add protobuf definitions and compiled Java classes

Makefile

@@ -0,0 +1,3 @@
+# compile java protobuf
+protoc-gen-all:
+	docker run -v ${PWD}:/defs namely/protoc-all -d src/main/proto -l java -o ./src/main/java

pom.xml

@@ -10,6 +10,14 @@
     <version>3.0.0-alpha.1</version>
 
     <build>
+        <extensions>
+            <extension>
+                <groupId>kr.motd.maven</groupId>
+                <artifactId>os-maven-plugin</artifactId>
+                <version>1.7.1</version>
+            </extension>
+        </extensions>
+
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -92,6 +100,24 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.xolstice.maven.plugins</groupId>
+                <artifactId>protobuf-maven-plugin</artifactId>
+                <version>0.6.1</version>
+                <configuration>
+                    <protocArtifact>com.google.protobuf:protoc:3.25.3:exe:${os.detected.classifier}</protocArtifact>
+                    <pluginId>grpc-java</pluginId>
+                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.67.1:exe:${os.detected.classifier}</pluginArtifact>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>compile</goal>
+                            <goal>compile-custom</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 
@@ -133,9 +159,33 @@
             <artifactId>fastutil</artifactId>
             <version>8.5.13</version>
         </dependency>
+
+        <!-- grpc deps -->
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-netty-shaded</artifactId>
+            <version>1.67.1</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-protobuf</artifactId>
+            <version>1.67.1</version>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-stub</artifactId>
+            <version>1.67.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.tomcat</groupId>
+            <artifactId>annotations-api</artifactId>
+            <version>6.0.53</version>
+            <scope>provided</scope>
+        </dependency>
     </dependencies>
 
     <properties>
         <antlr.version>4.13.1</antlr.version>
     </properties>
-</project>
+</project>