Example usage for java.lang Class getClassLoader

Introduction

In this page you can find the example usage for java.lang Class getClassLoader.

Prototype

@CallerSensitive
@ForceInline 
public ClassLoader getClassLoader() 

Source Link

Document

Returns the class loader for the class.

Usage

From source file:com.alibaba.wasp.ipc.WaspRPC.java

private static synchronized RpcEngine getProtocolEngine(Class protocol, Configuration conf) {
    RpcEngine engine = PROTOCOL_ENGINES.get(protocol);
    if (engine == null) {
        // check for a configured default engine
        Class<?> defaultEngine = conf.getClass(RPC_ENGINE_PROP, ProtobufRpcEngine.class);

        // check for a per interface override
        Class<?> impl = conf.getClass(RPC_ENGINE_PROP + "." + protocol.getName(), defaultEngine);
        LOG.debug("Using " + impl.getName() + " for " + protocol.getName());
        engine = (RpcEngine) ReflectionUtils.newInstance(impl, conf);
        if (protocol.isInterface())
            PROXY_ENGINES.put(Proxy.getProxyClass(protocol.getClassLoader(), protocol), engine);
        PROTOCOL_ENGINES.put(protocol, engine);
    }//from www . j a v  a2s . c  om
    return engine;
}

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From source file:ml.shifu.dtrain.DTrainRequestProcessor.java

/**
 * Find a jar that contains a class of the same name, if any. It will return a jar file, even if that is not the
 * first thing on the class path that has a class with the same name.
 * /*from  w ww .j a  v  a 2  s  .  com*/
 * @param myClass
 *            the class to find
 * @return a jar file that contains the class, or null
 */
@SuppressWarnings("rawtypes")
private static String findContainingJar(Class myClass) {
    ClassLoader loader = myClass.getClassLoader();
    String classFile = myClass.getName().replaceAll("\\.", "/") + ".class";
    try {
        for (Enumeration itr = loader.getResources(classFile); itr.hasMoreElements();) {
            URL url = (URL) itr.nextElement();
            if ("jar".equals(url.getProtocol())) {
                String toReturn = url.getPath();
                if (toReturn.startsWith("file:")) {
                    toReturn = toReturn.substring("file:".length());
                }
                // URLDecoder is a misnamed class, since it actually decodes
                // x-www-form-urlencoded MIME type rather than actual
                // URL encoding (which the file path has). Therefore it
                // would
                // decode +s to ' 's which is incorrect (spaces are actually
                // either unencoded or encoded as "%20"). Replace +s first,
                // so
                // that they are kept sacred during the decoding process.
                toReturn = toReturn.replaceAll("\\+", "%2B");
                toReturn = URLDecoder.decode(toReturn, "UTF-8");
                return toReturn.replaceAll("!.*$", "");
            } else if ("file".equals(url.getProtocol())) {
                String toReturn = url.getPath();
                toReturn = toReturn.replaceAll("\\+", "%2B");
                toReturn = URLDecoder.decode(toReturn, "UTF-8");
                return toReturn.replaceAll("!.*$", "");
            }
        }
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    return null;
}

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From source file:ml.shifu.guagua.yarn.GuaguaYarnClient.java

/**
 * Find a jar that contains a class of the same name, if any. It will return a jar file, even if that is not the
 * first thing on the class path that has a class with the same name.
 * //w w w  .ja  va 2  s  .  co m
 * @param my_class
 *            the class to find.
 * @return a jar file that contains the class, or null.
 * @throws IOException
 *             in case when read class file.
 */
private static String findContainingJar(Class<?> my_class) {
    ClassLoader loader = my_class.getClassLoader();
    String class_file = my_class.getName().replaceAll("\\.", "/") + ".class";
    try {
        for (Enumeration<?> itr = loader.getResources(class_file); itr.hasMoreElements();) {
            URL url = (URL) itr.nextElement();
            if ("jar".equals(url.getProtocol())) {
                String toReturn = url.getPath();
                if (toReturn.startsWith("file:")) {
                    toReturn = toReturn.substring("file:".length());
                }
                // URLDecoder is a misnamed class, since it actually decodes
                // x-www-form-urlencoded MIME type rather than actual
                // URL encoding (which the file path has). Therefore it would
                // decode +s to ' 's which is incorrect (spaces are actually
                // either unencoded or encoded as "%20"). Replace +s first, so
                // that they are kept sacred during the decoding process.
                toReturn = toReturn.replaceAll("\\+", "%2B");
                toReturn = URLDecoder.decode(toReturn, "UTF-8");
                return toReturn.replaceAll("!.*$", "");
            }
        }
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    return null;
}

---

From source file:net.yasion.common.core.bean.wrapper.CachedIntrospectionResults.java

/**
 * Create CachedIntrospectionResults for the given bean class.
 * /*from  w ww  .  j a  va 2s . c o m*/
 * @param beanClass
 *            the bean class to analyze
 * @return the corresponding CachedIntrospectionResults
 * @throws BeansException
 *             in case of introspection failure
 */
public static CachedIntrospectionResults forClass(Class<?> beanClass) throws BeansException {
    CachedIntrospectionResults results = strongClassCache.get(beanClass);
    if (results != null) {
        return results;
    }
    results = softClassCache.get(beanClass);
    if (results != null) {
        return results;
    }

    results = new CachedIntrospectionResults(beanClass);
    ConcurrentMap<Class<?>, CachedIntrospectionResults> classCacheToUse;

    if (ClassUtils.isCacheSafe(beanClass, CachedIntrospectionResults.class.getClassLoader())
            || isClassLoaderAccepted(beanClass.getClassLoader())) {
        classCacheToUse = strongClassCache;
    } else {
        if (logger.isDebugEnabled()) {
            logger.debug(
                    "Not strongly caching class [" + beanClass.getName() + "] because it is not cache-safe");
        }
        classCacheToUse = softClassCache;
    }

    CachedIntrospectionResults existing = classCacheToUse.putIfAbsent(beanClass, results);
    return (existing != null ? existing : results);
}

---

From source file:org.dhatim.util.ClassUtil.java

/**
 * Get the specified resource as a stream.
 *
 * @param resourceName/*  w w w. jav  a2 s  . co m*/
 *            The name of the class to load.
 * @param caller
 *            The class of the caller.
 * @return The input stream for the resource or null if not found.
 */
public static InputStream getResourceAsStream(final String resourceName, final Class caller) {
    final String resource;

    if (!resourceName.startsWith("/")) {
        final Package callerPackage = caller.getPackage();
        if (callerPackage != null) {
            resource = callerPackage.getName().replace('.', '/') + '/' + resourceName;
        } else {
            resource = resourceName;
        }

        return getResourceAsStream(resource, caller.getClassLoader());
    } else {
        return getResourceAsStream(resourceName, caller.getClassLoader());
    }
}

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From source file:org.apache.hadoop.ipc.RPC.java

/** Construct a client-side proxy object that implements the named protocol,
 * talking to a server at the named address. */
public static VersionedProtocol getProxy(Class<? extends VersionedProtocol> protocol, long clientVersion,
        InetSocketAddress addr, UserGroupInformation ticket, Configuration conf, SocketFactory factory,
        int rpcTimeout) throws IOException {

    if (UserGroupInformation.isSecurityEnabled()) {
        SaslRpcServer.init(conf);//from  w w w.  j  a  v  a  2s . c o m
    }
    VersionedProtocol proxy = (VersionedProtocol) Proxy.newProxyInstance(protocol.getClassLoader(),
            new Class[] { protocol }, new Invoker(protocol, addr, ticket, conf, factory, rpcTimeout));
    long serverVersion = proxy.getProtocolVersion(protocol.getName(), clientVersion);
    if (serverVersion == clientVersion) {
        return proxy;
    } else {
        throw new VersionMismatch(protocol.getName(), clientVersion, serverVersion);
    }
}

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From source file:com.springframework.beans.CachedIntrospectionResults.java

/**
 * Create CachedIntrospectionResults for the given bean class.
 * @param beanClass the bean class to analyze
 * @return the corresponding CachedIntrospectionResults
 * @throws BeansException in case of introspection failure
 *///from  w  w  w. jav a 2s  .  c  o m
@SuppressWarnings("unchecked")
static CachedIntrospectionResults forClass(Class<?> beanClass) throws BeansException {
    CachedIntrospectionResults results = strongClassCache.get(beanClass);
    if (results != null) {
        return results;
    }
    results = softClassCache.get(beanClass);
    if (results != null) {
        return results;
    }

    results = new CachedIntrospectionResults(beanClass);
    ConcurrentMap<Class<?>, CachedIntrospectionResults> classCacheToUse;

    if (ClassUtils.isCacheSafe(beanClass, CachedIntrospectionResults.class.getClassLoader())
            || isClassLoaderAccepted(beanClass.getClassLoader())) {
        classCacheToUse = strongClassCache;
    } else {
        if (logger.isDebugEnabled()) {
            logger.debug(
                    "Not strongly caching class [" + beanClass.getName() + "] because it is not cache-safe");
        }
        classCacheToUse = softClassCache;
    }

    CachedIntrospectionResults existing = classCacheToUse.putIfAbsent(beanClass, results);
    return (existing != null ? existing : results);
}

---

From source file:org.apache.hadoop.hbase.ipc.HBaseClientRPC.java

static synchronized RpcClientEngine getProtocolEngine(Class<? extends IpcProtocol> protocol,
        Configuration conf) {//from  w w w.  j a v a  2 s  .  c  om
    RpcClientEngine engine = PROTOCOL_ENGINES.get(protocol);
    if (engine == null) {
        // check for a configured default engine
        Class<?> defaultEngine = conf.getClass(RPC_ENGINE_PROP, ProtobufRpcClientEngine.class);

        // check for a per interface override
        Class<?> impl = conf.getClass(RPC_ENGINE_PROP + "." + protocol.getName(), defaultEngine);
        LOG.debug("Using " + impl.getName() + " for " + protocol.getName());
        engine = (RpcClientEngine) ReflectionUtils.newInstance(impl, conf);
        if (protocol.isInterface()) {
            PROXY_ENGINES.put(Proxy.getProxyClass(protocol.getClassLoader(), protocol), engine);
        }
        PROTOCOL_ENGINES.put(protocol, engine);
    }
    return engine;
}

---

From source file:org.codice.ddf.itests.common.AbstractIntegrationTest.java

public static InputStream getFileContentAsStream(String filePath, Class classRelativeToResource) {
    return classRelativeToResource.getClassLoader().getResourceAsStream(filePath);
}

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From source file:com.depas.utils.FileUtils.java

private static String getConfigDirectoryPath(Class<?> c, String rootDirectory) {
    // get url to iwc/idc directory on classpath
    try {//  w  w w  . j a va2  s  .c  o m
        URL url = ClassLoader.getSystemResource(rootDirectory);
        if (url == null) {
            // try this classpath, for running in eclipse
            url = c.getClassLoader().getResource(rootDirectory);
        }
        if (url != null) {
            String path = url.getPath();
            if (!path.endsWith("\\") && !path.endsWith("/")) {
                path += "/";
            }
            return URLDecoder.decode(path, "UTF-8");
        } else {
            return null;
        }
    } catch (Exception ex) {
        logger.warn("Error obtaining file path to '" + rootDirectory + "' config directory: " + ex);
        return null;
    }

}

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