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https://issues.apache.org/jira/browse/JCS-60?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12723616#action_12723616
]
Aaron Smuts commented on JCS-60:
--------------------------------
I wrote a test to verify the bug. I fixed it.
/**
* Verify that the old slot gets in the recycle bin.
* <p>
* @throws IOException
*/
public void testProcessUpdate_SameKeyBiggerSize()
throws IOException
{
// SETUP
String cacheName = "testProcessUpdate_SameKeyBiggerSize";
IndexedDiskCacheAttributes cattr = new IndexedDiskCacheAttributes();
cattr.setCacheName( cacheName );
cattr.setMaxKeySize( 100 );
cattr.setDiskPath( "target/test-sandbox/IndexDiskCacheUnitTest" );
IndexedDiskCache diskCache = new IndexedDiskCache( cattr );
String key = "myKey";
String value = "myValue";
String value2 = "myValue2";
ICacheElement ce1 = new CacheElement( cacheName, key, value );
// DO WORK
diskCache.processUpdate( ce1 );
long fileSize1 = diskCache.getDataFileSize();
// DO WORK
ICacheElement ce2 = new CacheElement( cacheName, key, value2 );
diskCache.processUpdate( ce2 );
ICacheElement result = diskCache.processGet( key );
// VERIFY
assertNotNull( "Should have a result", result );
long fileSize2 = diskCache.getDataFileSize();
assertTrue( "File should be greater.", fileSize1 < fileSize2 );
int binSize = diskCache.getRecyleBinSize();
assertEquals( "Should be one in the bin.", 1, binSize );
}
> Disk cache grows unnecessarily
> ------------------------------
>
> Key: JCS-60
> URL: https://issues.apache.org/jira/browse/JCS-60
> Project: JCS
> Issue Type: Bug
> Components: Indexed Disk Cache
> Reporter: Alexander Sofronov
> Assignee: Aaron Smuts
>
> I'm using JCS cache in UPDATE mode and I found that disk cache may grow when
> adding the cache entries with the same key but larger value.
> For example,
> cache.put("key", "value");
> cache.put("key", "value1");
> cache.put("key", "value12");
> After that I see that *.data file contains all 3 entries. And the cache is
> not optimized at shutdown even when isShutdownOptimizationEnabled is set to
> true.
> I found a workaround for this - delete the key before writing.
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