使用支援的 AWS CDK 程式設計語言

TypeScript 支援匯入整個命名空間，或從命名空間匯入個別物件。每個命名空間都包含可與指定 AWS 服務搭配使用的建構和其他類別。

// Import main CDK library as cdk
import * as cdk from 'aws-cdk-lib';   // ES6 import preferred in TS
const cdk = require('aws-cdk-lib');   // Node.js require() preferred in JS

// Import specific core CDK classes
import { Stack, App } from 'aws-cdk-lib';
const { Stack, App } = require('aws-cdk-lib');

// Import AWS S3 namespace as s3 into current namespace
import { aws_s3 as s3 } from 'aws-cdk-lib';   // TypeScript
const s3 = require('aws-cdk-lib/aws-s3');     // JavaScript

// Having imported cdk already as above, this is also valid
const s3 = cdk.aws_s3;

// Now use s3 to access the S3 types
const bucket = s3.Bucket(...);

// Selective import of s3.Bucket
import { Bucket } from 'aws-cdk-lib/aws-s3';        // TypeScript
const { Bucket } = require('aws-cdk-lib/aws-s3');   // JavaScript

// Now use Bucket to instantiate an S3 bucket
const bucket = Bucket(...);

像 TypeScript Python 支持命名空間模塊導入和選擇性導入。Python 中的命名空間看起來像 aws_cdk。 xxx，其中 xxx 代表 AWS 服務名稱，例如 Amazon S3 的 s3。（這些示例中使用了 Amazon S3）。

# Import main CDK library as cdk
import aws_cdk as cdk

# Selective import of specific core classes
from aws_cdk import Stack, App
            
# Import entire module as s3 into current namespace
import aws_cdk.aws_s3 as s3

# s3 can now be used to access classes it contains
bucket = s3.Bucket(...)

# Selective import of s3.Bucket into current namespace
from aws_cdk.s3 import Bucket

# Bucket can now be used to instantiate a bucket
bucket = Bucket(...)

Java 的導入工作方 TypeScript式與. 每個 import 語句從給定的包或導入一個單一的類名，或者在該包中定義的所有類（使用*）。類可以使用任一類名本身，如果它已被導入，或包括它的包合格的類名進行訪問。

庫的命名類似software.amazon.awscdk.services.xxx於 AWS 構造庫（主庫是software.amazon.awscdk）。 AWS CDK 套件的 Maven 群組識別碼是software.amazon.awscdk。

// Make certain core classes available
import software.amazon.awscdk.Stack;
import software.amazon.awscdk.App;

// Make all Amazon S3 construct library classes available
import software.amazon.awscdk.services.s3.*;

// Make only Bucket and EventType classes available
import software.amazon.awscdk.services.s3.Bucket;
import software.amazon.awscdk.services.s3.EventType;

// An imported class may now be accessed using the simple class name (assuming that name
// does not conflict with another class)
Bucket bucket = Bucket.Builder.create(...).build();

// We can always use the qualified name of a class (including its package) even without an
// import directive
software.amazon.awscdk.services.s3.Bucket bucket = 
    software.amazon.awscdk.services.s3.Bucket.Builder.create(...)
        .build();
          
// Java 10 or later can use var keyword to avoid typing the type twice
var bucket = 
    software.amazon.awscdk.services.s3.Bucket.Builder.create(...)
        .build();

在 C# 中，您可以使用using指示詞匯入型別。有兩種樣式。一個使您可以通過使用它們的普通名稱訪問指定名稱空間中的所有類型。另一方面，您可以使用別名來引用命名空間本身。

包被命名Amazon.CDK.AWS.xxx為類似於 AWS 構造庫包。（核心模塊是Amazon.CDK。）

// Make CDK base classes available under cdk
using cdk = Amazon.CDK;

// Make all Amazon S3 construct library classes available
using Amazon.CDK.AWS.S3;

// Now we can access any S3 type using its name
var bucket = new Bucket(...);

// Import the S3 namespace under an alias
using s3 = Amazon.CDK.AWS.S3;

// Now we can access an S3 type through the namespace alias
var bucket = new s3.Bucket(...);

// We can always use the qualified name of a type (including its namespace) even without a
// using directive
var bucket = new Amazon.CDK.AWS.S3.Bucket(...)

每個「 AWS 建構程式庫」模組都是以 Go 套件的形式提供。

import (
    "github.com/aws/aws-cdk-go/awscdk/v2"           // CDK core package
    "github.com/aws/aws-cdk-go/awscdk/v2/awss3"     // AWS S3 construct library module
)

// now instantiate a bucket
bucket := awss3.NewBucket(...)

// use aliases for brevity/clarity
import (
    cdk "github.com/aws/aws-cdk-go/awscdk/v2"           // CDK core package
    s3  "github.com/aws/aws-cdk-go/awscdk/v2/awss3"     // AWS S3 construct library module
)

bucket := s3.NewBucket(...)

// Instantiate default Bucket
const bucket = new s3.Bucket(this, 'MyBucket');

// Instantiate Bucket with bucketName and versioned properties
const bucket = new s3.Bucket(this, 'MyBucket', {
  bucketName: 'my-bucket',
   versioned: true,
});

// Instantiate Bucket with websiteRedirect, which has its own sub-properties
const bucket = new s3.Bucket(this, 'MyBucket', {
  websiteRedirect: {host: 'aws.amazon.com'}});

Python 在實例化類時不使用new關鍵字。屬性參數使用關鍵字參數表示，並使用命名參數snake_case。

如果 prop 值本身就是一組屬性，則會以屬性命名的類別來表示，該類別會接受子屬性的關鍵字引數。

在 Python 中，當前實例被傳遞給方法作為第一個參數，這是self由約定命名。

# Instantiate default Bucket
bucket = s3.Bucket(self, "MyBucket")

# Instantiate Bucket with bucket_name and versioned properties
bucket = s3.Bucket(self, "MyBucket", bucket_name="my-bucket", versioned=true)

# Instantiate Bucket with website_redirect, which has its own sub-properties
bucket = s3.Bucket(self, "MyBucket", website_redirect=s3.WebsiteRedirect(
            host_name="aws.amazon.com"))

在 Java 中，prop 參數由一個名為的類表示XxxxProps（例如，BucketProps對於Bucket構造的 prop）。您可以使用構建器模式構建道具參數。

每個XxxxProps類都有一個構建器。另外，每個建構都有一個方便的建構器，它們只需一個步驟即可建立道具和建構，如下列範例所示。

道具的名稱與中的名稱相同 TypeScript，使用camelCase。

// Instantiate default Bucket
Bucket bucket = Bucket(self, "MyBucket");

// Instantiate Bucket with bucketName and versioned properties
Bucket bucket = Bucket.Builder.create(self, "MyBucket")
                      .bucketName("my-bucket").versioned(true)
                      .build();

# Instantiate Bucket with websiteRedirect, which has its own sub-properties
Bucket bucket = Bucket.Builder.create(self, "MyBucket")
                      .websiteRedirect(new websiteRedirect.Builder()
                          .hostName("aws.amazon.com").build())
                      .build();

在 C＃ 中，prop 使用對象初始值設定項指定到名為的類XxxxProps（例如，BucketProps對於Bucket構造的 prop）。

道具的名稱類似於 TypeScript，除了使用PascalCase。

實例化構造時使用var關鍵字很方便，因此您不需要鍵入兩次類名。但是，您的本地代碼樣式指南可能會有所不同。

// Instantiate default Bucket
var bucket = Bucket(self, "MyBucket");

// Instantiate Bucket with BucketName and Versioned properties
var bucket =  Bucket(self, "MyBucket", new BucketProps {
                      BucketName = "my-bucket",
                      Versioned  = true});

// Instantiate Bucket with WebsiteRedirect, which has its own sub-properties
var bucket = Bucket(self, "MyBucket", new BucketProps {
                      WebsiteRedirect = new WebsiteRedirect {
                              HostName = "aws.amazon.com"
                      }});

要在 Go 中創建一個構造，請調用該函數，NewXxxxxx其中Xxxxxxx是構造的名稱。結構的屬性被定義為一個結構。

在 Go 中，所有構造參數都是指針，包括數字，布爾值和字符串等值。使用諸如jsii.String創建這些指針的便利功能。

	// Instantiate default Bucket
	bucket := awss3.NewBucket(stack, jsii.String("MyBucket"), nil)

	// Instantiate Bucket with BucketName and Versioned properties
	bucket1 := awss3.NewBucket(stack, jsii.String("MyBucket"), &awss3.BucketProps{
		BucketName: jsii.String("my-bucket"),
		Versioned:  jsii.Bool(true),
	})

	// Instantiate Bucket with WebsiteRedirect, which has its own sub-properties
	bucket2 := awss3.NewBucket(stack, jsii.String("MyBucket"), &awss3.BucketProps{
		WebsiteRedirect: &awss3.RedirectTarget{
			HostName: jsii.String("aws.amazon.com"),
		}})

名字是camelCase。

bucket.bucketArn

名字是snake_case。

bucket.bucket_arn

為每個屬性提供了 getter 方法；這些camelCase名稱為。

bucket.getBucketArn()

名字是PascalCase。

bucket.BucketArn

名字是PascalCase。

bucket.BucketArn

import { IAspect, IConstruct } from 'aws-cdk-lib';

class MyAspect implements IAspect {
  public visit(node: IConstruct) {
    console.log('Visited', node.node.path);
  }
}

Python 沒有一個接口功能。但是，對於 AWS CDK 你可以通過裝飾你的類來指示接口實現@jsii.implements(interface)。

from aws_cdk import IAspect, IConstruct
import jsii

@jsii.implements(IAspect)
class MyAspect():
  def visit(self, node: IConstruct) -> None:
    print("Visited", node.node.path)

import software.amazon.awscdk.IAspect;
import software.amazon.awscdk.IConstruct;

public class MyAspect implements IAspect {
    public void visit(IConstruct node) {
        System.out.format("Visited %s", node.getNode().getPath());
    }
}

using Amazon.CDK;

public class MyAspect : IAspect
{
    public void Visit(IConstruct node)
    {
        System.Console.WriteLine($"Visited ${node.Node.Path}");
    }
}

Go 結構不需要明確聲明它們實現的接口。Go 編譯器根據結構上可用的方法和屬性來確定實現。例如，在下列程式碼中，會MyAspect實作IAspect介面，因為它提供了採用建構的Visit方法。

type MyAspect struct {
}

func (a MyAspect) Visit(node constructs.IConstruct) {
	fmt.Println("Visited", *node.Node().Path())
}