Java AbstractCounters类代码示例

import org.apache.hadoop.mapreduce.counters.AbstractCounters; //导入依赖的package包/类
/**
 * Make the pre 0.21 counters string
 * @param <C> type of the counter
 * @param <G> type of the counter group
 * @param <T> type of the counters object
 * @param counters the object to stringify
 * @return the string in the following format
 * {(groupName)(group-displayName)[(counterName)(displayName)(value)]*}*
 */
public static <C extends Counter, G extends CounterGroupBase<C>,
               T extends AbstractCounters<C, G>>
String toEscapedCompactString(T counters) {
  StringBuilder builder = new StringBuilder();
  synchronized(counters) {
    for (G group : counters) {
      builder.append(toEscapedCompactString(group));
    }
  }
  return builder.toString();
}
 

import org.apache.hadoop.mapreduce.counters.AbstractCounters; //导入依赖的package包/类
/** {@inheritDoc} */
@Override public synchronized void incrAllCounters(AbstractCounters<Counter, CounterGroup> other) {
    for (CounterGroup group : other) {
        for (Counter counter : group) {
            findCounter(group.getName(), counter.getName()).increment(counter.getValue());
        }
    }
}
 

import org.apache.hadoop.mapreduce.counters.AbstractCounters; //导入依赖的package包/类
/**
 * Parse a pre 0.21 counters string into a counter object.
 * @param <C> type of the counter
 * @param <G> type of the counter group
 * @param <T> type of the counters object
 * @param compactString to parse
 * @param counters an empty counters object to hold the result
 * @return the counters object holding the result
 * @throws ParseException
 */
@SuppressWarnings("deprecation")
public static <C extends Counter, G extends CounterGroupBase<C>,
               T extends AbstractCounters<C, G>>
T parseEscapedCompactString(String compactString, T counters)
    throws ParseException {
  IntWritable index = new IntWritable(0);

  // Get the group to work on
  String groupString =
    getBlock(compactString, GROUP_OPEN, GROUP_CLOSE, index);

  while (groupString != null) {
    IntWritable groupIndex = new IntWritable(0);

    // Get the actual name
    String groupName =
        StringInterner.weakIntern(getBlock(groupString, UNIT_OPEN, UNIT_CLOSE, groupIndex));
    groupName = StringInterner.weakIntern(unescape(groupName));

    // Get the display name
    String groupDisplayName =
        StringInterner.weakIntern(getBlock(groupString, UNIT_OPEN, UNIT_CLOSE, groupIndex));
    groupDisplayName = StringInterner.weakIntern(unescape(groupDisplayName));

    // Get the counters
    G group = counters.getGroup(groupName);
    group.setDisplayName(groupDisplayName);

    String counterString =
      getBlock(groupString, COUNTER_OPEN, COUNTER_CLOSE, groupIndex);

    while (counterString != null) {
      IntWritable counterIndex = new IntWritable(0);

      // Get the actual name
      String counterName =
          StringInterner.weakIntern(getBlock(counterString, UNIT_OPEN, UNIT_CLOSE, counterIndex));
      counterName = StringInterner.weakIntern(unescape(counterName));

      // Get the display name
      String counterDisplayName =
          StringInterner.weakIntern(getBlock(counterString, UNIT_OPEN, UNIT_CLOSE, counterIndex));
      counterDisplayName = StringInterner.weakIntern(unescape(counterDisplayName));

      // Get the value
      long value =
        Long.parseLong(getBlock(counterString, UNIT_OPEN, UNIT_CLOSE,
                                counterIndex));

      // Add the counter
      Counter counter = group.findCounter(counterName);
      counter.setDisplayName(counterDisplayName);
      counter.increment(value);

      // Get the next counter
      counterString =
        getBlock(groupString, COUNTER_OPEN, COUNTER_CLOSE, groupIndex);
    }

    groupString = getBlock(compactString, GROUP_OPEN, GROUP_CLOSE, index);
  }
  return counters;
}
 

import org.apache.hadoop.mapreduce.counters.AbstractCounters; //导入依赖的package包/类
/**
 * Parse a pre 0.21 counters string into a counter object.
 * @param <C> type of the counter
 * @param <G> type of the counter group
 * @param <T> type of the counters object
 * @param compactString to parse
 * @param counters an empty counters object to hold the result
 * @return the counters object holding the result
 * @throws ParseException
 */
@SuppressWarnings("deprecation")
public static <C extends Counter, G extends CounterGroupBase<C>,
               T extends AbstractCounters<C, G>>
T parseEscapedCompactString(String compactString, T counters)
    throws ParseException {
  IntWritable index = new IntWritable(0);

  // Get the group to work on
  String groupString =
    getBlock(compactString, GROUP_OPEN, GROUP_CLOSE, index);

  while (groupString != null) {
    IntWritable groupIndex = new IntWritable(0);

    // Get the actual name
    String groupName =
      getBlock(groupString, UNIT_OPEN, UNIT_CLOSE, groupIndex);
    groupName = unescape(groupName);

    // Get the display name
    String groupDisplayName =
      getBlock(groupString, UNIT_OPEN, UNIT_CLOSE, groupIndex);
    groupDisplayName = unescape(groupDisplayName);

    // Get the counters
    G group = counters.getGroup(groupName);
    group.setDisplayName(groupDisplayName);

    String counterString =
      getBlock(groupString, COUNTER_OPEN, COUNTER_CLOSE, groupIndex);

    while (counterString != null) {
      IntWritable counterIndex = new IntWritable(0);

      // Get the actual name
      String counterName =
        getBlock(counterString, UNIT_OPEN, UNIT_CLOSE, counterIndex);
      counterName = unescape(counterName);

      // Get the display name
      String counterDisplayName =
        getBlock(counterString, UNIT_OPEN, UNIT_CLOSE, counterIndex);
      counterDisplayName = unescape(counterDisplayName);

      // Get the value
      long value =
        Long.parseLong(getBlock(counterString, UNIT_OPEN, UNIT_CLOSE,
                                counterIndex));

      // Add the counter
      Counter counter = group.findCounter(counterName);
      counter.setDisplayName(counterDisplayName);
      counter.increment(value);

      // Get the next counter
      counterString =
        getBlock(groupString, COUNTER_OPEN, COUNTER_CLOSE, groupIndex);
    }

    groupString = getBlock(compactString, GROUP_OPEN, GROUP_CLOSE, index);
  }
  return counters;
}
 

import org.apache.hadoop.mapreduce.counters.AbstractCounters; //导入依赖的package包/类
/**
 * Construct the Counters object from the another counters object
 * @param <C> the type of counter
 * @param <G> the type of counter group
 * @param counters the old counters object
 */
public <C extends Counter, G extends CounterGroupBase<C>>
Counters(AbstractCounters<C, G> counters) {
  super(counters, groupFactory);
}