Architecture and RxJava
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Slides of the talk Jolanda Verhoef gave at the BABBQ Europe 2016.
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Architecture and RxJava
- 2. Blendle Makes the world’s best journalism available to everyone, everywhere @lojanda
- 3. Blendle Makes the world’s best journalism available to everyone, everywhere @lojanda
- 5. Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities @lojanda
- 7. Today’s subjects Building standalone UI components Building real standalone UI components Synchronising UI components throughout the app Updating lists after user interaction @lojanda
- 8. Today’s subjects Building standalone UI components Building real standalone UI components Synchronising UI components throughout the app Updating lists after user interaction @lojanda
- 9. Standalone UI components Opening the Blendle Reader @lojanda
- 10. Standalone UI components Opening the Blendle Reader @lojanda
- 11. Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities @lojanda
- 12. ArticlePreviewRepository public Single<ArticlePreview> articlePreview$( String articleId ) { if ( cache.contains( articleId ) { return Single.just( cache.retrieve( articleId )); } else { return urlResolver.urlFor( articleId ) .flatMap( blendleApi::articlePreview$ ) .doOnSuccess( cache::store ); } } @lojanda Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 13. GetArticlePreviewUseCase public Single<ArticlePreview> execute( String articleId ) { return articleRepository.articlePreview$( articleId ) .subscribeOn( Schedulers.io() ) .observeOn( AndroidSchedulers.mainThread() ); } @lojanda Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 14. ReaderPresenter public void init( String articleId ) { getArticlePreviewUseCase.execute( articleId ) .subscribe( getView()::showArticlePreview, getView()::loadArticlePreviewFailed ); } @lojanda Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 15. Today’s subjects Building standalone UI components Building real standalone UI components Synchronising UI components throughout the app Updating lists after user interaction @lojanda
- 16. Standalone UI components++ Inside the Blendle Reader @lojanda
- 19. @lojanda ReaderFragment Toolbar Featured Image RecyclerView Publisher Logo Bookmark Icon Share Icon Text Row Image Row ……. Row
- 20. Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities @lojanda
- 21. @lojanda
- 22. ArticleContextStore private BehaviorSubject<String> subject; public void changeArticleContext( final String newArticleId ) { subject.onNext( newArticleId ); } @lojanda Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 23. Reader @Override public View onCreateView( … ) { presenter.init( getArguments() != null ? getArguments().getInt( EXTRA_ARTICLE_ID ) : null ); } @lojanda public void init( @Nullable String articleId ) { if( articleId == null) articleId = articleContextStore.getArticleContext(); loadData( articleId ); } VIEWPRESENTER Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 24. Today’s subjects Building standalone UI components Building real standalone UI components Synchronising UI components throughout the app Updating lists after user interaction @lojanda
- 25. Synchronising UI components Bookmarking an article @lojanda
- 26. Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities @lojanda
- 27. Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities BookmarkStore private Map<String, BehaviorSubject<Boolean>> subjectMap; public BehaviorSubject<Boolean> getBookmarked( String articleId ) { if( subjectMap.contains( articleId ) return subjectMap.get( articleId ); BehaviorSubject<Boolean> subject = BehaviorSubject.create(); subjectMap.put( articleId, subject ); return subject; } public void setBookmarked( String articleId, Boolean bookmarked ) { getBookmarked().onNext( bookmarked ); } @lojanda
- 28. BookmarkRepository public Observable<Boolean> bookmarked$( String articleId ) { BehaviorSubject<Boolean> subject = bookmarkStore .getBookmarked( articleId ); if( ! subject.hasValue() ) { this.bookmarkedCall( articleId ) .subscribe( bookmarkStore::setBookmarked ); } return subject; } @lojanda Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 29. GetBookmarkUseCase public Observable<Boolean> execute( String articleId ) { return bookmarkRepository.bookmarked$( articleId ) .subscribeOn( Schedulers.io() ) .observeOn( AndroidSchedulers.mainThread() ); } @lojanda Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 30. BookmarkPresenter public void init( String articleId ) { getBookmarkUseCase.execute( articleId ) .subscribe( getView()::showBookmarkValue ); } @lojanda Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 31. Today’s subjects Building standalone UI components Building real standalone UI components Synchronising UI components throughout the app Updating lists after user interaction @lojanda
- 32. Updating lists Article reading list @lojanda
- 33. Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities @lojanda
- 34. @lojanda
- 35. Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities BookmarkStore private PublishSubject<Pair<String, Boolean>> subject; public Observable<Boolean> getBookmarkListener() { return subject; } public void setBookmarked( String articleId, Boolean bookmarked ) { getBookmarked( articleId ).onNext( bookmarked ); subject.onNext( new Pair<>( articleId, bookmarked ); } @lojanda
- 36. ReadingListPresenter public void init() { bookmarkStore.getBookmarkListener() .subscribe( this::bookmarkChanged ); } public void bookmarkChanged( Pair<String, Boolean> pair ) { String articleId = pair.first; Boolean newBookmarkValue = pair.second; if( newBookmarkValue ) { getView().addBookmark( articleId ); } else { getView().removeBookmark( articleId ); } } @lojanda Mutable Data Stores Context Stores Mutable Data Repositories Static Data Repositories Business Use Cases Presenters Custom Views Fragments Activities
- 37. Today’s subjects Building standalone UI components Building real standalone UI components Synchronising UI components throughout the app Updating lists after user interaction @lojanda