motiejus
/
jgit
1
Fork 0
Code Releases Activity

Expose the list of pack files in the DfsBlockCache 

Callers may want to inspect the contents of the cache, which this allows
them to do in a read-only fashion without any locking.

Change-Id: Ifd78e8ce34e26e5cc33e9dd61d70c593ce479ee0
This commit is contained in:
Dave Borowitz 2011-11-03 12:52:19 -07:00 committed by Shawn O. Pearce
parent 35d72ac806
commit dff9d56b94
1 changed files with 19 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsBlockCache.java
View File

@ -46,9 +46,11 @@
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReferenceArray;
@ -156,6 +158,9 @@ public static DfsBlockCache getInstance() {
/** Cache of pack files, indexed by description. */
private final Map<DfsPackDescription, DfsPackFile> packCache;
/** View of pack files in the pack cache. */
private final Collection<DfsPackFile> packFiles;
/** Number of times a block was found in the cache. */
private final AtomicLong statHit;
@ -203,7 +208,9 @@ else if (eb < 4)
readAheadLimit = cfg.getReadAheadLimit();
readAheadService = cfg.getReadAheadService();
packCache = new HashMap<DfsPackDescription, DfsPackFile>();
packCache = new ConcurrentHashMap<DfsPackDescription, DfsPackFile>(
16, 0.75f, 1);
packFiles = Collections.unmodifiableCollection(packCache.values());
statHit = new AtomicLong();
statMiss = new AtomicLong();
@ -234,6 +241,16 @@ public long getEvictions() {
return statEvict;
}
/**
* Get the pack files stored in this cache.
*
* @return a collection of pack files, some of which may not actually be
* present; the caller should check the pack's cached size.
*/
public Collection<DfsPackFile> getPackFiles() {
return packFiles;
}
DfsPackFile getOrCreate(DfsPackDescription dsc, DfsPackKey key) {
// TODO This table grows without bound. It needs to clean up
// entries that aren't in cache anymore, and aren't being used