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Cum putem sincroniza un director cu un blob din cloud.

Ieri am vorbit despre modalitatea prin care una sau mai multe instante de SQL Azure se pot sincroniza.
Astazi o sa incerc sa o ofer o solutie pentru cazul in care un client adauga in mod deconectat date pe blob, pe care noi vrem mai tarziu sa le le sincronizam cu blob-urile din cloud.
Problema: Se da un client care lucreaza cu date din blob-uri in mod deconectat. Se doreste ca la reconectare sa se sincronizeze cele doua storage-uri.
Ati spune simplu, ne apucam sa ne scriem un mecanism prin care sa putem sincroniza cele doua containere de date. Da, e si asta o varianta, dar oare merita sa implementam de la zero acest mecanism. Ati putea spune ca putem vedeam cele doua storage-uri ca si doua directoare si atunci sa folosim un mecanism de sincronizare a directoarelor. Suna bine, dar am o solutie mult mai curata - Microsoft Sync Framework.
Se bazeaza pe idea de a vedea cele doua storage-uri ca si doua directoare( partitii). Folosindu-ne de Microsoft Sync Framework putem sa sincronizam aceste date fara nici o problema.
  FileSyncProvider localfileSyncProvider = new FileSyncProvider(localPathName);
AzureBlobSyncProvider cloudSyncProvider= new AzureBlobSyncProvider(containerName, blobStore);
SyncOrchestrator syncOrchestrator = new SyncOrchestrator();
syncOrchestrator.LocalProvider = localfileSyncProvider;
syncOrchestrator.RemoteProvider = cloudSyncProvider;
syncOrchestrator.Synchronize();
Mai sus am dat un exemplu rudimentar la modul in care se poate face o sincronizare intre un directoru local si un blob folosindu-ne de acest framework. Ce mi-a placut pana acuma este ca nu mai este nevoie sa imi bat capul cum sa detectez modific─ârile. Exista deja implementat un mecanism pentru acest lucru, iar in cazul in care dorim unul custom, putem cu usurinta sa inseram mecanismul nostru propriu.
Zilele astea o sa studiez acest framework si o sa revin cu alte posturi. O prezentare interesanta gasiti aici: http://www.microsoftpdc.com/2009/SVC23

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