X-Git-Url: https://gerrit.onap.org/r/gitweb?a=blobdiff_plain;f=vnfs%2FDAaaS%2Ftraining-core%2Fhdfs-writer-source-code%2Fhdfs-writer%2Fsrc%2Fmain%2Fjava%2FCreateKafkaConsumer.java;fp=vnfs%2FDAaaS%2Ftraining-core%2Fhdfs-writer-source-code%2Fhdfs-writer%2Fsrc%2Fmain%2Fjava%2FCreateKafkaConsumer.java;h=2042a14649c0732a8257ac85ff6932269c1e357c;hb=24d0c131ec95b43934dfb76ec397392ff851dbcf;hp=0000000000000000000000000000000000000000;hpb=0696abe27f2f8f2c19931a0d2c5ad0badaf5d236;p=demo.git diff --git a/vnfs/DAaaS/training-core/hdfs-writer-source-code/hdfs-writer/src/main/java/CreateKafkaConsumer.java b/vnfs/DAaaS/training-core/hdfs-writer-source-code/hdfs-writer/src/main/java/CreateKafkaConsumer.java new file mode 100644 index 00000000..2042a146 --- /dev/null +++ b/vnfs/DAaaS/training-core/hdfs-writer-source-code/hdfs-writer/src/main/java/CreateKafkaConsumer.java @@ -0,0 +1,81 @@ +import config.Configuration; +import org.apache.hadoop.fs.FSDataOutputStream; +import org.apache.hadoop.fs.FileSystem; +import org.apache.kafka.clients.consumer.ConsumerConfig; +import org.apache.kafka.clients.consumer.ConsumerRecord; +import org.apache.kafka.clients.consumer.ConsumerRecords; +import org.apache.kafka.clients.consumer.KafkaConsumer; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; +import java.util.*; + +public class CreateKafkaConsumer { + + + private static Logger log = LoggerFactory.getLogger(CreateKafkaConsumer.class); + + private final String BOOTSTRAP_SERVERS = (String) Configuration.getSettings().get("kafka").get("bootStrapServers"); + private final String GROUP_ID_CONFIG = (String) Configuration.getSettings().get("kafka").get("group_id"); + private final String KEY_DESERIALIZER = (String) Configuration.getSettings().get("kafka").get("key_deserialize_class"); + private final String VAL_DESERIALIZER = (String) Configuration.getSettings().get("kafka").get("value_deserialize_class"); + private final String KAFKA_TOPIC = (String) Configuration.getSettings().get("kafka").get("topic"); + + private final String HDFS_URL= (String) Configuration.getSettings().get("hdfs").get("hdfsURL"); + private final String HDFS_REMOTE_FILE = (String) Configuration.getSettings().get("hdfs").get("hdfs_remote_file"); + + private KafkaConsumer kafkaConsumer; + private Properties properties = new Properties(); + private HdfsWriter hdfsWriter; + private FileSystem hdfsFileSystem; + + + + public CreateKafkaConsumer() throws IOException{ + setKafkaProperties(); + kafkaConsumer = new KafkaConsumer<>(properties); + kafkaConsumer.subscribe(Collections.singletonList(KAFKA_TOPIC)); + hdfsWriter = new HdfsWriter(); + hdfsFileSystem = hdfsWriter.createHdfsFileSystem(HDFS_URL); + log.info(":::Created kafkaConsumer:::"); + } + + private void setKafkaProperties(){ + + properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, BOOTSTRAP_SERVERS); + properties.put(ConsumerConfig.GROUP_ID_CONFIG, GROUP_ID_CONFIG); + properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, KEY_DESERIALIZER); + properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, VAL_DESERIALIZER); + log.info(":::Set kafka properties:::"); + } + + + public void processKafkaMessage() throws IOException{ + try{ + while(true){ + ConsumerRecords recordsPerPartition = kafkaConsumer.poll(100000); + if(recordsPerPartition.isEmpty()) + log.info(":::recordsPerPartition is NULL:::"); + else + log.info(":::size of recordsPerPartition: "+recordsPerPartition.count()+" :::"); + + for(ConsumerRecord record:recordsPerPartition){ + log.info("Topic: "+record.topic()); + log.info("partition: "+record.partition()); + log.info("ReceivedKey: "+record.key()+" ReceivedValue: "+record.value()); + FSDataOutputStream fsDataOutputStream = hdfsWriter.invokeHdfsWriter(hdfsFileSystem, HDFS_REMOTE_FILE); + hdfsWriter.writeMessageToHdfs(fsDataOutputStream, record.value()); + fsDataOutputStream.close(); + } + + } + } + + finally { + log.info(":::Closing kafkaConsumer:::"); + kafkaConsumer.close(); + } + } +}