This AWS Lambda that posts an Ably message to S3

s3lamdba

package example;

import com.amazonaws.AmazonServiceException;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.amazonaws.services.lambda.runtime.LambdaLogger;

import com.amazonaws.SdkClientException;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import java.io.File;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Map;

import static java.lang.Thread.sleep;

// Handler value: example.Handler
public class Handler implements RequestHandler<Map<String,Object>, String>{
  Gson gson = new GsonBuilder().setPrettyPrinting().create();
  @Override
  public String handleRequest(Map<String,Object> event, Context context)
  {
    LambdaLogger logger = context.getLogger();
    String response = new String("400 fail");

    for (Map.Entry<String, Object> entry : event.entrySet()) {
      logger.log("EVENT: " + (entry));
    }

    DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
    LocalDateTime now = LocalDateTime.now();
    //System.out.println();

    Regions clientRegion = Regions.EU_WEST_2;
    String bucketName = "log-storage-demo";
    String stringObjKeyName = dtf.format(now);

    try {

       AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
              .withRegion(clientRegion)
              .build();

      // Upload a text string as a new object.
      s3Client.putObject(bucketName, stringObjKeyName, "EVENT: " +String.valueOf(event));

      response = new String("200 " +
              "ok");
    } catch (AmazonServiceException e) {
      // The call was transmitted successfully, but Amazon S3 couldn't process
      // it, so it returned an error response.
      response = new String("400 " +
              "fail");
      e.printStackTrace();
    } catch (SdkClientException e) {
      // Amazon S3 couldn't be contacted for a response, or the client
      // couldn't parse the response from Amazon S3.
      response = new String("400 " +
              "fail");
      e.printStackTrace();
    }
    return response;
  }
}