Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Angular DI Processor Pattern
Search
Jecelyn Yeen
September 27, 2018
Programming
0
1k
Angular DI Processor Pattern
Implement Processor Pattern with Angular Dependency Injection
Jecelyn Yeen
September 27, 2018
Tweet
Share
More Decks by Jecelyn Yeen
See All by Jecelyn Yeen
WorkerConf 2021 - Browser automation with Puppeteer
jecfish
0
1.7k
My Journey as Technical Presenter
jecfish
0
930
Becoming a GDE
jecfish
0
3.7k
How to get started in IT Freelancing
jecfish
1
270
New Web API & Stylings
jecfish
3
680
如何打造高性能且SEO友好的单页应用(SPA)
jecfish
2
830
JS SEO
jecfish
4
1.5k
Web Performance Optimization
jecfish
5
1.7k
Have Fun with Angular
jecfish
0
95
Other Decks in Programming
See All in Programming
Claude Codeの使い方
ttnyt8701
1
130
GraphRAGの仕組みまるわかり
tosuri13
7
460
型付きアクターモデルがもたらす分散シミュレーションの未来
piyo7
0
800
Gleamという選択肢
comamoca
6
740
Kotlin エンジニアへ送る:Swift 案件に参加させられる日に備えて~似てるけど色々違う Swift の仕様 / from Kotlin to Swift
lovee
1
250
Team topologies and the microservice architecture: a synergistic relationship
cer
PRO
0
950
生成AIで日々のエラー調査を進めたい
yuyaabo
0
630
たった 1 枚の PHP ファイルで実装する MCP サーバ / MCP Server with Vanilla PHP
okashoi
1
150
XP, Testing and ninja testing
m_seki
2
140
Cline指示通りに動かない? AI小説エージェントで学ぶ指示書の書き方と自動アップデートの仕組み
kamomeashizawa
1
560
AIネイティブなプロダクトをGolangで挑む取り組み
nmatsumoto4
0
120
関数型まつりレポート for JuliaTokai #22
antimon2
0
130
Featured
See All Featured
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
Building Adaptive Systems
keathley
43
2.6k
Fantastic passwords and where to find them - at NoRuKo
philnash
51
3.3k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
46
9.6k
How STYLIGHT went responsive
nonsquared
100
5.6k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
48
2.8k
A designer walks into a library…
pauljervisheath
206
24k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
29
9.5k
Docker and Python
trallard
44
3.4k
Side Projects
sachag
455
42k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.7k
Transcript
Angular | Dependency Injection | Processor Pattern + +
@JecelynYeen From Kuala Lumpur, Malaysia • GDE - Web technologies,
Angular • Software Architect @ Randstad Organizer:
• Dependency Injection (DI) • DI in Angular • Processor
Pattern • DI + Processor Pattern in Angular + +
Dependency Injection . What & Why?
Weapon is made of material (wood). Ninja needs a weapon
(nunchakus). We have a ninja.
- Single Responsibility - Tightly coupled - Hard to unit
test
Dependency Injection
Hookup implementation during bootstrap inject in constructor no need to
instantiate
Replace implementation under the hood
Dependency Injection • Unit testable • Reusability • Loosely coupled
• Dependency Inversion principle
DI in Angular
service service hook up
• UseClass • UseValue • UseFactory • UseExisting + https://offering.solutions/blog/articles/2018/08/17/using-useclass-usefactory-usevalue-
useexisting-with-treeshakable-providers-in-angular/ https://blog.thoughtram.io/angular/2015/05/18/dependency-injection-in-angular-2.html
Dependency Injection is static
Dependency Injection is static hook up only once
what if our ninja need to switch weapon dynamically https://di-processor.firebaseapp.com/ninja-di
what if our ninja need to switch weapon dynamically https://di-processor.firebaseapp.com/ninja-di
nunchakus, dart, stick, sword
Processor Pattern using injection token & multi-provider
weapon interface name, draw(), animate() Inject into NinjaComponent as weapon[
] injection token processors multi-providers
Injection Token + Processor Interface
Processor implement the interface
Multiple providers with same token one token multiple implementations set
as multi
Inject multiple providers Injection 4 processors get one processor Invoke
processor functions
Production Use Case: Chart Processors
- chart type - title / menu - processing logic
- labels & tooltips Differences - they are all charts - same interface:- - processData() - name, title, etc Similar https://di-processor.firebaseapp.com
YYYY-MM what users want to see YYYY-MM-DD what backend returns
Frontend developer
what your chart library wants what you need to do
• transform data (loop & group it by year month) • sort it • generate chart configuration
What you actually do - Chart Processor https://github.com/chybie/di-processor/blob/master/src/app/chart-di/services/chart-new-starter-processor.service.ts private
Injection Token + Processor Interface
Multiple providers with same token
Dashboard Component
Other useful scenario • Data table processors • Search processors
https://stackoverflow.com/questions/48382323/angular-lookup-all- providers-implementing-a-specific-interface/ 48383858#comment83773434_48383858
Benefits • Abstraction • Plugins
slides: https://speakerdeck.com/chybie/angular-di-processor-pattern demo: https://di-processor.firebaseapp.com code: https://github.com/chybie/di-processor code (inject by service):
https://stackblitz.com/edit/ninja-weapon- processors?file=src%2Fapp%2Fninja%2Fninja.component.ts twitter: @JecelynYeen + +