Retry to initialize the token store correctly on exception for PSEP.

[gklijs]

This is a fix for #2274

If the token store wasn't initialized the first time, this will keep trying to initialize the token store.

Current state will try every 100 ms from the coordinator to initialize the tokens, until 30 tries, so about 3 seconds. if still failing it throws an exception.

[CLAassistant]

All committers have signed the CLA.

[CodeDrivenMitch]

I feel this is not the right way to fix this problem. Looking at the TrackingEventProcessor, the initialisation of the token store happens in a Thread started on a lifecycle handler. However, for the PooledStreamingEventProcessor, it's done on the same Thread as the Spring boot intialisation, blocking further configuration from initializing.

I would suggest:

• Moving the initialization to a thread
• Add an incremental backoff
• Use a while loop to prevent stack overflow

[smcvb]

Bunch of things to discuss.

[smcvb]

Getting there! Couple of arguments again, though.

[smcvb]

Being nitpicky here, mostly. But I assume we can resolve these, so I am preemptively approving.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

89.4% Coverage
0.0% Duplication