using blobstore with google cloud endpoint and android

Question

I am developing an app-engine connected android project using the eclipse plugin. One aspect of the app is to allow user Alpha to send pictures to user Bravo. To do that I have the following setup:

User Alpha posting:

• send image to my app engine server through endpoints
• server stores image in blob store
• server stores blobkey in datastore

User Bravo getting:

• server gets blobkey from datastore
• server gets image using blob key
• server sends image to android app using endpoints

This setup takes upward of two (2) minutes from when my android app sends an image to when I can see it in the blob sore. Needless to say this is completely unacceptable.

My server is processing the image programmatically, thru the following code:

public static BlobKey toBlobstore(Blob imageData) throws FileNotFoundException, FinalizationException, LockException, IOException {
        if (null == imageData)
            return null;

        // Get a file service
        FileService fileService = FileServiceFactory.getFileService();

        // Create a new Blob file with mime-type "image/png"
        AppEngineFile file = fileService.createNewBlobFile("image/jpeg");// png

        // Open a channel to write to it
        boolean lock = true;
        FileWriteChannel writeChannel = fileService.openWriteChannel(file, lock);

        // This time we write to the channel directly
        writeChannel.write(ByteBuffer.wrap
            (imageData.getBytes()));

        // Now finalize
        writeChannel.closeFinally();
        return fileService.getBlobKey(file);
    }

Does anyone know how I can either adapt the official example to use endpoints (in the case where I must use my app-engine instances) or use getServingUrl (bypassing my instances) to store and serve my blobs?
Please, instead of words, include the code. Thanks.

Answer 1

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