Berkeley DB XML ¶àÏß³ÌÌí¼ÓÎĵµÀý×Ó

import java.io.File;
import java.util.concurrent.CountDownLatch;

import com.sleepycat.db.Environment;
import com.sleepycat.db.EnvironmentConfig;
import com.sleepycat.db.LockDetectMode;
import com.sleepycat.dbxml.XmlContainer;
import com.sleepycat.dbxml.XmlContainerConfig;
import com.sleepycat.dbxml.XmlDocument;
import com.sleepycat.dbxml.XmlDocumentConfig;
import com.sleepycat.dbxml.XmlException;
import com.sleepycat.dbxml.XmlManager;
import com.sleepycat.dbxml.XmlManagerConfig;
import com.sleepycat.dbxml.XmlQueryContext;
import com.sleepycat.dbxml.XmlResults;
import com.sleepycat.dbxml.XmlTransaction;
import com.sleepycat.dbxml.XmlUpdateContext;

public class DbxmlThreads extends Thread {

public static XmlManager mgr = null;
public static String containerName = "test.dbxml";
public static Environment dbEnv = null;
private static XmlContainer cont = null;

static {
EnvironmentConfig envConf = new EnvironmentConfig();
envConf.setThreaded(true);
envConf.setAllowCreate(true);
envConf.setTransactional(true);
envConf.setInitializeCache(true);
envConf.setInitializeLocking(true);
envConf.setInitializeLogging(true);
envConf.setCacheSize(64 * 1024 * 1024);
envConf.setLockDetectMode(LockDetectMode.DEFAULT);

XmlManagerConfig xmlMgrConfig = new XmlManagerConfig();
xmlMgrConfig.setAdoptEnvironment(true);

File dbHome = new File(".");

try {
dbEnv = new Environment(dbHome, envConf);
mgr = new XmlManager(dbEnv, xmlMgrConfig);

// ´´½¨XmlContainer
if(mgr.existsContainer(containerName)!=0)