本文整理匯總了Java中org.apache.hadoop.conf.Configuration.getClassByNameOrNull方法的典型用法代碼示例。如果您正苦於以下問題：Java Configuration.getClassByNameOrNull方法的具體用法？Java Configuration.getClassByNameOrNull怎麽用？Java Configuration.getClassByNameOrNull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.getClassByNameOrNull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: setJobConf
import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
* This code is to support backward compatibility and break the compile
* time dependency of core on mapred.
* This should be made deprecated along with the mapred package HADOOP-1230.
* Should be removed when mapred package is removed.
*/
private static void setJobConf(Object theObject, Configuration conf) {
//If JobConf and JobConfigurable are in classpath, AND
//theObject is of type JobConfigurable AND
//conf is of type JobConf then
//invoke configure on theObject
try {
Class<?> jobConfClass =
conf.getClassByNameOrNull("org.apache.hadoop.mapred.JobConf");
if (jobConfClass == null) {
return;
}
Class<?> jobConfigurableClass =
conf.getClassByNameOrNull("org.apache.hadoop.mapred.JobConfigurable");
if (jobConfigurableClass == null) {
return;
}
if (jobConfClass.isAssignableFrom(conf.getClass()) &&
jobConfigurableClass.isAssignableFrom(theObject.getClass())) {
Method configureMethod =
jobConfigurableClass.getMethod("configure", jobConfClass);
configureMethod.invoke(theObject, conf);
}
} catch (Exception e) {
throw new RuntimeException("Error in configuring object", e);
}
}