001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.utils;
014
015import java.util.concurrent.atomic.*;
016
017/**
018 * Represents an entry in {@link StackTraceDatabase}.
019 */
020public class StackTraceInfo {
021   AtomicInteger count;
022   long timeout;
023   String hash;
024
025   StackTraceInfo(long timeout, int hash) {
026      this.count = new AtomicInteger(1);
027      this.timeout = System.currentTimeMillis() + timeout;
028      this.hash = Integer.toHexString(hash);
029   }
030
031   private StackTraceInfo(int count, long timeout, String hash) {
032      this.count = new AtomicInteger(count);
033      this.timeout = timeout;
034      this.hash = hash;
035   }
036
037   @Override
038   public StackTraceInfo clone() {
039      return new StackTraceInfo(count.intValue(), timeout, hash);
040   }
041
042   /**
043    * Returns the number of times this stack trace was encountered.
044    *
045    * @return The number of times this stack trace was encountered.
046    */
047   public int getCount() {
048      return count.intValue();
049   }
050
051   /**
052    * Returns an 8-byte hash of the stack trace.
053    *
054    * @return An 8-byte hash of the stack trace.
055    */
056   public String getHash() {
057      return hash;
058   }
059
060   StackTraceInfo incrementAndClone() {
061      return new StackTraceInfo(count.incrementAndGet(), timeout, hash);
062   }
063}