Building Cloud Serverless Architectures with C++: The Future of On-Demand Applications

Cloud Serverless Architecture in C++: The Future of On-Demand Applications

Cloud serverless architecture is becoming a popular way to build applications , especially suitable for on-demand expansion. This guide walks you through building serverless applications in the cloud using C++.

Preparation

Make sure you have the following prerequisites:

• C++ compiler (such as Clang or GCC)
• Amazon Web Services (AWS) Account
• AWS CLI

Set up an AWS Serverless Environment

1. Install Serverless Framework:npm install -g serverless
2. Create the AWS credentials file (~/.aws/credentials): Contains your access key and key ID
3. Configure Serverless Framework: serverless config credentials --provider aws --key your_key_id --secret your_secret_key

Create serverless function

1. Create a new Node.js project: mkdir my-function && cd my-function
2. Initialize the Serverless project: serverless init --template helloworld

3. Modify handler.cpp to write your function in C++

   #include < aws/lambda/lambda.h >
   namespace lambda = Aws::Lambda;
   
   using namespace function::helloworld;
   
   int main(int argc, char** argv) {
     auto handler = lambda::MakeHandler<hello_world, Input, Output>();
     return lambda::RunWithHandler(handler, argc, argv);
   }

Deploy function

1. Modify serverless.yml to specify function configuration:

   provider:
     name: aws
     runtime: cpp17
   functions:
     hello:
       handler: handler.main

2. Deployment function: serverless deploy

Test function

1. Use AWS CLI to call the function: aws lambda invoke --function-name hello
2. View the results ：jq .Payload | base64 --decode

Actual case

Auto scaling image

Use serverless functions to automatically shrink images uploaded to Amazon S3.

1. Create S3 trigger function:

   functions:
     resize_image:
       handler: handler.main
       events:
         - s3:
             bucket: my-images
             event: s3:ObjectCreated:*

2. Shrink the image in the function:

   auto scaled_image = resize_image(input.file_name);
   
   Aws::S3::Model::PutObjectRequest request(s3_config.bucket(), scaled_image.file_name,
                                               scaled_image.data, scaled_image.data.length());
   s3_client.PutObject(request);

Conclusion

By using C++ to build a cloud serverless architecture, you can create applications that scale on demand, are cost-effective, and are easy to maintain. With this guide, you've acquired the skills you need to build your own serverless applications.

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