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How to use get_resource_model_instance method in localstack

Best Python code snippet using localstack_python
template_deployer.py
Source:template_deployer.py
...162            % (resource_id, resource, resources)163        )164    try:165        # convert resource props to resource entity166        instance = get_resource_model_instance(resource_id, resources)167        if instance:168            state = instance.fetch_and_update_state(stack_name=stack_name, resources=resources)169            return state170        # special case for stack parameters171        if resource_type == "Parameter":172            return resource_props173        # fallback: try accessing stack.moto_resource_statuses174        stack = find_stack(stack_name)175        moto_resource = stack.moto_resource_statuses.get(resource_id)176        if moto_resource:177            return moto_resource178        # if is_deployable_resource(resource):179        LOG.warning(180            "Unexpected resource type %s when resolving references of resource %s: %s"181            % (resource_type, resource_id, resource)182        )183    except DependencyNotYetSatisfied:184        return185    except Exception as e:186        check_not_found_exception(e, resource_type, resource, resource_status)187    return None188def check_not_found_exception(e, resource_type, resource, resource_status=None):189    # we expect this to be a "not found" exception190    markers = [191        "NoSuchBucket",192        "ResourceNotFound",193        "NoSuchEntity",194        "NotFoundException",195        "404",196        "not found",197        "not exist",198    ]199    if not list(filter(lambda marker, e=e: marker in str(e), markers)):200        LOG.warning(201            "Unexpected error retrieving details for resource type %s: Exception: %s - %s - status: %s"202            % (resource_type, e, resource, resource_status)203        )204        return False205    return True206def extract_resource_attribute(207    resource_type,208    resource_state,209    attribute,210    resource_id=None,211    resource=None,212    resources=None,213    stack_name=None,214):215    LOG.debug("Extract resource attribute: %s %s" % (resource_type, attribute))216    is_ref_attribute = attribute in ["PhysicalResourceId", "Ref"]217    is_ref_attr_or_arn = is_ref_attribute or attribute == "Arn"218    resource = resource or {}219    if not resource and resources:220        resource = resources[resource_id]221    if not resource_state:222        resource_state = retrieve_resource_details(resource_id, {}, resources, stack_name)223        if not resource_state:224            raise DependencyNotYetSatisfied(225                resource_ids=resource_id,226                message='Unable to fetch details for resource "%s" (attribute "%s")'227                % (resource_id, attribute),228            )229    if isinstance(resource_state, MotoCloudFormationModel):230        if is_ref_attribute:231            res_phys_id = getattr(resource_state, "physical_resource_id", None)232            get_res_phys_id = getattr(resource_state, "get_physical_resource_id", None)233            if not res_phys_id and get_res_phys_id:234                res_phys_id = get_res_phys_id(attribute)235            if res_phys_id:236                return res_phys_id237        if hasattr(resource_state, "get_cfn_attribute"):238            try:239                return resource_state.get_cfn_attribute(attribute)240            except Exception:241                pass242        raise Exception(243            'Unable to extract attribute "%s" from "%s" model class %s'244            % (attribute, resource_type, type(resource_state))245        )246    # extract resource specific attributes247    # TODO: remove the code below - move into resource model classes!248    resource_props = resource.get("Properties", {})249    if resource_type == "Parameter":250        result = None251        param_value = resource_props.get(252            "Value",253            resource.get("Value", resource_props.get("Properties", {}).get("Value")),254        )255        if is_ref_attr_or_arn:256            result = param_value257        elif isinstance(param_value, dict):258            result = param_value.get(attribute)259        if result is not None:260            return result261        return ""262    elif resource_type == "Lambda::Function":263        func_configs = resource_state.get("Configuration") or {}264        if is_ref_attr_or_arn:265            func_arn = func_configs.get("FunctionArn")266            if func_arn:267                return resolve_refs_recursively(stack_name, func_arn, resources)268            func_name = resolve_refs_recursively(269                stack_name, func_configs.get("FunctionName"), resources270            )271            return aws_stack.lambda_function_arn(func_name)272        else:273            return func_configs.get(attribute)274    elif resource_type == "Lambda::Version":275        if resource_state.get("Version"):276            return "%s:%s" % (277                resource_state.get("FunctionArn"),278                resource_state.get("Version").split(":")[-1],279            )280    elif resource_type == "DynamoDB::Table":281        actual_attribute = "LatestStreamArn" if attribute == "StreamArn" else attribute282        value = resource_state.get("Table", {}).get(actual_attribute)283        if value:284            return value285    elif resource_type == "ApiGateway::RestApi":286        if is_ref_attribute:287            result = resource_state.get("id")288            if result:289                return result290        if attribute == "RootResourceId":291            api_id = resource_state["id"]292            resources = aws_stack.connect_to_service("apigateway").get_resources(restApiId=api_id)[293                "items"294            ]295            for res in resources:296                if res["path"] == "/" and not res.get("parentId"):297                    return res["id"]298    elif resource_type == "ApiGateway::Resource":299        if is_ref_attribute:300            return resource_state.get("id")301    elif resource_type == "ApiGateway::Deployment":302        if is_ref_attribute:303            return resource_state.get("id")304    elif resource_type == "S3::Bucket":305        if attribute == "WebsiteURL":306            bucket_name = resource_props.get("BucketName")307            return f"http://{bucket_name}.{S3_STATIC_WEBSITE_HOSTNAME}"308        if is_ref_attr_or_arn:309            bucket_name = resource_props.get("BucketName")310            bucket_name = resolve_refs_recursively(stack_name, bucket_name, resources)311            if attribute == "Arn":312                return aws_stack.s3_bucket_arn(bucket_name)313            return bucket_name314    elif resource_type == "Elasticsearch::Domain":315        if attribute == "DomainEndpoint":316            domain_status = resource_state.get("DomainStatus", {})317            result = domain_status.get("Endpoint")318            if result:319                return result320        if attribute in ["Arn", "DomainArn"]:321            domain_name = resource_props.get("DomainName") or resource_state.get("DomainName")322            return aws_stack.es_domain_arn(domain_name)323    elif resource_type == "StepFunctions::StateMachine":324        if is_ref_attr_or_arn:325            return resource_state["stateMachineArn"]326    elif resource_type == "SNS::Topic":327        if is_ref_attribute and resource_state.get("TopicArn"):328            topic_arn = resource_state.get("TopicArn")329            return resolve_refs_recursively(stack_name, topic_arn, resources)330    elif resource_type == "SQS::Queue":331        if is_ref_attr_or_arn:332            if attribute == "Arn" and resource_state.get("QueueArn"):333                return resolve_refs_recursively(334                    stack_name, resource_state.get("QueueArn"), resources335                )336            return aws_stack.get_sqs_queue_url(resource_props.get("QueueName"))337    attribute_lower = common.first_char_to_lower(attribute)338    result = resource_state.get(attribute) or resource_state.get(attribute_lower)339    if result is None and isinstance(resource, dict):340        result = resource_props.get(attribute) or resource_props.get(attribute_lower)341        if result is None:342            result = get_attr_from_model_instance(343                resource,344                attribute,345                resource_type=resource_type,346                resource_id=resource_id,347            )348    if is_ref_attribute:349        for attr in ["Id", "PhysicalResourceId", "Ref"]:350            if result is None:351                for obj in [resource_state, resource]:352                    result = result or obj.get(attr)353    return result354def canonical_resource_type(resource_type):355    if "::" in resource_type and not resource_type.startswith("AWS::"):356        resource_type = "AWS::%s" % resource_type357    return resource_type358def get_attr_from_model_instance(resource, attribute, resource_type, resource_id=None):359    resource_type = canonical_resource_type(resource_type)360    model_class = RESOURCE_MODELS.get(resource_type)361    if not model_class:362        if resource_type not in ["AWS::Parameter", "Parameter"]:363            LOG.debug('Unable to find model class for resource type "%s"' % resource_type)364        return365    try:366        inst = model_class(resource_name=resource_id, resource_json=resource)367        return inst.get_cfn_attribute(attribute)368    except Exception:369        pass370def resolve_ref(stack_name, ref, resources, attribute):371    if ref == "AWS::Region":372        return aws_stack.get_region()373    if ref == "AWS::Partition":374        return "aws"375    if ref == "AWS::StackName":376        return stack_name377    if ref == "AWS::StackId":378        # TODO return proper stack id!379        return stack_name380    if ref == "AWS::AccountId":381        return TEST_AWS_ACCOUNT_ID382    if ref == "AWS::NoValue":383        return PLACEHOLDER_AWS_NO_VALUE384    if ref == "AWS::NotificationARNs":385        # TODO!386        return {}387    if ref == "AWS::URLSuffix":388        return AWS_URL_SUFFIX389    is_ref_attribute = attribute in ["Ref", "PhysicalResourceId", "Arn"]390    if is_ref_attribute:391        # extract the Properties here, as we only want to recurse over the resource props...392        resource_props = resources.get(ref, {}).get("Properties")393        resolve_refs_recursively(stack_name, resource_props, resources)394        return determine_resource_physical_id(395            resource_id=ref,396            resources=resources,397            attribute=attribute,398            stack_name=stack_name,399        )400    if resources.get(ref):401        if isinstance(resources[ref].get(attribute), (str, int, float, bool, dict)):402            return resources[ref][attribute]403    # fetch resource details404    resource_new = retrieve_resource_details(ref, {}, resources, stack_name)405    if not resource_new:406        raise DependencyNotYetSatisfied(407            resource_ids=ref,408            message='Unable to fetch details for resource "%s" (resolving attribute "%s")'409            % (ref, attribute),410        )411    resource = resources.get(ref)412    resource_type = get_resource_type(resource)413    result = extract_resource_attribute(414        resource_type,415        resource_new,416        attribute,417        resource_id=ref,418        resource=resource,419        resources=resources,420        stack_name=stack_name,421    )422    if result is None:423        LOG.warning(424            'Unable to extract reference attribute "%s" from resource: %s %s'425            % (attribute, resource_new, resource)426        )427    return result428# Using a @prevent_stack_overflow decorator here to avoid infinite recursion429# in case we load stack exports that have circular dependencies (see issue 3438)430# TODO: Potentially think about a better approach in the future431@prevent_stack_overflow(match_parameters=True)432def resolve_refs_recursively(stack_name, value, resources):433    if isinstance(value, dict):434        keys_list = list(value.keys())435        stripped_fn_lower = keys_list[0].lower().split("::")[-1] if len(keys_list) == 1 else None436        # process special operators437        if keys_list == ["Ref"]:438            ref = resolve_ref(stack_name, value["Ref"], resources, attribute="Ref")439            if ref is None:440                msg = 'Unable to resolve Ref for resource "%s" (yet)' % value["Ref"]441                LOG.debug("%s - %s" % (msg, resources.get(value["Ref"]) or set(resources.keys())))442                raise DependencyNotYetSatisfied(resource_ids=value["Ref"], message=msg)443            ref = resolve_refs_recursively(stack_name, ref, resources)444            return ref445        if stripped_fn_lower == "getatt":446            attr_ref = value[keys_list[0]]447            attr_ref = attr_ref.split(".") if isinstance(attr_ref, str) else attr_ref448            return resolve_ref(stack_name, attr_ref[0], resources, attribute=attr_ref[1])449        if stripped_fn_lower == "join":450            join_values = value[keys_list[0]][1]451            join_values = [resolve_refs_recursively(stack_name, v, resources) for v in join_values]452            none_values = [v for v in join_values if v is None]453            if none_values:454                raise Exception(455                    "Cannot resolve CF fn::Join %s due to null values: %s" % (value, join_values)456                )457            return value[keys_list[0]][0].join([str(v) for v in join_values])458        if stripped_fn_lower == "sub":459            item_to_sub = value[keys_list[0]]460            attr_refs = dict([(r, {"Ref": r}) for r in STATIC_REFS])461            if not isinstance(item_to_sub, list):462                item_to_sub = [item_to_sub, {}]463            result = item_to_sub[0]464            item_to_sub[1].update(attr_refs)465            for key, val in item_to_sub[1].items():466                val = resolve_refs_recursively(stack_name, val, resources)467                result = result.replace("${%s}" % key, val)468            # resolve placeholders469            result = resolve_placeholders_in_string(470                result, stack_name=stack_name, resources=resources471            )472            return result473        if stripped_fn_lower == "findinmap":474            attr = resolve_refs_recursively(stack_name, value[keys_list[0]][1], resources)475            result = resolve_ref(stack_name, value[keys_list[0]][0], resources, attribute=attr)476            if not result:477                raise Exception(478                    "Cannot resolve fn::FindInMap: %s %s"479                    % (value[keys_list[0]], list(resources.keys()))480                )481            key = value[keys_list[0]][2]482            if not isinstance(key, str):483                key = resolve_refs_recursively(stack_name, key, resources)484            return result.get(key)485        if stripped_fn_lower == "importvalue":486            import_value_key = resolve_refs_recursively(stack_name, value[keys_list[0]], resources)487            stack = find_stack(stack_name)488            stack_export = stack.exports_map.get(import_value_key) or {}489            if not stack_export.get("Value"):490                LOG.info(491                    'Unable to find export "%s" in stack "%s", existing export names: %s'492                    % (import_value_key, stack_name, list(stack.exports_map.keys()))493                )494                return None495            return stack_export["Value"]496        if stripped_fn_lower == "if":497            condition, option1, option2 = value[keys_list[0]]498            condition = evaluate_condition(stack_name, condition, resources)499            return resolve_refs_recursively(500                stack_name, option1 if condition else option2, resources501            )502        if stripped_fn_lower == "condition":503            result = evaluate_condition(stack_name, value[keys_list[0]], resources)504            return result505        if stripped_fn_lower == "not":506            condition = value[keys_list[0]][0]507            condition = resolve_refs_recursively(stack_name, condition, resources)508            return not condition509        if stripped_fn_lower in ["and", "or"]:510            conditions = value[keys_list[0]]511            results = [resolve_refs_recursively(stack_name, cond, resources) for cond in conditions]512            result = all(results) if stripped_fn_lower == "and" else any(results)513            return result514        if stripped_fn_lower == "equals":515            operand1, operand2 = value[keys_list[0]]516            operand1 = resolve_refs_recursively(stack_name, operand1, resources)517            operand2 = resolve_refs_recursively(stack_name, operand2, resources)518            return str(operand1) == str(operand2)519        if stripped_fn_lower == "select":520            index, values = value[keys_list[0]]521            index = resolve_refs_recursively(stack_name, index, resources)522            values = resolve_refs_recursively(stack_name, values, resources)523            return values[index]524        if stripped_fn_lower == "split":525            delimiter, string = value[keys_list[0]]526            delimiter = resolve_refs_recursively(stack_name, delimiter, resources)527            string = resolve_refs_recursively(stack_name, string, resources)528            return string.split(delimiter)529        if stripped_fn_lower == "getazs":530            region = (531                resolve_refs_recursively(stack_name, value["Fn::GetAZs"], resources)532                or aws_stack.get_region()533            )534            azs = []535            for az in ("a", "b", "c", "d"):536                azs.append("%s%s" % (region, az))537            return azs538        if stripped_fn_lower == "base64":539            value_to_encode = value[keys_list[0]]540            value_to_encode = resolve_refs_recursively(stack_name, value_to_encode, resources)541            return to_str(base64.b64encode(to_bytes(value_to_encode)))542        for key, val in dict(value).items():543            value[key] = resolve_refs_recursively(stack_name, val, resources)544    if isinstance(value, list):545        for i in range(len(value)):546            value[i] = resolve_refs_recursively(stack_name, value[i], resources)547    return value548def resolve_placeholders_in_string(result, stack_name=None, resources=None):549    def _replace(match):550        parts = match.group(1).split(".")551        if len(parts) >= 2:552            resource_name, _, attr_name = match.group(1).partition(".")553            resolved = resolve_ref(554                stack_name, resource_name.strip(), resources, attribute=attr_name.strip()555            )556            if resolved is None:557                raise DependencyNotYetSatisfied(558                    resource_ids=resource_name,559                    message="Unable to resolve attribute ref %s" % match.group(1),560                )561            return resolved562        if len(parts) == 1 and parts[0] in resources:563            resource_json = resources[parts[0]]564            resource_type = get_resource_type(resource_json)565            result = extract_resource_attribute(566                resource_type,567                {},568                "Ref",569                resources=resources,570                resource_id=parts[0],571                stack_name=stack_name,572            )573            if result is None:574                raise DependencyNotYetSatisfied(575                    resource_ids=parts[0],576                    message="Unable to resolve attribute ref %s" % match.group(1),577                )578            return result579        # TODO raise exception here?580        return match.group(0)581    regex = r"\$\{([^\}]+)\}"582    result = re.sub(regex, _replace, result)583    return result584def evaluate_condition(stack_name, condition, resources):585    condition = resolve_refs_recursively(stack_name, condition, resources)586    condition = resolve_ref(stack_name, condition, resources, attribute="Ref")587    condition = resolve_refs_recursively(stack_name, condition, resources)588    return condition589def evaluate_resource_condition(resource, stack_name, resources):590    condition = resource.get("Condition")591    if condition:592        condition = evaluate_condition(stack_name, condition, resources)593        if condition is False or condition in FALSE_STRINGS or is_none_or_empty_value(condition):594            return False595    return True596def get_stack_parameter(stack_name, parameter):597    try:598        client = aws_stack.connect_to_service("cloudformation")599        stack = client.describe_stacks(StackName=stack_name)["Stacks"]600    except Exception:601        return None602    stack = stack and stack[0]603    if not stack:604        return None605    result = [p["ParameterValue"] for p in stack["Parameters"] if p["ParameterKey"] == parameter]606    return (result or [None])[0]607def update_resource(resource_id, resources, stack_name):608    resource = resources[resource_id]609    resource_type = get_resource_type(resource)610    if resource_type not in UPDATEABLE_RESOURCES:611        LOG.warning('Unable to update resource type "%s", id "%s"' % (resource_type, resource_id))612        return613    LOG.info("Updating resource %s of type %s" % (resource_id, resource_type))614    instance = get_resource_model_instance(resource_id, resources)615    if instance:616        result = instance.update_resource(resource, stack_name=stack_name, resources=resources)617        instance.fetch_and_update_state(stack_name=stack_name, resources=resources)618        return result619def get_resource_model_instance(resource_id: str, resources) -> Optional[GenericBaseModel]:620    """Obtain a typed resource entity instance representing the given stack resource."""621    resource = resources[resource_id]622    resource_type = get_resource_type(resource)623    canonical_type = canonical_resource_type(resource_type)624    resource_class = RESOURCE_MODELS.get(canonical_type)625    if not resource_class:626        return None627    instance = resource_class(resource)628    return instance629def fix_account_id_in_arns(params):630    def fix_ids(o, **kwargs):631        if isinstance(o, dict):632            for k, v in o.items():633                if common.is_string(v, exclude_binary=True):...
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