amgi-sqs-event-source-mapping 0.45.0

AMGI SQS event source mapping handler

amgi-sqs-event-source-mapping

amgi-sqs-event-source-mapping is an adaptor for AMGI applications to run in an SQS event source mapped Lambda.

Installation

pip install amgi-sqs-event-source-mapping==0.45.0

Example

This example uses AsyncFast:

from dataclasses import dataclass

from amgi_sqs_event_source_mapping import SqsEventSourceMappingHandler
from asyncfast import AsyncFast

app = AsyncFast()


@dataclass
class Order:
    item_ids: list[str]


@app.channel("order-queue")
async def order_queue(order: Order) -> None:
    # Makes an order
    ...


handler = SqsEventSourceMappingHandler(app)

What it does

• Converts SQS batch events into AMGI message.receive events
• Uses the SQS queue name as the AMGI message address
• Supports partial batch failures so only failed messages are retried
• Sends outbound messages back to SQS efficiently using batching
• Optionally manages application startup and shutdown via AMGI lifespan
• Verifies message integrity using the SQS-provided MD5 checksum and retries corrupted messages

Record handling

• Record bodies are passed to your app as bytes
• SQS record attributes become AMGI headers
• Records are only acknowledged when your app emits message.ack
• Records that are not acknowledged are treated as failures and will be retried
• Corrupted messages are detected automatically and retried

Lifespan

Lifespan support is enabled by default.

• Startup runs once per Lambda execution environment
• Shutdown is attempted when the environment is terminated

Shutdown handling relies on signal.SIGTERM, which is supported by Python 3.12 and later Lambda runtimes.

To use fully stateless, per-invocation behavior, disable lifespan:

handler = SqsEventSourceMappingHandler(app, lifespan=False)

Contact

For questions or suggestions, please contact [e-mail].

License

Copyright 2025 AMGI