gRPC ALTS

[jiangtaoli2016]

gRPC Java ALTS code. The codes are the same as the internal version, except (1) changes in the import header, and (2) a few minor cosmetics changes such as adding comments on test files to avoid checkstyle errors.

Tested:
./gradlew build
In examples directory, manually tested on a real GCE VM.
./gradlew build
./gradlew installDist
./build/install/examples/bin/hello-world-alts-server
./build/install/examples/bin/hello-world-alts-client

[jyane]

Just a question: Does it work with Windows? Or grpc-java does not support Windows with Bazel?

Same problems will appear other projects (e.g. grpc-services).
Previous discussions are available at here.

[jiangtaoli2016]

For windows, you could either use gradle or compile in linux then copy .jar to windows.

Once bazel team has a fix on this problem bazelbuild/bazel#4544, I will remove this genrule.

[jyane]

Thanks.

[jiangtaoli2016]

It seems that all the tests failures are due to Deprecated method valueOf() called in generated code.
protocolbuffers/protobuf#2054
protocolbuffers/protobuf#4046
It seems that protobuf already suppress the warning in the last trunk. But kokoro still uses older version of protobuf compiler.

[ejona86]

In alts/build.gradle, you can add after configureProtoCompilation():

[compileJava, compileTestJava].each() {
        // protobuf calls valueof. Will be fixed in next release (google/protobuf#4046)
        it.options.compilerArgs += ["-Xlint:-deprecated"]
}

[jiangtaoli2016]

All tests are passing.

[carl-mastrangelo]

LGTM