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Java example to find recent updates (without having to poll) using webhook notification
Do you have an example in Java that selects recent adds/deletes to a dropbox folder do doesn't require polling? The examples that I pulled from Github do contain one that uses a loop that continu...
Greg-DB
Dropbox Community Moderator
Dropbox Community ModeratorI don't believe we have any examples quite like that for the API v2 Java SDK, but I'll be happy to help with any issues you're running in to.
The basic idea is that you can call listFolder and listFolderContinue initially until hasMore is false to get the initial state. Then, you can listFolderContinue for the relevant user when you get a webhook notification for them. At each call, you should re-use the latest cursor you had for that user, and then store the new one. That lets you retrieve only the new entries.
There's more information on processing these in the documentation here:
When using webhooks, you would trigger the subseqeuent listFolderContinue calls from your webhook URI handler, (as opposed to a long poll loop). There are some best practices covered here:
https://www.dropbox.com/developers/reference/webhooks
If you're having any trouble with any particular methods, please share the details (the code you're using, any errors you're getting, etc.) and I'll take a look.
Hi Greg --
TheAPI documentation you mentioned at https://dropbox.github.io/dropbox-sdk-java/api-docs/v2.1.x/com/dropbox/core/v2/files/DbxUserFilesRequests.html#listFolder-java.lang.String-
suggests using ListFolderArg.getRecursive() to keep a local cache of the Dropbox metadata state (e.g. the latest cursor for a user) to be able to find the latest file changes when a user send a Webhook notification. It appears that ListFolderArg was available in version 2.0, but is no longer documented or used in v2.1 .
Using version 2.1, what do you then recommend that I use to store the state locally, to be able to find recent file updates for a user with a Webhook notification?
Thanks,
Sam
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