Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Fifty shades
of Serverless

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Speaker me = new Speaker(”Mattias Jiderhamn”);
me.setEmployer(”Solid Beans”);
me.setJavaEnthusiast(true);
me.addAchievemnt(Achievement.JavaOneRockStar);
me.setTwitterHandle(”@mjiderhamn”)
me.setBlog(”java.jiderhamn.se”)

Copyright©SolidBeansAB
it’s just someone else’s computer
There is no Cloud

Copyright©SolidBeansAB
it’s just someone else’s server
There is no Serverless

Copyright©SolidBeansAB
Serverless
=
Function as a Service
=
FaaS

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Monolith Microservices Serverless

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Monolith Microservices FaaS
Monolith
Function
Microservice
Microservice
Microservice
Function
Function
Function
Function
Function

Copyright©SolidBeansAB
Serverless
offerings

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
AWS Lambda Azure Functions Google Cloud Functions
Supported languages
/runtime
Java
Node.js
C#
Python
(Go, Rust via Apex)
Java (preview)
Node.js, TypeScript
C#, F#
Python
PHP
Batch, Bash, PowerShell
Node.js
Python
Offering Cloud
Cloud (Consumption vs Dedicated)
On Premise (Azure Stack)
Cloud
Free tier (per month)
1 M requests
400 k GB-s
1 M requests
400 k GB-s
2 M requests
400 k GB-s, 200 k GHz-s
5GB traffic
Pricing
(August 2018, Europe)
$0.20 / 1M requests
$0.00001667 / GB-s
$0.20 / 1M requests
$0.000016 / GB-s
$0.40 / 1M requests
$0.0000025 / GB-s
$0.00001 / GHz-s
$0.12 per GB traffic
The Big Three

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
IBM Cloud Functions Webtask Spotinst Functions
Supported languages
/runtime
Docker
Java
Node.js
Swift
Go
Scala
Python, PHP, Ruby
Bash
Node.js
Python
Ruby
Perl
Php
Lua, Babel, Coffee,
Scheme, Smalltalk, Tcl
Node.js
C#
T-SQL
Java
Go
Node.js
Ruby
Python
Node.js
Offering
Cloud
On Premise (OpenWhisk)
Cloud Cloud Multi cloud
Free tier (per month) 400 k GB-s 1 k requests 1 request/s
3 services
64 MB/service
Pricing
(August 2018)
$0.000017 / GB-s $10/25/50/200 / mth Spot pricing $5/30/150 / mth
The Challengers

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
OpenWhisk
Runs on Docker Kubernetes
Cloud (IBM)
Docker
Libraries for
Java
Go
Ruby
Python
PHP
Node.js
Java
Node.js
Python
Shell
Java
Node.js
Swift
Go
Scala
Python
PHP
Ruby
License Apache 2.0 Apache 2.0 Apache 2.0
The Open Source

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Runs on Kubernetes
Kubernetes
Docker Swarm
Kubernetes Docker
Libraries for
Node.js
.NET
Python
Ruby
PHP
Go
Ballerina
Java
C#
Node.js
Go
Python
Ruby
C#
Node.js
Python
Go
PHP
Go
Node.js
Ruby
License Apache 2.0 MIT Apache 2.0 Apache 2.0
The Open Source

Copyright©SolidBeansAB
it’s just someone else’s server
There is no Serverless

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Serverless-ishServerless

Copyright©SolidBeansAB
DEMO

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
HTTP API Gateway
HTTP
Web hooks (GitHub, Slack)
HTTP
Blob store S3 Blob storage Cloud Storage
DB DynamoDB
Cosmos DB
Table storage
Firebase
Messages SQS
Queue storage
Service Bus
Event Grid
Cloud Pub/Sub
Stream Kinesis Event Hub
Notifications SNS Notification Hub
Cron CloudWatch Events Timer
Event sources / Triggers

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
AWS Lamda event sources
• E-mail (Simple Email Service)
• Log (CloudWatch Log)
• Provisioning (CloudFormation)
• Infra events (CloudWatch Events)
• Git push (CodeCommit)
• Voice (Alexa)
• Conversation (Lex)
• Hardware (IoT Button)
• ...

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Azure Functions triggers
External file (experimental)
• Box
• Dropbox
• FTP/SFTP
• OneDrive
• Google Drive

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Caveats

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Cost management
• Pay-as-you-go
• Estimate memory usage and
invocation time
• More expensive = cheaper?
• Async operations/
background threads
• Low max time

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Logging
• ExecutionContext.getLogger()
• AWS: Log4j 2 appender
AWS Lambda
Log4J appender
CloudWatch
Logs

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Logging
• ExecutionContext.getLogger()
• AWS: Log4j 2 appender
• TCP appender
Function
Async appender
TCP appender

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Cold start
• 20-45 minutes of inactivity
• 30+ seconds start for Java
• Keep alive ping requests
–Azure: per Function App

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Vendor lock-in
• Vendor specific method signature
• Cloud Native Computing Foundation
(CNCF) working on standard
• Abstract the vendor specific
… or not

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Spring Cloud Function
• Decouple business logic and deployment
–Plain Old Function (POF)
• Spring Boot
–IoC etc
• On the fly string compilation
• Reactive Streams (Flux)

Copyright©SolidBeansAB
DEMO

Copyright©SolidBeansAB
Mattias Jiderhamn www.solidbeans.com
Ask not what you can do with

Copyright©SolidBeansAB
java.jiderhamn.se
github.com/mjiderhamn/
fifty-shades-of-serverless
@mjiderhamn