Example usage for org.apache.hadoop.conf Configuration getClassByName

Introduction

In this page you can find the example usage for org.apache.hadoop.conf Configuration getClassByName.

Prototype

public Class<?> getClassByName(String name) throws ClassNotFoundException

Source Link

Document

Load a class by name.

Usage

From source file:org.apache.hama.bsp.sync.SyncServiceFactory.java

License:Apache License

public static SyncClient getMasterSyncClient(Configuration conf) throws ClassNotFoundException {
    return (SyncClient) ReflectionUtils.newInstance(
            conf.getClassByName(conf.get(SYNC_MASTER_CLASS, ZKSyncBSPMasterClient.class.getName())), conf);
}

From source file:org.apache.hama.bsp.sync.SyncServiceFactory.java

License:Apache License

/**
 * Returns a sync server via reflection based on what was configured.
 *//*  w ww .  j av a 2  s  . c o  m*/
public static SyncServer getSyncServer(Configuration conf) throws ClassNotFoundException {
    return (SyncServer) ReflectionUtils.newInstance(conf.getClassByName(conf.get(SYNC_SERVER_CLASS,
            org.apache.hama.bsp.sync.ZooKeeperSyncServerImpl.class.getCanonicalName())), conf);
}

From source file:org.apache.hama.ipc.AsyncServer.java

License:Apache License

static Class<?> getProtocolClass(String protocolName, Configuration conf) throws ClassNotFoundException {
    Class<?> protocol = PROTOCOL_CACHE.get(protocolName);
    if (protocol == null) {
        protocol = conf.getClassByName(protocolName);
        PROTOCOL_CACHE.put(protocolName, protocol);
    }/* w w  w .  j a  v  a  2 s. c  o  m*/
    return protocol;
}

From source file:org.apache.hama.util.BSPNetUtils.java

License:Apache License

/**
 * Get the socket factory corresponding to the given proxy URI. If the given
 * proxy URI corresponds to an absence of configuration parameter, returns
 * null. If the URI is malformed raises an exception.
 * /*w  w  w.java2  s.co  m*/
 * @param propValue the property which is the class name of the SocketFactory
 *          to instantiate; assumed non null and non empty.
 * @return a socket factory as defined in the property value.
 */
public static SocketFactory getSocketFactoryFromProperty(Configuration conf, String propValue) {

    try {
        Class<?> theClass = conf.getClassByName(propValue);
        return (SocketFactory) org.apache.hadoop.util.ReflectionUtils.newInstance(theClass, conf);

    } catch (ClassNotFoundException cnfe) {
        throw new RuntimeException("Socket Factory class not found: " + cnfe);
    }
}

From source file:org.apache.hawq.pxf.plugins.hdfs.utilities.HdfsUtilities.java

License:Apache License

private static Class<? extends CompressionCodec> getCodecClass(Configuration conf, String name) {

    Class<? extends CompressionCodec> codecClass;
    try {//ww  w  .  ja v a 2  s.  c  o  m
        codecClass = conf.getClassByName(name).asSubclass(CompressionCodec.class);
    } catch (ClassNotFoundException e) {
        throw new IllegalArgumentException("Compression codec " + name + " was not found.", e);
    }
    return codecClass;
}

From source file:org.apache.lens.lib.query.LensFileOutputFormat.java

License:Apache License

/**
 * Gets the output compressor class./*from   w  w  w  . ja  v  a2  s.c o m*/
 *
 * @param conf the conf
 * @return the output compressor class
 */
public static Class<? extends CompressionCodec> getOutputCompressorClass(Configuration conf) {
    Class<? extends CompressionCodec> codecClass;

    String name = conf.get(LensConfConstants.QUERY_OUTPUT_COMPRESSION_CODEC,
            LensConfConstants.DEFAULT_OUTPUT_COMPRESSION_CODEC);
    try {
        codecClass = conf.getClassByName(name).asSubclass(CompressionCodec.class);
    } catch (ClassNotFoundException e) {
        throw new IllegalArgumentException("Compression codec " + name + " was not found.", e);
    }
    return codecClass;
}

From source file:org.apache.lens.server.api.driver.hooks.ChainedDriverQueryHook.java

License:Apache License

public static ChainedDriverQueryHook from(Configuration conf, String key) throws LensException {
    String[] classNames = conf.getStrings(key);
    List<DriverQueryHook> hooks = Lists.newArrayList();
    if (classNames != null) {
        for (String className : classNames) {
            Class<? extends DriverQueryHook> clazz;
            try {
                clazz = conf.getClassByName(className).asSubclass(DriverQueryHook.class);
            } catch (ClassNotFoundException e) {
                throw new LensException("Couldn't load class " + className, e);
            }//  www .j a v a  2 s.c  om
            DriverQueryHook instance;
            try {
                instance = clazz.newInstance();
            } catch (InstantiationException | IllegalAccessException e) {
                throw new LensException("Couldn't create instance of class " + clazz.getName(), e);
            }
            if (instance instanceof Configurable) {
                ((Configurable) instance).setConf(conf);
            }
            hooks.add(instance);
        }
    }
    return new ChainedDriverQueryHook(hooks);
}

From source file:org.apache.lens.server.api.retry.ChainedRetryPolicyDecider.java

License:Apache License

public static <FC extends FailureContext> ChainedRetryPolicyDecider<FC> from(Configuration conf, String key)
        throws LensException {
    String[] classNames = conf.getStrings(key);
    List<RetryPolicyDecider<FC>> retryPolicyDeciders = Lists.newArrayList();
    if (classNames != null) {
        for (String className : classNames) {
            Class<? extends RetryPolicyDecider<FC>> clazz;
            try {
                clazz = (Class<? extends RetryPolicyDecider<FC>>) conf.getClassByName(className)
                        .asSubclass(RetryPolicyDecider.class);
            } catch (ClassNotFoundException e) {
                throw new LensException("Couldn't load class " + className, e);
            }/*from  www. j  a v  a  2s  . c o  m*/
            RetryPolicyDecider<FC> instance;
            try {
                instance = clazz.newInstance();
            } catch (InstantiationException | IllegalAccessException e) {
                throw new LensException("Couldn't create instance of class " + clazz.getName(), e);
            }
            if (instance instanceof Configurable) {
                ((Configurable) instance).setConf(conf);
            }
            retryPolicyDeciders.add(instance);
        }
    }
    return new ChainedRetryPolicyDecider<>(retryPolicyDeciders);
}

From source file:org.apache.mahout.clustering.conversion.InputMapper.java

License:Apache License

@Override
protected void setup(Context context) throws IOException, InterruptedException {
    super.setup(context);
    Configuration conf = context.getConfiguration();
    String vectorImplClassName = conf.get("vector.implementation.class.name");
    try {//from w  w  w .j  a v  a2 s .c  o  m
        Class<? extends Vector> outputClass = conf.getClassByName(vectorImplClassName).asSubclass(Vector.class);
        constructor = outputClass.getConstructor(int.class);
    } catch (NoSuchMethodException e) {
        throw new IllegalStateException(e);
    } catch (ClassNotFoundException e) {
        throw new IllegalStateException(e);
    }
}

From source file:org.apache.mahout.clustering.syntheticcontrol.canopy.InputMapper.java

License:Apache License

@Override
protected void setup(Context context) throws IOException, InterruptedException {
    super.setup(context);
    Configuration conf = context.getConfiguration();
    String vectorImplClassName = conf.get("vector.implementation.class.name");
    try {/* w  w w  . j  a  v a 2  s .c  o  m*/
        Class<? extends Vector> outputClass = conf.getClassByName(vectorImplClassName).asSubclass(Vector.class);
        constructor = outputClass.getConstructor(int.class);
    } catch (NoSuchMethodException e) {
        throw new IllegalStateException(e);
    } catch (ClassNotFoundException e) {
        throw new IllegalStateException(e);
    }

}