feat(connector-node): specify sink payload format in start sink and call close for iterator and sink row

java/connector-node/assembly/scripts/start-service.sh

@@ -15,7 +15,7 @@ while getopts ":h:p:" o; do
 done
 shift $((OPTIND-1))
 
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+DIR="$( cd "$( dirname "$0" )" && pwd )"
 MAIN='com.risingwave.connector.ConnectorService'
 PORT=50051
 

java/connector-node/connector-api/src/main/java/com/risingwave/connector/api/sink/ArraySinkrow.java → java/connector-node/connector-api/src/main/java/com/risingwave/connector/api/sink/ArraySinkRow.java

@@ -16,11 +16,11 @@
 
 import com.risingwave.proto.Data;
 
-public class ArraySinkrow implements SinkRow {
+public class ArraySinkRow implements SinkRow {
     public final Object[] values;
     public final Data.Op op;
 
-    public ArraySinkrow(Data.Op op, Object... value) {
+    public ArraySinkRow(Data.Op op, Object... value) {
         this.op = op;
         this.values = value;
     }
@@ -39,4 +39,7 @@ public Data.Op getOp() {
     public int size() {
         return values.length;
     }
+
+    @Override
+    public void close() throws Exception {}
 }

java/connector-node/connector-api/src/main/java/com/risingwave/connector/api/sink/CloseableIterator.java

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2023 RisingWave Labs
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.risingwave.connector.api.sink;
+
+import java.util.Iterator;
+
+public interface CloseableIterator<E> extends AutoCloseable, Iterator<E> {}

java/connector-node/risingwave-connector-service/src/main/java/com/risingwave/connector/Deserializer.java → java/connector-node/connector-api/src/main/java/com/risingwave/connector/api/sink/Deserializer.java

@@ -12,11 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.risingwave.connector;
+package com.risingwave.connector.api.sink;
 
-import com.risingwave.connector.api.sink.SinkRow;
-import java.util.Iterator;
+import com.risingwave.proto.ConnectorServiceProto;
 
 public interface Deserializer {
-    Iterator<SinkRow> deserialize(Object payload);
+    CloseableIterator<SinkRow> deserialize(
+            ConnectorServiceProto.SinkStreamRequest.WriteBatch writeBatch);
 }

java/connector-node/connector-api/src/main/java/com/risingwave/connector/api/sink/SinkRow.java

@@ -16,10 +16,10 @@
 
 import com.risingwave.proto.Data;
 
-public interface SinkRow {
-    public Object get(int index);
+public interface SinkRow extends AutoCloseable {
+    Object get(int index);
 
-    public Data.Op getOp();
+    Data.Op getOp();
 
-    public int size();
+    int size();
 }

java/connector-node/connector-api/src/main/java/com/risingwave/connector/api/sink/TrivialCloseIterator.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2023 RisingWave Labs
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.risingwave.connector.api.sink;
+
+import java.util.Iterator;
+
+public class TrivialCloseIterator<E> implements CloseableIterator<E> {
+
+    private final Iterator<E> inner;
+
+    public TrivialCloseIterator(Iterator<E> inner) {
+        this.inner = inner;
+    }
+
+    @Override
+    public void close() throws Exception {}
+
+    @Override
+    public boolean hasNext() {
+        return inner.hasNext();
+    }
+
+    @Override
+    public E next() {
+        return inner.next();
+    }
+}

java/connector-node/python-client/integration_tests.py

@@ -46,6 +46,7 @@ def test_upsert_sink(type, prop, input_file):
         stub = connector_service_pb2_grpc.ConnectorServiceStub(channel)
         request_list = [
             connector_service_pb2.SinkStreamRequest(start=connector_service_pb2.SinkStreamRequest.StartSink(
+                format=connector_service_pb2.SinkPayloadFormat.JSON,
                 sink_config=connector_service_pb2.SinkConfig(
                     connector_type=type,
                     properties=prop,
@@ -85,6 +86,7 @@ def test_sink(type, prop, input_file):
         stub = connector_service_pb2_grpc.ConnectorServiceStub(channel)
         request_list = [
             connector_service_pb2.SinkStreamRequest(start=connector_service_pb2.SinkStreamRequest.StartSink(
+                format=connector_service_pb2.SinkPayloadFormat.JSON,
                 sink_config=connector_service_pb2.SinkConfig(
                     connector_type=type,
                     properties=prop,

java/connector-node/risingwave-connector-service/src/main/java/com/risingwave/connector/FileSink.java

@@ -57,25 +57,28 @@ public FileSink(String sinkPath, TableSchema tableSchema) {
     @Override
     public void write(Iterator<SinkRow> rows) {
         while (rows.hasNext()) {
-            SinkRow row = rows.next();
-            switch (row.getOp()) {
-                case INSERT:
-                    String buf =
-                            new Gson()
-                                    .toJson(
-                                            IntStream.range(0, row.size())
-                                                    .mapToObj(row::get)
-                                                    .toArray());
-                    try {
-                        sinkWriter.write(buf + System.lineSeparator());
-                    } catch (IOException e) {
-                        throw INTERNAL.withCause(e).asRuntimeException();
-                    }
-                    break;
-                default:
-                    throw UNIMPLEMENTED
-                            .withDescription("unsupported operation: " + row.getOp())
-                            .asRuntimeException();
+            try (SinkRow row = rows.next()) {
+                switch (row.getOp()) {
+                    case INSERT:
+                        String buf =
+                                new Gson()
+                                        .toJson(
+                                                IntStream.range(0, row.size())
+                                                        .mapToObj(row::get)
+                                                        .toArray());
+                        try {
+                            sinkWriter.write(buf + System.lineSeparator());
+                        } catch (IOException e) {
+                            throw INTERNAL.withCause(e).asRuntimeException();
+                        }
+                        break;
+                    default:
+                        throw UNIMPLEMENTED
+                                .withDescription("unsupported operation: " + row.getOp())
+                                .asRuntimeException();
+                }
+            } catch (Exception e) {
+                throw new RuntimeException(e);
             }
         }
     }

java/connector-node/risingwave-connector-service/src/main/java/com/risingwave/connector/JsonDeserializer.java

@@ -18,11 +18,10 @@
 
 import com.google.gson.Gson;
 import com.risingwave.connector.api.TableSchema;
-import com.risingwave.connector.api.sink.ArraySinkrow;
-import com.risingwave.connector.api.sink.SinkRow;
+import com.risingwave.connector.api.sink.*;
+import com.risingwave.proto.ConnectorServiceProto;
 import com.risingwave.proto.ConnectorServiceProto.SinkStreamRequest.WriteBatch.JsonPayload;
 import com.risingwave.proto.Data;
-import java.util.Iterator;
 import java.util.Map;
 
 public class JsonDeserializer implements Deserializer {
@@ -33,34 +32,39 @@ public JsonDeserializer(TableSchema tableSchema) {
     }
 
     @Override
-    public Iterator<SinkRow> deserialize(Object payload) {
-        if (!(payload instanceof JsonPayload)) {
+    public CloseableIterator<SinkRow> deserialize(
+            ConnectorServiceProto.SinkStreamRequest.WriteBatch writeBatch) {
+        if (!writeBatch.hasJsonPayload()) {
             throw INVALID_ARGUMENT
-                    .withDescription("expected JsonPayload, got " + payload.getClass().getName())
+                    .withDescription("expected JsonPayload, got " + writeBatch.getPayloadCase())
                     .asRuntimeException();
         }
-        JsonPayload jsonPayload = (JsonPayload) payload;
-        return jsonPayload.getRowOpsList().stream()
-                .map(
-                        rowOp -> {
-                            Map columnValues = new Gson().fromJson(rowOp.getLine(), Map.class);
-                            Object[] values = new Object[columnValues.size()];
-                            for (String columnName : tableSchema.getColumnNames()) {
-                                if (!columnValues.containsKey(columnName)) {
-                                    throw INVALID_ARGUMENT
-                                            .withDescription(
-                                                    "column " + columnName + " not found in json")
-                                            .asRuntimeException();
-                                }
-                                Data.DataType.TypeName typeName =
-                                        tableSchema.getColumnType(columnName);
-                                values[tableSchema.getColumnIndex(columnName)] =
-                                        validateJsonDataTypes(
-                                                typeName, columnValues.get(columnName));
-                            }
-                            return (SinkRow) new ArraySinkrow(rowOp.getOpType(), values);
-                        })
-                .iterator();
+        JsonPayload jsonPayload = writeBatch.getJsonPayload();
+        return new TrivialCloseIterator<>(
+                jsonPayload.getRowOpsList().stream()
+                        .map(
+                                rowOp -> {
+                                    Map columnValues =
+                                            new Gson().fromJson(rowOp.getLine(), Map.class);
+                                    Object[] values = new Object[columnValues.size()];
+                                    for (String columnName : tableSchema.getColumnNames()) {
+                                        if (!columnValues.containsKey(columnName)) {
+                                            throw INVALID_ARGUMENT
+                                                    .withDescription(
+                                                            "column "
+                                                                    + columnName
+                                                                    + " not found in json")
+                                                    .asRuntimeException();
+                                        }
+                                        Data.DataType.TypeName typeName =
+                                                tableSchema.getColumnType(columnName);
+                                        values[tableSchema.getColumnIndex(columnName)] =
+                                                validateJsonDataTypes(
+                                                        typeName, columnValues.get(columnName));
+                                    }
+                                    return (SinkRow) new ArraySinkRow(rowOp.getOpType(), values);
+                                })
+                        .iterator());
     }
 
     private static Long castLong(Object value) {

java/connector-node/risingwave-connector-service/src/main/java/com/risingwave/connector/PrintSink.java

@@ -40,13 +40,18 @@ public PrintSink(Map<String, String> properties, TableSchema tableSchema, PrintS
     @Override
     public void write(Iterator<SinkRow> rows) {
         while (rows.hasNext()) {
-            SinkRow row = rows.next();
-            out.println(
-                    "PrintSink: "
-                            + row.getOp().name()
-                            + " values "
-                            + Arrays.toString(
-                                    IntStream.range(0, row.size()).mapToObj(row::get).toArray()));
+            try (SinkRow row = rows.next()) {
+                out.println(
+                        "PrintSink: "
+                                + row.getOp().name()
+                                + " values "
+                                + Arrays.toString(
+                                        IntStream.range(0, row.size())
+                                                .mapToObj(row::get)
+                                                .toArray()));
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
         }
     }