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Diffstat (limited to 'src/de/lmu/ifi/dbs/elki/logging/statistics/AtomicLongCounter.java')
-rw-r--r-- | src/de/lmu/ifi/dbs/elki/logging/statistics/AtomicLongCounter.java | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/logging/statistics/AtomicLongCounter.java b/src/de/lmu/ifi/dbs/elki/logging/statistics/AtomicLongCounter.java new file mode 100644 index 00000000..e200d93e --- /dev/null +++ b/src/de/lmu/ifi/dbs/elki/logging/statistics/AtomicLongCounter.java @@ -0,0 +1,72 @@ +package de.lmu.ifi.dbs.elki.logging.statistics; + +/* + This file is part of ELKI: + Environment for Developing KDD-Applications Supported by Index-Structures + + Copyright (C) 2013 + Ludwig-Maximilians-Universität München + Lehr- und Forschungseinheit für Datenbanksysteme + ELKI Development Team + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +import java.util.concurrent.atomic.AtomicLong; + +/** + * Class to count events in a thread-safe counter. + * + * @author Erich Schubert + */ +public class AtomicLongCounter extends AbstractStatistic implements Counter { + /** + * The counter to use. + */ + AtomicLong counter = new AtomicLong(0); + + /** + * Constructor. + * + * @param key Key to report. + */ + public AtomicLongCounter(String key) { + super(key); + } + + @Override + public long increment() { + return counter.incrementAndGet(); + } + + @Override + public long decrement() { + return counter.decrementAndGet(); + } + + @Override + public long increment(long i) { + return counter.addAndGet(i); + } + + @Override + public long getValue() { + return counter.get(); + } + + @Override + public String formatValue() { + return Long.toString(getValue()); + } +} |