115 lines
3.0 KiB
Python
115 lines
3.0 KiB
Python
from typing import Any, Generator
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import boto3
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import jsonlines
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from elasticsearch import Elasticsearch
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from layercake.dynamodb import deserialize
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from tqdm import tqdm
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elastic_client = Elasticsearch('http://127.0.0.1:9200')
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dynamodb_client = boto3.client('dynamodb', endpoint_url='http://127.0.0.1:8000')
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jsonl_files = (
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'test-orders.jsonl',
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'test-users.jsonl',
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'test-enrollments.jsonl',
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'test-courses.jsonl',
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)
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def put_item(item: dict, table_name: str, /, dynamodb_client) -> bool:
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try:
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dynamodb_client.put_item(
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TableName=table_name,
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Item=item,
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)
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except Exception:
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return False
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else:
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return True
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def scan_table(table_name: str, /, dynamodb_client, **kwargs) -> Generator:
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try:
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r = dynamodb_client.scan(TableName=table_name, **kwargs)
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except Exception:
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yield from ()
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else:
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for item in r['Items']:
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yield deserialize(item)
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if 'LastEvaluatedKey' in r:
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yield from scan_table(
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table_name,
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dynamodb_client=dynamodb_client,
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ExclusiveStartKey=r['LastEvaluatedKey'],
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)
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class Elastic:
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def __init__(self, client: Elasticsearch) -> None:
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self.client = client
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def index_item(
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self,
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/,
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id: str,
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index: str,
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doc: dict,
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):
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return self.client.index(
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index=index,
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id=id,
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document=_serialize_to_basic_types(doc),
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)
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def delete_index(self, index: str) -> bool:
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try:
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self.client.indices.delete(index=index)
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except Exception:
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return False
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else:
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return True
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def _serialize_to_basic_types(value: Any) -> Any:
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if isinstance(value, dict):
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return {k: _serialize_to_basic_types(v) for k, v in value.items()}
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if isinstance(value, set):
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return list(value)
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if isinstance(value, list):
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return [_serialize_to_basic_types(v) for v in value]
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return value
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if __name__ == '__main__':
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elastic = Elastic(elastic_client)
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# Populate DynamoDB tables with data from JSONL files
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for file in tqdm(jsonl_files, desc='Processing files'):
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with jsonlines.open(f'seeds/{file}') as lines:
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table_name = file.removesuffix('.jsonl')
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reader = jsonlines.Reader(fp)
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for line in tqdm(lines, desc=f'Processing lines in {file}'):
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put_item(line, table_name, dynamodb_client)
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# Scan DynamoDB tables and index the data into Elasticsearch
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for file in tqdm(jsonl_files, desc='Scanning tables'):
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table_name = file.removesuffix('.jsonl')
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elastic.delete_index(table_name)
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for doc in tqdm(
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scan_table(
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table_name,
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dynamodb_client,
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FilterExpression='sk = :sk',
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ExpressionAttributeValues={':sk': {'S': '0'}},
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),
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desc=f'Indexing {table_name}',
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):
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elastic.index_item(id=doc['id'], index=table_name, doc=doc)
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