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| import lombok.Data;
import lombok.val;
import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;
import org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
import org.apache.flink.streaming.util.serialization.KeyedDeserializationSchema;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.serialization.StringDeserializer;
import java.io.IOException;
import java.util.*;
@Data
class KafkaMsg {
private String key;
private String value;
private String topic;
private Integer partition;
private Long offSet;
public KafkaMsg() {
}
public KafkaMsg(String key, String value, String topic, Integer partition, Long offSet) {
this.key = key;
this.value = value;
this.topic = topic;
this.partition = partition;
this.offSet = offSet;
}
}
class TypedKeyedDeserializationSchema implements KeyedDeserializationSchema<KafkaMsg> {
@Override
public KafkaMsg deserialize(byte[] key, byte[] value, String topic, int partition, long offset) throws IOException {
System.out.println("key = " + key);
if (key == null){
key=new byte[0] ;
}
System.out.println("value = " + value);
System.out.println("topic = " + topic);
System.out.println("partition = " + partition);
System.out.println("offset = " + offset);
return new KafkaMsg(new String(key),new String(value),topic,partition,offset);
}
@Override
public boolean isEndOfStream(KafkaMsg kafkaMsg) {
return false;
}
@Override
public TypeInformation<KafkaMsg> getProducedType() {
return TypeInformation.of(KafkaMsg.class);
}
}
public class FlinkKafkaConsumer1 {
public static void main(String[] args) throws Exception {
StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
env.setParallelism(1);
Properties properties = new Properties();
properties.setProperty("group.id","test-consumer-group");
properties.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "192.168.16.110:9092");
properties.put("security.protocol", "SASL_PLAINTEXT");
properties.put("sasl.mechanism", "PLAIN");
System.setProperty("java.security.auth.login.config", "D:\\workspace\\java\\yunque\\flinkconnectors\\src\\main\\resources\\read_jaas.conf");
FlinkKafkaConsumer<KafkaMsg> kafkaConsumer = new FlinkKafkaConsumer<>(
"csdn01",
new TypedKeyedDeserializationSchema(),
properties
);
Map map = latest_off("192.168.16.110:9092","csdn01",0);
System.out.println("map = " + map);
HashMap<KafkaTopicPartition, Long> kafkaTopicPartitionLongHashMap = new HashMap<>();
KafkaTopicPartition partition = new KafkaTopicPartition("first1", 0);
Long offset = 0L ;
kafkaTopicPartitionLongHashMap.put(partition, offset);
kafkaConsumer.setStartFromSpecificOffsets(kafkaTopicPartitionLongHashMap);
env.addSource(kafkaConsumer).print();
env.execute();
}
public static Map latest_off(String broker, String topic, Integer partition) {
Properties props = new Properties() ;
props.put("bootstrap.servers", broker);
props.put("group.id", "test-consumer-group");
props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
props.put("security.protocol", "SASL_PLAINTEXT");
props.put("sasl.mechanism", "PLAIN");
System.setProperty("java.security.auth.login.config", "D:\\workspace\\java\\yunque\\flinkconnectors\\src\\main\\resources\\read_jaas.conf");
KafkaConsumer consumer = new KafkaConsumer(props);
Collection<TopicPartition> partitions = new ArrayList<>();
TopicPartition topicPartition = new TopicPartition(topic, partition);
partitions.add(topicPartition);
Map map = consumer.endOffsets(partitions);
return map ;
}
}
|
