@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
119 lines • 15.4 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CfnRefElement = exports.CfnElement = void 0;
const cxschema = require("@aws-cdk/cloud-assembly-schema");
const constructs_1 = require("constructs");
// v2 - keep this import as a separate section to reduce merge conflict when forward merging with the v2 branch.
// eslint-disable-next-line
const construct_compat_1 = require("./construct-compat");
const lazy_1 = require("./lazy");
const CFN_ELEMENT_SYMBOL = Symbol.for('@aws-cdk/core.CfnElement');
/**
* An element of a CloudFormation stack.
*/
class CfnElement extends construct_compat_1.Construct {
/**
* Creates an entity and binds it to a tree.
*
* Note that the root of the tree must be a Stack object (not just any Root).
*
* @param scope The parent construct.
*/
constructor(scope, id) {
super(scope, id);
Object.defineProperty(this, CFN_ELEMENT_SYMBOL, { value: true });
this.stack = stack_1.Stack.of(this);
this.logicalId = lazy_1.Lazy.stringValue({ produce: () => this.synthesizeLogicalId() }, {
displayHint: `${notTooLong(constructs_1.Node.of(this).path)}.LogicalID`,
});
constructs_1.Node.of(this).addMetadata(cxschema.ArtifactMetadataEntryType.LOGICAL_ID, this.logicalId, this.constructor);
}
/**
* Returns `true` if a construct is a stack element (i.e. part of the synthesized cloudformation template).
*
* Uses duck-typing instead of `instanceof` to allow stack elements from different
* versions of this library to be included in the same stack.
*
* @returns The construct as a stack element or undefined if it is not a stack element.
*/
static isCfnElement(x) {
return CFN_ELEMENT_SYMBOL in x;
}
/**
* Overrides the auto-generated logical ID with a specific ID.
*
* @param newLogicalId The new logical ID to use for this stack element.
*/
overrideLogicalId(newLogicalId) {
this._logicalIdOverride = newLogicalId;
}
/**
* @returns the stack trace of the point where this Resource was created from, sourced
* from the +metadata+ entry typed +aws:cdk:logicalId+, and with the bottom-most
* node +internal+ entries filtered.
*/
get creationStack() {
const trace = constructs_1.Node.of(this).metadata.find(md => md.type === cxschema.ArtifactMetadataEntryType.LOGICAL_ID).trace;
if (!trace) {
return [];
}
return filterStackTrace(trace);
function filterStackTrace(stack) {
const result = Array.of(...stack);
while (result.length > 0 && shouldFilter(result[result.length - 1])) {
result.pop();
}
// It's weird if we filtered everything, so return the whole stack...
return result.length === 0 ? stack : result;
}
function shouldFilter(str) {
return str.match(/[^(]+\(internal\/.*/) !== null;
}
}
/**
* Called during synthesize to render the logical ID of this element. If
* `overrideLogicalId` was it will be used, otherwise, we will allocate the
* logical ID through the stack.
*/
synthesizeLogicalId() {
if (this._logicalIdOverride) {
return this._logicalIdOverride;
}
else {
return this.stack.getLogicalId(this);
}
}
}
exports.CfnElement = CfnElement;
/**
* Base class for referenceable CloudFormation constructs which are not Resources.
*
* These constructs are things like Conditions and Parameters, can be
* referenced by taking the `.ref` attribute.
*
* Resource constructs do not inherit from CfnRefElement because they have their
* own, more specific types returned from the .ref attribute. Also, some
* resources aren't referenceable at all (such as BucketPolicies or GatewayAttachments).
*/
class CfnRefElement extends CfnElement {
/**
* Return a string that will be resolved to a CloudFormation `{ Ref }` for this element.
*
* If, by any chance, the intrinsic reference of a resource is not a string, you could
* coerce it to an IResolvable through `Lazy.any({ produce: resource.ref })`.
*/
get ref() {
return token_1.Token.asString(cfn_reference_1.CfnReference.for(this, 'Ref'));
}
}
exports.CfnRefElement = CfnRefElement;
function notTooLong(x) {
if (x.length < 100) {
return x;
}
return x.substr(0, 47) + '...' + x.substr(x.length - 47);
}
const cfn_reference_1 = require("./private/cfn-reference");
const stack_1 = require("./stack");
const token_1 = require("./token");
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keep this import as a separate section to reduce merge conflict when forward merging with the v2 branch.\n// eslint-disable-next-line\nimport { Construct as CoreConstruct } from './construct-compat';\nimport { Lazy } from './lazy';\n\nconst CFN_ELEMENT_SYMBOL = Symbol.for('@aws-cdk/core.CfnElement');\n\n                                                \nexport abstract class CfnElement extends CoreConstruct {\n                                                                                                                                                                                                                                                                                                                                                                                       \n  public static isCfnElement(x: any): x is CfnElement {\n    return CFN_ELEMENT_SYMBOL in x;\n  }\n\n                                                                                                                                                                                                                                                                                                                                                                             \n  public readonly logicalId: string;\n\n                                                                                                                                       \n  public readonly stack: Stack;\n\n  /**\n   * An explicit logical ID provided by `overrideLogicalId`.\n   */\n  private _logicalIdOverride?: string;\n\n                                                                                                                                                                                                                             \n  constructor(scope: Construct, id: string) {\n    super(scope, id);\n\n    Object.defineProperty(this, CFN_ELEMENT_SYMBOL, { value: true });\n\n    this.stack = Stack.of(this);\n\n    this.logicalId = Lazy.stringValue({ produce: () => this.synthesizeLogicalId() }, {\n      displayHint: `${notTooLong(Node.of(this).path)}.LogicalID`,\n    });\n\n    Node.of(this).addMetadata(cxschema.ArtifactMetadataEntryType.LOGICAL_ID, this.logicalId, this.constructor);\n  }\n\n                                                                                                                                                       \n  public overrideLogicalId(newLogicalId: string) {\n    this._logicalIdOverride = newLogicalId;\n  }\n\n                                                                                                                                                                                                                                        \n  public get creationStack(): string[] {\n    const trace = Node.of(this).metadata.find(md => md.type === cxschema.ArtifactMetadataEntryType.LOGICAL_ID)!.trace;\n    if (!trace) {\n      return [];\n    }\n\n    return filterStackTrace(trace);\n\n    function filterStackTrace(stack: string[]): string[] {\n      const result = Array.of(...stack);\n      while (result.length > 0 && shouldFilter(result[result.length - 1])) {\n        result.pop();\n      }\n      // It's weird if we filtered everything, so return the whole stack...\n      return result.length === 0 ? stack : result;\n    }\n\n    function shouldFilter(str: string): boolean {\n      return str.match(/[^(]+\\(internal\\/.*/) !== null;\n    }\n  }\n\n  /**\n   * Returns the CloudFormation 'snippet' for this entity. The snippet will only be merged\n   * at the root level to ensure there are no identity conflicts.\n   *\n   * For example, a Resource class will return something like:\n   * {\n   *   Resources: {\n   *     [this.logicalId]: {\n   *       Type: this.resourceType,\n   *       Properties: this.props,\n   *       Condition: this.condition\n   *     }\n   *   }\n   * }\n   *\n   * @internal\n   */\n  public abstract _toCloudFormation(): object;\n\n  /**\n   * Called during synthesize to render the logical ID of this element. If\n   * `overrideLogicalId` was it will be used, otherwise, we will allocate the\n   * logical ID through the stack.\n   */\n  private synthesizeLogicalId() {\n    if (this._logicalIdOverride) {\n      return this._logicalIdOverride;\n    } else {\n      return this.stack.getLogicalId(this);\n    }\n  }\n}\n\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                      \nexport abstract class CfnRefElement extends CfnElement {\n                                                                                                                                                                                                                                                                                    \n  public get ref(): string {\n    return Token.asString(CfnReference.for(this, 'Ref'));\n  }\n}\n\nfunction notTooLong(x: string) {\n  if (x.length < 100) { return x; }\n  return x.substr(0, 47) + '...' + x.substr(x.length - 47);\n}\n\nimport { CfnReference } from './private/cfn-reference';\nimport { Stack } from './stack';\nimport { Token } from './token';\n"]}