Encountering server timeout on App Engine while attempting to retrieve thumbnails, even with Pagin..

[taulant]

Encountering server timeout on App Engine while attempting to retrieve thumbnails, even with Pagination

Is there a simpler way to get the thumbnails? 

I would highly appreciate some help!

public ImageResult getFolderImageContents(String folderPath) {

List<ImageInfo> images = new ArrayList<>();

String cursor = null;

try {

DbxClientV2 dbxClient = dropboxClientProvider.getDropboxClient();

ListFolderResult results = dbxClient.files().listFolder(folderPath);

for (Metadata metadata : results.getEntries()) {

if (metadata instanceof FileMetadata) {

FileMetadata fileMetadata = (FileMetadata) metadata;

String fileName = fileMetadata.getName();

String extension = fileName.substring(fileName.lastIndexOf('.') + 1).toLowerCase();

if (isImageFile(extension)) {

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

dbxClient.files().getThumbnailBuilder(fileMetadata.getPathLower())

.withFormat(ThumbnailFormat.PNG)

.withSize(ThumbnailSize.W64H64)

.download(outputStream);

byte[] thumbnailData = outputStream.toByteArray();

images.add(new ImageInfo(fileMetadata.getName(), thumbnailData, fileMetadata.getPathDisplay()));

}

}

}

if (results.getHasMore()) {

cursor = results.getCursor();

}

} catch (Exception e) {

e.printStackTrace();

}

return new ImageResult(images, cursor);

}

[Greg-DB · Accepted solution]

Just to clarify, do you mean you're getting a timeout from the Dropbox API, or that some operation on your server is timing out while performing these Dropbox API calls?

Regardless, the Dropbox API does offer a way to get thumbnails in batches. In the Dropbox Java SDK, that's available via the getThumbnailBatch method.

[taulant]

Thank you for your guidance, Graig! It turns out the timeout issue was indeed on my server's end, not with Dropbox. I wasn't familiar with the getThumbnailBatch method you mentioned, but after implementing it, everything is working smoothly. Your quick response was incredibly helpful and pointed me in the right direction. Much appreciated!