fix: rename region_id to region_number (#44)

* feat: build java codes by makefile

* feat: generate java code

* fix: rename region_id to region_number

* feat: generate code

Makefile

@@ -1,8 +1,8 @@
-.PHONY: all rust go go-deps
+.PHONY: all rust go go-deps java
 
 BUILDER_CONTAINER=namely/protoc-all:1.51_1
 
-all: rust go
+all: rust go java
 
 rust:
 	cargo build
@@ -14,3 +14,8 @@ go: go-deps
 
 go-deps:
 	go mod download
+
+java:
+	docker run -t -w /greptime-proto \
+		--entrypoint ./scripts/generate-java.sh \
+		-v ${PWD}:/greptime-proto ${BUILDER_CONTAINER}