Preethi.C created FLINK-11031:
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Summary: How to consume the Hive data in Flink using Scala
Key: FLINK-11031
URL: https://issues.apache.org/jira/browse/FLINK-11031
Project: Flink
Issue Type: Bug
Components: DataStream API
Affects Versions: 1.6.2
Reporter: Preethi.C
Fix For: 1.6.2
It showing the below error
"could not find implicit value for evidence parameter of type" when i call the
class,below are my code.
Object HiveMainMethod {
def main(args: Array[String]): Unit = {
val env = StreamExecutionEnvironment.getExecutionEnvironment
implicit val dataStream: DataStream[Hivedata] = env.addSource(new
JDBC_Connection)
}
}
class JDBC_Connection extends RichSourceFunction[Hivedata] {
private var connection: Connection = null
private var ps: PreparedStatement = null
override def open(parameters: Configuration): Unit = {
super.open(parameters)
val driver = "com.mysql.jdbc.Driver"
val url = "jdbc:mysql://qingcheng11:3306/flinktest"
val username = "root"
val password = "qingcheng"
Class.forName(driver)
connection = DriverManager.getConnection(url, username, password)
val sql = "select stuid,stuname,stuaddr,stusex from Student;"
ps = connection.prepareStatement(sql)
}
override def run(implicit sourceContext: SourceContext[Hivedata]): Unit = {
try {
val resultSet = ps.executeQuery()
while (resultSet.next()) {
val student = Hivedata(resultSet.getInt("ID"),
resultSet.getString("Name").trim)
sourceContext.collect(student)
}
}
catch {
case e: Exception => println(e.getMessage)
}
}
override def cancel(): Unit = {
}
override def close(): Unit = {
super.close()
if (connection != null) {
connection.close()
}
if (ps != null) {
ps.close()
}
}
}
Refered the below link
https://github.com/liguohua-bigdata/simple-flink/blob/master/book/stream/customSource/customSourceScala.md
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