content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  package org.apache.asterix.transaction.management.service.locking;
  
  import java.util.concurrent.atomic.AtomicLong;
  
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.Logger;
  
  final class LockManagerStats {
      private final int loggingPeriod;
  
      private final AtomicLong lCnt = new AtomicLong();
      private final AtomicLong ilCnt = new AtomicLong();
      private final AtomicLong tlCnt = new AtomicLong();
      private final AtomicLong itlCnt = new AtomicLong();
      private final AtomicLong ulCnt = new AtomicLong();
      private final AtomicLong rlCnt = new AtomicLong();
  
      LockManagerStats(int loggingPeriod) {
          this.loggingPeriod = loggingPeriod;
      }
  
      final void lock() {
          lCnt.incrementAndGet();
      }
  
      final void instantLock() {
          ilCnt.incrementAndGet();
      }
  
      final void tryLock() {
          tlCnt.incrementAndGet();
      }
  
      final void instantTryLock() {
          itlCnt.incrementAndGet();
      }
  
      final void unlock() {
          ulCnt.incrementAndGet();
      }
  
      final void releaseLocks() {
          rlCnt.incrementAndGet();
      }
  
      final int requestSum() {
          return lCnt.intValue() + ilCnt.intValue() + tlCnt.intValue() + itlCnt.intValue() + ulCnt.intValue()
                  + rlCnt.intValue();
      }
  
      final StringBuilder append(StringBuilder sb) {
          sb.append("{").append(" lock : ").append(lCnt).append(", instantLock : ").append(ilCnt).append(", tryLock : ")
                  .append(tlCnt).append(", instantTryLock : ").append(itlCnt).append(", unlock : ").append(ulCnt)
                  .append(", releaseLocks : ").append(rlCnt).append(" }");
          return sb;
      }
  
      @Override
      public String toString() {
          return append(new StringBuilder()).toString();
      }
  
      final void logCounters(final Logger logger, final Level lvl, boolean always) {
          if (logger.isEnabled(lvl) && (always || requestSum() % loggingPeriod == 0)) {
              logger.log(lvl, toString());
          }
      }
  }
  