RPC (cpp) -如何检查gRPC通道是否连接成功？

#include <grpcpp/grpcpp.h>

void CheckChannelConnection(const std::shared_ptr<grpc::Channel>& channel) {
    grpc_connectivity_state state = channel->InUseState();
    if (state == GRPC_CHANNEL_READY) {
        std::cout << "Channel is connected successfully." << std::endl;
    } else {
        std::cout << "Channel is not ready. State: " << state << std::endl;
    }
}

#include <grpcpp/grpcpp.h>

void CheckChannelConnection(const std::shared_ptr<grpc::Channel>& channel) {
    grpc::CompletionQueue cq;
    grpc::ClientContext context;
    std::unique_ptr<grpc::ClientReaderWriter<grpc::ByteBuffer, grpc::ByteBuffer>> stream(channel->CreateCall(&context));

    void* tag;
    bool ok = false;
    while (cq.Next(&tag, &ok)) {
        if (ok && tag == reinterpret_cast<void*>(1)) {
            std::cout << "Channel is connected successfully." << std::endl;
            break;
        }
    }
}