private Result <List <KeyValue> > GetKeyValuesFromConsul(string name)
{
// Default lookup key is actual key preceded by default folder prefix
var key = KeyUtilities.GetDefaultLookupKey(name);
try
{
var keyVal = KeyValue.Create(key);
// Get the URL to call. Use ?recurse to get any potential matches
var url = $"{consulUri.CombineWith(keyVal.ToGetUrl())}?recurse";
log.Debug($"Calling {url} to get values");
var result = url.SendStringToUrl("GET", accept: "application/json");
// Consul KV always returns a collection
var keyValues = result.FromJson <List <KeyValue> >();
return(keyValues.Count == 0 ? Result <List <KeyValue> > .Fail() : Result <List <KeyValue> > .Success(keyValues));
}
catch (Exception ex)
{
log.Error($"Error getting config value with key {key}", ex);
return(Result <List <KeyValue> > .Fail());
}
}
/// <inheritdoc />
public virtual void Set <T>(string key, T value)
{
key.ThrowIfNullOrEmpty(nameof(key));
var setKey = KeyUtilities.GetKeyForSpecificity(key, setSpecificity);
log.Debug($"Key {setKey} will be used for setting value for provided key: {key}");
var keyVal = KeyValue.Create(setKey, value);
string result;
try
{
result = consulUri.CombineWith(keyVal.ToPutUrl()).PutJsonToUrl(keyVal.Value);
}
catch (Exception ex)
{
var message = $"Error setting value {value} to configuration {key}. SetKey: {setKey}";
log.Error(message, ex);
throw new ConfigurationErrorsException($"Error setting configuration key {setKey}", ex);
}
// Consul returns true|false to signify success
bool success;
if (!bool.TryParse(result, out success) || !success)
{
log.Warn($"Error setting value {value} to configuration {key}. SetKey: {setKey}");
throw new ConfigurationErrorsException($"Error setting configuration key {setKey}");
}
}
private Result <T> GetValue <T>(string name)
{
var resultValues = GetKeyValuesFromConsul(name);
if (!resultValues.IsSuccess)
{
return(Result <T> .Fail());
}
var kv = KeyUtilities.GetMostSpecificMatch(resultValues.Value, name);
try
{
return(Result <T> .Success(kv.GetValue <T>()));
}
catch (NotSupportedException ex)
{
log.Error($"Unable to deserialise config value with key {name}", ex);
return(Result <T> .Fail());
}
catch (SerializationException ex)
{
log.Error($"Unable to deserialise config value with key {name}", ex);
return(Result <T> .Fail());
}
}
