September 2012
Intermediate to advanced
888 pages
31h 30m
Polish
Content preview from Java. Praktyczne narzędzia
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13.2. Testowanie aplikacji frameworku Struts
Typowe aplikacje platformy J2EE składają się z kilku warstw (patrz Rysunek 13-1):
Rysunek 13-1. Typowa architektura aplikacji platformy J2EE
Warstwa obiektów DAO obejmuje logikę odpowiedzialną za obsługę dostępu do bazy danych. Warstwa DAO zawiera zapytania frameworku Hibernate, elementy interfejsu JPA, encyjne komponenty EJB lub elementy innej encyjno-relacyjnej technologii utrwalania danych.
Warstwa biznesowa zawiera usługi biznesowe wyższego poziomu. W idealnych warunkach warstwa biznesowa jest względnie niezależna od implementacji bazy danych. W tej warstwie z reguły stosuje się na przykład sesyjne komponenty ...
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