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| 1 | +#!/usr/bin/env python |
| 2 | +# -*- coding: utf-8 -*- |
| 3 | +# |
| 4 | +# Copyright 2024 Confluent Inc. |
| 5 | +# |
| 6 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | +# you may not use this file except in compliance with the License. |
| 8 | +# You may obtain a copy of the License at |
| 9 | +# |
| 10 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | +# |
| 12 | +# Unless required by applicable law or agreed to in writing, software |
| 13 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | +# See the License for the specific language governing permissions and |
| 16 | +# limitations under the License. |
| 17 | + |
| 18 | + |
| 19 | +# A simple example demonstrating use of AvroDeserializer. |
| 20 | + |
| 21 | +import argparse |
| 22 | + |
| 23 | +from confluent_kafka.schema_registry.rules.encryption.encrypt_executor import \ |
| 24 | + FieldEncryptionExecutor |
| 25 | + |
| 26 | +from confluent_kafka.schema_registry.rules.encryption.localkms.local_driver import \ |
| 27 | + LocalKmsDriver |
| 28 | + |
| 29 | +from confluent_kafka.schema_registry.rules.encryption.hcvault.hcvault_driver import \ |
| 30 | + HcVaultKmsDriver |
| 31 | + |
| 32 | +from confluent_kafka.schema_registry.rules.encryption.gcpkms.gcp_driver import \ |
| 33 | + GcpKmsDriver |
| 34 | + |
| 35 | +from confluent_kafka.schema_registry.rules.encryption.azurekms.azure_driver import \ |
| 36 | + AzureKmsDriver |
| 37 | + |
| 38 | +from confluent_kafka.schema_registry.rules.encryption.awskms.aws_driver import \ |
| 39 | + AwsKmsDriver |
| 40 | + |
| 41 | +from confluent_kafka import Consumer |
| 42 | +from confluent_kafka.serialization import SerializationContext, MessageField |
| 43 | +from confluent_kafka.schema_registry import SchemaRegistryClient |
| 44 | +from confluent_kafka.schema_registry.avro import AvroDeserializer |
| 45 | + |
| 46 | + |
| 47 | +class User(object): |
| 48 | + """ |
| 49 | + User record |
| 50 | +
|
| 51 | + Args: |
| 52 | + name (str): User's name |
| 53 | +
|
| 54 | + favorite_number (int): User's favorite number |
| 55 | +
|
| 56 | + favorite_color (str): User's favorite color |
| 57 | + """ |
| 58 | + |
| 59 | + def __init__(self, name=None, favorite_number=None, favorite_color=None): |
| 60 | + self.name = name |
| 61 | + self.favorite_number = favorite_number |
| 62 | + self.favorite_color = favorite_color |
| 63 | + |
| 64 | + |
| 65 | +def dict_to_user(obj, ctx): |
| 66 | + """ |
| 67 | + Converts object literal(dict) to a User instance. |
| 68 | +
|
| 69 | + Args: |
| 70 | + obj (dict): Object literal(dict) |
| 71 | +
|
| 72 | + ctx (SerializationContext): Metadata pertaining to the serialization |
| 73 | + operation. |
| 74 | + """ |
| 75 | + |
| 76 | + if obj is None: |
| 77 | + return None |
| 78 | + |
| 79 | + return User(name=obj['name'], |
| 80 | + favorite_number=obj['favorite_number'], |
| 81 | + favorite_color=obj['favorite_color']) |
| 82 | + |
| 83 | + |
| 84 | +def main(args): |
| 85 | + # Register the KMS drivers and the field-level encryption executor |
| 86 | + AwsKmsDriver.register() |
| 87 | + AzureKmsDriver.register() |
| 88 | + GcpKmsDriver.register() |
| 89 | + HcVaultKmsDriver.register() |
| 90 | + LocalKmsDriver.register() |
| 91 | + FieldEncryptionExecutor.register() |
| 92 | + |
| 93 | + topic = args.topic |
| 94 | + |
| 95 | + # When using Data Contract rules, a schema should not be passed to the |
| 96 | + # AvroDeserializer. The schema is fetched from the Schema Registry. |
| 97 | + schema_str = None |
| 98 | + |
| 99 | + sr_conf = {'url': args.schema_registry} |
| 100 | + schema_registry_client = SchemaRegistryClient(sr_conf) |
| 101 | + |
| 102 | + avro_deserializer = AvroDeserializer(schema_registry_client, |
| 103 | + schema_str, |
| 104 | + dict_to_user) |
| 105 | + |
| 106 | + consumer_conf = {'bootstrap.servers': args.bootstrap_servers, |
| 107 | + 'group.id': args.group, |
| 108 | + 'auto.offset.reset': "earliest"} |
| 109 | + |
| 110 | + consumer = Consumer(consumer_conf) |
| 111 | + consumer.subscribe([topic]) |
| 112 | + |
| 113 | + while True: |
| 114 | + try: |
| 115 | + # SIGINT can't be handled when polling, limit timeout to 1 second. |
| 116 | + msg = consumer.poll(1.0) |
| 117 | + if msg is None: |
| 118 | + continue |
| 119 | + |
| 120 | + user = avro_deserializer(msg.value(), SerializationContext(msg.topic(), MessageField.VALUE)) |
| 121 | + if user is not None: |
| 122 | + print("User record {}: name: {}\n" |
| 123 | + "\tfavorite_number: {}\n" |
| 124 | + "\tfavorite_color: {}\n" |
| 125 | + .format(msg.key(), user.name, |
| 126 | + user.favorite_number, |
| 127 | + user.favorite_color)) |
| 128 | + except KeyboardInterrupt: |
| 129 | + break |
| 130 | + |
| 131 | + consumer.close() |
| 132 | + |
| 133 | + |
| 134 | +if __name__ == '__main__': |
| 135 | + parser = argparse.ArgumentParser(description="AvroDeserializer example") |
| 136 | + parser.add_argument('-b', dest="bootstrap_servers", required=True, |
| 137 | + help="Bootstrap broker(s) (host[:port])") |
| 138 | + parser.add_argument('-s', dest="schema_registry", required=True, |
| 139 | + help="Schema Registry (http(s)://host[:port]") |
| 140 | + parser.add_argument('-t', dest="topic", default="example_serde_avro", |
| 141 | + help="Topic name") |
| 142 | + parser.add_argument('-g', dest="group", default="example_serde_avro", |
| 143 | + help="Consumer group") |
| 144 | + |
| 145 | + main(parser.parse_args()) |
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