distributed-transactions-practice

Java start

1. cd ./docker && ./recreate.sh && cd ../
2. cd ./java
3. gradlew :payments:payments-grpc-service:bootRun &
4. gradlew :reserve:reserve-grpc-service:bootRun &
5. gradlew :orders:orders-grpc-service:bootRun &
6. open in browser http://localhost:7080/swagger-ui/index.html
7. use examples from the request directory to create an order

Run Go

1. Just reuse DB populated by gralde build
2. cd ./golang
3. task
4. task run
5. open in browser http://localhost:8001/swagger-ui/index.html

Comparsion

	Java (block io)	Java (reactive)	Go
version	24	24	1.25
Build tool	Gradle 8.14	Gradle 8.14	Task
Code formatter	com.diffplug.spotless gradle plugin	com.diffplug.spotless gradle plugin	built-in
Boilerplate recuder (code gen)	org.projectlombok:lombok	org.projectlombok:lombok	fieldr
Logger	slf4j	slf4j	zerolog
Application framework	Spring Boot	Spring Boot	not used
Dep. injection	Spring Context	Spring Context	not used
Postgres driver	JDBC	R2DBC	pgx/v5
RDBC access layer generator	Jooq	Jooq	Sqlc
DB migration lib	Liquibase	Liquibase	Goose
Tests engine	junit5	junit5	built-in
Integration tests	jvm-test-suite gradle plugin	jvm-test-suite gradle plugin	-
Mock lib	Mockito	Mockito	Mockio
REST engine	Spring MVC	Spring Webflux	built-in http.Server
GRPC engine lib	okhttp	io.grpc:grpc-netty-shaded	google.golang.org/grpc
GRPC code generator	com.google.protobuf gradle plugin	com.google.protobuf gradle plugin	easyp
GRPC-REST transcoding	io.github.danielliu1123:grpc-server-boot-starter	io.github.danielliu1123:grpc-server-boot-starter	grpc-gateway protoc plugin
GRPC-REST Open API generator	io.github.danielliu1123:grpc-starter-transcoding-springdoc	io.github.danielliu1123:grpc-starter-transcoding-springdoc	openapiv2 protoc plugin
Docker container builder	Gradle plugin com.bmuschko.docker-java-application	Gradle plugin com.bmuschko.docker-java-application	native
Kafka lib	Spring Kafka	Spring Kafka, reactor-kafka	franz-go
Tracing (Otel)	micrometer	micrometer	?
Otel exporter	spring-boot-micrometer-tracing-opentelemetry	spring-boot-micrometer-tracing-opentelemetry	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrp
DB connection tracing	net.ttddyy.observation:datasource-micrometer	io.r2dbc:r2dbc-proxy	github.com/exaring/otelpgx
GRPC connection tracing	micrometer-core	micrometer-core	?
Prometheus http api provider	actuator	actuator	github.com/prometheus/client_golang/prometheus/promhttp
Prometheus DB connection collector	actuator	actuator	github.com/cmackenzie1/pgxpool-prometheus
Config properties	Spring Boot (property files, env vars)	Spring Boot (property files, env vars)	env vars