GetXMLResourceNoLockTest.java example

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package org.exist.storage.lock;


import java.io.IOException;
import java.util.Optional;

import org.exist.collections.triggers.TriggerException;
import org.exist.security.PermissionDeniedException;
import org.exist.test.ExistWebServer;
import org.exist.util.LockException;
import org.junit.*;
import org.exist.dom.persistent.BinaryDocument;
import org.exist.EXistException;
import org.exist.xmldb.XmldbURI;
import org.exist.test.TestConstants;
import org.exist.collections.Collection;
import org.exist.storage.BrokerPool;
import org.exist.storage.DBBroker;
import org.exist.storage.lock.Lock.LockMode;
import org.exist.storage.txn.TransactionManager;
import org.exist.storage.txn.Txn;

import static org.junit.Assert.*;

/**
 * 
 * @author Patrick Bosek<patrick.bosek@jorsek.com>
 *
 */
public class GetXMLResourceNoLockTest {

	@ClassRule
	public static final ExistWebServer existWebServer = new ExistWebServer(false, false, false, true);

    private static String EMPTY_BINARY_FILE = "What's an up dog?";
    private static XmldbURI DOCUMENT_NAME_URI = XmldbURI.create("empty.txt");
	
	@Test
	public void testCollectionMaintainsLockWhenResourceIsSelectedNoLock() throws EXistException, InterruptedException, PermissionDeniedException, LockException, IOException, TriggerException {

		storeTestResource();

        final BrokerPool pool = BrokerPool.getInstance();

		try(final DBBroker broker = pool.get(Optional.of(pool.getSecurityManager().getSystemSubject()))) {
			final Collection testCollection = broker.openCollection(TestConstants.TEST_COLLECTION_URI, LockMode.READ_LOCK);
			try {

		    	final XmldbURI docPath = TestConstants.TEST_COLLECTION_URI.append(DOCUMENT_NAME_URI);

	    		final BinaryDocument binDoc = (BinaryDocument) broker.getXMLResource(docPath, LockMode.NO_LOCK);

    			// if document is not present, null is returned
			    if(binDoc == null) {
				    fail("Binary document '" + docPath + " does not exist.");
                }

			    assertEquals("Collection does not have lock!", true, testCollection.getLock().hasLock());
				
			} finally {
	    		if(testCollection != null) {
					testCollection.getLock().release(LockMode.READ_LOCK);
				}
			}
		}
	}

    private void storeTestResource() throws EXistException, PermissionDeniedException, IOException, TriggerException, LockException {
        final BrokerPool pool = BrokerPool.getInstance();

        final TransactionManager transact = pool.getTransactionManager();
        try(final DBBroker broker = pool.get(Optional.of(pool.getSecurityManager().getSystemSubject()));
                final Txn transaction = transact.beginTransaction()) {

            final Collection collection = broker
                    .getOrCreateCollection(transaction, TestConstants.TEST_COLLECTION_URI);
            
            broker.saveCollection(transaction, collection);
            
            @SuppressWarnings("unused")
			final BinaryDocument doc =
                    collection.addBinaryResource(transaction, broker,
                    DOCUMENT_NAME_URI , EMPTY_BINARY_FILE.getBytes(), "text/text");
            
            transact.commit(transaction);
        }
    }
}