本文整理汇总了Java中org.apache.hadoop.mapreduce.Counters.getGroupNames方法的典型用法代码示例。如果您正苦于以下问题：Java Counters.getGroupNames方法的具体用法？Java Counters.getGroupNames怎么用？Java Counters.getGroupNames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.mapreduce.Counters的用法示例。
在下文中一共展示了Counters.getGroupNames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: printCounters
import org.apache.hadoop.mapreduce.Counters; //导入方法依赖的package包/类
private void printCounters(StringBuffer buff, Counters totalCounters,
Counters mapCounters, Counters reduceCounters) {
// Killed jobs might not have counters
if (totalCounters == null) {
return;
}
buff.append("\nCounters: \n\n");
buff.append(String.format("|%1$-30s|%2$-30s|%3$-10s|%4$-10s|%5$-10s|",
"Group Name",
"Counter name",
"Map Value",
"Reduce Value",
"Total Value"));
buff.append("\n------------------------------------------"+
"---------------------------------------------");
for (String groupName : totalCounters.getGroupNames()) {
CounterGroup totalGroup = totalCounters.getGroup(groupName);
CounterGroup mapGroup = mapCounters.getGroup(groupName);
CounterGroup reduceGroup = reduceCounters.getGroup(groupName);
Format decimal = new DecimalFormat();
Iterator<org.apache.hadoop.mapreduce.Counter> ctrItr =
totalGroup.iterator();
while(ctrItr.hasNext()) {
org.apache.hadoop.mapreduce.Counter counter = ctrItr.next();
String name = counter.getName();
String mapValue =
decimal.format(mapGroup.findCounter(name).getValue());
String reduceValue =
decimal.format(reduceGroup.findCounter(name).getValue());
String totalValue =
decimal.format(counter.getValue());
buff.append(
String.format("%n|%1$-30s|%2$-30s|%3$-10s|%4$-10s|%5$-10s",
totalGroup.getDisplayName(),
counter.getDisplayName(),
mapValue, reduceValue, totalValue));
}
}
}