本文整理匯總了Java中org.apache.hadoop.mapreduce.Counters.getGroupNames方法的典型用法代碼示例。如果您正苦於以下問題：Java Counters.getGroupNames方法的具體用法？Java Counters.getGroupNames怎麽用？Java Counters.getGroupNames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.mapreduce.Counters的用法示例。
在下文中一共展示了Counters.getGroupNames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: printCounters
import org.apache.hadoop.mapreduce.Counters; //導入方法依賴的package包/類
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));
}
}
}