Example usage for java.util.concurrent ConcurrentSkipListMap keySet

Introduction

In this page you can find the example usage for java.util.concurrent ConcurrentSkipListMap keySet.

Prototype

KeySet keySet

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Document

Lazily initialized key set

Usage

From source file:com.doctor.other.concurrent_hash_map_based_table.ConcurrentHashMapBasedTable.java

/**
 * ?/*from  ww w . j  a  v a2 s.  c  o m*/
 */
public void clear() {
    for (String rowKey : table.keySet()) {
        ConcurrentHashMap<String, ConcurrentSkipListMap<String, ConcurrentSet<T>>> rowMap = table.get(rowKey);
        for (String columnKey : rowMap.keySet()) {
            ConcurrentSkipListMap<String, ConcurrentSet<T>> columnMap = rowMap.get(columnKey);

            Iterator<String> iterator = columnMap.keySet().iterator();
            while (iterator.hasNext()) {
                String timesplices = iterator.next();
                columnMap.get(timesplices).clear();
                iterator.remove();
            }

        }
        rowMap.clear();
    }

    table.clear();
}

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From source file:com.doctor.other.concurrent_hash_map_based_table.ConcurrentHashMapBasedTable.java

private void pruneCache() {
    String expireTime = LocalDateTime.now().minusHours(ttl).format(Util.timeFormatter);
    log.info("{expireTime:{}}", expireTime);

    for (String rowKey : table.keySet()) {
        ConcurrentHashMap<String, ConcurrentSkipListMap<String, ConcurrentSet<T>>> rowMap = table.get(rowKey);
        for (String columnKey : rowMap.keySet()) {
            ConcurrentSkipListMap<String, ConcurrentSet<T>> columnMap = rowMap.get(columnKey);

            Iterator<String> iterator = columnMap.keySet().iterator();
            while (iterator.hasNext()) {
                String timesplices = iterator.next();
                if (timesplices.compareTo(expireTime) < 0) {
                    columnMap.get(timesplices).clear();
                    iterator.remove();//from   w  w w  . ja v  a  2s.  com
                } else {
                    break;
                }
            }
        }
    }

}

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