// Parses a string in the format:
// provider := <provider_name><optional_counter_list>
// provider_name := string not containing '['
// optional_counter_list := [<comma_separated_counter_names>]
// For example:
// System.Runtime
// System.Runtime[exception-count]
// System.Runtime[exception-count,cpu-usage]
void ParseCounterProvider(string providerText, CounterSet counters)
{
string[] tokens = providerText.Split('[');
if (tokens.Length == 0)
{
throw new FormatException("Expected non-empty counter_provider");
}
if (tokens.Length > 2)
{
throw new FormatException("Expected at most one '[' in counter_provider");
}
string providerName = tokens[0];
if (tokens.Length == 1)
{
counters.AddAllProviderCounters(providerName); // Only a provider name was specified
}
else
{
string counterNames = tokens[1];
if (!counterNames.EndsWith(']'))
{
if (counterNames.IndexOf(']') == -1)
{
throw new FormatException("Expected to find closing ']' in counter_provider");
}
else
{
throw new FormatException("Unexpected characters after closing ']' in counter_provider");
}
}
string[] enabledCounters = counterNames.Substring(0, counterNames.Length - 1).Split(',', StringSplitOptions.RemoveEmptyEntries);
counters.AddProviderCounters(providerName, enabledCounters);
}
}
internal CounterSet ConfigureCounters(string commaSeparatedProviderListText, List <string> providerList)
{
CounterSet counters = new CounterSet();
try
{
if (commaSeparatedProviderListText != null)
{
ParseProviderList(commaSeparatedProviderListText, counters);
}
}
catch (FormatException e)
{
// the FormatException message strings thrown by ParseProviderList are controlled
// by us and anticipate being integrated into the command-line error text.
throw new CommandLineErrorException("Error parsing --counters argument: " + e.Message);
}
if (providerList != null)
{
try
{
foreach (string providerText in providerList)
{
ParseCounterProvider(providerText, counters);
}
}
catch (FormatException e)
{
// the FormatException message strings thrown by ParseCounterProvider are controlled
// by us and anticipate being integrated into the command-line error text.
throw new CommandLineErrorException("Error parsing counter_list: " + e.Message);
}
}
if (counters.IsEmpty)
{
_console.Out.WriteLine($"--counters is unspecified. Monitoring System.Runtime counters by default.");
counters.AddAllProviderCounters("System.Runtime");
}
return(counters);
}
