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How to use global_message_sequence method in localstack

Best Python code snippet using localstack_python
provider.py
Source:provider.py
...110class MissingParameter(CommonServiceException):111    def __init__(self, message):112        super().__init__("MissingParameter", message, 400, True)113@singleton_factory114def global_message_sequence():115    # creates a 20-digit number used as the start for the global sequence116    start = int(time.time()) << 33117    # itertools.count is thread safe over the GIL since its getAndIncrement operation is a single python bytecode op118    return itertools.count(start)119def generate_message_id():120    return long_uid()121def assert_queue_name(queue_name: str, fifo: bool = False):122    if queue_name.endswith(".fifo"):123        if not fifo:124            # Standard queues with .fifo suffix are not allowed125            raise InvalidParameterValue(126                "Can only include alphanumeric characters, hyphens, or underscores. 1 to 80 in length"127            )128        # The .fifo suffix counts towards the 80-character queue name quota.129        queue_name = queue_name[:-5] + "_fifo"130    # slashes are actually not allowed, but we've allowed it explicitly in localstack131    if not re.match(r"^[a-zA-Z0-9/_-]{1,80}$", queue_name):132        raise InvalidParameterValue(133            "Can only include alphanumeric characters, hyphens, or underscores. 1 to 80 in length"134        )135def check_message_size(message_body: str, max_message_size: int):136    # https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/quotas-messages.html137    error = "One or more parameters are invalid. "138    error += f"Reason: Message must be shorter than {max_message_size} bytes."139    # must encode as utf8 to get correct bytes with len140    if len(message_body.encode("utf8")) > max_message_size:141        raise InvalidParameterValue(error)142def check_message_content(message_body: str):143    error = "Invalid characters found. Valid unicode characters are #x9 | #xA | #xD | #x20 to #xD7FF | #xE000 to #xFFFD | #x10000 to #x10FFFF"144    if not re.match(MSG_CONTENT_REGEX, message_body):145        raise InvalidMessageContents(error)146def encode_receipt_handle(queue_arn, message: "SqsMessage") -> str:147    # http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/ImportantIdentifiers.html#ImportantIdentifiers-receipt-handles148    # encode the queue arn in the receipt handle, so we can later check if it belongs to the queue149    # but also add some randomness s.t. the generated receipt handles look like the ones from AWS150    handle = f"{long_uid()} {queue_arn} {message.message.get('MessageId')} {message.last_received}"151    encoded = base64.b64encode(handle.encode("utf-8"))152    return encoded.decode("utf-8")153def decode_receipt_handle(receipt_handle: str) -> str:154    try:155        handle = base64.b64decode(receipt_handle).decode("utf-8")156        _, queue_arn, message_id, last_received = handle.split(" ")157        parse_arn(queue_arn)  # raises a ValueError if it is not an arn158        return queue_arn159    except (IndexError, ValueError):160        raise ReceiptHandleIsInvalid(161            f'The input receipt handle "{receipt_handle}" is not a valid receipt handle.'162        )163class Permission(NamedTuple):164    # TODO: just a placeholder for real policies165    label: str166    account_id: str167    action: str168class SqsMessage:169    message: Message170    created: float171    visibility_timeout: int172    receive_times: int173    delay_seconds: Optional[int]174    receipt_handles: Set[str]175    last_received: Optional[float]176    first_received: Optional[float]177    visibility_deadline: Optional[float]178    deleted: bool179    priority: float180    message_deduplication_id: str181    message_group_id: str182    sequence_number: str183    def __init__(184        self,185        priority: float,186        message: Message,187        message_deduplication_id: str = None,188        message_group_id: str = None,189        sequence_number: str = None,190    ) -> None:191        self.created = time.time()192        self.message = message193        self.receive_times = 0194        self.receipt_handles = set()195        self.delay_seconds = None196        self.last_received = None197        self.first_received = None198        self.deleted = False199        self.priority = priority200        self.sequence_number = sequence_number201        attributes = {}202        if message_group_id is not None:203            attributes["MessageGroupId"] = message_group_id204        if message_deduplication_id is not None:205            attributes["MessageDeduplicationId"] = message_deduplication_id206        if sequence_number is not None:207            attributes["SequenceNumber"] = sequence_number208        if self.message.get("Attributes"):209            self.message["Attributes"].update(attributes)210        else:211            self.message["Attributes"] = attributes212    @property213    def message_group_id(self) -> Optional[str]:214        return self.message["Attributes"].get("MessageGroupId")215    @property216    def message_deduplication_id(self) -> Optional[str]:217        return self.message["Attributes"].get("MessageDeduplicationId")218    def set_last_received(self, timestamp: float):219        """220        Sets the last received timestamp of the message to the given value, and updates the visibility deadline221        accordingly.222        :param timestamp: the last time the message was received223        """224        self.last_received = timestamp225        self.visibility_deadline = timestamp + self.visibility_timeout226    def update_visibility_timeout(self, timeout: int):227        """228        Sets the visibility timeout of the message to the given value, and updates the visibility deadline accordingly.229        :param timeout: the timeout value in seconds230        """231        self.visibility_timeout = timeout232        self.visibility_deadline = time.time() + timeout233    @property234    def is_visible(self) -> bool:235        """236        Returns false if the message has a visibility deadline that is in the future.237        :return: whether the message is visibile or not.238        """239        if self.visibility_deadline is None:240            return True241        if time.time() >= self.visibility_deadline:242            return True243        return False244    @property245    def is_delayed(self) -> bool:246        if self.delay_seconds is None:247            return False248        return time.time() <= self.created + self.delay_seconds249    def __gt__(self, other):250        return self.priority > other.priority251    def __ge__(self, other):252        return self.priority >= other.priority253    def __lt__(self, other):254        return self.priority < other.priority255    def __le__(self, other):256        return self.priority <= other.priority257    def __eq__(self, other):258        return self.message["MessageId"] == other.message["MessageId"]259    def __hash__(self):260        return self.message["MessageId"].__hash__()261class SqsQueue:262    name: str263    region: str264    account_id: str265    attributes: QueueAttributeMap266    tags: TagMap267    permissions: Set[Permission]268    purge_in_progress: bool269    purge_timestamp: Optional[float]270    visible: PriorityQueue271    delayed: Set[SqsMessage]272    inflight: Set[SqsMessage]273    receipts: Dict[str, SqsMessage]274    def __init__(self, name: str, region: str, account_id: str, attributes=None, tags=None) -> None:275        self.name = name276        self.region = region277        self.account_id = account_id278        self._assert_queue_name(name)279        self.tags = tags or {}280        self.visible = PriorityQueue()281        self.delayed = set()282        self.inflight = set()283        self.receipts = {}284        self.attributes = self.default_attributes()285        if attributes:286            self.attributes.update(attributes)287        self.purge_in_progress = False288        self.purge_timestamp = None289        self.permissions = set()290        self.mutex = threading.RLock()291    def default_attributes(self) -> QueueAttributeMap:292        return {293            QueueAttributeName.ApproximateNumberOfMessages: lambda: self.visible._qsize(),294            QueueAttributeName.ApproximateNumberOfMessagesNotVisible: lambda: len(self.inflight),295            QueueAttributeName.ApproximateNumberOfMessagesDelayed: lambda: len(self.delayed),296            QueueAttributeName.CreatedTimestamp: str(now()),297            QueueAttributeName.DelaySeconds: "0",298            QueueAttributeName.LastModifiedTimestamp: str(now()),299            QueueAttributeName.MaximumMessageSize: str(DEFAULT_MAXIMUM_MESSAGE_SIZE),300            QueueAttributeName.MessageRetentionPeriod: "345600",301            QueueAttributeName.QueueArn: self.arn,302            QueueAttributeName.ReceiveMessageWaitTimeSeconds: "0",303            QueueAttributeName.VisibilityTimeout: "30",304            QueueAttributeName.SqsManagedSseEnabled: "false",305        }306    def update_delay_seconds(self, value: int):307        """308        For standard queues, the per-queue delay setting is not retroactiveâchanging the setting doesn't affect the delay of messages already in the queue.309        For FIFO queues, the per-queue delay setting is retroactiveâchanging the setting affects the delay of messages already in the queue.310        https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-delay-queues.html311        :param value: the number of seconds312        """313        self.attributes[QueueAttributeName.DelaySeconds] = str(value)314    def update_last_modified(self, timestamp: int = None):315        if timestamp is None:316            timestamp = now()317        self.attributes[QueueAttributeName.LastModifiedTimestamp] = str(timestamp)318    @property319    def arn(self) -> str:320        return f"arn:aws:sqs:{self.region}:{self.account_id}:{self.name}"321    def url(self, context: RequestContext) -> str:322        """Return queue URL using either SQS_PORT_EXTERNAL (if configured), the SQS_ENDPOINT_STRATEGY (if configured)323        or based on the 'Host' request header"""324        host_url = context.request.host_url325        if config.SQS_ENDPOINT_STRATEGY == "domain":326            # queue.localhost.localstack.cloud:4566/000000000000/my-queue (us-east-1)327            # or us-east-2.queue.localhost.localstack.cloud:4566/000000000000/my-queue328            region = "" if self.region == "us-east-1" else self.region + "."329            scheme = context.request.scheme330            host_url = f"{scheme}://{region}queue.{constants.LOCALHOST_HOSTNAME}:{config.EDGE_PORT}"331        elif config.SQS_ENDPOINT_STRATEGY == "path":332            # https?://localhost:4566/queue/us-east-1/00000000000/my-queue (us-east-1)333            host_url = f"{context.request.host_url}/queue/{self.region}"334        else:335            if config.SQS_PORT_EXTERNAL:336                host_url = external_service_url("sqs")337        return "{host}/{account_id}/{name}".format(338            host=host_url.rstrip("/"),339            account_id=self.account_id,340            name=self.name,341        )342    @property343    def visibility_timeout(self) -> int:344        return int(self.attributes[QueueAttributeName.VisibilityTimeout])345    @property346    def delay_seconds(self) -> int:347        return int(self.attributes[QueueAttributeName.DelaySeconds])348    @property349    def wait_time_seconds(self) -> int:350        return int(self.attributes[QueueAttributeName.ReceiveMessageWaitTimeSeconds])351    @property352    def maximum_message_size(self):353        return int(self.attributes[QueueAttributeName.MaximumMessageSize])354    def validate_receipt_handle(self, receipt_handle: str):355        if self.arn != decode_receipt_handle(receipt_handle):356            raise ReceiptHandleIsInvalid(357                f'The input receipt handle "{receipt_handle}" is not a valid receipt handle.'358            )359    def update_visibility_timeout(self, receipt_handle: str, visibility_timeout: int):360        with self.mutex:361            self.validate_receipt_handle(receipt_handle)362            if receipt_handle not in self.receipts:363                raise InvalidParameterValue(364                    f"Value {receipt_handle} for parameter ReceiptHandle is invalid. Reason: Message does not exist "365                    f"or is not available for visibility timeout change."366                )367            standard_message = self.receipts[receipt_handle]368            if standard_message not in self.inflight:369                raise MessageNotInflight()370            standard_message.update_visibility_timeout(visibility_timeout)371            if visibility_timeout == 0:372                LOG.info(373                    "terminating the visibility timeout of %s",374                    standard_message.message["MessageId"],375                )376                # Terminating the visibility timeout for a message377                # https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-visibility-timeout.html#terminating-message-visibility-timeout378                self.inflight.remove(standard_message)379                self.visible.put_nowait(standard_message)380    def remove(self, receipt_handle: str):381        with self.mutex:382            self.validate_receipt_handle(receipt_handle)383            if receipt_handle not in self.receipts:384                LOG.debug(385                    "no in-flight message found for receipt handle %s in queue %s",386                    receipt_handle,387                    self.arn,388                )389                return390            standard_message = self.receipts[receipt_handle]391            standard_message.deleted = True392            LOG.debug(393                "deleting message %s from queue %s",394                standard_message.message["MessageId"],395                self.arn,396            )397            # remove all handles398            for handle in standard_message.receipt_handles:399                del self.receipts[handle]400            standard_message.receipt_handles.clear()401            # remove in-flight message402            try:403                self.inflight.remove(standard_message)404            except KeyError:405                # this means the message was re-queued in the meantime406                # TODO: remove this message from the visible queue if it exists: a message can be removed with an old407                #  receipt handle that was issued before the message was put back in the visible queue.408                self.visible.queue.remove(standard_message)409                heapq.heapify(self.visible.queue)410    def put(411        self,412        message: Message,413        visibility_timeout: int = None,414        message_deduplication_id: str = None,415        message_group_id: str = None,416        delay_seconds: int = None,417    ) -> SqsMessage:418        raise NotImplementedError419    def get(self, block=True, timeout=None, visibility_timeout: int = None) -> SqsMessage:420        start = time.time()421        while True:422            standard_message: SqsMessage = self.visible.get(block=block, timeout=timeout)423            LOG.debug(424                "de-queued message %s from %s", standard_message.message["MessageId"], self.arn425            )426            with self.mutex:427                if standard_message.deleted:428                    # TODO: check what the behavior of AWS is here. should we return a deleted message?429                    timeout -= time.time() - start430                    if timeout < 0:431                        timeout = 0432                    continue433                # update message attributes434                standard_message.visibility_timeout = (435                    self.visibility_timeout if visibility_timeout is None else visibility_timeout436                )437                standard_message.receive_times += 1438                standard_message.set_last_received(time.time())439                if standard_message.first_received is None:440                    standard_message.first_received = standard_message.last_received441                # create and manage receipt handle442                receipt_handle = self.create_receipt_handle(standard_message)443                standard_message.receipt_handles.add(receipt_handle)444                self.receipts[receipt_handle] = standard_message445                if standard_message.visibility_timeout == 0:446                    self.visible.put_nowait(standard_message)447                else:448                    self.inflight.add(standard_message)449            # prepare message for receiver450            copied_message = copy.deepcopy(standard_message)451            copied_message.message["Attributes"][452                MessageSystemAttributeName.ApproximateReceiveCount453            ] = str(standard_message.receive_times)454            copied_message.message["Attributes"][455                MessageSystemAttributeName.ApproximateFirstReceiveTimestamp456            ] = str(int(standard_message.first_received * 1000))457            copied_message.message["ReceiptHandle"] = receipt_handle458            return copied_message459    def clear(self):460        """461        Calls clear on all internal datastructures that hold messages and data related to them.462        """463        with self.mutex:464            self.visible.queue.clear()465            self.inflight.clear()466            self.delayed.clear()467            self.receipts.clear()468    def create_receipt_handle(self, message: SqsMessage) -> str:469        return encode_receipt_handle(self.arn, message)470    def requeue_inflight_messages(self):471        if not self.inflight:472            return473        with self.mutex:474            messages = [message for message in self.inflight if message.is_visible]475            for standard_message in messages:476                LOG.debug(477                    "re-queueing inflight messages %s into queue %s",478                    standard_message.message["MessageId"],479                    self.arn,480                )481                self.inflight.remove(standard_message)482                self.visible.put_nowait(standard_message)483    def enqueue_delayed_messages(self):484        if not self.delayed:485            return486        with self.mutex:487            messages = [message for message in self.delayed if not message.is_delayed]488            for standard_message in messages:489                LOG.debug(490                    "enqueueing delayed messages %s into queue %s",491                    standard_message.message["MessageId"],492                    self.arn,493                )494                self.delayed.remove(standard_message)495                self.visible.put_nowait(standard_message)496    def _assert_queue_name(self, name):497        if not re.match(r"^[a-zA-Z0-9_-]{1,80}$", name):498            raise InvalidParameterValue(499                "Can only include alphanumeric characters, hyphens, or underscores. 1 to 80 in length"500            )501    def validate_queue_attributes(self, attributes):502        valid = [503            k[1]504            for k in inspect.getmembers(QueueAttributeName)505            if k not in INTERNAL_QUEUE_ATTRIBUTES506        ]507        del valid[valid.index(QueueAttributeName.FifoQueue)]508        for k in attributes.keys():509            if k not in valid:510                raise InvalidAttributeName(f"Unknown Attribute {k}.")511class StandardQueue(SqsQueue):512    def put(513        self,514        message: Message,515        visibility_timeout: int = None,516        message_deduplication_id: str = None,517        message_group_id: str = None,518        delay_seconds: int = None,519    ):520        if message_deduplication_id:521            raise InvalidParameterValue(522                f"Value {message_deduplication_id} for parameter MessageDeduplicationId is invalid. Reason: The "523                f"request includes a parameter that is not valid for this queue type. "524            )525        if message_group_id:526            raise InvalidParameterValue(527                f"Value {message_group_id} for parameter MessageGroupId is invalid. Reason: The request includes a "528                f"parameter that is not valid for this queue type. "529            )530        standard_message = SqsMessage(time.time(), message)531        if visibility_timeout is not None:532            standard_message.visibility_timeout = visibility_timeout533        else:534            # use the attribute from the queue535            standard_message.visibility_timeout = self.visibility_timeout536        if delay_seconds is not None:537            standard_message.delay_seconds = delay_seconds538        else:539            standard_message.delay_seconds = self.delay_seconds540        if standard_message.is_delayed:541            self.delayed.add(standard_message)542        else:543            self.visible.put_nowait(standard_message)544        return standard_message545class FifoQueue(SqsQueue):546    deduplication: Dict[str, Dict[str, SqsMessage]]547    def __init__(self, name: str, region: str, account_id: str, attributes=None, tags=None) -> None:548        super().__init__(name, region, account_id, attributes, tags)549        self.deduplication = {}550    def default_attributes(self) -> QueueAttributeMap:551        return {552            **super().default_attributes(),553            QueueAttributeName.ContentBasedDeduplication: "false",554            QueueAttributeName.DeduplicationScope: "queue",555            QueueAttributeName.FifoThroughputLimit: "perQueue",556        }557    def update_delay_seconds(self, value: int):558        super(FifoQueue, self).update_delay_seconds(value)559        for message in self.delayed:560            message.delay_seconds = value561    def put(562        self,563        message: Message,564        visibility_timeout: int = None,565        message_deduplication_id: str = None,566        message_group_id: str = None,567        delay_seconds: int = None,568    ):569        if delay_seconds:570            # in fifo queues, delay is only applied on queue level. However, explicitly setting delay_seconds=0 is valid571            raise InvalidParameterValue(572                f"Value {delay_seconds} for parameter DelaySeconds is invalid. Reason: The request include parameter "573                f"that is not valid for this queue type."574            )575        if not message_group_id:576            raise MissingParameter("The request must contain the parameter MessageGroupId.")577        dedup_id = message_deduplication_id578        content_based_deduplication = (579            "true"580            == (self.attributes.get(QueueAttributeName.ContentBasedDeduplication, "false")).lower()581        )582        if not dedup_id and content_based_deduplication:583            dedup_id = hashlib.sha256(message.get("Body").encode("utf-8")).hexdigest()584        if not dedup_id:585            raise InvalidParameterValue(586                "The Queue should either have ContentBasedDeduplication enabled or MessageDeduplicationId provided "587                "explicitly "588            )589        fifo_message = SqsMessage(590            time.time(),591            message,592            message_deduplication_id=dedup_id,593            message_group_id=message_group_id,594            sequence_number=str(self.next_sequence_number()),595        )596        if visibility_timeout is not None:597            fifo_message.visibility_timeout = visibility_timeout598        else:599            # use the attribute from the queue600            fifo_message.visibility_timeout = self.visibility_timeout601        if delay_seconds is not None:602            fifo_message.delay_seconds = delay_seconds603        else:604            fifo_message.delay_seconds = self.delay_seconds605        original_message = None606        original_message_group = self.deduplication.get(message_group_id)607        if original_message_group:608            original_message = original_message_group.get(dedup_id)609        if (610            original_message611            and not original_message.deleted612            and original_message.priority + DEDUPLICATION_INTERVAL_IN_SEC > fifo_message.priority613        ):614            message["MessageId"] = original_message.message["MessageId"]615        else:616            if fifo_message.is_delayed:617                self.delayed.add(fifo_message)618            else:619                self.visible.put_nowait(fifo_message)620            if not original_message_group:621                self.deduplication[message_group_id] = {}622            self.deduplication[message_group_id][dedup_id] = fifo_message623        return fifo_message624    def _assert_queue_name(self, name):625        if not name.endswith(".fifo"):626            raise InvalidParameterValue(627                "The name of a FIFO queue can only include alphanumeric characters, hyphens, or underscores, "628                "must end with .fifo suffix and be 1 to 80 in length"629            )630        # The .fifo suffix counts towards the 80-character queue name quota.631        queue_name = name[:-5] + "_fifo"632        super()._assert_queue_name(queue_name)633    def validate_queue_attributes(self, attributes):634        valid = [635            k[1]636            for k in inspect.getmembers(QueueAttributeName)637            if k not in INTERNAL_QUEUE_ATTRIBUTES638        ]639        for k in attributes.keys():640            if k not in valid:641                raise InvalidAttributeName(f"Unknown Attribute {k}.")642        # Special Cases643        fifo = attributes.get(QueueAttributeName.FifoQueue)644        if fifo and fifo.lower() != "true":645            raise InvalidAttributeValue(646                "Invalid value for the parameter FifoQueue. Reason: Modifying queue type is not supported."647            )648    def next_sequence_number(self):649        return next(global_message_sequence())650class QueueUpdateWorker:651    """652    Regularly re-queues inflight and delayed messages whose visibility timeout has expired or delay deadline has been653    reached.654    """655    def __init__(self) -> None:656        super().__init__()657        self.scheduler = Scheduler()658        self.thread: Optional[FuncThread] = None659        self.mutex = threading.RLock()660    def do_update_all_queues(self):661        for region in SqsBackend.regions().keys():662            backend = SqsBackend.get(region)663            for queue in backend.queues.values():...
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