Which RPC may I use to query bitcoind for raw transactions coming through? I need to capture and store the raw transactions coming through my local full-node bitcoin instance. I read here that it is possible, but there is no mention of the particular RPC calls. I also see the raw transaction JSON-RPC API, but it is still not clear how to use this to periodically query the raw transactions.

It seems like bitcoin-sniffer (written in python) is what I am trying to do and need, and since I am using Java, it seems bitcoinj can actually listen for incoming transactions, but I don't see example codes on how to do this.

My question is, how do I use the HTTP POST JSON RPC API back to my local bitcoin instance to query for transactions? Is there a tutorial? 

I'd imagine I would be running in a continuous thread and periodically query bitcoind (the daemon) for the latest batch of transactions. Is this possible?
My question is, how do I use the HTTP POST JSON RPC API back to my local bitcoin >instance to query for transactions? Is there a tutorial? 


You can find information about bitcoin RPC in https://bitcoin.org/en/developer-reference#remote-procedure-calls-rpcs

Also you can actually execute bitcoin RPC calls in https://chainquery.com/bitcoin-cli. If you only want to see what they are returning


  I'd imagine I would be running in a continuous thread and periodically query >bitcoind (the daemon) for the latest batch of transactions. Is this possible?


That's the approach I'm using in my project, you can see the code in https://github.com/JRamosGarcia/bitcoindAdapter It uses many java technologies as spring (for many uses, but make RPC a breeze to implement) ,  or quartz for periodic jobs. It's a work in progress, but maybe you can find some code or technology that helps you.