Hey Luigi > in order to have a replicable behavior upon log replay, I need to add the > timestamp into the log entry. Could you please explain your use case a little more? What is the use of timestamp? Are you ordering the transactions based on this timestamp?
Regards Lokesh > On 03-Aug-2021, at 7:14 PM, Mercurio, Luigi (Coral Springs) > <[email protected]> wrote: > > Hi all: > > I am considering moving from Atomix to Ratis for one of our core components. > This is a state machine which handles time-sensitive data. > > Alas, Ratis does not seem to have a virtual clock, so, in order to have a > replicable behavior upon log replay, I need to add the timestamp into the log > entry. > > The problem is that I must create the timestamp inside > preAppendTransaction(). I cannot do that in startTransaction(), because this > leads to events being passed to applyTransaction() in random order, and not > in the order in which the timestamp where inserted into the logData. > > But…. There is not way to update the TransactionContext’s logData into an > existing TransactionContext. Yes, I can create a new one and return it from > preAppendTransaction(), but this will just cause the entire call to fail, > because the server does not properly handle the newly returned > TransactionContext. > > So, for now I have to resort to set the (private) caseData_ field by > reflection, and I’d rather avoid doing so. Any chance that you can allow > updating the logData in the StateMachineLogEntryProto? That would solve the > problem. > > Or… even better…. Can you automatically associate a timestamp with the log > entries? That would be GREAT! > > Luigi Mercurio > Sr. Application Analyst > FDR-New Arch Acceleration > Office: +1 954.851.0000 > > Fiserv > 3975 NW 120th Avenue > Coral Springs, Florida 33065 > United States > > Register Today | Forum 2020 | June > 15–18<https://www.fiserv.com/en/lp/emailsignature.html> > Fiserv<https://www.fiserv.com/index.aspx> | Join Our > Team<https://www.careers.fiserv.com/?utm_source=outlook&utm_medium=email&utm_campaign=signature> > | Twitter<https://twitter.com/fiserv> | > LinkedIn<https://www.linkedin.com/company/fiserv/> | > Facebook<https://www.facebook.com/Fiserv/> > FORTUNE Magazine World's Most Admired Companies® 2014 | 2015 | 2016 | 2017 | > 2018 | 2019 | 2020 > © 2020 Fiserv Inc. or its affiliates. Fiserv is a registered trademark of > Fiserv Inc. Privacy > Policy<https://www.fiserv.com/en/about-fiserv/privacy-policy.html> > © 2020 Fortune Media IP Limited. Used under license. >
