grpc-java

develop grpc client by using java

Compile .proto file

We need to generate the gRPC client and server interface from the .proto service definition. We do this through the protocol buffer's compiler protoc and a special gRPC Java plugin.

• Ubuntu 18.04.2 LTS

install protoc compiler

sudo apt-get install libprotoc-dev

execute *.sh文件

xx@xx-ubuntu:~/workspace/intellij/grpc-java/src/main/proto$ ./account/account.sh

Generate AccountGrpc.java and AccountProto.java after success

• Windows

The address downloaded by the compiler protoc and the gRPC Java plugin has been written in the plugins.txt file，you can write a batch after successful download.

New grpc client for java

For example:

com/aurora/proto/account/ccountClient.java

private final ManagedChannel channel;
private AccountGrpc.AccountBlockingStub blockingStub;

public AccountClient(String host, int port) {
    channel = ManagedChannelBuilder.forAddress(host, port)
            .usePlaintext()
            .build();

    blockingStub = AccountGrpc.newBlockingStub(channel);
}
    
public List<ByteString> accounts() {
    CommonProto.AccountsRequest request = CommonProto.AccountsRequest.newBuilder().build();
    CommonProto.AccountsReply reply = blockingStub.accounts(request);
    if (reply == null) {
        return null;
    }

    List<ByteString> accounts = reply.getAccountsList();
    for (ByteString account : accounts) {
        System.out.println(Utils.byteStringToHex(account));
    }
    return accounts;
}