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How to use is_kinesis_stream_exists method in localstack

Best Python code snippet using localstack_python
dynamodb_listener.py
Source:dynamodb_listener.py
...240        elif action == "EnableKinesisStreamingDestination":241            # Check if table exists, to avoid error log output from DynamoDBLocal242            if not self.table_exists(ddb_client, data["TableName"]):243                return get_table_not_found_error()244            stream = is_kinesis_stream_exists(stream_arn=data["StreamArn"])245            if not stream:246                return error_response(247                    error_type="ValidationException",248                    message="User does not have a permission to use kinesis stream",249                )250            return dynamodb_enable_kinesis_streaming_destination(data, table_def)251        elif action == "DisableKinesisStreamingDestination":252            # Check if table exists, to avoid error log output from DynamoDBLocal253            if not self.table_exists(ddb_client, data["TableName"]):254                return get_table_not_found_error()255            stream = is_kinesis_stream_exists(stream_arn=data["StreamArn"])256            if not stream:257                return error_response(258                    error_type="ValidationException",259                    message="User does not have a permission to use kinesis stream",260                )261            return dynamodb_disable_kinesis_streaming_destination(data, table_def)262        elif action == "DescribeKinesisStreamingDestination":263            # Check if table exists, to avoid error log output from DynamoDBLocal264            if not self.table_exists(ddb_client, data["TableName"]):265                return get_table_not_found_error()266            response = aws_responses.requests_response(267                {268                    "KinesisDataStreamDestinations": table_def.get("KinesisDataStreamDestinations")269                    or [],270                    "TableName": data["TableName"],271                }272            )273            return response274        return Request(data=data_orig, method=method, headers=headers)275    def return_response(self, method, path, data, headers, response):276        if path.startswith("/shell") or method == "GET":277            return278        data = json.loads(to_str(data))279        # update table definitions280        if data and "TableName" in data and "KeySchema" in data:281            table_definitions = DynamoDBRegion.get().table_definitions282            table_definitions[data["TableName"]] = data283        if response._content:284            # fix the table and latest stream ARNs (DynamoDBLocal hardcodes "ddblocal" as the region)285            content_replaced = re.sub(286                r'("TableArn"|"LatestStreamArn"|"StreamArn")\s*:\s*"arn:aws:dynamodb:ddblocal:([^"]+)"',287                r'\1: "arn:aws:dynamodb:%s:\2"' % aws_stack.get_region(),288                to_str(response._content),289            )290            if content_replaced != response._content:291                response._content = content_replaced292                fix_headers_for_updated_response(response)293        action = headers.get("X-Amz-Target", "")294        action = action.replace(ACTION_PREFIX, "")295        if not action:296            return297        # upgrade event version to 1.1298        record = {299            "eventID": "1",300            "eventVersion": "1.1",301            "dynamodb": {302                "ApproximateCreationDateTime": time.time(),303                # 'StreamViewType': 'NEW_AND_OLD_IMAGES',304                "SizeBytes": -1,305            },306            "awsRegion": aws_stack.get_region(),307            "eventSource": "aws:dynamodb",308        }309        records = [record]310        streams_enabled_cache = {}311        table_name = data.get("TableName")312        event_sources_or_streams_enabled = has_event_sources_or_streams_enabled(313            table_name, streams_enabled_cache314        )315        if action == "UpdateItem":316            if response.status_code == 200 and event_sources_or_streams_enabled:317                existing_item = self._thread_local("existing_item")318                record["eventName"] = "INSERT" if not existing_item else "MODIFY"319                record["eventID"] = short_uid()320                updated_item = find_existing_item(data)321                if not updated_item:322                    return323                record["dynamodb"]["Keys"] = data["Key"]324                if existing_item:325                    record["dynamodb"]["OldImage"] = existing_item326                record["dynamodb"]["NewImage"] = updated_item327                record["dynamodb"]["SizeBytes"] = len(json.dumps(updated_item))328                stream_spec = dynamodb_get_table_stream_specification(table_name=table_name)329                if stream_spec:330                    record["dynamodb"]["StreamViewType"] = stream_spec["StreamViewType"]331        elif action == "BatchWriteItem":332            records, unprocessed_items = self.prepare_batch_write_item_records(record, data)333            for record in records:334                event_sources_or_streams_enabled = (335                    event_sources_or_streams_enabled336                    or has_event_sources_or_streams_enabled(337                        record["eventSourceARN"], streams_enabled_cache338                    )339                )340            if response.status_code == 200 and any(unprocessed_items):341                content = json.loads(to_str(response.content))342                table_name = list(data["RequestItems"].keys())[0]343                if table_name not in content["UnprocessedItems"]:344                    content["UnprocessedItems"][table_name] = []345                for key in ["PutRequest", "DeleteRequest"]:346                    if any(unprocessed_items[key]):347                        content["UnprocessedItems"][table_name].append(348                            {key: unprocessed_items[key]}349                        )350                unprocessed = content["UnprocessedItems"]351                for key in list(unprocessed.keys()):352                    if not unprocessed.get(key):353                        del unprocessed[key]354                response._content = json.dumps(content)355                fix_headers_for_updated_response(response)356        elif action == "TransactWriteItems":357            records = self.prepare_transact_write_item_records(record, data)358            for record in records:359                event_sources_or_streams_enabled = (360                    event_sources_or_streams_enabled361                    or has_event_sources_or_streams_enabled(362                        record["eventSourceARN"], streams_enabled_cache363                    )364                )365        elif action == "PutItem":366            if response.status_code == 200:367                keys = dynamodb_extract_keys(item=data["Item"], table_name=table_name)368                if isinstance(keys, Response):369                    return keys370                # fix response371                if response._content == "{}":372                    response._content = update_put_item_response_content(data, response._content)373                    fix_headers_for_updated_response(response)374                if event_sources_or_streams_enabled:375                    existing_item = self._thread_local("existing_item")376                    # Get stream specifications details for the table377                    stream_spec = dynamodb_get_table_stream_specification(table_name=table_name)378                    record["eventName"] = "INSERT" if not existing_item else "MODIFY"379                    # prepare record keys380                    record["dynamodb"]["Keys"] = keys381                    record["dynamodb"]["NewImage"] = data["Item"]382                    record["dynamodb"]["SizeBytes"] = len(json.dumps(data["Item"]))383                    record["eventID"] = short_uid()384                    if stream_spec:385                        record["dynamodb"]["StreamViewType"] = stream_spec["StreamViewType"]386                    if existing_item:387                        record["dynamodb"]["OldImage"] = existing_item388        elif action in ("GetItem", "Query"):389            if response.status_code == 200:390                content = json.loads(to_str(response.content))391                # make sure we append 'ConsumedCapacity', which is properly392                # returned by dynalite, but not by AWS's DynamoDBLocal393                if "ConsumedCapacity" not in content and data.get("ReturnConsumedCapacity") in [394                    "TOTAL",395                    "INDEXES",396                ]:397                    content["ConsumedCapacity"] = {398                        "TableName": table_name,399                        "CapacityUnits": 5,  # TODO hardcoded400                        "ReadCapacityUnits": 2,401                        "WriteCapacityUnits": 3,402                    }403                    response._content = json.dumps(content)404                    fix_headers_for_updated_response(response)405        elif action == "DeleteItem":406            if response.status_code == 200 and event_sources_or_streams_enabled:407                old_item = self._thread_local("existing_item")408                record["eventID"] = short_uid()409                record["eventName"] = "REMOVE"410                record["dynamodb"]["Keys"] = data["Key"]411                record["dynamodb"]["OldImage"] = old_item412                record["dynamodb"]["SizeBytes"] = len(json.dumps(old_item))413                # Get stream specifications details for the table414                stream_spec = dynamodb_get_table_stream_specification(table_name=table_name)415                if stream_spec:416                    record["dynamodb"]["StreamViewType"] = stream_spec["StreamViewType"]417        elif action == "CreateTable":418            if response.status_code == 200:419                table_definitions = (420                    DynamoDBRegion.get().table_definitions.get(data["TableName"]) or {}421                )422                if "TableId" not in table_definitions:423                    table_definitions["TableId"] = long_uid()424                if "SSESpecification" in table_definitions:425                    sse_specification = table_definitions.pop("SSESpecification")426                    table_definitions["SSEDescription"] = get_sse_description(sse_specification)427                content = json.loads(to_str(response.content))428                if table_definitions:429                    table_content = content.get("Table", {})430                    table_content.update(table_definitions)431                    content["TableDescription"].update(table_content)432                    update_response_content(response, content)433                if "StreamSpecification" in data:434                    create_dynamodb_stream(435                        data, content["TableDescription"].get("LatestStreamLabel")436                    )437                if data.get("Tags"):438                    table_arn = content["TableDescription"]["TableArn"]439                    DynamoDBRegion.TABLE_TAGS[table_arn] = {440                        tag["Key"]: tag["Value"] for tag in data["Tags"]441                    }442            event_publisher.fire_event(443                event_publisher.EVENT_DYNAMODB_CREATE_TABLE,444                payload={"n": event_publisher.get_hash(table_name)},445            )446            return447        elif action == "DeleteTable":448            if response.status_code == 200:449                table_arn = (450                    json.loads(response._content).get("TableDescription", {}).get("TableArn")451                )452                event_publisher.fire_event(453                    event_publisher.EVENT_DYNAMODB_DELETE_TABLE,454                    payload={"n": event_publisher.get_hash(table_name)},455                )456                self.delete_all_event_source_mappings(table_arn)457                dynamodbstreams_api.delete_streams(table_arn)458                DynamoDBRegion.TABLE_TAGS.pop(table_arn, None)459            return460        elif action == "UpdateTable":461            content_str = to_str(response._content or "")462            if response.status_code == 200 and "StreamSpecification" in data:463                content = json.loads(content_str)464                create_dynamodb_stream(data, content["TableDescription"].get("LatestStreamLabel"))465            if (466                response.status_code >= 400467                and data.get("ReplicaUpdates")468                and "Nothing to update" in content_str469            ):470                table_name = data.get("TableName")471                # update local table props (replicas)472                table_properties = DynamoDBRegion.get().table_properties473                table_properties[table_name] = table_props = table_properties.get(table_name) or {}474                table_props["Replicas"] = replicas = table_props.get("Replicas") or []475                for repl_update in data["ReplicaUpdates"]:476                    for key, details in repl_update.items():477                        region = details.get("RegionName")478                        if key == "Create":479                            details["ReplicaStatus"] = details.get("ReplicaStatus") or "ACTIVE"480                            replicas.append(details)481                        if key == "Update":482                            replica = [r for r in replicas if r.get("RegionName") == region]483                            if replica:484                                replica[0].update(details)485                        if key == "Delete":486                            table_props["Replicas"] = [487                                r for r in replicas if r.get("RegionName") != region488                            ]489                # update response content490                schema = get_table_schema(table_name)491                result = {"TableDescription": schema["Table"]}492                update_response_content(response, json_safe(result), 200)493            return494        elif action == "DescribeTable":495            table_name = data.get("TableName")496            table_props = DynamoDBRegion.get().table_properties.get(table_name)497            if table_props:498                content = json.loads(to_str(response.content))499                content.get("Table", {}).update(table_props)500                update_response_content(response, content)501            # Update only TableId and SSEDescription if present502            table_definitions = DynamoDBRegion.get().table_definitions.get(table_name)503            if table_definitions:504                for key in ["TableId", "SSEDescription"]:505                    if table_definitions.get(key):506                        content = json.loads(to_str(response.content))507                        content.get("Table", {})[key] = table_definitions[key]508                        update_response_content(response, content)509        elif action == "TagResource":510            table_arn = data["ResourceArn"]511            table_tags = DynamoDBRegion.TABLE_TAGS512            if table_arn not in table_tags:513                table_tags[table_arn] = {}514            table_tags[table_arn].update({tag["Key"]: tag["Value"] for tag in data.get("Tags", [])})515            return516        elif action == "UntagResource":517            table_arn = data["ResourceArn"]518            for tag_key in data.get("TagKeys", []):519                DynamoDBRegion.TABLE_TAGS.get(table_arn, {}).pop(tag_key, None)520            return521        else:522            # nothing to do523            return524        if event_sources_or_streams_enabled and records and "eventName" in records[0]:525            if "TableName" in data:526                records[0]["eventSourceARN"] = aws_stack.dynamodb_table_arn(table_name)527            # forward to kinesis stream528            records_to_kinesis = copy.deepcopy(records)529            forward_to_kinesis_stream(records_to_kinesis)530            # forward to lambda and ddb_streams531            forward_to_lambda(records)532            records = self.prepare_records_to_forward_to_ddb_stream(records)533            forward_to_ddb_stream(records)534    # -------------535    # UTIL METHODS536    # -------------537    def prepare_request_headers(self, headers):538        # Note: We need to ensure that the same access key is used here for all requests,539        # otherwise DynamoDBLocal stores tables/items in separate namespaces540        headers["Authorization"] = re.sub(541            r"Credential=[^/]+/",542            r"Credential=%s/" % constants.TEST_AWS_ACCESS_KEY_ID,543            headers.get("Authorization") or "",544        )545    def prepare_batch_write_item_records(self, record, data):546        records = []547        unprocessed_items = {"PutRequest": {}, "DeleteRequest": {}}548        i = 0549        for table_name in sorted(data["RequestItems"].keys()):550            # Add stream view type to record if ddb stream is enabled551            stream_spec = dynamodb_get_table_stream_specification(table_name=table_name)552            if stream_spec:553                record["dynamodb"]["StreamViewType"] = stream_spec["StreamViewType"]554            for request in data["RequestItems"][table_name]:555                put_request = request.get("PutRequest")556                existing_items = self._thread_local("existing_items")557                if put_request:558                    if existing_items and len(existing_items) > i:559                        existing_item = existing_items[i]560                        keys = dynamodb_extract_keys(561                            item=put_request["Item"], table_name=table_name562                        )563                        if isinstance(keys, Response):564                            return keys565                        new_record = clone(record)566                        new_record["eventID"] = short_uid()567                        new_record["dynamodb"]["SizeBytes"] = len(json.dumps(put_request["Item"]))568                        new_record["eventName"] = "INSERT" if not existing_item else "MODIFY"569                        new_record["dynamodb"]["Keys"] = keys570                        new_record["dynamodb"]["NewImage"] = put_request["Item"]571                        if existing_item:572                            new_record["dynamodb"]["OldImage"] = existing_item573                        new_record["eventSourceARN"] = aws_stack.dynamodb_table_arn(table_name)574                        records.append(new_record)575                    unprocessed_put_items = self._thread_local("unprocessed_put_items")576                    if unprocessed_put_items and len(unprocessed_put_items) > i:577                        unprocessed_item = unprocessed_put_items[i]578                        if unprocessed_item:579                            unprocessed_items["PutRequest"].update(580                                json.loads(json.dumps(unprocessed_item))581                            )582                delete_request = request.get("DeleteRequest")583                if delete_request:584                    if existing_items and len(existing_items) > i:585                        keys = delete_request["Key"]586                        if isinstance(keys, Response):587                            return keys588                        new_record = clone(record)589                        new_record["eventID"] = short_uid()590                        new_record["eventName"] = "REMOVE"591                        new_record["dynamodb"]["Keys"] = keys592                        new_record["dynamodb"]["OldImage"] = existing_items[i]593                        new_record["dynamodb"]["SizeBytes"] = len(json.dumps(existing_items[i]))594                        new_record["eventSourceARN"] = aws_stack.dynamodb_table_arn(table_name)595                        records.append(new_record)596                    unprocessed_delete_items = self._thread_local("unprocessed_delete_items")597                    if unprocessed_delete_items and len(unprocessed_delete_items) > i:598                        unprocessed_item = unprocessed_delete_items[i]599                        if unprocessed_item:600                            unprocessed_items["DeleteRequest"].update(601                                json.loads(json.dumps(unprocessed_item))602                            )603                i += 1604        return records, unprocessed_items605    def prepare_transact_write_item_records(self, record, data):606        records = []607        # Fix issue #2745: existing_items only contain the Put/Update/Delete records,608        # so we will increase the index based on these events609        i = 0610        for request in data["TransactItems"]:611            put_request = request.get("Put")612            if put_request:613                existing_item = self._thread_local("existing_items")[i]614                table_name = put_request["TableName"]615                keys = dynamodb_extract_keys(item=put_request["Item"], table_name=table_name)616                if isinstance(keys, Response):617                    return keys618                # Add stream view type to record if ddb stream is enabled619                stream_spec = dynamodb_get_table_stream_specification(table_name=table_name)620                if stream_spec:621                    record["dynamodb"]["StreamViewType"] = stream_spec["StreamViewType"]622                new_record = clone(record)623                new_record["eventID"] = short_uid()624                new_record["eventName"] = "INSERT" if not existing_item else "MODIFY"625                new_record["dynamodb"]["Keys"] = keys626                new_record["dynamodb"]["NewImage"] = put_request["Item"]627                if existing_item:628                    new_record["dynamodb"]["OldImage"] = existing_item629                new_record["eventSourceARN"] = aws_stack.dynamodb_table_arn(table_name)630                new_record["dynamodb"]["SizeBytes"] = len(json.dumps(put_request["Item"]))631                records.append(new_record)632                i += 1633            update_request = request.get("Update")634            if update_request:635                table_name = update_request["TableName"]636                keys = update_request["Key"]637                if isinstance(keys, Response):638                    return keys639                updated_item = find_existing_item(update_request, table_name)640                if not updated_item:641                    return []642                stream_spec = dynamodb_get_table_stream_specification(table_name=table_name)643                if stream_spec:644                    record["dynamodb"]["StreamViewType"] = stream_spec["StreamViewType"]645                new_record = clone(record)646                new_record["eventID"] = short_uid()647                new_record["eventName"] = "MODIFY"648                new_record["dynamodb"]["Keys"] = keys649                new_record["dynamodb"]["OldImage"] = self._thread_local("existing_items")[i]650                new_record["dynamodb"]["NewImage"] = updated_item651                new_record["eventSourceARN"] = aws_stack.dynamodb_table_arn(table_name)652                new_record["dynamodb"]["SizeBytes"] = len(json.dumps(updated_item))653                records.append(new_record)654                i += 1655            delete_request = request.get("Delete")656            if delete_request:657                table_name = delete_request["TableName"]658                keys = delete_request["Key"]659                existing_item = self._thread_local("existing_items")[i]660                if isinstance(keys, Response):661                    return keys662                stream_spec = dynamodb_get_table_stream_specification(table_name=table_name)663                if stream_spec:664                    record["dynamodb"]["StreamViewType"] = stream_spec["StreamViewType"]665                new_record = clone(record)666                new_record["eventID"] = short_uid()667                new_record["eventName"] = "REMOVE"668                new_record["dynamodb"]["Keys"] = keys669                new_record["dynamodb"]["OldImage"] = existing_item670                new_record["dynamodb"]["SizeBytes"] = len(json.dumps(existing_item))671                new_record["eventSourceARN"] = aws_stack.dynamodb_table_arn(table_name)672                records.append(new_record)673                i += 1674        return records675    def prepare_records_to_forward_to_ddb_stream(self, records):676        # StreamViewType determines what information is written to the stream for the table677        # When an item in the table is inserted, updated or deleted678        for record in records:679            if record["dynamodb"].get("StreamViewType"):680                # KEYS_ONLY  - Only the key attributes of the modified item are written to the stream681                if record["dynamodb"]["StreamViewType"] == "KEYS_ONLY":682                    record["dynamodb"].pop("OldImage", None)683                    record["dynamodb"].pop("NewImage", None)684                # NEW_IMAGE - The entire item, as it appears after it was modified, is written to the stream685                elif record["dynamodb"]["StreamViewType"] == "NEW_IMAGE":686                    record["dynamodb"].pop("OldImage", None)687                # OLD_IMAGE - The entire item, as it appeared before it was modified, is written to the stream688                elif record["dynamodb"]["StreamViewType"] == "OLD_IMAGE":689                    record["dynamodb"].pop("NewImage", None)690        return records691    def delete_all_event_source_mappings(self, table_arn):692        if table_arn:693            # fix start dynamodb service without lambda694            if not is_api_enabled("lambda"):695                return696            lambda_client = aws_stack.connect_to_service("lambda")697            result = lambda_client.list_event_source_mappings(EventSourceArn=table_arn)698            for event in result["EventSourceMappings"]:699                event_source_mapping_id = event["UUID"]700                lambda_client.delete_event_source_mapping(UUID=event_source_mapping_id)701    @staticmethod702    def _thread_local(name, default=None):703        try:704            return getattr(ProxyListenerDynamoDB.thread_local, name)705        except AttributeError:706            return default707def get_sse_kms_managed_key():708    if MANAGED_KMS_KEYS.get(aws_stack.get_region()):709        return MANAGED_KMS_KEYS[aws_stack.get_region()]710    kms_client = aws_stack.connect_to_service("kms")711    key_data = kms_client.create_key(Description="Default key that protects DynamoDB data")712    key_id = key_data["KeyMetadata"]["KeyId"]713    # not really happy with this import here714    from localstack.services.kms import kms_listener715    kms_listener.set_key_managed(key_id)716    MANAGED_KMS_KEYS[aws_stack.get_region()] = key_id717    return key_id718def get_sse_description(data):719    if data.get("Enabled"):720        kms_master_key_id = data.get("KMSMasterKeyId")721        if not kms_master_key_id:722            # this is of course not the actual key for dynamodb, just a better, since existing, mock723            kms_master_key_id = get_sse_kms_managed_key()724        kms_master_key_id = aws_stack.kms_key_arn(kms_master_key_id)725        return {726            "Status": "ENABLED",727            "SSEType": "KMS",  # no other value is allowed here728            "KMSMasterKeyArn": kms_master_key_id,729        }730    return {}731def handle_special_request(method, path, data, headers):732    if path.startswith("/shell") or method == "GET":733        if path == "/shell":734            headers = {"Refresh": "0; url=%s/shell/" % config.TEST_DYNAMODB_URL}735            return aws_responses.requests_response("", headers=headers)736        return True737    if method == "OPTIONS":738        return 200739def create_global_table(data):740    table_name = data["GlobalTableName"]741    if table_name in DynamoDBRegion.GLOBAL_TABLES:742        return get_error_message(743            "Global Table with this name already exists",744            "GlobalTableAlreadyExistsException",745        )746    DynamoDBRegion.GLOBAL_TABLES[table_name] = data747    for group in data.get("ReplicationGroup", []):748        group["ReplicaStatus"] = "ACTIVE"749        group["ReplicaStatusDescription"] = "Replica active"750    result = {"GlobalTableDescription": data}751    return result752def describe_global_table(data):753    table_name = data["GlobalTableName"]754    details = DynamoDBRegion.GLOBAL_TABLES.get(table_name)755    if not details:756        return get_error_message(757            "Global Table with this name does not exist", "GlobalTableNotFoundException"758        )759    result = {"GlobalTableDescription": details}760    return result761def list_global_tables(data):762    result = [763        select_attributes(tab, ["GlobalTableName", "ReplicationGroup"])764        for tab in DynamoDBRegion.GLOBAL_TABLES.values()765    ]766    result = {"GlobalTables": result}767    return result768def update_global_table(data):769    table_name = data["GlobalTableName"]770    details = DynamoDBRegion.GLOBAL_TABLES.get(table_name)771    if not details:772        return get_error_message(773            "Global Table with this name does not exist", "GlobalTableNotFoundException"774        )775    for update in data.get("ReplicaUpdates", []):776        repl_group = details["ReplicationGroup"]777        # delete existing778        delete = update.get("Delete")779        if delete:780            details["ReplicationGroup"] = [781                g for g in repl_group if g["RegionName"] != delete["RegionName"]782            ]783        # create new784        create = update.get("Create")785        if create:786            exists = [g for g in repl_group if g["RegionName"] == create["RegionName"]]787            if exists:788                continue789            new_group = {790                "RegionName": create["RegionName"],791                "ReplicaStatus": "ACTIVE",792                "ReplicaStatusDescription": "Replica active",793            }794            details["ReplicationGroup"].append(new_group)795    result = {"GlobalTableDescription": details}796    return result797def is_index_query_valid(table_name, index_query_type):798    schema = get_table_schema(table_name)799    for index in schema["Table"].get("GlobalSecondaryIndexes", []):800        index_projection_type = index.get("Projection").get("ProjectionType")801        if index_query_type == "ALL_ATTRIBUTES" and index_projection_type != "ALL":802            return False803    return True804def has_event_sources_or_streams_enabled(table_name, cache={}):805    if not table_name:806        return807    table_arn = aws_stack.dynamodb_table_arn(table_name)808    cached = cache.get(table_arn)809    if isinstance(cached, bool):810        return cached811    sources = lambda_api.get_event_sources(source_arn=table_arn)812    result = False813    if sources:814        result = True815    if not result and dynamodbstreams_api.get_stream_for_table(table_arn):816        result = True817    cache[table_arn] = result818    # if kinesis streaming destination is enabled819    # get table name from table_arn820    # since batch_wrtie and transact write operations passing table_arn instead of table_name821    table_name = table_arn.split("/", 1)[-1]822    table_definitions = DynamoDBRegion.get().table_definitions823    if not result and table_definitions.get(table_name):824        if table_definitions[table_name].get("KinesisDataStreamDestinationStatus") == "ACTIVE":825            result = True826    return result827def get_table_schema(table_name):828    key = "%s/%s" % (aws_stack.get_region(), table_name)829    schema = SCHEMA_CACHE.get(key)830    if not schema:831        ddb_client = aws_stack.connect_to_service("dynamodb")832        schema = ddb_client.describe_table(TableName=table_name)833        SCHEMA_CACHE[key] = schema834    return schema835def find_existing_item(put_item, table_name=None):836    table_name = table_name or put_item["TableName"]837    ddb_client = aws_stack.connect_to_service("dynamodb")838    search_key = {}839    if "Key" in put_item:840        search_key = put_item["Key"]841    else:842        schema = get_table_schema(table_name)843        schemas = [schema["Table"]["KeySchema"]]844        for index in schema["Table"].get("GlobalSecondaryIndexes", []):845            # TODO846            # schemas.append(index['KeySchema'])847            pass848        for schema in schemas:849            for key in schema:850                key_name = key["AttributeName"]851                search_key[key_name] = put_item["Item"][key_name]852        if not search_key:853            return854    req = {"TableName": table_name, "Key": search_key}855    existing_item = aws_stack.dynamodb_get_item_raw(req)856    if not existing_item:857        return existing_item858    if "Item" not in existing_item:859        if "message" in existing_item:860            table_names = ddb_client.list_tables()["TableNames"]861            msg = "Unable to get item from DynamoDB (existing tables: %s ...truncated if >100 tables): %s" % (862                table_names,863                existing_item["message"],864            )865            LOGGER.warning(msg)866        return867    return existing_item.get("Item")868def get_error_message(message, error_type):869    response = error_response(message=message, error_type=error_type)870    fix_headers_for_updated_response(response)871    return response872def get_table_not_found_error():873    return get_error_message(874        message="Cannot do operations on a non-existent table",875        error_type="ResourceNotFoundException",876    )877def fix_headers_for_updated_response(response):878    response.headers["Content-Length"] = len(to_bytes(response.content))879    response.headers["x-amz-crc32"] = calculate_crc32(response)880def update_response_content(response, content, status_code=None):881    aws_responses.set_response_content(response, content)882    if status_code:883        response.status_code = status_code884    fix_headers_for_updated_response(response)885def update_put_item_response_content(data, response_content):886    # when return-values variable is set only then attribute data should be returned887    # in the response otherwise by default is should not return any data.888    # https://github.com/localstack/localstack/issues/2121889    if data.get("ReturnValues"):890        response_content = json.dumps({"Attributes": data["Item"]})891    return response_content892def calculate_crc32(response):893    return crc32(to_bytes(response.content)) & 0xFFFFFFFF894def create_dynamodb_stream(data, latest_stream_label):895    stream = data["StreamSpecification"]896    enabled = stream.get("StreamEnabled")897    if enabled not in [False, "False"]:898        table_name = data["TableName"]899        view_type = stream["StreamViewType"]900        dynamodbstreams_api.add_dynamodb_stream(901            table_name=table_name,902            latest_stream_label=latest_stream_label,903            view_type=view_type,904            enabled=enabled,905        )906def forward_to_lambda(records):907    for record in records:908        sources = lambda_api.get_event_sources(source_arn=record["eventSourceARN"])909        event = {"Records": [record]}910        for src in sources:911            if src.get("State") != "Enabled":912                continue913            lambda_api.run_lambda(914                func_arn=src["FunctionArn"],915                event=event,916                context={},917                asynchronous=not config.SYNCHRONOUS_DYNAMODB_EVENTS,918            )919def forward_to_ddb_stream(records):920    dynamodbstreams_api.forward_events(records)921def forward_to_kinesis_stream(records):922    kinesis = aws_stack.connect_to_service("kinesis")923    table_definitions = DynamoDBRegion.get().table_definitions924    for record in records:925        if record.get("eventSourceARN"):926            table_name = record["eventSourceARN"].split("/", 1)[-1]927            table_def = table_definitions.get(table_name) or {}928            if table_def.get("KinesisDataStreamDestinationStatus") == "ACTIVE":929                stream_name = table_def["KinesisDataStreamDestinations"][-1]["StreamArn"].split(930                    "/", 1931                )[-1]932                record["tableName"] = table_name933                record.pop("eventSourceARN", None)934                record["dynamodb"].pop("StreamViewType", None)935                partition_key = list(936                    filter(lambda key: key["KeyType"] == "HASH", table_def["KeySchema"])937                )[0]["AttributeName"]938                kinesis.put_record(939                    StreamName=stream_name,940                    Data=json.dumps(record),941                    PartitionKey=partition_key,942                )943def dynamodb_extract_keys(item, table_name):944    result = {}945    table_definitions = DynamoDBRegion.get().table_definitions946    if table_name not in table_definitions:947        LOGGER.warning("Unknown table: %s not found in %s" % (table_name, table_definitions))948        return None949    for key in table_definitions[table_name]["KeySchema"]:950        attr_name = key["AttributeName"]951        if attr_name not in item:952            return error_response(953                error_type="ValidationException",954                message="One of the required keys was not given a value",955            )956        result[attr_name] = item[attr_name]957    return result958def dynamodb_get_table_stream_specification(table_name):959    try:960        return get_table_schema(table_name)["Table"].get("StreamSpecification")961    except Exception as e:962        LOGGER.info(963            "Unable to get stream specification for table %s : %s %s"964            % (table_name, e, traceback.format_exc())965        )966        raise e967def is_kinesis_stream_exists(stream_arn):968    # connect to kinesis969    kinesis = aws_stack.connect_to_service("kinesis")970    stream_name_from_arn = stream_arn.split("/", 1)[1]971    # check if the stream exists in kinesis for the user972    filtered = list(973        filter(974            lambda stream_name: stream_name == stream_name_from_arn,975            kinesis.list_streams()["StreamNames"],976        )977    )978    return bool(filtered)979def dynamodb_enable_kinesis_streaming_destination(data, table_def):980    if table_def.get("KinesisDataStreamDestinationStatus") in [981        "DISABLED",...
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