/// <summary>
/// Asynchronously fetches RD data on the function from R.
/// </summary>
public async Task <string> GetFunctionRdDataAsync(string functionName, string packageName)
{
if (packageName.EqualsOrdinal("rtvs"))
{
return(GetRtvsFunctionRdData(functionName));
}
await TaskUtilities.SwitchToBackgroundThread();
await _host.CreateSessionAsync();
string command = GetCommandText(functionName, packageName);
try {
return(await _host.Session.EvaluateAsync <string>(command, REvaluationKind.Normal));
} catch (RException) { }
// Sometimes there is no information in a specific package.
// For example, Matrix exports 'as.matrix' and base does it as well.
// However, help('as.matrix', 'Matrix') will fail while help('as.matrix' will succeed.
command = GetCommandText(functionName, null);
try {
return(await _host.Session.EvaluateAsync <string>(command, REvaluationKind.Normal));
} catch (RException) { }
return(string.Empty);
}
public async Task BuildIndexAsync()
{
var ready = await _buildIndexLock.WaitAsync();
try {
if (!ready)
{
var startTotalTime = DateTime.Now;
await TaskUtilities.SwitchToBackgroundThread();
await _host.CreateSessionAsync();
Debug.WriteLine("R function host start: {0} ms", (DateTime.Now - startTotalTime).TotalMilliseconds);
var startTime = DateTime.Now;
// Fetch list of available packages from R session
await BuildPackageListAsync();
Debug.WriteLine("R package names/description: {0} ms", (DateTime.Now - startTime).TotalMilliseconds);
// Populate function index for preloaded packages first
startTime = DateTime.Now;
await BuildPreloadedPackagesFunctionListAsync();
Debug.WriteLine("R function index (preloaded): {0} ms", (DateTime.Now - startTime).TotalMilliseconds);
// Populate function index for all remaining packages
startTime = DateTime.Now;
await BuildRemainingPackagesFunctionListAsync();
Debug.WriteLine("R function index (remaining): {0} ms", (DateTime.Now - startTime).TotalMilliseconds);
await _functionIndex.BuildIndexAsync(this);
Debug.WriteLine("R function index total: {0} ms", (DateTime.Now - startTotalTime).TotalMilliseconds);
}
} catch (RHostDisconnectedException ex) {
Debug.WriteLine(ex.Message);
} finally {
_buildIndexLock.Release();
}
}