Example usage for java.lang Thread getContextClassLoader

Introduction

In this page you can find the example usage for java.lang Thread getContextClassLoader.

Prototype

@CallerSensitive
public ClassLoader getContextClassLoader() 

Source Link

Document

Returns the context ClassLoader for this thread.

Usage

From source file:Main.java

/**
 * Override the thread context ClassLoader with the environment's bean ClassLoader
 * if necessary, i.e. if the bean ClassLoader is not equivalent to the thread
 * context ClassLoader already./* w  w w.j a va  2 s  .c o  m*/
 *
 * @param classLoaderToUse the actual ClassLoader to use for the thread context
 * @return the original thread context ClassLoader, or {@code null} if not overridden
 */
public static ClassLoader overrideThreadContextClassLoader(ClassLoader classLoaderToUse) {
    Thread currentThread = Thread.currentThread();
    ClassLoader threadContextClassLoader = currentThread.getContextClassLoader();
    if (classLoaderToUse != null && !classLoaderToUse.equals(threadContextClassLoader)) {
        currentThread.setContextClassLoader(classLoaderToUse);
        return threadContextClassLoader;
    } else {
        return null;
    }
}

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From source file:org.openmrs.util.MemoryLeakUtil.java

public static void shutdownKeepAliveTimer() {
    try {//from  w w w .j a v  a2 s .c o  m
        final Field kac = HttpClient.class.getDeclaredField("kac");

        kac.setAccessible(true);
        final Field keepAliveTimer = KeepAliveCache.class.getDeclaredField("keepAliveTimer");

        keepAliveTimer.setAccessible(true);

        final Thread thread = (Thread) keepAliveTimer.get(kac.get(null));

        if (thread.getContextClassLoader() == OpenmrsClassLoader.getInstance()) {
            //Set to system class loader such that we can be garbage collected.
            thread.setContextClassLoader(ClassLoader.getSystemClassLoader());
        }
    } catch (final Exception e) {
        log.error(e.getMessage(), e);
    }
}

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From source file:br.com.riselabs.cotonet.model.db.Database.java

public static Connection getConnection() {
    Thread currentThread = Thread.currentThread();
    ClassLoader classloader = currentThread.getContextClassLoader();
    InputStream input = classloader.getResourceAsStream("db.properties");
    Properties prop = new Properties();
    try {/*  w  w  w . ja v  a2  s  .c om*/
        if (input != null) {
            prop.load(input);
            input.close();
        } else {
            Logger.logStackTrace(new FileNotFoundException("The file 'db.properties was not found."));
        }
    } catch (IOException e) {
        Logger.logStackTrace(e);
    }
    String db = prop.getProperty("database.name");
    String user = prop.getProperty("database.user");
    String pass = prop.getProperty("database.password");
    return getConnection(db, user, pass);
}

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From source file:Main.java

/**
 * <P>Attempts to find the most suitable {@link ClassLoader} as follows:</P>
 * <UL>//  w  w w.j av a 2s .c  o  m
 * <LI><P>
 * Check the {@link Thread#getContextClassLoader()} value
 * </P></LI>
 *
 * <LI><P>
 * If no thread context class loader then check the anchor
 * class (if given) for its class loader
 * </P></LI>
 *
 * <LI><P>
 * If still no loader available, then use {@link ClassLoader#getSystemClassLoader()}
 * </P></LI>
 * </UL>
 *
 * @param anchor The anchor {@link Class} to use if no current thread
 *               - ignored if {@code null}
 *               context class loader
 * @return The resolver {@link ClassLoader}
 */
public static ClassLoader resolveDefaultClassLoader(Class<?> anchor) {
    Thread thread = Thread.currentThread();
    ClassLoader cl = thread.getContextClassLoader();
    if (cl != null) {
        return cl;
    }

    if (anchor != null) {
        cl = anchor.getClassLoader();
    }

    if (cl == null) { // can happen for core Java classes
        cl = ClassLoader.getSystemClassLoader();
    }

    return cl;
}

---

From source file:org.nuxeo.ecm.platform.uidgen.service.UIDSequencerImpl.java

private static void activatePersistenceProvider() {
    Thread thread = Thread.currentThread();
    ClassLoader last = thread.getContextClassLoader();
    try {//from  w  w w  .ja  va 2 s  .  c  o  m
        thread.setContextClassLoader(PersistenceProvider.class.getClassLoader());
        PersistenceProviderFactory persistenceProviderFactory = Framework
                .getLocalService(PersistenceProviderFactory.class);
        persistenceProvider = persistenceProviderFactory.newProvider("NXUIDSequencer");
        persistenceProvider.openPersistenceUnit();
    } finally {
        thread.setContextClassLoader(last);
    }
}

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From source file:edu.wisc.nexus.auth.rut.realm.NexusSecurityTestCaseSupport.java

public static void copyFile(File destDir, String dir, String filename) throws IOException {
    final File confDir;
    if (dir != null && dir.length() > 0) {
        if (!dir.endsWith("/")) {
            dir = dir + "/";
        }/*from   www .  j  a va 2 s  .  c  o  m*/

        confDir = new File(destDir, dir);
        confDir.mkdirs();
    } else {
        dir = "";
        confDir = destDir;
    }

    final Thread currentThread = Thread.currentThread();
    final ClassLoader contextClassLoader = currentThread.getContextClassLoader();
    final String src = dir + filename;
    final InputStream fileStream = contextClassLoader.getResourceAsStream(src);
    final File dest = new File(confDir, filename);
    try {
        FileUtils.copyStreamToFile(new RawInputStreamFacade(fileStream), dest);
    } catch (Exception e) {
        throw new IOException("Failed to copy " + src + " to " + dest, e);
    } finally {
        IOUtils.closeQuietly(fileStream);
    }
}

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From source file:com.liferay.portal.test.TestUtil.java

private static void setPortletClassLoader() {
    //Had to add this for GA2
    Thread currentThread = Thread.currentThread();
    ClassLoader contextClassLoader = currentThread.getContextClassLoader();
    PortletClassLoaderUtil.setClassLoader(contextClassLoader);
}

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From source file:org.carewebframework.ui.util.MemoryLeakPreventionUtil.java

/**
 * CWI-1409/*from   w w  w .jav a 2  s . c o  m*/
 * <p>
 * This does what Tomcat 7 context attribute clearReferencesHttpClientKeepAliveThread is
 * suggested to do but doesn't. Using reflection in this manner is a last resort.
 * <ul>
 * <li>JDK 7 is said to fix the keepAliveTimer thread bug.</li>
 * <li>Tomcat 7.0.x context attribute clearReferencesHttpClientKeepAliveThread is suggested to
 * fix this leak but does not</li>
 * </p>
 */
@SuppressWarnings("restriction")
protected static void clearReferencesHttpClientKeepAliveThread() {
    try {
        final Field kac = sun.net.www.http.HttpClient.class.getDeclaredField("kac");
        kac.setAccessible(true);
        final Field keepAliveTimer = sun.net.www.http.KeepAliveCache.class.getDeclaredField("keepAliveTimer");
        keepAliveTimer.setAccessible(true);

        final Thread t = (Thread) keepAliveTimer.get(kac.get(null));//kac is a static field, hence null argument
        if (t != null) {//May not actually be running
            log.debug("KeepAliveTimer contextClassLoader: " + t.getContextClassLoader());
            if (t.getContextClassLoader() == Thread.currentThread().getContextClassLoader()) {
                t.setContextClassLoader(ClassLoader.getSystemClassLoader());
                log.info("Changed KeepAliveTimer classloader to system to prevent leak.");
            }
        }
    } catch (final Exception e) {
        log.warn(
                "Exception occurred attempting to prevent sun.net.www.http.HttpClient keepAliveTimer memory leak. Note: this code should not be necessary w/ java7",
                e);
    }

}

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From source file:com.liferay.portal.util.InitUtil.java

public static synchronized void init() {
    if (_initialized) {
        return;//from   ww w .j a  va 2 s .  c om
    }

    StopWatch stopWatch = null;

    if (_PRINT_TIME) {
        stopWatch = new StopWatch();

        stopWatch.start();
    }

    // Set the default locale used by Liferay. This locale is no longer set
    // at the VM level. See LEP-2584.

    String userLanguage = SystemProperties.get("user.language");
    String userCountry = SystemProperties.get("user.country");
    String userVariant = SystemProperties.get("user.variant");

    LocaleUtil.setDefault(userLanguage, userCountry, userVariant);

    // Set the default time zone used by Liferay. This time zone is no
    // longer set at the VM level. See LEP-2584.

    String userTimeZone = SystemProperties.get("user.timezone");

    TimeZoneUtil.setDefault(userTimeZone);

    // Shared class loader

    try {
        Thread currentThread = Thread.currentThread();

        PortalClassLoaderUtil.setClassLoader(currentThread.getContextClassLoader());
    } catch (Exception e) {
        e.printStackTrace();
    }

    // Log4J

    if (GetterUtil.getBoolean(SystemProperties.get("log4j.configure.on.startup"), true)) {

        ClassLoader classLoader = InitUtil.class.getClassLoader();

        Log4JUtil.configureLog4J(classLoader.getResource("META-INF/portal-log4j.xml"));
        try {
            Log _log = LogFactoryUtil.getLog(InitUtil.class);

            String configName = "META-INF/portal-log4j-ext.xml";
            Enumeration<URL> configs = classLoader.getResources(configName);
            if (_log.isDebugEnabled() && !configs.hasMoreElements()) {
                _log.debug("No " + configName + " has been found");
            }
            while (configs.hasMoreElements()) {
                URL config = configs.nextElement();
                Log4JUtil.configureLog4J(config);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // Shared log

    try {
        LogFactoryUtil.setLogFactory(new Log4jLogFactoryImpl());
    } catch (Exception e) {
        e.printStackTrace();
    }

    // Cache registry

    CacheRegistryUtil.setCacheRegistry(new CacheRegistryImpl());

    // Configuration factory

    ConfigurationFactoryUtil.setConfigurationFactory(new ConfigurationFactoryImpl());

    // Data source factory

    DataSourceFactoryUtil.setDataSourceFactory(new DataSourceFactoryImpl());

    // DB factory

    DBFactoryUtil.setDBFactory(new DBFactoryImpl());

    // Java properties

    JavaProps.isJDK5();

    // ROME

    XmlReader.setDefaultEncoding(StringPool.UTF8);

    if (_PRINT_TIME) {
        System.out.println("InitAction takes " + stopWatch.getTime() + " ms");
    }

    _initialized = true;
}

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From source file:at.molindo.utils.reflect.ClassUtils.java

/**
 * @param thread/*  w  w  w.j ava 2  s.  co  m*/
 *            {@link Thread} to use for
 *            {@link Thread#getContextClassLoader() context ClassLoader} or
 *            <code>null</code> for {@link Thread#currentThread() current
 *            thread}
 * @param fallback
 *            {@link ClassLoader} providing class if no context classloader
 *            or <code>null</code> for this class
 * @return never <code>null</code>
 */
public static ClassLoader getClassLoader(Thread thread, Class<?> fallback) {
    if (thread == null) {
        thread = Thread.currentThread();
    }
    ClassLoader loader = thread.getContextClassLoader();

    if (loader == null) {
        loader = (fallback != null ? fallback : ClassUtils.class).getClassLoader();
    }

    if (loader == null) {
        ClassLoader.getSystemClassLoader();
    }

    return loader;
}

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