package org.geotools.gml3;

import java.io.File;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import org.eclipse.xsd.XSDSchema;
import org.geotools.xml.Schemas;
import org.junit.Test;

public class SchemasTest {

    @Test
    public void testConcurrentParse() throws Exception {
        URL location = SchemasTest.class.getResource("states.xsd");
        final File schemaFile = new File(location.toURI());
        final List locators = Arrays.asList( GML.getInstance().createSchemaLocator() );
        
        ExecutorService es = Executors.newFixedThreadPool(32);
        List<Future<Void>> results = new ArrayList<Future<Void>>();
        for(int i = 0; i < 128; i++) {
            Future<Void> future = es.submit(new Callable<Void>() {

                public Void call() throws Exception {
                    XSDSchema schema = Schemas.parse( schemaFile.getAbsolutePath(), locators, null );
                    Schemas.dispose(schema);
                    return null;
                }
                
            });
            results.add(future);
        }
        
        // make sure none threw an exception
        for (Future<Void> future : results) {
            future.get();
        }
    }
}