I'm using the JOTA : Library 0.9.11-SNAPSHOT API.
I have the example found at https://github.com/iotaledger/iota.lib.java/blob/master/jota/src/test/java/jota/SendMessageTest.java
working from an Eclipse JUnit run. I know PoW is a fundamental requirement for the Tangle, but how is this done when running an example like this? How to verify that PoW is being done?
I have been using server http://node03.iotatoken.nl:15265
for testing - I've sent 4000+ tryte zero balance message transactions, and have verified the transactions days later. All is working. PoW must have been done - right?
Besides wanting to fully understand how JOTA and the Tangle actually works, I've now run into a situation where that node03 server no longer is working for me. So, I switched over to server http://radiantqs.de:14265.
First I verified a transaction I sent from node03 (using address FOJHXRVJRFMJTFDUWJYYZXCZIJXKQALLXMLKHZFDMHWTIBBXUKSNSUYJLKYRQBNXKRSUXZHDTPWXYD9YF) a couple days ago was still in the Tangle, and radiantqs came back very quick with the transaction. But now, when trying to use radiantqs to sendTransfer (using address LBKRT9VNDECLHZJHPUAUKIPBWFYYHLOOCRXYURDJEYCQTGTGBHPFA9XMNTNWKCMHLSJUMCOFNOGNDBXGZJHMEFYUTX) I don't get a response back - still waiting after 45 minutes.
BTW - It's not just the node03 and radiantqs servers that aren't working for me - I've tried 20 servers found at https://iotanode.host/
and can't get any to work.
I feel like I'm missing some important knowledge about servers and using the Tangle. Like, don't send 4000+ tryte zero balance messages. Or, pay some MIOTA to a server so that they'll keep doing your transactions.
I appreciate any help on this you can provide.