Web3j: How could I send transactions continuously with Web3j generated wrapper

[KimiWu123]

I wrote a smart contract and deployed on my private Quorum. I use Web3j to generate java wrapper to call ABIs. For example,

// here is a smart contract function
function getMoney() external payable 
{
    Event_GotMoney(msg.value, now);
}

In my java, if I call like this

contract.getMoney(new BigInteger(100)).send();
// or
// contract.getMoney(new BigInteger(100));

I can always get Event_GotMoney event. However, if I want to call it continuously, like this, (asynchronized)

for(int i=0; i<100; i++)
    contract.getMoney(new BigInteger(100));

I can't get 100 Event_GotMoney events. The interval of the timestamp in the event is 3 or 10 seconds(depends on the frequency of generating blocks). I guess the nonce isn't updated util a block generated. If my guess is correct, how can I call smart contract functions continuously? If not, is it a limitation or something?

Another small question, I use event observable functions provided by Web3j wrapper. It works well to get events, but it updates every 15 seconds. How could I modify the interval?

Any feedback would be appreciate.

[ChenYunerer]

do you know how to fix this problem， i meet the same problem

[KimiWu123]

No, I didn't find any solutions or workarounds. I found it uses "pending" to get nonce. It shouldn't have this kind of issues. If you have any ideas, please share with me.

[dukei]

You can use FastRawTransactionManager and sendAsync() instead of send(). It will allow you to send many transactions asynchronously.

[KimiWu123]

@dukei , I tried sendAsync() in my loop and I got the same result.

[KimiWu123]

I found this could change the 15 seconds interval.

[KimiWu123]

I found the solution, dukei is right.
Here is my code, @ChenYunerer for your reference,

FastRawTransactionManager fastRawTxMgr =new FastRawTransactionManager(web3, credentials, new PollingTransactionReceiptProcessor(web3j, pollingInterval, 40));
Contract contract = MyPersonalContract.load(contractAddr, web3, fastRawTxMgr, gasPrice, gasLimit);