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Merged HEAD-BUG-FIX (5.1/Cloud) to HEAD (5.1/Cloud)

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93938: Merged BRANCHES/DEV/mward/post50_hbf_fixes to BRANCHES/DEV/HEAD-BUG-FIX:
      93561: Cache stats: Fixed concurrency issue with 'get' count. Added method to retrieve stats snapshot.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@95014 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Alan Davis
2015-01-31 15:26:15 +00:00
parent b6e2f3309f
commit 151537105d
5 changed files with 207 additions and 32 deletions
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70
source/java/org/alfresco/repo/cache/OperationStats.java vendored Normal file
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/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.repo.cache;
/**
* Represents a single cache operation type's statistics.
* For example, the cummalative time spent performing a cache's remove operation
* and the number of times that the remove was performed.
* <p>
* Instances are immutable.
*/
public final class OperationStats
{
/** Total time spent in operations of this type */
private final double totalTime;
/** Count of how many instances of this operation occurred. */
private final long count;
public OperationStats(double totalTime, long count)
{
this.totalTime = totalTime;
this.count = count;
}
public OperationStats(OperationStats source, double totalTime, long count)
{
if (Double.compare(source.totalTime, Double.NaN) == 0)
{
// No previous time to add new time to.
this.totalTime = totalTime;
}
else
{
this.totalTime = source.totalTime + totalTime;
}
this.count = source.count + count;
}
public double meanTime()
{
return totalTime / count;
}
public double getTotalTime()
{
return this.totalTime;
}
public long getCount()
{
return this.count;
}
}