MdbBlobStore

MdbBlobStore

Blob store implementation for storing content inside models public folders. Key conceptions:

  • relative path created in format modelName|relativePathFromModelDir to hide real file place from client
  • OS user temp folder used for store temporary content

  • delete operation is forbidden since models must be under version control

    Used in:

  • ubm_form for store form def & js inside /public/forms

  • ubm_diagrams for store diagram inside /public/erdiagrams
  • ubs_report for store report template inside /public/reports
  • e.t.c.

Constructor

new MdbBlobStore()

Methods

doDeletion()

fillResponse(requestParams, blobItem, req, resp) → Boolean

Fill HTTP response for getDocument request
Arguments:
  1. requestParams (BlobStoreRequest)
  2. blobItem (BlobStoreItem)
  3. req (THTTPRequest)
  4. resp (THTTPResponse)

getContent(request, blobInfo, optionsopt) → String|ArrayBuffer abstract

Retrieve BLOB content from blob store.
Arguments:
  1. request (BlobStoreRequest)
  2. blobInfo (BlobStoreItem)  JSON retrieved from a DB.
  3. [options] (Object)
    Properties
    1. [encoding] (String|Null)  Default to 'bin'. Possible values: 'bin'|'ascii'|'utf-8' If undefined UB will send query to entity anf get it from DB. At last one parameter {store: storeName} should be defined to prevent loading actual JSON from DB

persist(attribute, ID, dirtyItem, newRevision) → BlobStoreItem

Move content defined by dirtyItem from temporary to permanent store. In case oldItem is present store implementation & parameters should be taken from oldItem.store. Return a new attribute content which describe a place of BLOB in permanent store
Arguments:
  1. attribute (UBEntityAttribute)
  2. ID (Number)
  3. dirtyItem (BlobStoreItem)
  4. newRevision (number)

saveContentToTempStore(request, attribute, content) → BlobStoreItem

Arguments:
  1. request (BlobStoreRequest)  Request params
  2. attribute (UBEntityAttribute)
  3. content (ArrayBuffer)