This document summarizes a presentation about serverless and mobile applications. It includes: - An introduction focusing on startups, mobile apps, serverless computing, blockchain, and fintech. - Details about AWS AppSync and its Todo data model. - Information on request and response mapping templates in AWS Lambda. - An overview of delta sync using AppSync, base queries, subscriptions, and delta queries. - Notes on serverless technologies like AWS Lambda and its supported runtimes. - Resources on serverless best practices and architectures using Lambda, API Gateway, and other AWS services.

1. [re:Cap] Serverless & Mobile
Akihiro Tsukada, Senior Startup Solutions Architect
Amazon Web Services Japan K.K.
Morning Session

2. Name: Akihiro Tsukada
ID: akitsukada
Focus:
- Start-ups
- Mobile Apps
- Serverless
- Blockchain
- FinTech

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7. AWS AppSync
type Todo {
id: ID!
name: String
description: String
priority: Int
duedate: String
}
HTTP

8. Http
Query / mutation
Query / mutation

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1. BEFORE mapping template
2. f1 Function Request Mapping Template
3. f1 Data source invocation
4. f1 Function Response Mapping Template
5. f2 Function Request Mapping Template
6. f2 Data source invocation
7. f2 Function Response Mapping Template
8. AFTER mapping template

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Delta ( ) :
BaseQuery

11. deltaWatcher = appSyncClient?.sync(
baseQuery: allPostsBaseQuery,
baseQueryResultHandler: { (result, error) in
// handle base query
},
subscription: postsSubscription,
subscriptionResultHandler: { (result, transaction, error) in
// handle subscription
},
deltaQuery: allPostsDeltaQuery,
deltaQueryResultHandler: { (result, transaction, error) in
// handle delta query
}
)
//Stop DeltaSync
deltaWatcher.cancel();

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13. npm install -g @aws-amplify/cli@multienv

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17. • 2.7/3.6
3.7
• Lambda

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https://www.slideshare.net/AmazonWebServices/a-serverless-journey-aws-lambda-under-the-hood-srv409r1-aws-reinvent-2018

21. https://www.slideshare.net/AmazonWebServices/a-serverless-journey-aws-lambda-under-the-hood-srv409r1-aws-reinvent-2018

23. •
KVM
VM
• Lambda Fargate
• 125ms
VM 5MiB
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https://github.com/firecracker-microvm/firecracker

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• Apache License, Version 2.0
• 2018/12/17 PyCharm GA IntelliJ
Visual Studio Code
• AWS Serverless Application Model(SAM) CLI

32. • AWS Lambda Ruby
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ü Python 2.7, 3.6, 3.7
ü Node.js 4.3, 6.10, 8.10
ü .NET Core 1.0(C#), 2.0(C#), 2,1(C#/PowerShell)
ü Go 1.x
ü Java 8
ü Ruby
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33. 1 require 'json'
2 def handler(event: ev, context:ctx)
3 {event: JSON.generate(ev),
4 context: JSON.generate(ctx.inspect)}
5 end
• --path vendor/bundle bundle install

34. 1 module LambdaFunctions
2 class Handler
3 def self.process(event:,context:)
4 "Hello!"
5 end
6 end
7 end
source.LambdaFunctions::Handler.process.

35. • Linux
Lambda
• Runtime API
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ü
ü https://github.com/awslabs/aws-lambda-rust-runtime
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37. • Lambda
Lambda Layer

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• 250MB
• Layer zip or S3
• Python – python, python/lib/python3.7/site-packages (site directories)
• Node.js – nodejs/node_modules, nodejs/node8/node_modules (NODE_PATH)
https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html

39. • python pip
node.js npm
• util
Layer

44. • ALB Lambda
• Lambda
HTTP
• Web
Lambda
• ALB

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47. B 4 =A0=2
6 - / ,
B 4 =A0=2 2 = 6
0 6 : = 0B 0
= 0 : 6 6
0 6 "
0 : 2 2 40

48. https://docs.aws.amazon.com/lambda/latest/dg/services-alb.html

50. • Step Functions AWS
Lambda
ü DynamoDB: item item
ü AWS Batch:
ü Amazon ECS/Fargate: ECS Fargate
ü Amazon SNS: SNS
ü Amazon SQS:
ü AWS Glue:
ü Amazon SageMaker:

51. • WebSocket
API API Gateway
• WebSocket API
• AWS Lambda
AWS
EC2
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52. • AWS SAM AWS Serverless Application Repository
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• CloudFormation
• SAM
AWS:Serverless:Application

53. Thank you