private bool registerSensor(string sensorName)
{
ServiceConfiguration conf = ServiceConfiguration.Instance;
int lastReadIndex = this.dataCache.GetLastReadIndex(sensorName);
// e.g. http://localhost/sensor/registry/addSensor
string postAddr = $"http://{conf.registryAddress}:{conf.registryPort}/"
+ $"{conf.registerSensorPath}";
SensorDataArg reqArg = new SensorDataArg(sensorName,
conf.hostIP,
conf.listeningPort,
lastReadIndex);
string stringReqArg = JsonConvert.SerializeObject(reqArg);
Console.WriteLine($"Trying to register with: {stringReqArg} on: {postAddr} ... ");
// this method could possibly throw exception
HttpResponseMessage responseMessage = null;
try
{
responseMessage = httpClient
.PostAsync(postAddr, new StringContent(stringReqArg,
Encoding.UTF8,
"application/json"))
.Result; // .Result is going to force blocking execution
}
catch (Exception e)
{
this.logger.logError($"Exception in sensor registration on: {postAddr}, "
+ $" reason: {e.Message}");
return(false);
}
if (responseMessage != null &&
responseMessage.IsSuccessStatusCode)
{
return(true);
}
else
{
if (responseMessage == null)
{
// no response ... just failure
this.logger.logError("Http request for sensor registration failed ... ");
}
else
{
// status code is not success
this.logger.logError("Http response for registration failed: "
+ responseMessage.ReasonPhrase);
}
return(false);
}
}
public IActionResult updateSensor([FromBody] SensorDataArg reqArg)
{
ServiceConfiguration conf = ServiceConfiguration.Instance;
RegistryResponse response = sensorRegistry.updateSensorRecord(reqArg.SensorName,
reqArg.IpAddress,
reqArg.PortNum,
reqArg.LastReadIndex);
if (response.status == RegistryStatus.ok)
{
return(new OkObjectResult(response.singleData));
}
return(new BadRequestObjectResult("Registry response: " + response.status.ToString()));
}
public IActionResult postSensor([FromBody] SensorDataArg reqArg)
{
Console.WriteLine($"Sensor add trough post request: {reqArg.SensorName}");
RegistryResponse response = sensorRegistry.addSensorRecord(reqArg.SensorName,
reqArg.IpAddress,
reqArg.PortNum,
reqArg.LastReadIndex);
if (response.status == RegistryStatus.ok)
{
return(new OkObjectResult(response.singleData));
}
return(new BadRequestObjectResult("Registry response: " + response.status.ToString()));
}
