本文整理汇总了Java中org.apache.hadoop.mapred.TaskLog.Reader方法的典型用法代码示例。如果您正苦于以下问题：Java TaskLog.Reader方法的具体用法？Java TaskLog.Reader怎么用？Java TaskLog.Reader使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.mapred.TaskLog的用法示例。
在下文中一共展示了TaskLog.Reader方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: readTaskLog
import org.apache.hadoop.mapred.TaskLog; //导入方法依赖的package包/类
/**
* Reads tasklog and returns it as string after trimming it.
*
* @param filter
* Task log filter; can be STDOUT, STDERR, SYSLOG, DEBUGOUT, PROFILE
* @param taskId
* The task id for which the log has to collected
* @param isCleanup
* whether the task is a cleanup attempt or not.
* @return task log as string
* @throws IOException
*/
public static String readTaskLog(TaskLog.LogName filter,
org.apache.hadoop.mapred.TaskAttemptID taskId, boolean isCleanup)
throws IOException {
// string buffer to store task log
StringBuffer result = new StringBuffer();
int res;
// reads the whole tasklog into inputstream
InputStream taskLogReader = new TaskLog.Reader(taskId, filter, 0, -1,
isCleanup);
// construct string log from inputstream.
byte[] b = new byte[65536];
while (true) {
res = taskLogReader.read(b);
if (res > 0) {
result.append(new String(b));
} else {
break;
}
}
taskLogReader.close();
// trim the string and return it
String str = result.toString();
str = str.trim();
return str;
}