CODEWITHSUNDEEP
javaimagegoogle-app-engine
LJSilver
LJSilver

Reputation: 603

Google apps engine - some questions about ImageService url serving

GAE Images Service promises very high performance and a huge code semplification, however I'd like to know some additional details about before using it:

  1. is the url obtained by getServingUrl persistent? i.e. a static reference to the blobkey representing the image in the blobstore? if it is, then it is better to create it once when a new image is uploaded so as to eventually store also the reverse association blobkey->url right?
  2. When I need to delete an image:
    If I remove the blob from the blobkey then the image will be anyway visible from the urlfor max. 24h right?
    If I remove only the url reference using the deleteServingURL method how does the imagesservice behave? same way as before?
    And what if I delete both?
  3. Does this service have any additional cost?
  4. Is it really efficient and responsive as it says to be?

Upvotes: 0

Views: 59

Answers (1)

Stuart Langley
Stuart Langley

Reputation: 7054

is the url obtained by getServingUrl persistent?

yes

it is better to create it once

yes - it takes time to create the URL so you're best option is to create it and then store the result.

When I need to delete an image

Call deleteServinceURL first and then delete the blobKey as well is the best way.

Does this service have any additional cost?

You pay for the bandwidth for accessing the URL and a very small amount of blob storage is it generates some thumbnails to increase the serving speed.

Is it really efficient and responsive as it says to be?

Yes

Upvotes: 1

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