hive-ormlite
Light Weight ORM which convert Hive Table records on HDFS to an Java object using annotation.
Usage:
Lets assume you have following table in Hive
hive> describe student; OK name string age int phoneno double subject array numbers map<string,int> size structst:string union uniontype<int,string>
To Map Java Student class, following is class information: Using Student Class assuming thrift server is running on machine 10.0.0.1 and port 9083
public class Main
{
public static void main(String args[]) throws TException, DbConfigAnnotaionMissingException, InstantiationException, IllegalAccessException, FactoryInstantiationException {
HiveBuilderFactory hiveBuilderFactory = HiveBuilderFactory.Instance("thrift://10.0.0.1:9083");
Text studentRecords = new Text("Akash,1,7798987147,,,");
Student student = hiveBuilderFactory.deSerialize(Student.class, studentRecords);
System.out.println(student.age);
System.out.println(student.phoneNo);
System.out.println(student.name);
System.out.println(student.subject);
}
@HiveDbConfig(db="test",table ="student")
public class Student {
String name;
Integer age;
Double phoneNo;
String subject;
String numbers;
String size;
String uni;
}
}
This will result in output
1 7.798987147E9 Akash null