Add table for kafka exactly-once state

crates/arroyo-connectors/src/kafka/sink/mod.rs

@@ -1,6 +1,6 @@
 use anyhow::Result;
 
-use arroyo_rpc::grpc::TableConfig;
+use arroyo_rpc::grpc::{GlobalKeyedTableConfig, TableConfig, TableEnum};
 use arroyo_rpc::{CheckpointEvent, ControlMessage, ControlResp};
 use arroyo_types::*;
 use std::collections::HashMap;
@@ -18,6 +18,7 @@ use arroyo_operator::context::ArrowContext;
 use arroyo_operator::operator::ArrowOperator;
 use arroyo_types::CheckpointBarrier;
 use async_trait::async_trait;
+use prost::Message;
 use rdkafka::error::{KafkaError, RDKafkaErrorCode};
 use std::time::{Duration, SystemTime};
 
@@ -157,7 +158,18 @@ impl ArrowOperator for KafkaSinkFunc {
 
     fn tables(&self) -> HashMap<String, TableConfig> {
         if self.is_committing() {
-            todo!("implement committing state")
+            single_item_hash_map(
+                "i".to_string(),
+                TableConfig {
+                    table_type: TableEnum::GlobalKeyValue.into(),
+                    config: GlobalKeyedTableConfig {
+                        table_name: "i".to_string(),
+                        description: "index for transactional ids".to_string(),
+                        uses_two_phase_commit: true,
+                    }
+                    .encode_to_vec(),
+                },
+            )
         } else {
             HashMap::new()
         }