An airhacks.fm conversation with Alejandro Pablo Revilla (@apr) about:

checkout episode with Alejandro: "#201 Write, Finish, Improve-jPOS",

JPOS vision,

handling large loads and making changes on the fly,

connections to thousands ofr networking,

circuit breaking 20 years ago,

jPOS EE - the extendible edition,

The Payment Platformn,

"#72 KISS and No Dependencies in JGroups" with Bela Ban,

jdom - the XML parser,

dependencies require care,

Java becomes better and better,

being lazy and avoiding dependencies,

rejecting unnecessary dependencies,

Java 1:1 mapping between a file and a class is great,

class injection without interfaces,

quarkus / Micronaut as lambda and dependency injection for free,

interfaces as defect,

logging and realms,

logging a context of a transation,

self-configurable logger with CDI,

what happens inside a Point of Sale (POS),

the latency requirements,

Transaction Manager uses continuations,

jPOS Transaction Manager on Project Loom evaluation,

jPOS is 100k LoC,

jPOS Transaction Manager is 1k LoC,

jPOS implements two-phase commit protocol,

jPOS uses BerkeleyDB for checkpoint storage,

the opinionated 2PC,

continuations and reactive programming,

Project Loom and structured concurrency,

virtual threads and database connection pooling,

the Hardware Security Module (HSM) and Transaction Manager,

cloud are more secure,

hybrid clouds,

buying support for opensource software