def s3_to_final(**context):
"""
Copy statement from s3 into final table
Args:
**context: Airflow context
"""
list_s3_for_table = context['task_instance'].xcom_pull(
task_ids='list_s3_for_table')
table_name = context['task_instance'].xcom_pull(task_ids='load_definition',
key='table_name')
table_columns = context['task_instance'].xcom_pull(
task_ids='load_definition', key='table_columns')
schema = context['task_instance'].xcom_pull(task_ids='load_definition',
key='schema')
last_batch = context['task_instance'].xcom_pull(
task_ids='extract_last_batch_date', key='last_batch_for_table_check')
list_s3_for_table = [
s3_key for s3_key in list_s3_for_table if
s3_key.split('/')[-2].split('=')[1] > str(pd.to_datetime(last_batch))
]
list_s3_for_table = sorted(
list(
set([
'/'.join(s3_key.split('/')[:-1]) + '/'
for s3_key in list_s3_for_table
])))
if list_s3_for_table:
logger.info('Number of keys to push to Redshift are: {count}'.format(
count=len(list_s3_for_table)))
to_final_task = S3ToRedshiftTransfer(
task_id='to_final',
schema=schema,
table=table_name,
s3_bucket=Variable.get(
'sanitization_s3_sanit_def_files_folder').split('/')[0],
s3_key=list_s3_for_table,
aws_conn_id='s3_etl',
cols=table_columns,
redshift_conn_id='snowplow_redshift',
is_truncate=False,
copy_options=dag_config["module_conversion_copy_options"])
to_final_task.execute(context=context)
else:
logger.info('Table is up to date!! No need to push data to it!!')
def test_execute(self, mock_run, mock_Session):
access_key = "aws_access_key_id"
secret_key = "aws_secret_access_key"
mock_Session.return_value = Session(access_key, secret_key)
schema = "schema"
table = "table"
s3_bucket = "bucket"
s3_key = "key"
copy_options = ""
t = S3ToRedshiftTransfer(schema=schema,
table=table,
s3_bucket=s3_bucket,
s3_key=s3_key,
copy_options=copy_options,
redshift_conn_id="redshift_conn_id",
aws_conn_id="aws_conn_id",
task_id="task_id",
dag=None)
t.execute(None)
copy_query = """
COPY {schema}.{table}
FROM 's3://{s3_bucket}/{s3_key}/{table}'
with credentials
'aws_access_key_id={access_key};aws_secret_access_key={secret_key}'
{copy_options};
""".format(schema=schema,
table=table,
s3_bucket=s3_bucket,
s3_key=s3_key,
access_key=access_key,
secret_key=secret_key,
copy_options=copy_options)
def _trim(s):
return re.sub("\s+", " ", s.strip())
self.assertEqual(_trim(mock_run.call_args[0][0]), _trim(copy_query))
mock_run.assert_called_once()
def test_execute(self, mock_run, mock_Session):
access_key = "aws_access_key_id"
secret_key = "aws_secret_access_key"
mock_Session.return_value = Session(access_key, secret_key)
schema = "schema"
table = "table"
s3_bucket = "bucket"
s3_key = "key"
copy_options = ""
t = S3ToRedshiftTransfer(
schema=schema,
table=table,
s3_bucket=s3_bucket,
s3_key=s3_key,
copy_options=copy_options,
redshift_conn_id="redshift_conn_id",
aws_conn_id="aws_conn_id",
task_id="task_id",
dag=None)
t.execute(None)
copy_query = """
COPY {schema}.{table}
FROM 's3://{s3_bucket}/{s3_key}/{table}'
with credentials
'aws_access_key_id={access_key};aws_secret_access_key={secret_key}'
{copy_options};
""".format(schema=schema,
table=table,
s3_bucket=s3_bucket,
s3_key=s3_key,
access_key=access_key,
secret_key=secret_key,
copy_options=copy_options)
assert mock_run.call_count == 1
assertEqualIgnoreMultipleSpaces(self, mock_run.call_args[0][0], copy_query)
start = DummyOperator(task_id='start_execution')
upload_raw_data = BashOperator(
task_id='upload_raw_data_to_s3',
bash_command='python ../upload_to_s3.py'
)
create_tables = PostgresOperator(
task_id='create_tables',
sql='create_tables.sql'
)
stage_tweets = S3ToRedshiftTransfer(
task_id='stage_tweets_to_redshift',
schema='{{ params.redshift_schema }}',
table='staging_tweets',
s3_bucket='{{ params.s3_bucket }}',
s3_key='twitter_feed',
copy_options=['COMPUPDATE OFF', 'STATUPDATE OFF', 'TRUNCATECOLUMNS']
)
stage_happiness = S3ToRedshiftTransfer(
task_id='stage_happiness_to_redshift',
schema='{{ params.redshift_schema }}',
table='staging_happiness',
s3_bucket='{{ params.s3_bucket }}',
s3_key='happiness'
)
stage_temperature = S3ToRedshiftTransfer(
task_id='stage_temperature_to_redshift',
schema='{{ params.redshift_schema }}',
from datetime import datetime
from airflow.sensors.s3_key_sensor import S3KeySensor
from airflow.operators.s3_to_redshift_operator import S3ToRedshiftTransfer
from airflow.models import DAG
args = {
'owner': 'Adil',
'start_date': datetime(2019, 6, 20),
'retries': 1,
}
with DAG(dag_id='nyc_taxi_to_redshift',
default_args=args,
schedule_interval=None) as dag:
wait_for_s3_file = S3KeySensor(bucket_name='mktg-redshift-exchange',
bucket_key='nyc-taxi/temp-taxi-data',
wildcard_match=False,
dag=dag)
upload_to_redshift = S3ToRedshiftTransfer(
schema='public',
table='temp-taxi-data',
s3_bucket='mktg-redshift-exchange',
s3_key='nyc-taxi',
copy_options=['CSV', 'IGNOREHEADER 2'])
wait_for_s3_file >> upload_to_redshift
'provide_context': True
}
# Initialize the DAG
# Concurrency --> Number of tasks allowed to run concurrently
dag = DAG('test_dag1',
concurrency=3,
schedule_interval=None,
default_args=default_args)
# Creates an EMR cluster
s3_to_redshift = S3ToRedshiftTransfer(task_id="s3_to_redshift",
redshift_conn_id="my_redshift",
aws_conn_id="my_conn_s3",
table="output",
s3_bucket="bsjun-test1",
schema="public",
s3_key="results",
copy_options=["delimiter ','"],
verify=True,
dag=dag)
# Define the individual tasks using Python Operators
remove_files = BashOperator(
task_id='remove_files',
bash_command='echo 1',
dag=dag,
)
# construct the DAG by setting the dependencies
s3_to_redshift >> remove_files
job_flow_id=
"{{ task_instance.xcom_pull('create_emr_cluster', key='return_value') }}",
aws_conn_id='aws_default',
steps=SPARK_TEST_STEPS,
dag=dag)
step_checker = EmrStepSensor(
task_id='watch_step',
job_flow_id=
"{{ task_instance.xcom_pull('create_emr_cluster', key='return_value') }}",
step_id="{{ task_instance.xcom_pull('add_steps', key='return_value')[0] }}",
aws_conn_id='aws_default',
dag=dag)
cluster_remover = EmrTerminateJobFlowOperator(
task_id='remove_cluster',
job_flow_id=
"{{ task_instance.xcom_pull('create_emr_cluster', key='return_value') }}",
aws_conn_id='aws_default',
dag=dag)
copy_agg_to_redshift = S3ToRedshiftTransfer(task_id='copy_to_redshift',
schema='nyc',
table='agg_green_rides',
s3_bucket=S3_BUCKET_NAME,
s3_key='aggregate/agg-green-rides',
dag=dag)
# construct the DAG by setting the dependencies
s3_sensor >> aws_glue_task >> cluster_creator >> step_adder >> step_checker >> cluster_remover >> copy_agg_to_redshift
task_id='transform_weather_data',
bash_command=
'python3 "${AIRFLOW_HOME}/dags/scripts/transform_weather_data.py"',
dag=dag)
transform_complaint_data = BashOperator(
task_id='transform_complaint_data',
bash_command=
'python3 "${AIRFLOW_HOME}/dags/scripts/transform_complaint_data.py"',
dag=dag)
load_weather_data = S3ToRedshiftTransfer(
task_id='load_weather_data',
schema='public',
table='dim_weather',
s3_bucket=Variable.get('aws_bucket'),
s3_key='processed',
redshift_conn_id='redshift_conn',
aws_conn_id='aws_credentials',
copy_options=['csv', "IGNOREHEADER 1"],
dag=dag)
load_demo_data = S3ToRedshiftTransfer(task_id='load_demo_data',
schema='public',
table='dim_demographics',
s3_bucket=Variable.get('aws_bucket'),
s3_key='processed',
redshift_conn_id='redshift_conn',
aws_conn_id='aws_credentials',
copy_options=['csv', 'IGNOREHEADER 1'],
dag=dag)
'standardize_countries.py',
dag=dag)
upload_raw_data = BashOperator(task_id='upload_raw_data_to_s3',
bash_command=pybash + 'push_to_s3.py',
dag=dag)
create_tables = PostgresOperator(task_id='create_tables',
sql=SqlQueries.create_tables,
dag=dag)
stage_tweets = S3ToRedshiftTransfer(task_id='stage_tweets_to_redshift',
schema='public',
table='staging_tweets',
s3_bucket='udacity-capstone-cg',
s3_key='staging',
copy_options=[
'CSV', 'IGNOREHEADER 1', 'FILLRECORD',
'COMPUPDATE OFF', 'STATUPDATE OFF',
'TRUNCATECOLUMNS'
],
dag=dag)
stage_sentiment = S3ToRedshiftTransfer(task_id='stage_sentiment_to_redshift',
schema='public',
table='sentiment',
s3_bucket='udacity-capstone-cg',
s3_key='staging',
copy_options=[
'CSV', 'IGNOREHEADER 1',
'FILLRECORD', 'COMPUPDATE OFF',
'STATUPDATE OFF', 'TRUNCATECOLUMNS'
sql='sql/ddl/create_tbl_daily_exchange_rates_pre.sql',
dag=dag)
# create empty staging table to load columnar formatted data into
create_postgres_staging = PostgresOperator(
task_id='create_postgres_staging',
postgres_conn_id=POSTGRES_CONN_ID,
sql='sql/ddl/create_tbl_daily_exchange_rates_stg.sql',
dag=dag)
# populate first staging table with new data
s3_to_postgres_pre_staging = S3ToRedshiftTransfer(
task_id='s3_to_postgres_pre_staging',
aws_conn_id='s3_conn_id',
s3_bucket=S3_BUCKET_NAME,
s3_key=s3_key,
redshift_conn_id=POSTGRES_CONN_ID,
schema='alphavantage',
table='daily_exchange_rates_pre_staging',
dag=dag)
# transform json data using psql to correct table structure
load_to_postgres_staging = PostgresOperator(
task_id='load_to_postgres_staging',
postgres_conn_id=POSTGRES_CONN_ID,
sql='sql/load_to_daily_exchange_rates_stg.sql',
dag=dag)
# load only incremental data from staging into main table
load_to_postgres = PostgresOperator(task_id='load_to_postgres',
postgres_conn_id=POSTGRES_CONN_ID,