@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
102 lines • 15.2 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CustomResource = void 0;
const cfn_resource_1 = require("./cfn-resource");
const removal_policy_1 = require("./removal-policy");
const resource_1 = require("./resource");
const token_1 = require("./token");
/**
* Custom resource that is implemented using a Lambda.
*
* As a custom resource author, you should be publishing a subclass of this class
* that hides the choice of provider, and accepts a strongly-typed properties
* object with the properties your provider accepts.
*
* @resource AWS::CloudFormation::CustomResource
*/
class CustomResource extends resource_1.Resource {
/**
*
*/
constructor(scope, id, props) {
var _a;
super(scope, id);
const type = renderResourceType(props.resourceType);
const pascalCaseProperties = (_a = props.pascalCaseProperties) !== null && _a !== void 0 ? _a : false;
const properties = pascalCaseProperties ? uppercaseProperties(props.properties || {}) : (props.properties || {});
this.resource = new cfn_resource_1.CfnResource(this, 'Default', {
type,
properties: {
ServiceToken: props.serviceToken,
...properties,
},
});
this.resource.applyRemovalPolicy(props.removalPolicy, {
default: removal_policy_1.RemovalPolicy.DESTROY,
});
}
/**
* The physical name of this custom resource.
*/
get ref() {
return this.resource.ref;
}
/**
* Returns the value of an attribute of the custom resource of an arbitrary type.
*
* Attributes are returned from the custom resource provider through the
* `Data` map where the key is the attribute name.
*
* @param attributeName the name of the attribute.
* @returns a token for `Fn::GetAtt`. Use `Token.asXxx` to encode the returned `Reference` as a specific type or
* use the convenience `getAttString` for string attributes.
*/
getAtt(attributeName) {
return this.resource.getAtt(attributeName);
}
/**
* Returns the value of an attribute of the custom resource of type string.
*
* Attributes are returned from the custom resource provider through the
* `Data` map where the key is the attribute name.
*
* @param attributeName the name of the attribute.
* @returns a token for `Fn::GetAtt` encoded as a string.
*/
getAttString(attributeName) {
return token_1.Token.asString(this.getAtt(attributeName));
}
}
exports.CustomResource = CustomResource;
/**
* Uppercase the first letter of every property name
*
* It's customary for CloudFormation properties to start with capitals, and our
* properties to start with lowercase, so this function translates from one
* to the other
*/
function uppercaseProperties(props) {
const ret = {};
Object.keys(props).forEach(key => {
const upper = key.substr(0, 1).toUpperCase() + key.substr(1);
ret[upper] = props[key];
});
return ret;
}
function renderResourceType(resourceType) {
if (!resourceType) {
return 'AWS::CloudFormation::CustomResource';
}
if (!resourceType.startsWith('Custom::')) {
throw new Error(`Custom resource type must begin with "Custom::" (${resourceType})`);
}
const typeName = resourceType.substr(resourceType.indexOf('::') + 2);
if (typeName.length > 60) {
throw new Error(`Custom resource type length > 60 (${resourceType})`);
}
if (!/^[a-z0-9_@-]+$/i.test(typeName)) {
throw new Error(`Custom resource type name can only include alphanumeric characters and _@- (${typeName})`);
}
return resourceType;
}
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{ Construct } from 'constructs';\nimport { CfnResource } from './cfn-resource';\nimport { RemovalPolicy } from './removal-policy';\nimport { Resource } from './resource';\nimport { Token } from './token';\n\n                                                                \nexport interface CustomResourceProps {\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             \n  readonly serviceToken: string;\n\n                                                                                     \n  readonly properties?: { [key: string]: any };\n\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   \n  readonly resourceType?: string;\n\n                                                                                                                                     \n  readonly removalPolicy?: RemovalPolicy;\n\n                                                                                   \n  readonly pascalCaseProperties?: boolean;\n}\n\n                                                                                                                                                                                                                                                                                                                                         \nexport class CustomResource extends Resource {\n  private readonly resource: CfnResource;\n\n  constructor(scope: Construct, id: string, props: CustomResourceProps) {\n    super(scope, id);\n\n    const type = renderResourceType(props.resourceType);\n    const pascalCaseProperties = props.pascalCaseProperties ?? false;\n    const properties = pascalCaseProperties ? uppercaseProperties(props.properties || {}) : (props.properties || {});\n\n    this.resource = new CfnResource(this, 'Default', {\n      type,\n      properties: {\n        ServiceToken: props.serviceToken,\n        ...properties,\n      },\n    });\n\n    this.resource.applyRemovalPolicy(props.removalPolicy, {\n      default: RemovalPolicy.DESTROY,\n    });\n  }\n\n                                                           \n  public get ref() {\n    return this.resource.ref;\n  }\n\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                          \n  public getAtt(attributeName: string) {\n    return this.resource.getAtt(attributeName);\n  }\n\n                                                                                                                                                                                                                                                                                                                                              \n  public getAttString(attributeName: string): string {\n    return Token.asString(this.getAtt(attributeName));\n  }\n}\n\n/**\n * Uppercase the first letter of every property name\n *\n * It's customary for CloudFormation properties to start with capitals, and our\n * properties to start with lowercase, so this function translates from one\n * to the other\n */\nfunction uppercaseProperties(props: { [key: string]: any }) {\n  const ret: { [key: string]: any } = {};\n  Object.keys(props).forEach(key => {\n    const upper = key.substr(0, 1).toUpperCase() + key.substr(1);\n    ret[upper] = props[key];\n  });\n  return ret;\n}\n\nfunction renderResourceType(resourceType?: string) {\n  if (!resourceType) {\n    return 'AWS::CloudFormation::CustomResource';\n  }\n\n  if (!resourceType.startsWith('Custom::')) {\n    throw new Error(`Custom resource type must begin with \"Custom::\" (${resourceType})`);\n  }\n\n  const typeName = resourceType.substr(resourceType.indexOf('::') + 2);\n  if (typeName.length > 60) {\n    throw new Error(`Custom resource type length > 60 (${resourceType})`);\n  }\n\n  if (!/^[a-z0-9_@-]+$/i.test(typeName)) {\n    throw new Error(`Custom resource type name can only include alphanumeric characters and _@- (${typeName})`);\n  }\n\n  return resourceType;\n}\n"]}