public T withRetryUntilSuccess <T>(Func <SMBExecutor.triedNetworkCallRes <T> > action, cancellableDateTime deadline)
{
while (true)
{
SMBExecutor.triedNetworkCallRes <T> res = action();
if (!res.retryRequested)
{
if (res.error == null)
{
return(res.res);
}
if (!(res.error is Win32Exception) &&
!(res.error is TimeoutException) &&
!(res.error is IOException) &&
!(res.error is VimException))
{
throw res.error;
}
if (!deadline.stillOK)
{
throw res.error;
}
}
deadline.doCancellableSleep(TimeSpan.FromSeconds(3));
}
}
public executionResult getResultIfComplete()
{
// Read the return code last. We do this because there's no way in VMWare's guest tools specify file locking, so
// we may see empty files before they have been written to.
SMBExecutor.triedNetworkCallRes <string> returnCodeResultInfo = _host.tryGetFileFromGuestWithRes(_returnCodeFilename);
SMBExecutor.triedNetworkCallRes <string> stdOutResultInfo = _host.tryGetFileFromGuestWithRes(_stdOutFilename);
SMBExecutor.triedNetworkCallRes <string> stdErrResultInfo = _host.tryGetFileFromGuestWithRes(_stdErrFilename);
if (returnCodeResultInfo.retryRequested || returnCodeResultInfo.error != null ||
stdOutResultInfo.retryRequested || stdOutResultInfo.error != null ||
stdErrResultInfo.retryRequested || stdErrResultInfo.error != null)
{
return(null);
}
int retCode = Int32.Parse(returnCodeResultInfo.res);
string stdOut = stdOutResultInfo.res;
string stdErr = stdErrResultInfo.res;
return(new executionResult(stdOut, stdErr, retCode));
}
public static T doWithRetryOnSomeExceptions <T>(Func <SMBExecutor.triedNetworkCallRes <T> > thingtoDo,
cancellableDateTime deadline = null, TimeSpan retryDelay = default(TimeSpan))
{
if (retryDelay == default(TimeSpan))
{
retryDelay = TimeSpan.FromSeconds(1);
}
if (deadline == null)
{
deadline = new cancellableDateTime();
}
while (true)
{
SMBExecutor.triedNetworkCallRes <T> res = thingtoDo.Invoke();
if (!res.retryRequested)
{
if (res.error == null)
{
return(res.res);
}
if (res.error is VimException)
{
// This VimException is fatal
if (res.error.Message.Contains("are insufficient for the operation") ||
res.error.Message.Contains("Permission to perform this operation was denied."))
{
throw res.error;
}
// while others are not.
if (!deadline.stillOK)
{
throw res.error;
}
}
if (!(res.error is SocketException) &&
!(res.error is SoapException) &&
!(res.error is TimeoutException) &&
!(res.error is WebException) &&
!(res.error is hypervisorExecutionException) &&
!(res.error is hypervisorExecutionException_retryable) &&
!(res.error is SshOperationTimeoutException) &&
!(res.error is SshConnectionException) &&
!(res.error is UnauthorizedAccessException) &&
!(res.error is COMException))
{
// An exception of a type we don't anticipate, so throw
throw res.error;
}
// throw if the deadline has passed
if (!deadline.stillOK)
{
throw res.error;
}
}
// Otherwise, just retry.
deadline.doCancellableSleep(retryDelay);
}
}