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# --------------------------------------------------------------------------
#
# Copyright (c) Microsoft Corporation. All rights reserved.
#
# The MIT License (MIT)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the ""Software""), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#
# --------------------------------------------------------------------------
"""
FILE: sample_code_schemaregistry_async.py
DESCRIPTION:
This sample demonstrates asynchronously authenticating the SchemaRegistryClient and registering a schema,
retrieving a schema by its ID, retrieving a schema by its version, and retrieving schema properties.
USAGE:
python sample_code_schemaregistry_async.py
Set the environment variables with your own values before running the sample:
1) SCHEMAREGISTRY_FULLY_QUALIFIED_NAMESPACE - The schema registry fully qualified namespace,
which should follow the format: `<your-namespace>.servicebus.windows.net`
2) SCHEMAREGISTRY_GROUP - The name of the schema group.
This example uses the async DefaultAzureCredential, which requests a token from Azure Active Directory.
For more information on the async DefaultAzureCredential, see
https://learn.microsoft.com/python/api/overview/azure/identity-readme?view=azure-python#defaultazurecredential.
"""
import os
import asyncio
import json
from azure.schemaregistry.aio import SchemaRegistryClient
from azure.identity.aio import DefaultAzureCredential
def create_client():
# [START create_sr_client_async]
SCHEMAREGISTRY_FQN = os.environ["SCHEMAREGISTRY_AVRO_FULLY_QUALIFIED_NAMESPACE"]
token_credential = DefaultAzureCredential()
schema_registry_client = SchemaRegistryClient(
fully_qualified_namespace=SCHEMAREGISTRY_FQN, credential=token_credential
)
# [END create_sr_client_async]
return schema_registry_client, token_credential
async def register_schema(schema_registry_client):
# [START register_schema_async]
GROUP_NAME = os.environ["SCHEMAREGISTRY_GROUP"]
NAME = "your-schema-name"
FORMAT = "Avro"
SCHEMA_JSON = {
"namespace": "example.avro",
"type": "record",
"name": "User",
"fields": [
{"name": "name", "type": "string"},
{"name": "favorite_number", "type": ["int", "null"]},
{"name": "favorite_color", "type": ["string", "null"]},
],
}
DEFINITION = json.dumps(SCHEMA_JSON, separators=(",", ":"))
schema_properties = await schema_registry_client.register_schema(GROUP_NAME, NAME, DEFINITION, FORMAT)
schema_id = schema_properties.id
# [END register_schema_async]
return schema_properties
async def get_schema(schema_registry_client, schema_id):
# [START get_schema_async]
schema = await schema_registry_client.get_schema(schema_id)
definition = schema.definition
properties = schema.properties
# [END get_schema_async]
print(definition)
print(properties)
return definition
async def get_schema_by_version(schema_registry_client, version):
# [START get_schema_by_version_async]
group_name = os.environ["SCHEMAREGISTRY_GROUP"]
name = "your-schema-name"
schema = await schema_registry_client.get_schema(group_name=group_name, name=name, version=version)
definition = schema.definition
properties = schema.properties
# [END get_schema_by_version_async]
print(definition)
print(properties)
return schema
async def get_old_schema_by_version(schema_registry_client):
GROUP_NAME = os.environ["SCHEMAREGISTRY_GROUP"]
NAME = "your-schema-name"
FORMAT = "Avro"
NEW_SCHEMA_JSON = {
"namespace": "example.avro",
"type": "record",
"name": "User2",
"fields": [
{"name": "name", "type": "string"},
{"name": "favorite_number", "type": ["int", "null"]},
{"name": "favorite_color", "type": ["string", "null"]},
],
}
NEW_DEFINITION = json.dumps(NEW_SCHEMA_JSON, separators=(",", ":"))
updated_schema_properties = await schema_registry_client.register_schema(GROUP_NAME, NAME, NEW_DEFINITION, FORMAT)
print(f"Updated schema v{updated_schema_properties.version}: {NEW_SCHEMA_JSON}")
old_version = updated_schema_properties.version - 1
schema = await schema_registry_client.get_schema(group_name=GROUP_NAME, name=NAME, version=old_version)
print(f"Retrieving old schema v{schema.properties.version}: {schema.definition}")
return schema
async def get_schema_id(schema_registry_client):
# [START get_schema_id_async]
group_name = os.environ["SCHEMAREGISTRY_GROUP"]
name = "your-schema-name"
format = "Avro"
schema_json = {
"namespace": "example.avro",
"type": "record",
"name": "User",
"fields": [
{"name": "name", "type": "string"},
{"name": "favorite_number", "type": ["int", "null"]},
{"name": "favorite_color", "type": ["string", "null"]},
],
}
definition = json.dumps(schema_json, separators=(",", ":"))
schema_properties = await schema_registry_client.get_schema_properties(group_name, name, definition, format)
schema_id = schema_properties.id
# [END get_schema_id_async]
return schema_id
async def main():
client, credential = create_client()
async with client, credential:
schema_properties = await register_schema(client)
schema = await get_schema(client, schema_properties.id)
schema = await get_schema_by_version(client, schema_properties.version)
schema = await get_old_schema_by_version(client)
schema_id = await get_schema_id(client)
if __name__ == "__main__":
asyncio.run(main())
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