Basic AWS Glue concepts

import sys
from awsglue.transforms import *
from awsglue.utils import getResolvedOptions
from pyspark.context import SparkContext
from awsglue.context import GlueContext
from awsglue.dynamicframe import DynamicFrame
from awsglue.job import Job

args = getResolvedOptions(sys.argv, ['JOB_NAME'])

sc = SparkContext()

glueContext = GlueContext(sc)
spark = glueContext.spark_session
job = Job(glueContext)

## Read Data from a RDS DB using JDBC driver
connection_option = {
"url": "jdbc:mysql://mysql–instance1.123456789012.us-east-1.rds.amazonaws.com:3306/database",
"user": "test",
"password": "password",
"dbtable": "test_table",
"hashexpression": "column_name",
"hashpartitions": "10"
}

source_df = glueContext.create_dynamic_frame.from_options('mysql', connection_options = connection_option, transformation_ctx = "source_df")

job.init(args['JOB_NAME'], args)

## Convert DataFrames to *AWS Glue* 's DynamicFrames Object
dynamic_df = DynamicFrame.fromDF(source_df, glueContext, "dynamic_df")

## Write Dynamic Frame to S3 in CSV format
datasink = glueContext.write_dynamic_frame.from_options(frame = dynamic_df, connection_type = "s3", connection_options = {
"path": "s3://glueuserdata"
}, format = "csv", transformation_ctx = "datasink")

job.commit()