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Exemples de code pour Lambda utilisant AWS SDKs
Les exemples de code suivants montrent comment utiliser Lambda avec un kit de développement AWS logiciel ()SDK.
Les principes de base sont des exemples de code qui vous montrent comment effectuer les opérations essentielles au sein d'un service.
Les actions sont des extraits de code de programmes plus larges et doivent être exécutées dans leur contexte. Alors que les actions vous montrent comment appeler des fonctions de service individuelles, vous pouvez les visualiser dans leur contexte dans leurs scénarios associés.
Les scénarios sont des exemples de code qui vous montrent comment accomplir des tâches spécifiques en appelant plusieurs fonctions au sein d'un service ou en les combinant à d'autres Services AWS.
Pour obtenir la liste complète des guides AWS SDK de développement et des exemples de code, consultezUtilisation de Lambda avec un AWS SDK. Cette rubrique inclut également des informations sur la mise en route et des détails sur SDK les versions précédentes.
Mise en route
Les exemples de code suivants montrent comment démarrer avec Lambda.
- .NET
-
- AWS SDK for .NET
-
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}");
});
}
}
- C++
-
- SDKpour C++
-
Code du fichier CMakeLists CMake .txt.
# 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})
Code pour le fichier source hello_lambda.cpp.
#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;
}
- Go
-
- SDKpour Go V2
-
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() {
sdkConfig, err := config.LoadDefaultConfig(context.TODO())
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(context.TODO(), &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)
}
}
}
- Java
-
- SDKpour Java 2.x
-
package com.example.lambda;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.lambda.LambdaClient;
import software.amazon.awssdk.services.lambda.model.LambdaException;
import software.amazon.awssdk.services.lambda.model.ListFunctionsResponse;
import software.amazon.awssdk.services.lambda.model.FunctionConfiguration;
import java.util.List;
/**
* Before running this Java V2 code example, set up your development
* environment, including your credentials.
*
* For more information, see the following documentation topic:
*
* https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
*/
public class ListLambdaFunctions {
public static void main(String[] args) {
Region region = Region.US_WEST_2;
LambdaClient awsLambda = LambdaClient.builder()
.region(region)
.build();
listFunctions(awsLambda);
awsLambda.close();
}
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);
}
}
}
- JavaScript
-
- SDKpour JavaScript (v3)
-
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;
};
- Python
-
- SDKpour Python (Boto3)
-
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()
- Ruby
-
- SDKpour Ruby
-
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
