public string GetPV(string pv)
{
try
{
EpicsWrapper.EpicsReturnValue retVal;
if (cache.Keys.Contains(pv) && cache[pv].LastUpdated + expires > DateTime.UtcNow)
{
retVal = cache[pv].Value;
}
else
{
retVal = _epics.GetPV(pv, false);
addToCache(pv, retVal);
}
return ConvertToJson(retVal);
}
catch (Exception err)
{
EpicsReturnValue retVal = new EpicsReturnValue();
retVal.Name = pv;
retVal.Error = err.Message;
return ConvertToJson(retVal);
}
}
//public async Task<EpicsReturnValue> GetPVAsync(string pvname, bool waveformAsString)
//{
// EpicsReturnValue retVal = new EpicsReturnValue();
// retVal.Name = pvname;
// try
// {
// if (!_channels.ContainsKey(pvname))
// {
// createChannel(pvname);
// }
// Type chtype = _channels[pvname].ChannelDefinedType;
// uint numelem = _channels[pvname].ChannelDataCount;
// if (numelem > 1 && chtype == typeof(byte))
// {
// //It is probably a waveform of some sort
// Task<byte[]> wave = _channels[pvname].GetAsync<byte[]>();
// byte[] waveContents = await wave;
// retVal.Type = "Waveform";
// if (waveformAsString)
// {
// retVal.Value = waveformToString(waveContents);
// }
// else
// {
// retVal.Value = wave;
// }
// }
// else if (chtype == typeof(Enum))
// {
// //For enums (bo, bi, mbbi, mbbo) get the numerical value and the string value (may be empty)
// Task<string> sval = _channels[pvname].GetAsync<string>();
// Task<int> val = _channels[pvname].GetAsync<int>();
// await Task.WhenAll(sval, val);
// retVal.Type = chtype.Name.ToString();
// retVal.Value = await val;
// retVal.StrValue = await sval;
// }
// else
// {
// //Simple value
// Task<object> val = _channels[pvname].GetAsync<object>();
// retVal.Type = chtype.Name.ToString();
// retVal.Value = await val;
// retVal.StrValue = retVal.Value.ToString();
// }
// }
// catch (Exception er)
// {
// retVal.Error = er.Message;
// }
// return retVal;
//}
public EpicsReturnValue GetPV(string pvname, bool waveformAsString)
{
EpicsReturnValue retVal = new EpicsReturnValue();
retVal.Name = pvname;
try
{
//Double checking to ensure thread safety
if (!_channels.ContainsKey(pvname)) //First check
{
lock (channelsLock)
{
if (!_channels.ContainsKey(pvname)) //Second check
{
createChannel(pvname);
}
}
}
Type chtype = _channels[pvname].ChannelDefinedType;
uint numelem = _channels[pvname].ChannelDataCount;
object value = null;
if (numelem > 1 && chtype == typeof(byte))
{
//It is probably a waveform of some sort
byte[] val = _channels[pvname].Get<byte[]>();
retVal.Type = "Waveform";
if (waveformAsString)
{
retVal.Value = waveformToString(val);
}
else
{
retVal.Value = val;
}
}
else if (chtype == typeof(Enum))
{
//For enums (bo, bi, mbbi, mbbo) get the numerical value and the string value (may be empty)
string svalue = _channels[pvname].Get<string>();
value = _channels[pvname].Get<int>();
retVal.Type = chtype.Name.ToString();
retVal.Value = value;
retVal.StrValue = svalue;
}
else
{
//Simple value
value = _channels[pvname].Get<object>();
retVal.Type = chtype.Name.ToString();
retVal.Value = value;
retVal.StrValue = value.ToString();
}
}
catch (Exception er)
{
retVal.Error = er.Message;
}
return retVal;
}
public string GetWaveformDehexedDecompressed(string pv)
{
try
{
EpicsWrapper.EpicsReturnValue retVal;
if (cache.Keys.Contains(pv) && cache[pv].LastUpdated + expires > DateTime.UtcNow)
{
retVal = cache[pv].Value;
}
else
{
retVal = _epics.GetPV(pv, true);
retVal.Value = unzip(dehex(retVal.Value.ToString()));
addToCache(pv, retVal);
}
return ConvertToJson(retVal);
}
catch (Exception err)
{
EpicsReturnValue retVal = new EpicsReturnValue();
retVal.Name = pv;
retVal.Error = err.Message;
return ConvertToJson(retVal);
}
}
private static string ConvertToJson(EpicsReturnValue retVal)
{
try
{
var serializer = new JavaScriptSerializer();
var serializedResult = serializer.Serialize(retVal);
return serializedResult;
}
catch (Exception err)
{
return "{}";
}
}
