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Azure - How to add custom settings to a Windows Azure project

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In acest post o sa vedem cum se pot adauga configurari custom in cadrul proiectului Windows Azure, iar apoi sa le putem accesa din cod.
O parte din configurariile unei aplicatii se tin de obicei in fisierul de configurare (app.config sau web.config - de la caz la caz). Insa, cand lucram la un proiect care o sa ajunga in Windows Azure putem sa facem aceste configuratii si in alta locatie.
De exemplu putem ca aceste configuratii sa le tinem in proiectul de deploy pentru cloud. In felul acesta, putem sa avem mai multe configuratii pentru mai multe environment si/sau chiar sa avem configuratii diferite pentru local si cloud fara sa ne definim un mecanism special pentru acest caz.
Primul pas care trebuie facut este sa deschim fisierul ServiceDefinition.csdef din proiectul de deploy pentru Windows Azure. In cadrul acestuia sub nodul WebRole sau WorkerRole (depinde unde aveti nevoie) este nevoie sa adaugam un nod denumit ConfigurationSettings. In acesta este nevoie sa ne definim lista de configurari custom de care noi avem nevoie.
<WebRole name="Foo.Web" vmsize="Small">
<ConfigurationSettings>
    <Setting name="MyCustomFlag">
</onfigurationSettings>
</WebRole>
Odata ce am definit aceasta lista, o sa putem observa ca daca deschidem rolul pentru care am definit aceasta configuratie, putem sa gasim in tab-ul de Settings si configuratia noastra. Valoarea acestuia se poate seta si manual direct in fisierul ServiceConfiguration.Local.cscfg pentru local si ServiceConfiguration.Cloud.cscfg pentru versiunea care ajunge in cloud.
In interiorul acestui fisier in urmatoarea locatie "ServiceConfiguration/Role/ConfigurationSettings" este nevoie sa adaugam un nod care sa aibe urmatoarea forma:
<Settings name="MyCustomFlag" value="256" />
Deoarece aceasta valoare poate sa fie setata diferit pentru local sau pentru cloud, mi se pare foarte utila.
Singurul lucru care ne-a ramas este sa accesam setarea noastra din cod. Acesta este cel mai usor pas, tot ce este nevoie este sa apelam metoda GetConfigurationSettingValue din cadru RoleEnvironment.
string  myCustomFlagValue = RoleEnvironment.GetConfigurationSettingValue("MyCustomFlag");
Ce parere aveti? Ati folosi aceasta varianta?
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Comments

  1. TudorMay 17, 2012 at 2:22 PM

    Nu doar ca as folosi-o, ci e cam singura solutie recomandata pe Azure, unde avem in mod normal mai multe role instances ruland in acelasi timp - web.config fiind separate pentru fiecare instanta, setarile e logic sa fie intr-o locatie centralizata (cscfg), nu in web.config.

    ReplyDelete

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