@SuppressWarnings("unchecked")
public static <Request extends ModbusRequest, Response extends ModbusResponse>
ModbusTcpServiceRequest<Request, Response> of(ModbusTcpPayload payload, Channel channel) {
return new ModbusTcpServiceRequest<>(
payload.getTransactionId(),
payload.getUnitId(),
(Request) payload.getModbusPdu(),
channel);
}
private void onChannelRead(ChannelHandlerContext ctx, ModbusTcpPayload payload) {
ServiceRequestHandler handler = requestHandler.get();
if (handler == null) return;
switch (payload.getModbusPdu().getFunctionCode()) {
case ReadCoils:
handler.onReadCoils(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
case ReadDiscreteInputs:
handler.onReadDiscreteInputs(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
case ReadHoldingRegisters:
handler.onReadHoldingRegisters(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
case ReadInputRegisters:
handler.onReadInputRegisters(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
case WriteSingleCoil:
handler.onWriteSingleCoil(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
case WriteSingleRegister:
handler.onWriteSingleRegister(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
case WriteMultipleCoils:
handler.onWriteMultipleCoils(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
case WriteMultipleRegisters:
handler.onWriteMultipleRegisters(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
case MaskWriteRegister:
handler.onMaskWriteRegister(ModbusTcpServiceRequest.of(payload, ctx.channel()));
break;
default:
/* Function code not currently supported */
ExceptionResponse response =
new ExceptionResponse(
payload.getModbusPdu().getFunctionCode(), ExceptionCode.IllegalFunction);
ctx.writeAndFlush(
new ModbusTcpPayload(payload.getTransactionId(), payload.getUnitId(), response));
break;
}
}