本文整理匯總了Java中org.apache.hadoop.conf.Configuration.getClassLoader方法的典型用法代碼示例。如果您正苦於以下問題：Java Configuration.getClassLoader方法的具體用法？Java Configuration.getClassLoader怎麽用？Java Configuration.getClassLoader使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.hadoop.conf.Configuration的用法示例。
在下文中一共展示了Configuration.getClassLoader方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: callWithJobClassLoader
import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
* Executes the given action with the job classloader set as the configuration
* classloader as well as the thread context class loader if the job
* classloader is enabled. After the call, the original classloader is
* restored.
*
* If the job classloader is enabled and the code needs to load user-supplied
* classes via configuration or thread context classloader, this method should
* be used in order to load them.
*
* @param conf the configuration on which the classloader will be set
* @param action the callable action to be executed
*/
<T> T callWithJobClassLoader(Configuration conf, Action<T> action) {
// if the job classloader is enabled, we may need it to load the (custom)
// classes; we make the job classloader available and unset it once it is
// done
ClassLoader currentClassLoader = conf.getClassLoader();
boolean setJobClassLoader =
jobClassLoader != null && currentClassLoader != jobClassLoader;
if (setJobClassLoader) {
MRApps.setClassLoader(jobClassLoader, conf);
}
try {
return action.call(conf);
} finally {
if (setJobClassLoader) {
// restore the original classloader
MRApps.setClassLoader(currentClassLoader, conf);
}
}
}