The Document Conversion Service must be running, either locally or on a remote computer for files or folders of files to be converted. If it is not running the ConvertFile, ConvertFolder, ConvertFileList and CombineFiles methods will all return immediately with an error.
In some scenarios, such as using these methods from another long running service, it may be desirable to wait for Document Conversion Service to be running instead of failing to convert the files.
This can be done in either of two ways:
•use the IsConversionServiceRunning check to detect the running state in your code and wait in your own loop accordingly
•pass a wait timeout value as a custom setting down the any of the methods to have the PEERNET.ConvertUtility wait
Detect Running State
The following code demonstrates using the IsConversionServiceRunning method to wait a maximum of fifteen minutes for the conversion service to be running. With this method, you can provide feedback or the ability to cancel on shorter intervals.
PNConversionItem resultItem = null;
Boolean bIsRunning = false;
int maxTimeout = 900000, // 15 minutes
currentTimeout = 0;
do
{
if (PNConverter.IsConversionServiceRunning(String.Empty))
{
bIsRunning = true;
resultItem = PNConverter.ConvertFolder(@"C:\Test\InputFiles",
true, // include subfolders
"*.pdf", // filter
String.Empty, // exclude filter
@"C:\Test\Output", // output folder
true, // overwrite existing
false, // remove file ext
false, // create log
"TIFF 200dpi OptimizedColor", // settings
String.Empty, // extensison profile
String.Empty, // MIME profile
null, // User settings
String.Empty, // not using remote conversion (DCOM)
String.Empty, // use default working folder
String.Empty);
}
else
{
if (currentTimeout < maxTimeout)
{
// Sleep for 30 seconds
Console.WriteLine("Waiting for service to be available...");
Thread.Sleep(30000);
currentTimeout += 30000;
}
else
{
Console.WriteLine("Timeout on available service. No conversion performed.");
bIsRunning = true;
}
}
} while (!bIsRunning );
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Passing the Timeout Value to the PEERNET.ConvertUtility
The following code demonstrates passing the timeout value to the PEERNET.ConvertUtility to have the utility wait for the desired maximum of fifteen minutes for the conversion service to be running. In this case, if the conversion service is not running in the timeout value given the PNConversionItem object resultItem returned will contain the error message that the conversion service is not running.
PNConversionItem resultItem = null;
// Pass down how long to wait for the conversion service to be running.
Dictionary<String, String> customSettings = new Dictionary<String, String>();
customSettings["SecondsToWaitForRunningConversionService" ] = "900"; // 15 minutes max
resultItem = PNConverter.ConvertFolder(@"C:\Test\InputFiles",
true, // include subfolders
"*.pdf", // filter
String.Empty, // exclude filter
@"C:\Test\Output", // output folder
true, // overwrite existing
false, // remove file ext
false, // create log
"TIFF 200dpi OptimizedColor", // settings
String.Empty, // extensison profile
String.Empty, // MIME profile
customSettings, // User settings
String.Empty, // not using remote conversion (DCOM)
String.Empty, // use default working folder
String.Empty);
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