Oracle Code Online: Building a Serverless State Service for the Cloud

Copyright © 2017, Oracle and/or its affiliates. All rights reserved. |
Building a Serverless
State Service for the Cloud
Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Building Agile and Resilient Schema Transf. using Kafka and ESB's
Ed Burns
Oracle Developer Experience
November, 2017
@edburns

Speaker Qualifications – Ed Burns
• 25 years software development experience
• Java EE Spec Lead for JSF and Servlet
• Frequent conference speaker and workshop leader
• State Service contributor
• Author of four IT books for McGraw-Hill

Safe Harbor Statement
The following is intended to outline our general product direction. It is intended for
information purposes only, and may not be incorporated into any contract. It is not a
commitment to deliver any material, code, or functionality, and should not be relied upon
in making purchasing decisions. The development, release, and timing of any features or
functionality described for Oracle’s products remains at the sole discretion of Oracle.
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Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | 5
Stateless == Useless
E

What can you do without state?
• result = (input) -> convert(input);
• Make it the callers problem:
– hotPotato = (input) -> convert(input);
doSomethingWith(hotPotato);
• Externalize the state
– Consistency
– Performance
6
H

State and Serverless
7
Somebody Else’s Problem

8
Somebody Else’s Problem

• We’ve been trying to reduce
“boiler-plate” since we invented
boilers.
9
The Relentless Drive To Allow Developers to Focus on “Business Logic”

• The very idea of separating
– Core language
– Runtime libraries
10
The Relentless Drive To Allow Developers to Focus on “Business Logic”

• Dependency Injection
– Spring 1.0 2002
– JSF 1.0 2004
• @Inject 2009
• Containerization 2014
• Containerization and Cloud 2015
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The Logical Extension of Dependency Injection

Convinced you need state?? OK – now where does it go?
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What do you need from a store of state?
• Durability
• Reliability/HA
• Scalability
• Throughput
• In-Place Processing
• Querying/Aggregations
• Events
• Access with programming language of choice
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What do you need from a store of state?
• On-demand provisioning/elasticity
• ”Serverless” operating paradigm
• Managed by vendor
• Pay as you go/utility
computing pricing
• Smooth on-ramp
– Local development
– Cloud development
14
H
…in the cloud?

What do you want from a store of state?
• Native language support
• What’s wrong with Map, Dictionary, Hash Container, Associative Array?
• It has everything; rows (entries), columns (inferred by fields)
• And its key-centric: I think I can scale this puppy…
• …but its stuck on the heap!
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Map: if you can dream it, you can do it…
• HashMap:
– Hashing semantics, in-process, not thread-safe
• Collections.synchronizedMap(map):
– Hashing semantics, in-process, thread-safe, coarse contention
• ConcurrentHashMap
– Hashing semantics, in-process, thread-safe granular contention
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Map: if you can dream it, you can do it…
• CloudMap:
– Hashing semantics, highly distributed, multi process & thread!
– Map-based API that we plan to produce as one of the State Service APIs
17
Introducing CloudMap
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Map: what you give us for free…
• Key-centric; get(k), put(k, v), remove(k) …
• HashMap: table[hash(key) % table.length] = new Entry(key, value)
• ConcurrentHashMap: lock(table[hash(key) % table.length]) && assign
• DistributedHashMap : hash(key) -> partition/bucket -> member
– Common approach: consistent hashing (hash(key) -> member)
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LOCALREMOTE
H

Serverless State Service
CloudMap == DistributedMap++
19
BARE METAL CLOUD COHERENCE
E

20
BARE METAL CLOUD COHERENCE
E

One State Service – Many Languages
21

CloudMap
H

• Distributed persistence (patented)
– Shared storage is not required…and discouraged
– Supports snapshots and ‘archiving’ distributed state
23
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Vista Demo
Serverless
Function as a
Service for any
language, best of
class for Java
Microservices
A collection of
services, frameworks
and libraries for the
modern cloud
developer; based on
Cloud Native
Compute Foundation
fn
State
State
A scalable,
resilient state
store based
on common
data
structures
E
24

Vista License Plate Demo
25
Java Functions
Scraper Detect Plates
Alert
Alert Manager
Detect Duplicates
Draw
Progress Publish
E

26
Helping Services and Code
Alert
Alert Manager
Detect Duplicates
Draw
Progress Publish
E

27
State Service Interactions
Alert
Alert Manager
Detect Duplicates
Draw
Progress Publish
E

• Infinitely scalable
• Resilient
• Continuously available
• A ubiquitously understood programming model
• Data local processing
• Pay-as-you-go
Coming to a cloud near you…
28
H

Safe Harbor Statement
The preceding is intended to outline our general product direction. It is intended for
information purposes only, and may not be incorporated into any contract. It is not a
commitment to deliver any material, code, or functionality, and should not be relied upon
in making purchasing decisions. The development, release, and timing of any features or
functionality described for Oracle’s products remains at the sole discretion of Oracle.
29

Oracle Code Online: Building a Serverless State Service for the Cloud

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