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How to use parse_batch_item_failures method in localstack

Best Python code snippet using localstack_python

sqs_event_source_listener.py

Source:sqs_event_source_listener.py

...105            if report_partial_failures:106                valid_message_ids = [r["messageId"] for r in records]107                # collect messages to delete (= the ones that were processed successfully)108                try:109                    if messages_to_keep := parse_batch_item_failures(110                        result, valid_message_ids=valid_message_ids111                    ):112                        # unless there is an exception or the parse result is empty, only delete those messages that113                        # are not part of the partial failure report.114                        messages_to_delete = [115                            message_id116                            for message_id in valid_message_ids117                            if message_id not in messages_to_keep118                        ]119                    else:120                        # otherwise delete all messages121                        messages_to_delete = valid_message_ids122                    LOG.debug(123                        "Lambda partial SQS batch failure report: ok=%s, failed=%s",124                        messages_to_delete,125                        messages_to_keep,126                    )127                except Exception as e:128                    LOG.error(129                        "Error while parsing batchItemFailures from lambda response %s: %s. "130                        "Treating the batch as complete failure.",131                        result.result,132                        e,133                    )134                    return135                entries = [136                    {"Id": r["receiptHandle"], "ReceiptHandle": r["receiptHandle"]}137                    for r in records138                    if r["messageId"] in messages_to_delete139                ]140            else:141                entries = [142                    {"Id": r["receiptHandle"], "ReceiptHandle": r["receiptHandle"]} for r in records143                ]144            try:145                sqs_client.delete_message_batch(QueueUrl=queue_url, Entries=entries)146            except Exception as e:147                LOG.info(148                    "Unable to delete Lambda events from SQS queue "149                    + "(please check SQS visibility timeout settings): %s - %s" % (entries, e)150                )151        for msg in messages:152            message_attrs = message_attributes_to_lower(msg.get("MessageAttributes"))153            record = {154                "body": msg.get("Body", "MessageBody"),155                "receiptHandle": msg.get("ReceiptHandle"),156                "md5OfBody": msg.get("MD5OfBody") or msg.get("MD5OfMessageBody"),157                "eventSourceARN": queue_arn,158                "eventSource": lambda_executors.EVENT_SOURCE_SQS,159                "awsRegion": region,160                "messageId": msg["MessageId"],161                "attributes": msg.get("Attributes", {}),162                "messageAttributes": message_attrs,163            }164            if md5OfMessageAttributes := msg.get("MD5OfMessageAttributes"):165                record["md5OfMessageAttributes"] = md5OfMessageAttributes166            records.append(record)167        event_filter_criterias = get_lambda_event_filters_for_arn(lambda_arn, queue_arn)168        if len(event_filter_criterias) > 0:169            # convert to json for filtering170            for record in records:171                try:172                    record["body"] = json.loads(record["body"])173                except json.JSONDecodeError:174                    LOG.warning(175                        f"Unable to convert record '{record['body']}' to json... Record might be dropped."176                    )177            records = filter_stream_records(records, event_filter_criterias)178            # convert them back179            for record in records:180                record["body"] = (181                    json.dumps(record["body"])182                    if not isinstance(record["body"], str)183                    else record["body"]184                )185        # all messages were filtered out186        if not len(records) > 0:187            return True188        event = {"Records": records}189        res = run_lambda(190            func_arn=lambda_arn,191            event=event,192            context={},193            asynchronous=True,194            callback=delete_messages,195        )196        if isinstance(res, InvocationResult):197            status_code = getattr(res.result, "status_code", 0)198            if status_code >= 400:199                return False200        return True201def parse_batch_item_failures(result: InvocationResult, valid_message_ids: List[str]) -> List[str]:202    """203    Parses a lambda responses as a partial batch failure response, that looks something like this::204        {205          "batchItemFailures": [206                {207                    "itemIdentifier": "id2"208                },209                {210                    "itemIdentifier": "id4"211                }212            ]213        }214    If the response returns an empty list, then the batch should be considered as a complete success. If an exception215    is raised, the batch should be considered a complete failure....

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