syngenta-digital-dta 0.0.45

A DRY multi-database normalizer.

Syngenta Digital DTA (Database Adapter)

A DRY multi-database normalizer.

Features

• Use the same package with multiple database engines
• Able to validate your data against predefined schema in code (for no-schemas solutions)
• Creates easy pub-sub architecture based on model changes
• Local development support

Philosophy

The dta philosophy is to use one pattern with multiple databases

The dta encourages pub-sub architecture by allowing for the automatic publishing of data over SNS.

Installation

This is a python module available through the pypi registry.

Before installing, download and install python. python 3 or higher is required.

Installation is done using the pip install command:

$ pip install syngenta_digital_dta

or

$ pipenv install syngenta_digital_dta

Common Usage: DynamoDB

import os
import syngenta_digital_dta

adapter = syngenta_digital_dta.adapter(
    engine='dynamodb',
    table=os.getenv('DYNAMODB_TABLE'),
    endpoint='http://localhost:4000',
    model_schema='v1-table-model',
    model_schema_file='application/openapi.yml',
    model_identifier='test_id',
    model_version_key='modified'
)

Initialize Options

Option Name	Required	Type	Description
engine	true	string	name of supported db engine (dynamodb)
table	true	string	name of dynamodb table
endpoint	false	string	url of the dynamodb table (useful for local development)
model_schema	true	string	key of openapi schema this is being set against
model_schema_file	true	string	path where your schema file can found (accepts JSON as well)
model_identifier	true	string	unique identifier key on the model
model_version_key	true	string	key that can be used as a version key (modified timestamps often suffice)
author_identifier	false	string	unique identifier of the author who made the change (optional)
sns_arn	false	string	sns topic arn you want to broadcast the changes to
sns_attributes	false	dict	custom attributes in dict format; values should only be strings or numbers
sns_default_attributes	false	boolean	determines if default sns attributes are included in sns message (model_identifier, model_version_key, model_schema, author_identifier)

Examples

DynamoDB Create

result = adapter.create(
	operation='insert', # or overwrite (optional); defaults to insert
	data=some_dict_to_insert_into_the_table,
)

result = adapter.insert(data=some_dict_to_insert_into_the_table) # alias

DynamoDB Read

result = adapter.read(
    operation='get', # or query or scan (optional); defaults to get
	query={
	   'Key': {
	        'example_id': '3'
	   }
    }
)

result = adapter.get(
	query={
	   'Key': {
	        'example_id': '3'
	   }
    }
)

results = adapter.read(
    operation='query',
    query={
        'IndexName': 'test_query_id',
        'Limit': 1,
        'KeyConditionExpression': 'test_query_id = :test_query_id',
        'ExpressionAttributeValues': {
            ':test_query_id': 'def345'
        }
    }
)

DynamoDB Update

result = adapter.update(
	data=some_dict_to_update_the_model,
	operation='get',
	query={
	   'Key': {
	        'example_id': '3'
	   }
    }
)

DynamoDB Delete

result = adapter.delete(
	query={
	   'Key': {
	        'example_id': '3'
	   }
    }
)

Common Usage: Postgres & Redshift

import os
import syngenta_digital_dta

adapter = syngenta_digital_dta.adapter(
    engine='postgres', # or redshift
    table='users',
    endpoint='localhost',
    database='dta',
    port=5439, # 5432 for redshift
    user=os.getenv('POSTGRES_USER'),
    password=os.getenv('POSTGRES_PASSWORD'),
    model_schema='test-postgres-user-model',
    model_schema_file='tests/openapi.yml',
    model_identifier='user_id',
    model_version_key='modified',
    relationships={
        'addresses': 'user_id'
    }
)

Initialize Options

Option Name	Required	Type	Description
engine	true	string	name of supported db engine (dynamodb)
table	true	string	name of postgres table to work as primary query point
endpoint	true	string	url of the postgres cluster
database	true	string	name of the database to connect to
port	true	int	port of database (defaults to 5439)
user	true	string	username for database access
password	true	string	password for database access
model_schema	true	string	key of openapi schema this is being set against
model_schema_file	true	string	path where your schema file can found (accepts JSON as well)
model_identifier	true	string	unique identifier key on the model
model_version_key	true	string	key that can be used as a version key (modified timestamps often suffice)
autocommit	false	boolean	will commit transactions automatically without direct call
relationships	false	dict	key is the table with the relationship and value is the foreign key on that table (assumes your primary key name is equal to that table's foreign key)
author_identifier	false	string	unique identifier of the author who made the change (optional)
sns_arn	false	string	sns topic arn you want to broadcast the changes to
sns_attributes	false	dict	custom attributes in dict format; values should only be strings or numbers
sns_default_attributes	false	boolean	determines if default sns attributes are included in sns message (model_identifier, model_version_key, model_schema, author_identifier)[default: true]

Examples

Postgres/Reshift Connect

# will always pool and share connections
self.user_adapter.connect()

Postgres/Reshift Create

data = {
    'user_id': str(uuid.uuid4()),
    'email': '[e-mail]',
    'first': 'Some',
    'last': 'User'
}
result = self.user_adapter.create(data=data, commit=True)
result = self.user_adapter.insert(data=data, commit=True) # alias

Postgres/Reshift Update

data = {
    'user_id': 'some-update-guid',
    'email': '[e-mail]',
    'first': 'Some',
    'last': 'User'
}
result = self.user_adapter.update(data=data, commit=True)

Postgres/Reshift Upsert

data = {
    'user_id': 'some-update-guid',
    'email': '[e-mail]',
    'first': 'Some',
    'last': 'User'
}
result = self.user_adapter.upsert(data=data, commit=True)

Postgres/Reshift Delete

self.user_adapter.delete('some-delete-guid', commit=True)

Postgres/Reshift Read

# will only return 1 row or None
result = self.user_adapter.read('some-read-guid')
result = self.user_adapter.get('some-read-guid') # alias

# all fields optional (defaults to SELECT * FROM {table} ORDER BY {model_identifier} ASC LIMIT 1000)
results = self.user_adapter.read_all(
    where={
        'first': 'first',
        'last': 'last',
    },
    limit=2,
    offset=1,
    orderby_column='first',
    orderby_sort='DESC'
)

# limited to get 1 relationship at a time
results = self.user_adapter.get_relationship('addresses', where={'user_id': 'some-user-relationship-guid'})

# only will allow read-only operations
# query and params are required; params can be empty dict
results = self.user_adapter.query(
    query='SELECT * FROM users WHERE user_id = %(identifier_value)s',
    params={
        'identifier_value':'some-query-relationship-guid'
    }
)

Common Usage: Elasticsearch

import os
import syngenta_digital_dta

# localhost connection
adapter = syngenta_digital_dta.adapter(
    engine='elasticsearch',
    index='users',
    endpoint='localhost',
    model_schema='test-elasticsearch-user-model',
    model_schema_file='tests/openapi.yml',
    model_identifier='user_id',
    model_version_key='modified'
)

# lambda connection (assumes lambda role has access)
adapter = syngenta_digital_dta.adapter(
    engine='elasticsearch',
    index='users',
    endpoint='localhost',
    model_schema='test-elasticsearch-user-model',
    model_schema_file='tests/openapi.yml',
    model_identifier='user_id',
    model_version_key='modified',
    authentication='lambda'
)

# traditional user password connection
adapter = syngenta_digital_dta.adapter(
    engine='elasticsearch',
    index='users',
    endpoint='localhost',
    model_schema='test-elasticsearch-user-model',
    model_schema_file='tests/openapi.yml',
    model_identifier='user_id',
    model_version_key='modified',
    authentication='user-password',
    user='root',
    password='root'
)

Initialize Options

Option Name	Required	Type	Description
engine	true	string	name of supported db engine (dynamodb)
index	true	string	name of postgres table to work as primary query point
endpoint	true	string	url of the postgres cluster
model_schema	true	string	key of openapi schema this is being set against
model_schema_file	true	string	path where your schema file can found (accepts JSON as well)
model_identifier	true	string	unique identifier key on the model
model_version_key	true	string	key that can be used as a version key (modified timestamps often suffice)
port	false	int	port of database (defaults to 9200 if localhost or 443 if not)
author_identifier	false	string	unique identifier of the author who made the change (optional)
authentication	false	string	either 'lamnbda' or 'user-password'
user	false	string	only needed if authentication is user-password
password	false	string	only needed if authentication is user-password
sns_arn	false	string	sns topic arn you want to broadcast the changes to
sns_attributes	false	dict	custom attributes in dict format; values should only be strings or numbers
sns_default_attributes	false	boolean	determines if default sns attributes are included in sns message (model_identifier, model_version_key, model_schema, author_identifier) [default: true]

Elasticsearch Connection

# elasticsearch is auto-connected to a shared connection; use this to test that connection
self.adapter.connection.ping()

Elasticsearch Set-up

# will convert openapi schema, defined in init, to a mapping
self.adapter.create_template(
    name='users',
    index_patterns='users-*',
    special={'phone': 'keyword'} # (optional) can send mapping of special types otherwise will default based on schema type
)

# will use sensible defaults or you can pass in a custom settings kwargs['settings']
self.adapter.create_index(settings=some_optional_settings)

OpenAPI Default Conversion

OpenAPI Type	Elasticsearch Mapping
array	none (not needed to be included)
array of objects	nested
boolean	boolean
integer	integer
number	long
object (with properties)	object
object (without properties)	flattened
string (no format)	text
string (format date)	date (with iso date format acceptance)
string (format date-time)	date (with iso date format acceptance)
string (format email)	text (with url email analyzer)
string (format ip)	ip
string (format hostname)	text (with url email analyzer)
string (format iri)	text (with url email analyzer)
string (format url)	text (with url email analyzer)

Elasticsearch Create

data = {
    'user_id': uuid.uuid4().hex,
    'email': '[e-mail]',
    'first': 'Some',
    'last': 'User',
    'phone': 1112224444
}
self.adapter.create(data=data, refresh=True) # (optional) refresh defaults to True

Elasticsearch Update

updated_data = {
    'user_id': user_id,
    'email': '[e-mail]',
    'first': 'Peter'
}
self.adapter.update(data=updated_data, refresh=True) # (optional) refresh defaults to True

Elasticsearch Upsert

data = {
    'user_id': upsert_id,
    'email': '[e-mail]',
    'first': 'Some',
    'last': 'User',
    'phone': 1112224444
}
self.adapter.upsert(data=data, refresh=True) # (optional) refresh defaults to True

Elasticsearch Delete

self.adapter.delete(delete_id, refresh=True) # (optional) refresh defaults to True

Elasticsearch Read

response = self.adapter.get(get_id)

# returns single dictionary mapped to openapi model defined in init (or empty dict)
dict_response = self.adapter.get(get_id, normalize=True) # (optional) normalize defaults to False

# returns list of dictionaries mapped to openapi model defined in init (or empty array)
list_response = self.adapter.query(
    normalize=True, # (optional) normalize defaults to False
    query={
        'match': {
            'first': 'Normal'
        }
    }
)

Common Usage: S3

adapter = syngenta_digital_dta.adapter(
    engine='s3',
    endpoint=self.endpoint,
    bucket=self.bucket
)

Initialize Options

Option Name	Required	Type	Description
engine	true	string	name of supported db engine (s3)
bucket	true	string	name of bucket you are interfacing with
endpoint	true	string	url of the s3 endpoint (useful for local development)
sns_arn	false	string	sns topic arn you want to broadcast the changes to
sns_attributes	false	dict	custom attributes in dict format; values should only be strings or numbers

NOTE: If you use the SNS functionality, all SNS messages are sent presigned urls for S3, not the actual data itself given the SNS message size limitations. Below is an an example payload:

{
    "presigned_url": "https://some-s3-url"
}

S3 Create (Single)

# automatically converts dicts to json with flag
adapter.create(
    s3_path='test/test-create.json',
    data={'test': True},
    json=True
)

S3 Create (Multipart)

file = open('./tests/mock/example.json')
chunks = []
for piece in iter(file.read(6000000), ''):
    chunks.append(piece)
adapter.multipart_upload(chunks=chunks, s3_path='test/test-create.json')

S3 Create (Stream)

url = 'https://github.com/syngenta-digital/package-python-dta/archive/refs/heads/master.zip'
response = requests.get(url, stream=True)
self.adapter.upload_stream(data=response.content, s3_path='test/code-clone.zip')

S3 Create (Pre-Signed UPLOAD URLs)

presigned_upload_url = adapter.create_presigned_post_url(s3_path='test/test-create.json', expiration=3600)

S3 Read (In Memory)

# automatically converts json to dict with flag
result = adapter.read(
    s3_path='test/test-create.json',
    json=True
)

S3 Read (Download to Disk)

# automatically creates directory and child directories
file_path = adapter.download(s3_path='test/test-create.json', download_path='/tmp/unit-test-download/test.json')

S3 Read (Pre-Signed URLs)

presigned_url = adapter.create_presigned_read_url(s3_path='test/test-create.json', expiration=3600)

S3 Delete

adapter.delete(s3_path='test/test-create.json')

Contributing

If you would like to contribute please make sure to follow the established patterns and unit test your code:

Local Unit Testing

• In one tab, run pipenv run local
• In a second tab, run RUN_MODE=unittest python -m unittest discover