/*
 * 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 com.dtstack.flink.sql.source.kafka;

import com.dtstack.flink.sql.source.AbsDeserialization;
import org.apache.flink.metrics.MetricGroup;
import org.apache.flink.streaming.api.functions.AssignerWithPeriodicWatermarks;
import org.apache.flink.streaming.api.functions.AssignerWithPunctuatedWatermarks;
import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;
import org.apache.flink.streaming.connectors.kafka.config.OffsetCommitMode;
import org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher;
import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
import org.apache.flink.types.Row;
import org.apache.flink.util.SerializedValue;

import java.util.Arrays;
import java.util.Map;
import java.util.Properties;
import java.util.regex.Pattern;

/**
 * @author: chuixue
 * @create: 2019-11-05 10:58
 * @description:
 **/
public class CustomerKafkaConsumer extends FlinkKafkaConsumer<Row> {

    private static final long serialVersionUID = -2265366268827807739L;

    private CustomerJsonDeserialization customerJsonDeserialization;

    public CustomerKafkaConsumer(String topic, AbsDeserialization<Row> valueDeserializer, Properties props) {
        super(Arrays.asList(topic.split(",")), valueDeserializer, props);
        this.customerJsonDeserialization = (CustomerJsonDeserialization) valueDeserializer;
    }

    public CustomerKafkaConsumer(Pattern subscriptionPattern, AbsDeserialization<Row> valueDeserializer, Properties props) {
        super(subscriptionPattern, valueDeserializer, props);
        this.customerJsonDeserialization = (CustomerJsonDeserialization) valueDeserializer;
    }

    @Override
    public void run(SourceContext<Row> sourceContext) throws Exception {
        customerJsonDeserialization.setRuntimeContext(getRuntimeContext());
        customerJsonDeserialization.initMetric();
        super.run(sourceContext);
    }

    @Override
    protected AbstractFetcher<Row, ?> createFetcher(SourceContext<Row> sourceContext, Map<KafkaTopicPartition, Long> assignedPartitionsWithInitialOffsets, SerializedValue<AssignerWithPeriodicWatermarks<Row>> watermarksPeriodic, SerializedValue<AssignerWithPunctuatedWatermarks<Row>> watermarksPunctuated, StreamingRuntimeContext runtimeContext, OffsetCommitMode offsetCommitMode, MetricGroup consumerMetricGroup, boolean useMetrics) throws Exception {
        AbstractFetcher<Row, ?> fetcher = super.createFetcher(sourceContext, assignedPartitionsWithInitialOffsets, watermarksPeriodic, watermarksPunctuated, runtimeContext, offsetCommitMode, consumerMetricGroup, useMetrics);
        customerJsonDeserialization.setFetcher(fetcher);
        return fetcher;
    }
}
