flink-connector-kudu/src/main/java/org/apache/flink/connectors/kudu/table/dynamic/KuduDynamicTableSink.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.flink.connectors.kudu.table.dynamic;

import org.apache.flink.connectors.kudu.connector.KuduTableInfo;
import org.apache.flink.connectors.kudu.connector.writer.KuduWriterConfig;
import org.apache.flink.connectors.kudu.connector.writer.RowDataUpsertOperationMapper;
import org.apache.flink.connectors.kudu.streaming.KuduSink;
import org.apache.flink.table.api.TableSchema;
import org.apache.flink.table.connector.ChangelogMode;
import org.apache.flink.table.connector.sink.DynamicTableSink;
import org.apache.flink.table.connector.sink.SinkFunctionProvider;
import org.apache.flink.table.data.RowData;
import org.apache.flink.types.RowKind;
import org.apache.flink.util.Preconditions;

import java.util.Objects;

/**
 * A {@link KuduDynamicTableSink} for Kudu.
 */
public class KuduDynamicTableSink implements DynamicTableSink {
    private final KuduWriterConfig.Builder writerConfigBuilder;
    private final TableSchema flinkSchema;
    private final KuduTableInfo tableInfo;

    public KuduDynamicTableSink(KuduWriterConfig.Builder writerConfigBuilder, TableSchema flinkSchema,
                                KuduTableInfo tableInfo) {
        this.writerConfigBuilder = writerConfigBuilder;
        this.flinkSchema = flinkSchema;
        this.tableInfo = tableInfo;
    }

    @Override
    public ChangelogMode getChangelogMode(ChangelogMode requestedMode) {
        this.validatePrimaryKey(requestedMode);
        return ChangelogMode.newBuilder().addContainedKind(RowKind.INSERT).addContainedKind(RowKind.DELETE).addContainedKind(RowKind.UPDATE_AFTER).build();
    }

    private void validatePrimaryKey(ChangelogMode requestedMode) {
        Preconditions.checkState(ChangelogMode.insertOnly().equals(requestedMode) || this.tableInfo.getSchema().getPrimaryKeyColumnCount() != 0, "please declare primary key for sink table when query contains update/delete record.");
    }

    @Override
    public SinkRuntimeProvider getSinkRuntimeProvider(Context context) {
        KuduSink<RowData> upsertKuduSink = new KuduSink<>(writerConfigBuilder.build(), tableInfo,
                new RowDataUpsertOperationMapper(flinkSchema));
        return SinkFunctionProvider.of(upsertKuduSink);
    }

    @Override
    public DynamicTableSink copy() {
        return new KuduDynamicTableSink(this.writerConfigBuilder, this.flinkSchema, this.tableInfo);
    }

    @Override
    public String asSummaryString() {
        return "kudu";
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        KuduDynamicTableSink that = (KuduDynamicTableSink) o;
        return Objects.equals(writerConfigBuilder, that.writerConfigBuilder) && Objects.equals(flinkSchema,
                that.flinkSchema) && Objects.equals(tableInfo, that.tableInfo);
    }

    @Override
    public int hashCode() {
        return Objects.hash(writerConfigBuilder, flinkSchema, tableInfo);
    }
}