I'm working on a project which uses Facebook Graph Api to collect information about the public posts. There is a need to update this data Real-Time when changes come to this posts. i have seen a real time update mechanism using call back url https://developers.facebook.com/docs/graph-api/reference/app/subscriptions/ and https://developers.facebook.com/docs/graph-api/real-time-updates/ .. But i didnt get any idea of doing this in java. Please somebody help me using an example.
facebook real time update in java example
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Real time updates are available for page and user objects.Both of them requires the access token of the respective page or user.(For page you can check it using me/accounts or get it via giving page access permissions to your app).
Step 1: You will need a public ip where facebook will post the updates. Step 2: You need to setup your fb app to initiate real-time updates setup
Step 3:This will trigger facebook callback url validation.It can be a servlet or any other which will process the updates posted to callback url.Facebook will provide a challenge code in a get request which you need to resend.
}
Step 3: Add your application as a page tab to subscribe from real time updates from that page.you will need a page Access token
Step 4 : Facebook will post updates via post request to your call back url.