Hi,
I didn't get much from the examples of gRPC so I'm trying to build my own
Java server and client. So far I have managed to build my own proto file
and use protoc to create Java class from it. My proto file is like this:
syntax = "proto3";
option java_package = "testing";
option java_outer_classname = "TTTService";
package testing;
// The TTT service definition.
service Game {
// Sends status of game
rpc SayStatus (Placexor) returns (GameStatus) {}
}
message Placexor {
int32 row = 1; // row
int32 column = 2; // column
int32 gameid = 3; // games id
}
message GameStatus {
string iswin = 1;
string isturn = 2;
int32 gameid = 3;
int32 success = 4;
}
It is a server for TicTacToe game so I'm trying to have client to send the
row, column, and gamenumbers and server will answer whether it has been
succesfully done and if it is players turn etc. I'm currently stuck and
cannot figure out how to proceed. I tried to copy code from
HelloWorldServer and alter it to get better understanding. My server code
looks currently like this:
public class Server {
private int port = 1234;
private io.grpc.Server server;
/**
* @param args
* @throws IOException
* @throws InterruptedException
*/
public static void main(String[] args) throws IOException,
InterruptedException {
final Server server = new Server();
server.start();
}
private void start() throws IOException {
//server = ServerBuilder.forPort(port).addService(new
Listener()).build().start();
server = ServerBuilder.forPort(port).addService(new TTTService()).
build().start();
System.err.println("Server started and listening in port: "+port);
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
// Use stderr here since the logger may have been reset by
its JVM shutdown hook.
System.err.println("*** shutting down gRPC server since JVM
is shutting down");
Server.this.stop();
System.err.println("*** server shut down");
}
});
}
Which results in null pointer. Have I totally misunderstood everything and
how should I continue from this?
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