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Start External Server with TCP

Introduction​

Switching connection from WebSocket to TCP is simple. Just set connection method to ExternalJoinEnum.TCP.

@UtilityClass
public class MyExternalServer {
    ...
    public ExternalServerBuilder builder(int port, ExternalJoinEnum joinEnum) {
        var builder = ExternalMapper.builder(port);
        builder.setJoinEnum(joinEnum);

        return builder;
    }
}

class OneApplication {
    static void main() {
        var externalServer = MyExternalServer.builder(
                ExternalGlobalConfig.externalPort
                , ExternalJoinEnum.TCP
        ).build();

        new RunOne()
                ...
                .setExternalServer(externalServer)
                .startup();
    }
}

Simulated Client Test​

If server uses TCP, simulated client should also be set to TCP.

class OneClient {
    static void main() {
        new ClientRunOne()
                ...
                .setJoinEnum(ExternalJoinEnum.TCP)
                .startup();
    }
}

TCP Codec​

tip

TCP codec prepends 4 bytes indicating message-body size.

+--------+----------------+
|  int   | Actual Content |
| 0x000? | ExternalMessage|
+--------+----------------+