Spark streaming data from kafka topic and write into the text files in external path
0
I want to read a data from kafka topic and group by key values, and write into text files..
public static void main(String args) throws Exception {
SparkSession spark=SparkSession
.builder()
.appName("Sparkconsumer")
.master("local[*]")
.getOrCreate();
SQLContext sqlContext = spark.sqlContext();
SparkContext context = spark.sparkContext();
Dataset<Row>lines=spark
.readStream()
.format("kafka")
.option("kafka.bootstrap.servers", "localhost:9092")
.option("subscribe","test-topic")
.load();
Dataset<Row> r= lines.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)");
r.printSchema();
r.createOrReplaceTempView("basicView");
sqlContext.sql("select * from basicView")
.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)")
.writeStream()
.outputMode("append")
.format("console")
.option("path","usr//path")
.start()
.awaitTermination();
java apache-spark apache-kafka spark-structured-streaming
edited Nov 23 at 16:20
cricket_007
79.2k1142109
asked Nov 23 at 7:36
Paunraj
76
|
show 3 more comments
0
I want to read a data from kafka topic and group by key values, and write into text files..
public static void main(String args) throws Exception {
SparkSession spark=SparkSession
.builder()
.appName("Sparkconsumer")
.master("local[*]")
.getOrCreate();
SQLContext sqlContext = spark.sqlContext();
SparkContext context = spark.sparkContext();
Dataset<Row>lines=spark
.readStream()
.format("kafka")
.option("kafka.bootstrap.servers", "localhost:9092")
.option("subscribe","test-topic")
.load();
Dataset<Row> r= lines.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)");
r.printSchema();
r.createOrReplaceTempView("basicView");
sqlContext.sql("select * from basicView")
.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)")
.writeStream()
.outputMode("append")
.format("console")
.option("path","usr//path")
.start()
.awaitTermination();
java apache-spark apache-kafka spark-structured-streaming
edited Nov 23 at 16:20
cricket_007
79.2k1142109
asked Nov 23 at 7:36
Paunraj
76
format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter
– Aydin K.
Nov 23 at 7:38
1
What is the error you are getting ?
– mrsrinivas
Nov 23 at 8:50
Not sure I understand why you'd use Spark for this
– cricket_007
Nov 23 at 16:13
@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error
– Paunraj
Nov 23 at 16:16
@cricket_007 I want streaming the data from Kafka topic..
– Paunraj
Nov 23 at 16:17
|
show 3 more comments
0
0
0
I want to read a data from kafka topic and group by key values, and write into text files..
public static void main(String args) throws Exception {
SparkSession spark=SparkSession
.builder()
.appName("Sparkconsumer")
.master("local[*]")
.getOrCreate();
SQLContext sqlContext = spark.sqlContext();
SparkContext context = spark.sparkContext();
Dataset<Row>lines=spark
.readStream()
.format("kafka")
.option("kafka.bootstrap.servers", "localhost:9092")
.option("subscribe","test-topic")
.load();
Dataset<Row> r= lines.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)");
r.printSchema();
r.createOrReplaceTempView("basicView");
sqlContext.sql("select * from basicView")
.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)")
.writeStream()
.outputMode("append")
.format("console")
.option("path","usr//path")
.start()
.awaitTermination();
java apache-spark apache-kafka spark-structured-streaming
edited Nov 23 at 16:20
cricket_007
79.2k1142109
asked Nov 23 at 7:36
Paunraj
76
I want to read a data from kafka topic and group by key values, and write into text files..
public static void main(String args) throws Exception {
SparkSession spark=SparkSession
.builder()
.appName("Sparkconsumer")
.master("local[*]")
.getOrCreate();
SQLContext sqlContext = spark.sqlContext();
SparkContext context = spark.sparkContext();
Dataset<Row>lines=spark
.readStream()
.format("kafka")
.option("kafka.bootstrap.servers", "localhost:9092")
.option("subscribe","test-topic")
.load();
Dataset<Row> r= lines.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)");
r.printSchema();
r.createOrReplaceTempView("basicView");
sqlContext.sql("select * from basicView")
.selectExpr("CAST(key AS STRING)", "CAST(value AS STRING)")
.writeStream()
.outputMode("append")
.format("console")
.option("path","usr//path")
.start()
.awaitTermination();
java apache-spark apache-kafka spark-structured-streaming
java apache-spark apache-kafka spark-structured-streaming
edited Nov 23 at 16:20
cricket_007
79.2k1142109
asked Nov 23 at 7:36
Paunraj
76
edited Nov 23 at 16:20
cricket_007
79.2k1142109
asked Nov 23 at 7:36
Paunraj
76
edited Nov 23 at 16:20
cricket_007
79.2k1142109
edited Nov 23 at 16:20
cricket_007
79.2k1142109
edited Nov 23 at 16:20
cricket_007
79.2k1142109
79.2k1142109
asked Nov 23 at 7:36
Paunraj
76
asked Nov 23 at 7:36
Paunraj
76
asked Nov 23 at 7:36
Paunraj
76
76
format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter
– Aydin K.
Nov 23 at 7:38
1
What is the error you are getting ?
– mrsrinivas
Nov 23 at 8:50
Not sure I understand why you'd use Spark for this
– cricket_007
Nov 23 at 16:13
@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error
– Paunraj
Nov 23 at 16:16
@cricket_007 I want streaming the data from Kafka topic..
– Paunraj
Nov 23 at 16:17
|
show 3 more comments
format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter
– Aydin K.
Nov 23 at 7:38
1
What is the error you are getting ?
– mrsrinivas
Nov 23 at 8:50
Not sure I understand why you'd use Spark for this
– cricket_007
Nov 23 at 16:13
@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error
– Paunraj
Nov 23 at 16:16
@cricket_007 I want streaming the data from Kafka topic..
– Paunraj
Nov 23 at 16:17
format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter
– Aydin K.
Nov 23 at 7:38
format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter
– Aydin K.
Nov 23 at 7:38
1
1
What is the error you are getting ?
– mrsrinivas
Nov 23 at 8:50
What is the error you are getting ?
– mrsrinivas
Nov 23 at 8:50
Not sure I understand why you'd use Spark for this
– cricket_007
Nov 23 at 16:13
Not sure I understand why you'd use Spark for this
– cricket_007
Nov 23 at 16:13
@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error
– Paunraj
Nov 23 at 16:16
@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error
– Paunraj
Nov 23 at 16:16
@cricket_007 I want streaming the data from Kafka topic..
– Paunraj
Nov 23 at 16:17
@cricket_007 I want streaming the data from Kafka topic..
– Paunraj
Nov 23 at 16:17
|
show 3 more comments
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format(”console“) writes to console/stdout and not into a file. Use json or csv instead as parameter
– Aydin K.
Nov 23 at 7:38
1
What is the error you are getting ?
– mrsrinivas
Nov 23 at 8:50
Not sure I understand why you'd use Spark for this
– cricket_007
Nov 23 at 16:13
@AydinK. I know that one but when I run this program it will create folder and nothing in that folder.. that's the error
– Paunraj
Nov 23 at 16:16
@cricket_007 I want streaming the data from Kafka topic..
– Paunraj
Nov 23 at 16:17