开始使用 Lambda - Amazon Lambda
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开始使用 Lambda

以下代码示例展示了如何开始使用 Lambda。

.NET
Amazon SDK for .NET
注意

查看 GitHub,了解更多信息。查找完整示例,学习如何在 Amazon 代码示例存储库中进行设置和运行。

namespace LambdaActions; using Amazon.Lambda; public class HelloLambda { static async Task Main(string[] args) { var lambdaClient = new AmazonLambdaClient(); Console.WriteLine("Hello AWS Lambda"); Console.WriteLine("Let's get started with AWS Lambda by listing your existing Lambda functions:"); var response = await lambdaClient.ListFunctionsAsync(); response.Functions.ForEach(function => { Console.WriteLine($"{function.FunctionName}\t{function.Description}"); }); } }
  • 有关 API 的详细信息,请参阅 Amazon SDK for .NET API 参考中的 ListFunctions

C++
SDK for C++
注意

查看 GitHub,了解更多信息。查找完整示例,学习如何在 Amazon 代码示例存储库中进行设置和运行。

CMakeLists.txt CMake 文件的代码。

# Set the minimum required version of CMake for this project. cmake_minimum_required(VERSION 3.13) # Set the AWS service components used by this project. set(SERVICE_COMPONENTS lambda) # Set this project's name. project("hello_lambda") # Set the C++ standard to use to build this target. # At least C++ 11 is required for the AWS SDK for C++. set(CMAKE_CXX_STANDARD 11) # Use the MSVC variable to determine if this is a Windows build. set(WINDOWS_BUILD ${MSVC}) if (WINDOWS_BUILD) # Set the location where CMake can find the installed libraries for the AWS SDK. string(REPLACE ";" "/aws-cpp-sdk-all;" SYSTEM_MODULE_PATH "${CMAKE_SYSTEM_PREFIX_PATH}/aws-cpp-sdk-all") list(APPEND CMAKE_PREFIX_PATH ${SYSTEM_MODULE_PATH}) endif () # Find the AWS SDK for C++ package. find_package(AWSSDK REQUIRED COMPONENTS ${SERVICE_COMPONENTS}) if (WINDOWS_BUILD AND AWSSDK_INSTALL_AS_SHARED_LIBS) # Copy relevant AWS SDK for C++ libraries into the current binary directory for running and debugging. # set(BIN_SUB_DIR "/Debug") # if you are building from the command line you may need to uncomment this # and set the proper subdirectory to the executables' location. AWSSDK_CPY_DYN_LIBS(SERVICE_COMPONENTS "" ${CMAKE_CURRENT_BINARY_DIR}${BIN_SUB_DIR}) endif () add_executable(${PROJECT_NAME} hello_lambda.cpp) target_link_libraries(${PROJECT_NAME} ${AWSSDK_LINK_LIBRARIES})

hello_lambda.cpp 源文件的代码。

#include <aws/core/Aws.h> #include <aws/lambda/LambdaClient.h> #include <aws/lambda/model/ListFunctionsRequest.h> #include <iostream> /* * A "Hello Lambda" starter application which initializes an AWS Lambda (Lambda) client and lists the Lambda functions. * * main function * * Usage: 'hello_lambda' * */ int main(int argc, char **argv) { Aws::SDKOptions options; // Optionally change the log level for debugging. // options.loggingOptions.logLevel = Utils::Logging::LogLevel::Debug; Aws::InitAPI(options); // Should only be called once. int result = 0; { Aws::Client::ClientConfiguration clientConfig; // Optional: Set to the AWS Region (overrides config file). // clientConfig.region = "us-east-1"; Aws::Lambda::LambdaClient lambdaClient(clientConfig); std::vector<Aws::String> functions; Aws::String marker; // Used for pagination. do { Aws::Lambda::Model::ListFunctionsRequest request; if (!marker.empty()) { request.SetMarker(marker); } Aws::Lambda::Model::ListFunctionsOutcome outcome = lambdaClient.ListFunctions( request); if (outcome.IsSuccess()) { const Aws::Lambda::Model::ListFunctionsResult &listFunctionsResult = outcome.GetResult(); std::cout << listFunctionsResult.GetFunctions().size() << " lambda functions were retrieved." << std::endl; for (const Aws::Lambda::Model::FunctionConfiguration &functionConfiguration: listFunctionsResult.GetFunctions()) { functions.push_back(functionConfiguration.GetFunctionName()); std::cout << functions.size() << " " << functionConfiguration.GetDescription() << std::endl; std::cout << " " << Aws::Lambda::Model::RuntimeMapper::GetNameForRuntime( functionConfiguration.GetRuntime()) << ": " << functionConfiguration.GetHandler() << std::endl; } marker = listFunctionsResult.GetNextMarker(); } else { std::cerr << "Error with Lambda::ListFunctions. " << outcome.GetError().GetMessage() << std::endl; result = 1; break; } } while (!marker.empty()); } Aws::ShutdownAPI(options); // Should only be called once. return result; }
  • 有关 API 的详细信息,请参阅 Amazon SDK for C++ API 参考中的 ListFunctions

Go
适用于 Go V2 的 SDK
注意

查看 GitHub,了解更多信息。查找完整示例,学习如何在 Amazon 代码示例存储库中进行设置和运行。

package main import ( "context" "fmt" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/config" "github.com/aws/aws-sdk-go-v2/service/lambda" ) // main uses the AWS SDK for Go (v2) to create an AWS Lambda client and list up to 10 // functions in your account. // This example uses the default settings specified in your shared credentials // and config files. func main() { ctx := context.Background() sdkConfig, err := config.LoadDefaultConfig(ctx) if err != nil { fmt.Println("Couldn't load default configuration. Have you set up your AWS account?") fmt.Println(err) return } lambdaClient := lambda.NewFromConfig(sdkConfig) maxItems := 10 fmt.Printf("Let's list up to %v functions for your account.\n", maxItems) result, err := lambdaClient.ListFunctions(ctx, &lambda.ListFunctionsInput{ MaxItems: aws.Int32(int32(maxItems)), }) if err != nil { fmt.Printf("Couldn't list functions for your account. Here's why: %v\n", err) return } if len(result.Functions) == 0 { fmt.Println("You don't have any functions!") } else { for _, function := range result.Functions { fmt.Printf("\t%v\n", *function.FunctionName) } } }
  • 有关 API 的详细信息,请参阅 适用于 Go 的 Amazon SDK API 参考中的 ListFunctions

Java
适用于 Java 的 SDK 2.x
注意

查看 GitHub,了解更多信息。查找完整示例,学习如何在 Amazon 代码示例存储库中进行设置和运行。

/** * Lists the AWS Lambda functions associated with the current AWS account. * * @param awsLambda an instance of the {@link LambdaClient} class, which is used to interact with the AWS Lambda service * * @throws LambdaException if an error occurs while interacting with the AWS Lambda service */ public static void listFunctions(LambdaClient awsLambda) { try { ListFunctionsResponse functionResult = awsLambda.listFunctions(); List<FunctionConfiguration> list = functionResult.functions(); for (FunctionConfiguration config : list) { System.out.println("The function name is " + config.functionName()); } } catch (LambdaException e) { System.err.println(e.getMessage()); System.exit(1); } }
  • 有关 API 的详细信息,请参阅 Amazon SDK for Java 2.x API 参考中的 ListFunctions

JavaScript
适用于 JavaScript 的 SDK(v3)
注意

查看 GitHub,了解更多信息。查找完整示例,学习如何在 Amazon 代码示例存储库中进行设置和运行。

import { LambdaClient, paginateListFunctions } from "@aws-sdk/client-lambda"; const client = new LambdaClient({}); export const helloLambda = async () => { const paginator = paginateListFunctions({ client }, {}); const functions = []; for await (const page of paginator) { const funcNames = page.Functions.map((f) => f.FunctionName); functions.push(...funcNames); } console.log("Functions:"); console.log(functions.join("\n")); return functions; };
  • 有关 API 的详细信息,请参阅 Amazon SDK for JavaScript API 参考中的 ListFunctions

Python
适用于 Python 的 SDK(Boto3)
注意

查看 GitHub,了解更多信息。查找完整示例,学习如何在 Amazon 代码示例存储库中进行设置和运行。

import boto3 def main(): """ List the Lambda functions in your AWS account. """ # Create the Lambda client lambda_client = boto3.client("lambda") # Use the paginator to list the functions paginator = lambda_client.get_paginator("list_functions") response_iterator = paginator.paginate() print("Here are the Lambda functions in your account:") for page in response_iterator: for function in page["Functions"]: print(f" {function['FunctionName']}") if __name__ == "__main__": main()
  • 有关 API 详细信息,请参阅《Amazon SDK for Python (Boto3) API 参考》中的 ListFunctions

Ruby
适用于 Ruby 的 SDK
注意

查看 GitHub,了解更多信息。查找完整示例,学习如何在 Amazon 代码示例存储库中进行设置和运行。

require 'aws-sdk-lambda' # Creates an AWS Lambda client using the default credentials and configuration def lambda_client Aws::Lambda::Client.new end # Lists the Lambda functions in your AWS account, paginating the results if necessary def list_lambda_functions lambda = lambda_client # Use a pagination iterator to list all functions functions = [] lambda.list_functions.each_page do |page| functions.concat(page.functions) end # Print the name and ARN of each function functions.each do |function| puts "Function name: #{function.function_name}" puts "Function ARN: #{function.function_arn}" puts end puts "Total functions: #{functions.count}" end list_lambda_functions if __FILE__ == $PROGRAM_NAME
  • 有关 API 的详细信息,请参阅 Amazon SDK for Ruby API 参考中的 ListFunctions

有关 Amazon SDK 开发人员指南和代码示例的完整列表,请参阅 将 Lambda 与 Amazon SDK 配合使用。本主题还包括有关入门的信息以及有关先前的 SDK 版本的详细信息。