App

class aws_cdk.core.App(*, auto_synth=None, context=None, outdir=None, runtime_info=None, stack_traces=None, tree_metadata=None)

Bases: aws_cdk.core.Stage

A construct which represents an entire CDK app. This construct is normally the root of the construct tree.

You would normally define an App instance in your program’s entrypoint, then define constructs where the app is used as the parent scope.

After all the child constructs are defined within the app, you should call app.synth() which will emit a “cloud assembly” from this app into the directory specified by outdir. Cloud assemblies includes artifacts such as CloudFormation templates and assets that are needed to deploy this app into the AWS cloud.

see :see: https://docs.aws.amazon.com/cdk/latest/guide/apps.html

__init__(*, auto_synth=None, context=None, outdir=None, runtime_info=None, stack_traces=None, tree_metadata=None)

Initializes a CDK application.

Parameters

  • auto_synth (Optional[bool]) – Automatically call synth() before the program exits. If you set this, you don’t have to call synth() explicitly. Note that this feature is only available for certain programming languages, and calling synth() is still recommended. Default: true if running via CDK CLI (CDK_OUTDIR is set), false otherwise

  • context (Optional[Mapping[str, Any]]) – Additional context values for the application. Context set by the CLI or the context key in cdk.json has precedence. Context can be read from any construct using node.getContext(key). Default: - no additional context

  • outdir (Optional[str]) – The output directory into which to emit synthesized artifacts. Default: - If this value is not set, considers the environment variable CDK_OUTDIR. If CDK_OUTDIR is not defined, uses a temp directory.

  • runtime_info (Optional[bool]) – Include runtime versioning information in cloud assembly manifest. Default: true runtime info is included unless aws:cdk:disable-runtime-info is set in the context.

  • stack_traces (Optional[bool]) – Include construct creation stack trace in the aws:cdk:trace metadata key of all constructs. Default: true stack traces are included unless aws:cdk:disable-stack-trace is set in the context.

  • tree_metadata (Optional[bool]) – Include construct tree metadata as part of the Cloud Assembly. Default: true

Return type

None

Methods

synth(*, force=None, skip_validation=None)

Synthesize this stage into a cloud assembly.

Once an assembly has been synthesized, it cannot be modified. Subsequent calls will return the same assembly.

Parameters

  • force (Optional[bool]) – Force a re-synth, even if the stage has already been synthesized. This is used by tests to allow for incremental verification of the output. Do not use in production. Default: false

  • skip_validation (Optional[bool]) – Should we skip construct validation. Default: - false

Return type

CloudAssembly

to_string()

Returns a string representation of this construct.

Return type

str

Attributes

account

The default account for all resources defined within this stage.

stability :stability: experimental

Return type

Optional[str]

artifact_id

Artifact ID of the assembly if it is a nested stage. The root stage (app) will return an empty string.

Derived from the construct path.

stability :stability: experimental

Return type

str

node

The construct tree node associated with this construct.

Return type

ConstructNode

outdir

The cloud assembly output directory.

Return type

str

parent_stage

The parent stage or undefined if this is the app.

stability :stability: experimental

Return type

Optional[Stage]

region

The default region for all resources defined within this stage.

stability :stability: experimental

Return type

Optional[str]

stage_name

The name of the stage.

Based on names of the parent stages separated by hypens.

stability :stability: experimental

Return type

str

Static Methods

classmethod is_app(obj)

Checks if an object is an instance of the App class.

Parameters

obj (Any) – The object to evaluate.

return :rtype: bool :return: true if obj is an App.

classmethod is_construct(x)

Return whether the given object is a Construct.

Parameters

x (Any) –

Return type

bool

classmethod is_stage(x)

Test whether the given construct is a stage.

Parameters

x (Any) –

stability :stability: experimental

Return type

bool

classmethod of(construct)

Return the stage this construct is contained with, if available.

If called on a nested stage, returns its parent.

Parameters

construct (IConstruct) –

stability :stability: experimental

Return type

Optional[Stage]