you can parse the offset to long.
In the IndexerSQLMetadataStorageCoordinator, you would first check
isComparable before calling compare method.
How does this sound?
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