├── .gitignore ├── README.md ├── api ├── build.gradle └── src │ └── main │ └── proto │ └── helloworld.proto ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle └── src └── main └── kotlin ├── GreeterService.kt └── main.kt /.gitignore: -------------------------------------------------------------------------------- 1 | .idea 2 | .gradle 3 | build 4 | out/ 5 | *.iml 6 | .DS_STORE 7 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | 2 | [![Kroto+](https://raw.githubusercontent.com/marcoferrer/kroto-plus/master/kp-logo.svg?sanitize=true)](https://github.com/marcoferrer/kroto-plus) 3 | ## Kotlin Coroutines gRPC Template 4 | 5 | This is a template project for getting started building __[gRPC](https://github.com/grpc/grpc-java)__ clients and services using __[Kotlin Coroutines](https://github.com/Kotlin/kotlinx.coroutines)__ and __[kroto-plus](https://github.com/marcoferrer/kroto-plus)__ code generation. 6 | 7 | * Template Variations 8 | * [Using protoc-gen-grpc-coroutines](https://github.com/marcoferrer/kotlin-coroutines-gRPC-template) (Basic) 9 | * [Using protoc-gen-kroto-plus](https://github.com/marcoferrer/kotlin-coroutines-gRPC-template/tree/kroto-plus-template ) (Advanced Features) 10 | * [Using protobuf-lite](https://github.com/marcoferrer/kotlin-coroutines-gRPC-template/tree/protobuf-lite) 11 | 12 | The template can be built and ran using the following command: 13 | ```bash 14 | git clone https://github.com/marcoferrer/kotlin-coroutines-gRPC-template && \ 15 | cd kotlin-coroutines-gRPC-template && \ 16 | ./gradlew run 17 | ``` 18 | 19 | This template covers: 20 | * Recommeded Build Configuration 21 | * Implementing A Service 22 | * Instantiating A Client Stub 23 | * Attaching a ```coroutineContext``` 24 | * Client and Server Rpc Method Examples: 25 | * Unary 26 | * Client Streaming 27 | * Server Streaming 28 | * BiDirectional Streaming 29 | -------------------------------------------------------------------------------- /api/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'kotlin' 2 | apply plugin: 'com.google.protobuf' 3 | apply plugin: 'idea' 4 | 5 | dependencies { 6 | 7 | // For jdk 9+ you need to include javax.annotations 8 | // The reason is outlined in this grpc issue 9 | // https://github.com/grpc/grpc-java/issues/4725 10 | compileOnly "javax.annotation:javax.annotation-api:1.2" 11 | 12 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8" 13 | implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version" 14 | implementation "com.github.marcoferrer.krotoplus:kroto-plus-coroutines:$krotoplus_version" 15 | 16 | implementation "com.google.protobuf:protobuf-java:$protobuf_version" 17 | implementation "io.grpc:grpc-protobuf:$grpc_version" 18 | implementation "io.grpc:grpc-stub:$grpc_version" 19 | } 20 | 21 | protobuf { 22 | protoc { 23 | artifact = "com.google.protobuf:protoc:$protobuf_version" 24 | } 25 | 26 | //noinspection GroovyAssignabilityCheck 27 | plugins { 28 | grpc { artifact = "io.grpc:protoc-gen-grpc-java:$grpc_version" } 29 | coroutines { 30 | artifact = "com.github.marcoferrer.krotoplus:protoc-gen-grpc-coroutines:$krotoplus_version:jvm8@jar" 31 | } 32 | } 33 | 34 | generateProtoTasks { 35 | 36 | all().each{ task -> 37 | 38 | task.plugins { 39 | grpc {} 40 | coroutines {} 41 | } 42 | } 43 | } 44 | } -------------------------------------------------------------------------------- /api/src/main/proto/helloworld.proto: -------------------------------------------------------------------------------- 1 | syntax = "proto3"; 2 | 3 | option java_multiple_files = true; 4 | option java_package = "io.grpc.examples.helloworld"; 5 | option java_outer_classname = "HelloWorldProto"; 6 | option objc_class_prefix = "HLW"; 7 | 8 | package helloworld; 9 | 10 | // The greeting service definition. 11 | service Greeter { 12 | 13 | // Sends a greeting 14 | rpc SayHello (HelloRequest) returns (HelloReply); 15 | 16 | // Streams a many greetings 17 | rpc SayHelloStreaming (stream HelloRequest) returns (stream HelloReply); 18 | 19 | rpc SayHelloClientStreaming (stream HelloRequest) returns (HelloReply); 20 | 21 | rpc SayHelloServerStreaming (HelloRequest) returns (stream HelloReply); 22 | } 23 | 24 | // The request message containing the user's name. 25 | message HelloRequest { 26 | string name = 1; 27 | } 28 | 29 | // The response message containing the greetings 30 | message HelloReply { 31 | string message = 1; 32 | } -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | plugins { 2 | id 'application' 3 | id 'com.google.protobuf' version '0.8.7' 4 | id 'org.jetbrains.kotlin.jvm' version '1.3.21' 5 | } 6 | 7 | application { 8 | mainClassName = "MainKt" 9 | } 10 | 11 | group 'com.github.marcoferrer.krotoplus' 12 | version '1.0-SNAPSHOT' 13 | 14 | allprojects { 15 | repositories { 16 | mavenCentral() 17 | if(krotoplus_version.endsWith('SNAPSHOT')){ 18 | maven { url 'https://oss.jfrog.org/artifactory/oss-snapshot-local' } 19 | } 20 | } 21 | } 22 | 23 | dependencies { 24 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8" 25 | implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version" 26 | 27 | implementation "io.grpc:grpc-protobuf:$grpc_version" 28 | implementation "io.grpc:grpc-stub:$grpc_version" 29 | implementation "io.grpc:grpc-netty:$grpc_version" 30 | 31 | implementation "com.github.marcoferrer.krotoplus:kroto-plus-coroutines:$krotoplus_version" 32 | implementation "com.google.protobuf:protobuf-java:$protobuf_version" 33 | 34 | implementation project(':api') 35 | } 36 | 37 | compileKotlin { 38 | kotlinOptions{ 39 | jvmTarget = "1.8" 40 | freeCompilerArgs += [ 41 | // This flag is required due to the current implementation using 42 | // the coroutine builder [CoroutineScope.actor]. This can be removed 43 | // once the coroutines stdlib is updated with a suitable replacement 44 | "-Xuse-experimental=kotlinx.coroutines.ObsoleteCoroutinesApi" 45 | ] 46 | } 47 | } 48 | 49 | compileTestKotlin { 50 | kotlinOptions.jvmTarget = "1.8" 51 | } -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | kotlin.code.style=official 2 | 3 | krotoplus_version=0.5.0-RC 4 | protobuf_version=3.9.0 5 | coroutines_version=1.3.0 6 | grpc_version=1.23.0 -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/marcoferrer/kotlin-coroutines-gRPC-template/6faa20103e39d33de66189721e598fd7972a6621/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Attempt to set APP_HOME 10 | # Resolve links: $0 may be a link 11 | PRG="$0" 12 | # Need this for relative symlinks. 13 | while [ -h "$PRG" ] ; do 14 | ls=`ls -ld "$PRG"` 15 | link=`expr "$ls" : '.*-> \(.*\)$'` 16 | if expr "$link" : '/.*' > /dev/null; then 17 | PRG="$link" 18 | else 19 | PRG=`dirname "$PRG"`"/$link" 20 | fi 21 | done 22 | SAVED="`pwd`" 23 | cd "`dirname \"$PRG\"`/" >/dev/null 24 | APP_HOME="`pwd -P`" 25 | cd "$SAVED" >/dev/null 26 | 27 | APP_NAME="Gradle" 28 | APP_BASE_NAME=`basename "$0"` 29 | 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 31 | DEFAULT_JVM_OPTS="" 32 | 33 | # Use the maximum available, or set MAX_FD != -1 to use that value. 34 | MAX_FD="maximum" 35 | 36 | warn () { 37 | echo "$*" 38 | } 39 | 40 | die () { 41 | echo 42 | echo "$*" 43 | echo 44 | exit 1 45 | } 46 | 47 | # OS specific support (must be 'true' or 'false'). 48 | cygwin=false 49 | msys=false 50 | darwin=false 51 | nonstop=false 52 | case "`uname`" in 53 | CYGWIN* ) 54 | cygwin=true 55 | ;; 56 | Darwin* ) 57 | darwin=true 58 | ;; 59 | MINGW* ) 60 | msys=true 61 | ;; 62 | NONSTOP* ) 63 | nonstop=true 64 | ;; 65 | esac 66 | 67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 68 | 69 | # Determine the Java command to use to start the JVM. 70 | if [ -n "$JAVA_HOME" ] ; then 71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 72 | # IBM's JDK on AIX uses strange locations for the executables 73 | JAVACMD="$JAVA_HOME/jre/sh/java" 74 | else 75 | JAVACMD="$JAVA_HOME/bin/java" 76 | fi 77 | if [ ! -x "$JAVACMD" ] ; then 78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 79 | 80 | Please set the JAVA_HOME variable in your environment to match the 81 | location of your Java installation." 82 | fi 83 | else 84 | JAVACMD="java" 85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 86 | 87 | Please set the JAVA_HOME variable in your environment to match the 88 | location of your Java installation." 89 | fi 90 | 91 | # Increase the maximum file descriptors if we can. 92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 93 | MAX_FD_LIMIT=`ulimit -H -n` 94 | if [ $? -eq 0 ] ; then 95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 96 | MAX_FD="$MAX_FD_LIMIT" 97 | fi 98 | ulimit -n $MAX_FD 99 | if [ $? -ne 0 ] ; then 100 | warn "Could not set maximum file descriptor limit: $MAX_FD" 101 | fi 102 | else 103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 104 | fi 105 | fi 106 | 107 | # For Darwin, add options to specify how the application appears in the dock 108 | if $darwin; then 109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 110 | fi 111 | 112 | # For Cygwin, switch paths to Windows format before running java 113 | if $cygwin ; then 114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 116 | JAVACMD=`cygpath --unix "$JAVACMD"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Escape application args 158 | save () { 159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 160 | echo " " 161 | } 162 | APP_ARGS=$(save "$@") 163 | 164 | # Collect all arguments for the java command, following the shell quoting and substitution rules 165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 166 | 167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 169 | cd "$(dirname "$0")" 170 | fi 171 | 172 | exec "$JAVACMD" "$@" 173 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @if "%DEBUG%" == "" @echo off 2 | @rem ########################################################################## 3 | @rem 4 | @rem Gradle startup script for Windows 5 | @rem 6 | @rem ########################################################################## 7 | 8 | @rem Set local scope for the variables with windows NT shell 9 | if "%OS%"=="Windows_NT" setlocal 10 | 11 | set DIRNAME=%~dp0 12 | if "%DIRNAME%" == "" set DIRNAME=. 13 | set APP_BASE_NAME=%~n0 14 | set APP_HOME=%DIRNAME% 15 | 16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 17 | set DEFAULT_JVM_OPTS= 18 | 19 | @rem Find java.exe 20 | if defined JAVA_HOME goto findJavaFromJavaHome 21 | 22 | set JAVA_EXE=java.exe 23 | %JAVA_EXE% -version >NUL 2>&1 24 | if "%ERRORLEVEL%" == "0" goto init 25 | 26 | echo. 27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 28 | echo. 29 | echo Please set the JAVA_HOME variable in your environment to match the 30 | echo location of your Java installation. 31 | 32 | goto fail 33 | 34 | :findJavaFromJavaHome 35 | set JAVA_HOME=%JAVA_HOME:"=% 36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 37 | 38 | if exist "%JAVA_EXE%" goto init 39 | 40 | echo. 41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 42 | echo. 43 | echo Please set the JAVA_HOME variable in your environment to match the 44 | echo location of your Java installation. 45 | 46 | goto fail 47 | 48 | :init 49 | @rem Get command-line arguments, handling Windows variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | 53 | :win9xME_args 54 | @rem Slurp the command line arguments. 55 | set CMD_LINE_ARGS= 56 | set _SKIP=2 57 | 58 | :win9xME_args_slurp 59 | if "x%~1" == "x" goto execute 60 | 61 | set CMD_LINE_ARGS=%* 62 | 63 | :execute 64 | @rem Setup the command line 65 | 66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 67 | 68 | @rem Execute Gradle 69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 70 | 71 | :end 72 | @rem End local scope for the variables with windows NT shell 73 | if "%ERRORLEVEL%"=="0" goto mainEnd 74 | 75 | :fail 76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 77 | rem the _cmd.exe /c_ return code! 78 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 79 | exit /b 1 80 | 81 | :mainEnd 82 | if "%OS%"=="Windows_NT" endlocal 83 | 84 | :omega 85 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | rootProject.name = 'kotlin-coroutines-grpc-template' 2 | 3 | include 'api' -------------------------------------------------------------------------------- /src/main/kotlin/GreeterService.kt: -------------------------------------------------------------------------------- 1 | import io.grpc.Status 2 | import io.grpc.examples.helloworld.GreeterCoroutineGrpc 3 | import io.grpc.examples.helloworld.HelloReply 4 | import io.grpc.examples.helloworld.HelloRequest 5 | import kotlinx.coroutines.Dispatchers 6 | import kotlinx.coroutines.asContextElement 7 | import kotlinx.coroutines.channels.ReceiveChannel 8 | import kotlinx.coroutines.channels.SendChannel 9 | import kotlinx.coroutines.channels.consumeEach 10 | import kotlinx.coroutines.channels.toList 11 | import kotlin.coroutines.CoroutineContext 12 | 13 | class GreeterService : GreeterCoroutineGrpc.GreeterImplBase() { 14 | 15 | val myThreadLocal = ThreadLocal.withInitial { "value" }.asContextElement() 16 | 17 | override val initialContext: CoroutineContext 18 | get() = Dispatchers.Default + myThreadLocal 19 | 20 | 21 | private val validNameRegex = Regex("[^0-9]*") 22 | 23 | override suspend fun sayHello(request: HelloRequest): HelloReply { 24 | 25 | if (request.name.matches(validNameRegex)) { 26 | return HelloReply.newBuilder() 27 | .setMessage("Hello there, ${request.name}!") 28 | .build() 29 | } else { 30 | throw Status.INVALID_ARGUMENT.asRuntimeException() 31 | } 32 | } 33 | 34 | override suspend fun sayHelloStreaming( 35 | requestChannel: ReceiveChannel, 36 | responseChannel: SendChannel 37 | ) { 38 | requestChannel.consumeEach { request -> 39 | 40 | responseChannel 41 | .send { message = "Hello there, ${request.name}!" } 42 | } 43 | } 44 | 45 | override suspend fun sayHelloClientStreaming( 46 | requestChannel: ReceiveChannel 47 | ): HelloReply { 48 | 49 | return HelloReply.newBuilder() 50 | .setMessage(requestChannel.toList().joinToString()) 51 | .build() 52 | } 53 | 54 | override suspend fun sayHelloServerStreaming(request: HelloRequest, responseChannel: SendChannel) { 55 | 56 | for(char in request.name) { 57 | responseChannel.send { 58 | message = "Hello $char!" 59 | } 60 | } 61 | } 62 | } -------------------------------------------------------------------------------- /src/main/kotlin/main.kt: -------------------------------------------------------------------------------- 1 | import com.github.marcoferrer.krotoplus.coroutines.launchProducerJob 2 | import com.github.marcoferrer.krotoplus.coroutines.withCoroutineContext 3 | import io.grpc.Channel 4 | import io.grpc.Server 5 | import io.grpc.examples.helloworld.GreeterCoroutineGrpc 6 | import io.grpc.examples.helloworld.send 7 | import io.grpc.inprocess.InProcessChannelBuilder 8 | import io.grpc.inprocess.InProcessServerBuilder 9 | import kotlinx.coroutines.* 10 | import kotlinx.coroutines.channels.consumeEach 11 | 12 | val server: Server = InProcessServerBuilder 13 | .forName("helloworld") 14 | .addService(GreeterService()) 15 | .directExecutor() 16 | .build() 17 | .start() 18 | 19 | val channel: Channel = InProcessChannelBuilder 20 | .forName("helloworld") 21 | .directExecutor() 22 | .build() 23 | 24 | suspend fun main(){ 25 | 26 | // Optional coroutineContext. Default is Dispatchers.Unconfined 27 | val stub = GreeterCoroutineGrpc 28 | .newStub(channel) 29 | .withCoroutineContext() 30 | 31 | performUnaryCall(stub) 32 | 33 | performBidiCall(stub) 34 | 35 | performClientStreamingCall(stub) 36 | 37 | performServerStreamingCall(stub) 38 | 39 | 40 | server.shutdown() 41 | } 42 | 43 | suspend fun performUnaryCall(stub: GreeterCoroutineGrpc.GreeterCoroutineStub){ 44 | 45 | val unaryResponse = stub.sayHello { name = "John" } 46 | 47 | println("Unary Response: ${unaryResponse.message}") 48 | } 49 | 50 | suspend fun performServerStreamingCall(stub: GreeterCoroutineGrpc.GreeterCoroutineStub){ 51 | 52 | val responseChannel = stub.sayHelloServerStreaming { name = "John" } 53 | 54 | responseChannel.consumeEach { 55 | println("Server Streaming Response: ${it.message}") 56 | } 57 | } 58 | 59 | suspend fun performClientStreamingCall(stub: GreeterCoroutineGrpc.GreeterCoroutineStub) = coroutineScope{ 60 | 61 | // Client Streaming RPC 62 | val (requestChannel, response) = stub.sayHelloClientStreaming() 63 | 64 | launchProducerJob(requestChannel){ 65 | repeat(5){ 66 | send { name = "person #$it" } 67 | } 68 | } 69 | 70 | println("Client Streaming Response: ${response.await().toString().trim()}") 71 | } 72 | 73 | suspend fun performBidiCall(stub: GreeterCoroutineGrpc.GreeterCoroutineStub) = coroutineScope { 74 | 75 | val (requestChannel, responseChannel) = stub.sayHelloStreaming() 76 | 77 | launchProducerJob(requestChannel){ 78 | repeat(5){ 79 | send { name = "person #$it" } 80 | } 81 | } 82 | 83 | responseChannel.consumeEach { 84 | println("Bidi Response: ${it.message}") 85 | } 86 | } --------------------------------------------------------------------------------