belliottsmith commented on code in PR #4202:
URL: https://github.com/apache/cassandra/pull/4202#discussion_r2184907125
##########
src/java/org/apache/cassandra/service/accord/serializers/TopologySerializers.java:
##########
@@ -159,4 +167,127 @@ public long serializedSize(Topology topology)
return size;
}
};
+
+ public static final UnversionedSerializer<Topology> compactTopology = new
UnversionedSerializer<>()
+ {
+ @Override
+ public void serialize(Topology topology, DataOutputPlus out) throws
IOException
+ {
+ out.writeLong(topology.epoch());
+ CollectionSerializers.serializeList(topology.staleIds(), out,
TopologySerializers.nodeId);
+
+ List<Shard> shards = topology.shards();
+
+ // need to loop twice; once to collect tables/ranges, and another
to save shards
+ ImmutableUniqueList<TableId> tables;
+ ImmutableUniqueList<TokenRange> ranges;
+ {
+ ImmutableUniqueList.Builder<TableId> tablesBuilder =
ImmutableUniqueList.builder();
+ ImmutableUniqueList.Builder<TokenRange> rangesBuilder =
ImmutableUniqueList.builder();
+ for (Shard shard : shards)
+ {
+ TokenRange range = (TokenRange) shard.range;
+ tablesBuilder.add(range.table());
+ rangesBuilder.add(range.withTable(TableId.UNDEFINED));
+ }
+ tables = tablesBuilder.buildAndClear();
+ ranges = rangesBuilder.buildAndClear();
+ }
+
+ CollectionSerializers.serializeList(tables, out,
TableId.compactComparableSerializer);
+ CollectionSerializers.serializeList(ranges, out,
TokenRange.noTableSerializer);
+
+ out.writeUnsignedVInt32(shards.size());
+ for (Shard shard : shards)
+ {
+ TokenRange range = (TokenRange) shard.range;
+ int tableIdx = tables.indexOf(range.table());
+ int rangeIdx =
ranges.indexOf(range.withTable(TableId.UNDEFINED));
+ out.writeUnsignedVInt32(tableIdx);
+ out.writeUnsignedVInt32(rangeIdx);
+
+ CollectionSerializers.serializeList(shard.nodes, out,
TopologySerializers.nodeId);
+ BitSet notInFastPath = SortedArrays.toBitSet(shard.nodes,
shard.notInFastPath);
+ BitSetSerializer.instance.serialize(notInFastPath, out);
Review Comment:
If we use accord's `SimpleBitSet` we can de/serialize without allocating a
new byte[]
--
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: pr-unsubscr...@cassandra.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: pr-unsubscr...@cassandra.apache.org
For additional commands, e-mail: pr-h...@cassandra.apache.org
