Extraction in separate process Leave feedback

Extracting data from documents is the most resource-intensive operation of the indexing process. And in case of insufficient memory, an exception occurs that completely interrupts the process of indexing a group of documents. To prevent this situation, data can be extracted in a separate process. In this case, insufficient memory when extracting data from one document will lead to a failure in indexing only this document. Indexing of the remaining documents in the group will continue further.

Extracting data from documents in a separate process also solves another problem – the problem of immediate interruption of a document indexing process when the allocated time limit for indexing one document is exceeded.

To extract data from documents in a separate process, you need to configure the appropriate indexing options, and also create a simple console application project that the GroupDocs.Search library will run in a separate process as a data extraction service. The console application project for data extraction must have the GroupDocs.Search library as a dependency, as does the main project using the library. The console application project code is presented in the following listing.

C#

public class Program
{
    static void Main(string[] args)
    {
        using (var host = new GroupDocs.Search.ExtractionHost(args))
        {
            host.Run();
        }
    }
}

An example of setting indexing options for data extraction in a separate process is shown in the listing below.

C#

string indexFolder = @"c:\MyIndex\";
string documentFolder = @"c:\MyDocuments\";

// Getting the path to the console application location
string assemblyPath = typeof(GroupDocs.Search.Extraction.Program).Assembly.Location;

// Creating an index in the specified folder
Index index = new Index(indexFolder);

// Setting indexing options for data extraction in a separate process
IndexingOptions options = new IndexingOptions();
options.SeparateProcessOptions.ExtractInSeparateProcess = true;
options.SeparateProcessOptions.AssemblyPath = assemblyPath;
options.SeparateProcessOptions.Timeout = new TimeSpan(0, 1, 0);

// Indexing documents from the specified folder
index.Add(documentFolder, options);

You may easily run the code from documentation articles and see the features in action in our GitHub examples:

• GroupDocs.Search for .NET examples

• GroupDocs.Search for Java examples

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