flink-connectors/flink-connector-kafka-0.10/src/main/java/org/apache/flink/streaming/connectors/kafka/Kafka010TableSource.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.streaming.connectors.kafka;

import org.apache.flink.annotation.Internal;
import org.apache.flink.api.common.serialization.DeserializationSchema;
import org.apache.flink.streaming.connectors.kafka.config.StartupMode;
import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
import org.apache.flink.table.api.TableSchema;
import org.apache.flink.table.sources.RowtimeAttributeDescriptor;
import org.apache.flink.table.sources.StreamTableSource;
import org.apache.flink.types.Row;

import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Properties;

/**
 * Kafka {@link StreamTableSource} for Kafka 0.10.
 */
@Internal
public class Kafka010TableSource extends KafkaTableSource {

	/**
	 * Creates a Kafka 0.10 {@link StreamTableSource}.
	 *
	 * @param schema                      Schema of the produced table.
	 * @param proctimeAttribute           Field name of the processing time attribute.
	 * @param rowtimeAttributeDescriptors Descriptor for a rowtime attribute
	 * @param fieldMapping                Mapping for the fields of the table schema to
	 *                                    fields of the physical returned type.
	 * @param topic                       Kafka topic to consume.
	 * @param properties                  Properties for the Kafka consumer.
	 * @param deserializationSchema       Deserialization schema for decoding records from Kafka.
	 * @param startupMode                 Startup mode for the contained consumer.
	 * @param specificStartupOffsets      Specific startup offsets; only relevant when startup
	 *                                    mode is {@link StartupMode#SPECIFIC_OFFSETS}.
	 */
	public Kafka010TableSource(
			TableSchema schema,
			Optional<String> proctimeAttribute,
			List<RowtimeAttributeDescriptor> rowtimeAttributeDescriptors,
			Optional<Map<String, String>> fieldMapping,
			String topic,
			Properties properties,
			DeserializationSchema<Row> deserializationSchema,
			StartupMode startupMode,
			Map<KafkaTopicPartition, Long> specificStartupOffsets) {

		super(
			schema,
			proctimeAttribute,
			rowtimeAttributeDescriptors,
			fieldMapping,
			topic,
			properties,
			deserializationSchema,
			startupMode,
			specificStartupOffsets);
	}

	/**
	 * Creates a Kafka 0.10 {@link StreamTableSource}.
	 *
	 * @param schema                Schema of the produced table.
	 * @param topic                 Kafka topic to consume.
	 * @param properties            Properties for the Kafka consumer.
	 * @param deserializationSchema Deserialization schema for decoding records from Kafka.
	 */
	public Kafka010TableSource(
			TableSchema schema,
			String topic,
			Properties properties,
			DeserializationSchema<Row> deserializationSchema) {

		super(schema, topic, properties, deserializationSchema);
	}

	@Override
	protected FlinkKafkaConsumerBase<Row> createKafkaConsumer(String topic, Properties properties, DeserializationSchema<Row> deserializationSchema) {
		return new FlinkKafkaConsumer010<>(topic, deserializationSchema, properties);
	}
}