grpc-kotlin | HTTP/2 based RPC

I fixed the issue by adding api("io.grpc:grpc-kotlin-stub:1.0.0") Thanks to https://github.com/grpc/grpc-kotlin/issues/220 help.

So my build.gradle is now:

Starting from version 0.2.0, protoc-gen-grpc-kotlin is a Jar instead of a platform-dependent binary (https://repo1.maven.org/maven2/io/grpc/protoc-gen-grpc-kotlin/1.0.0/). So in your protobuf configuration block, it should should be grpckt { artifact = "io.grpc:protoc-gen-grpc-kotlin:1.0.0:jdk7@jar"}.

(Note if you do not specify the artifact extension, the protobuf plugin will pick the one based on your platform.)

Also, you probably do not need implementation("io.grpc:protoc-gen-grpc-kotlin:1.0.0") in your project's dependency.

You need to add kotlinx-coroutines-core dependency to resolve scopes(runBlocking/launch).

Here is the link to maven repo: https://mvnrepository.com/artifact/org.jetbrains.kotlinx/kotlinx-coroutines-core

Scope documentation:
https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/-coroutine-scope/index.html

Once you have scopes added to your project you should be able to run suspended functions within non-suspending block.Also, you making use CoroutineExceptionHandler to handle errors. https://kotlinlang.org/docs/reference/coroutines/exception-handling.html#coroutineexceptionhandler

Technically, the controller should handoff any long-running operations to another thread and return the appropriate response. So you are doing anything weird.

When using mvnrepository.com, take note of which repository the module is available in as you only have JCenter configured for your build (which is usually fine, just not in this case). Here the dependency is in the Confluent repository:

So you will need to add this repository to your build:

The compiler doesn't tell you the member is not initialized, it's telling you that you are not allowed to call functions in the class body without them being part of a member declaration.

e.g.

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