[ Kotlin ] Integrate ProtoBuffer and GoogleRPC Into KotlinNative

文章目录

          • [Declare Plugin and Repository](#Declare Plugin and Repository)
          • [Apply Plugin and Dependency](#Apply Plugin and Dependency)
          • [Configure Code Generation Dir and Tools](#Configure Code Generation Dir and Tools)
          • [Compile Proto File](#Compile Proto File)
          • [Auto Generate Class Files](#Auto Generate Class Files)
          • [Write and Read Data Directly Through PB File](#Write and Read Data Directly Through PB File)
          • [Create a Google RPC Server Transmitting with ProtoBuffer](#Create a Google RPC Server Transmitting with ProtoBuffer)
          • [Create a Google RPC Client](#Create a Google RPC Client)
Declare Plugin and Repository
kotlin 复制代码
pluginManagement {
    plugins {
        id("org.jetbrains.kotlin.jvm") version "2.0.0" apply false
        id("com.google.protobuf") version "0.9.2" apply false
    }
}

dependencyResolutionManagement {
    repositoriesMode = RepositoriesMode.PREFER_SETTINGS
    repositories {
        mavenLocal()
        google()
        mavenCentral()
        gradlePluginPortal()
    }
}
Apply Plugin and Dependency
kotlin 复制代码
plugins {
    id("org.jetbrains.kotlin.jvm")
    id("com.google.protobuf")
}


java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(8)
    }
}

dependencies {
    api("io.github.hellogoogle2000:kotlin-commons:+")
    api("com.google.protobuf:protobuf-kotlin:3.22.2")
    api("io.grpc:grpc-protobuf:1.54.0")
    api("io.grpc:grpc-netty-shaded:1.54.0")
    api("io.grpc:grpc-kotlin-stub:1.3.0")
    api("org.apache.tomcat:annotations-api:6.0.53")
}
Configure Code Generation Dir and Tools
kotlin 复制代码
protobuf {
    protoc {
        artifact = "com.google.protobuf:protoc:3.22.2"
    }
    plugins {
        create("rpc-java") {
            artifact = "io.grpc:protoc-gen-grpc-java:1.54.0"
        }
        create("rpc-kotlin") {
            artifact = "io.grpc:protoc-gen-grpc-kotlin:1.3.0:jdk8@jar"
        }
    }
    generateProtoTasks {
        all().forEach {
            it.plugins {
                create("rpc-java")
            }
            it.plugins {
                create("rpc-kotlin")
            }
            it.builtins {
                create("kotlin")
            }
        }
    }
}
Compile Proto File
groovy 复制代码
syntax = "proto3";

package com.kotlin.sample;

option java_multiple_files = true;
option java_package = "com.kotlin.sample.proto";
option java_outer_classname = "UserProto";

message UserListWrapper {
  repeated User list = 1;
}

message User {
  int32 id = 1;
  string name = 2;
  repeated Course courses = 3;
}

message Course {
  int32 id = 1;
  string name = 2;
}

message GetUserRequest {
  int32 pageSize = 1;
  int32 pageIndex = 2;
}

message GetUserResponse {
  repeated User users = 1;
}

service UserService {
  rpc GetUserList (GetUserRequest) returns (GetUserResponse) {}
}
Auto Generate Class Files

rebuild project, plugin will auto-generate all required files

Write and Read Data Directly Through PB File
kotlin 复制代码
import com.kotlin.sample.proto.User
import com.kotlin.sample.proto.UserListWrapper
import com.kotlin.sample.proto.user
import com.kotlin.sample.proto.userListWrapper
import x.kotlin.commons.string.UUID
import kotlin.io.path.Path
import kotlin.io.path.inputStream
import kotlin.io.path.outputStream

fun main() {
    // create user objects
    val users = mutableListOf<User>()
    repeat(2) {
        val user = user {
            id = UUID.hashCode()
            name = UUID.short()
        }
        users.add(user)
    }
    // create pb file
    val path = Path("/home/easing/temp/users.pb")
    // write to pb file
    val userListWrapper1 = userListWrapper { list.addAll(users) }
    path.outputStream().use { userListWrapper1.writeTo(it) }
    // read from pb file
    val userListWrapper2 = path.inputStream().use { UserListWrapper.parser().parseFrom(it) }
    println(userListWrapper1 == userListWrapper2)
}
Create a Google RPC Server Transmitting with ProtoBuffer
kotlin 复制代码
import com.kotlin.sample.proto.*
import io.grpc.ServerBuilder
import x.kotlin.commons.string.UUID

private class UserService : UserServiceGrpcKt.UserServiceCoroutineImplBase() {
    override suspend fun getUserList(request: GetUserRequest): GetUserResponse {
        val users = mutableListOf<User>()
        repeat(2) {
            val user = user {
                id = UUID.hashCode()
                name = UUID.short()
            }
            users.add(user)
        }
        return getUserResponse { this.users.addAll(users) }
    }
}

fun main() {
    val server = ServerBuilder
        .forPort(10001)
        .addService(UserService())
        .build()
    server.start()
    server.awaitTermination()
}
Create a Google RPC Client
kotlin 复制代码
import com.kotlin.sample.proto.UserServiceGrpcKt
import com.kotlin.sample.proto.getUserRequest
import io.grpc.ManagedChannelBuilder

suspend fun main() {
    val channel = ManagedChannelBuilder
        .forTarget("localhost:10001")
        .usePlaintext()
        .build()
    val service = UserServiceGrpcKt.UserServiceCoroutineStub(channel)
    val request = getUserRequest {
        pageSize = 10
        pageIndex = 0
    }
    val getUserResponse = service.getUserList(request)
    println(getUserResponse.usersList)
}
相关推荐
娅娅梨2 小时前
Android- Surface, SurfaceView, TextureView, SurfaceTexture 原理图解
android·surface
2501_915918413 小时前
HTTPS 端口号详解 443 端口作用、iOS 抓包方法、常见 HTTPS 抓包工具与网络调试实践
android·网络·ios·小程序·https·uni-app·iphone
程序员码歌3 小时前
明年35岁了,如何破局?说说心里话
android·前端·后端
非门由也5 小时前
Android studio安装教程——超详细(含安装包安装教程)
android·ide·android studio
平淡风云5 小时前
Android应用添加日历提醒功能
android·日历
骐骥16 小时前
2025-09-08升级问题记录:app提示“此应用专为旧版Android打造..”或“此应用与最新版 Android 不兼容”
android·升级·不兼容·target sdk·专为旧版 android 系统
Zender Han7 小时前
Flutter 视频播放器——flick_video_player 介绍与使用
android·flutter·ios·音视频
尚久龙8 小时前
安卓学习 之 用户登录界面的简单实现
android·运维·服务器·学习·手机·android studio·安卓
Modu_MrLiu8 小时前
Android实战进阶 - 启动页
android·实战进阶·启动页·倒计时场景
出门吃三碗饭9 小时前
编译器构造:从零手写汇编与反汇编程序(一)
android·汇编