ADF with WebSockets Tips.

In these days everybody talk about the WebSokects  integration with ADF.
In this post I will give some advices about this integration.

  • You can use WebSockets in combination with Database Change Notification(DCN)
    • In this case remember you need a grant grant change notification to hr
  • In DCN You need to explicitly unregister a registration to delete it from the server and release the resources in the driver. You can unregister a registration using a connection different from one that was used for creating it
  • With DCN you could have problem with some column types.
    • ORA-29977: Unsupported column type for query registration in guaranteed mode
    • Check if in your query you have a blob,clob or xmlType column
  • Websockets have a default timeout in 30s
  • WebSocketAdapter now is deprecated, here you have oficial doc to build WebSockets in weblogic.

With WebSockets you can build something like that

websockets

 

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