feat(dispatch aws plugin): adds support for decompressing zlib compressed signals

[mvilanova]

Summary of Changes in plugin.py

Imports

• Added imports for base64 and zlib.
• Reordered imports for better organization.

New Function

• Added a new function decompress_json to handle decompression of base64 encoded zlibbed JSON strings.

def decompress_json(compressed_str: str) -> str:
    """Decompress a base64 encoded zlibbed JSON string."""
    decoded = base64.b64decode(compressed_str)
    decompressed = zlib.decompress(decoded)
    return decompressed.decode("utf-8")

Class AWSSQSSignalConsumerPlugin

• Updated the description attribute for better readability.
• Added logic to handle decompression of messages if they are marked as compressed with zlib.
• Improved logging messages for better clarity and consistency.

Detailed Changes

• Description Update: Changed description from "Uses sqs to consume signals" to "Uses SQS to consume signals."
• Message Handling: Added logic to check for a compressed attribute in MessageAttributes and decompress the message body if necessary.
• Logging Improvements: Enhanced log messages to be more descriptive and consistent.

if message_attributes.get("compressed", {}).get("StringValue") == "zlib":
    # Message is compressed, decompress it
    message_body = decompress_json(message_body)

• Error Handling: Improved error messages for ValidationError, IntegrityError, and general exceptions to provide more context.

log.warning(
    f"Received a signal instance that does not conform to the `SignalInstanceCreate` structure. Skipping creation: {e}"
)
log.info(
    f"Received a signal instance that already exists in the database. Skipping creation: {signal_instance_in.raw['id']}"
)
log.exception(
    f"Encountered an Integrity error when trying to create a signal instance: {e}"
)
log.exception(f"Unable to create signal instance: {e}")

• Signal Logging: Updated log message for received signals to include both the signal name and ID.

log.debug(
    f"Received a signal with name {signal_instance.signal.name} and id {signal_instance.signal.id}"
)

These changes enhance the functionality of the AWSSQSSignalConsumerPlugin by adding support for compressed messages and improving the clarity and consistency of log messages.