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Merge "Fix MissingObjectException race in ObjectDirectory"

stable-3.3
Shawn Pearce 11 years ago committed by Gerrit Code Review @ Eclipse.org
parent
5404e70dc6 d1aacc415a
commit
8ae6295007
5 changed files with 290 additions and 394 deletions
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  1. 106
      org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/CachedObjectDirectory.java
  2. 219
      org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileObjectDatabase.java
  3. 6
      org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java
  4. 2
      org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/LargePackedDeltaObject.java
  5. 293
      org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/ObjectDirectory.java

106
org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/CachedObjectDirectory.java
Unescape View File

@ -72,11 +72,11 @@ class CachedObjectDirectory extends FileObjectDatabase {
* The set that contains unpacked objects identifiers, it is created when
* the cached instance is created.
*/
private final ObjectIdOwnerMap<UnpackedObjectId> unpackedObjects = new ObjectIdOwnerMap<UnpackedObjectId>();
private ObjectIdOwnerMap<UnpackedObjectId> unpackedObjects;
private final ObjectDirectory wrapped;
private AlternateHandle[] alts;
private CachedObjectDirectory[] alts;
/**
* The constructor
@ -86,11 +86,15 @@ class CachedObjectDirectory extends FileObjectDatabase {
*/
CachedObjectDirectory(ObjectDirectory wrapped) {
this.wrapped = wrapped;
this.unpackedObjects = scanLoose();
}
private ObjectIdOwnerMap<UnpackedObjectId> scanLoose() {
ObjectIdOwnerMap<UnpackedObjectId> m = new ObjectIdOwnerMap<UnpackedObjectId>();
File objects = wrapped.getDirectory();
String[] fanout = objects.list();
if (fanout == null)
fanout = new String[0];
return m;
for (String d : fanout) {
if (d.length() != 2)
continue;
@ -102,12 +106,13 @@ class CachedObjectDirectory extends FileObjectDatabase {
continue;
try {
ObjectId id = ObjectId.fromString(d + e);
unpackedObjects.add(new UnpackedObjectId(id));
m.add(new UnpackedObjectId(id));
} catch (IllegalArgumentException notAnObject) {
// ignoring the file that does not represent loose object
}
}
}
return m;
}
@Override
@ -121,13 +126,13 @@ class CachedObjectDirectory extends FileObjectDatabase {
}
@Override
FileObjectDatabase newCachedFileObjectDatabase() {
return this;
File getDirectory() {
return wrapped.getDirectory();
}
@Override
File getDirectory() {
return wrapped.getDirectory();
File fileFor(AnyObjectId id) {
return wrapped.fileFor(id);
}
@Override
@ -145,15 +150,12 @@ class CachedObjectDirectory extends FileObjectDatabase {
return wrapped.getShallowCommits();
}
@Override
AlternateHandle[] myAlternates() {
private CachedObjectDirectory[] myAlternates() {
if (alts == null) {
AlternateHandle[] src = wrapped.myAlternates();
alts = new AlternateHandle[src.length];
for (int i = 0; i < alts.length; i++) {
FileObjectDatabase s = src[i].db;
alts[i] = new AlternateHandle(s.newCachedFileObjectDatabase());
}
ObjectDirectory.AlternateHandle[] src = wrapped.myAlternates();
alts = new CachedObjectDirectory[src.length];
for (int i = 0; i < alts.length; i++)
alts[i] = src[i].db.newCachedFileObjectDatabase();
}
return alts;
}
@ -170,61 +172,53 @@ class CachedObjectDirectory extends FileObjectDatabase {
}
@Override
boolean tryAgain1() {
return wrapped.tryAgain1();
public boolean has(final AnyObjectId objectId) throws IOException {
if (unpackedObjects.contains(objectId))
return true;
if (wrapped.hasPackedObject(objectId))
return true;
for (CachedObjectDirectory alt : myAlternates()) {
if (alt.has(objectId))
return true;
}
@Override
public boolean has(final AnyObjectId objectId) {
return hasObjectImpl1(objectId);
}
@Override
boolean hasObject1(AnyObjectId objectId) {
return unpackedObjects.contains(objectId)
|| wrapped.hasObject1(objectId);
return false;
}
@Override
ObjectLoader openObject(final WindowCursor curs,
final AnyObjectId objectId) throws IOException {
return openObjectImpl1(curs, objectId);
}
@Override
ObjectLoader openObject1(WindowCursor curs, AnyObjectId objectId)
throws IOException {
if (unpackedObjects.contains(objectId))
return wrapped.openObject2(curs, objectId.name(), objectId);
return wrapped.openObject1(curs, objectId);
ObjectLoader ldr = openLooseObject(curs, objectId);
if (ldr != null)
return ldr;
ldr = wrapped.openPackedObject(curs, objectId);
if (ldr != null)
return ldr;
for (CachedObjectDirectory alt : myAlternates()) {
ldr = alt.openObject(curs, objectId);
if (ldr != null)
return ldr;
}
@Override
boolean hasObject2(String objectId) {
return unpackedObjects.contains(ObjectId.fromString(objectId));
}
@Override
ObjectLoader openObject2(WindowCursor curs, String objectName,
AnyObjectId objectId) throws IOException {
if (unpackedObjects.contains(objectId))
return wrapped.openObject2(curs, objectName, objectId);
return null;
}
@Override
long getObjectSize1(WindowCursor curs, AnyObjectId objectId) throws IOException {
if (unpackedObjects.contains(objectId))
return wrapped.getObjectSize2(curs, objectId.name(), objectId);
return wrapped.getObjectSize1(curs, objectId);
long getObjectSize(WindowCursor curs, AnyObjectId objectId)
throws IOException {
// Object size is unlikely to be requested from contexts using
// this type. Don't bother trying to accelerate the lookup.
return wrapped.getObjectSize(curs, objectId);
}
@Override
long getObjectSize2(WindowCursor curs, String objectName, AnyObjectId objectId)
ObjectLoader openLooseObject(WindowCursor curs, AnyObjectId id)
throws IOException {
if (unpackedObjects.contains(objectId))
return wrapped.getObjectSize2(curs, objectName, objectId);
return -1;
if (unpackedObjects.contains(id)) {
ObjectLoader ldr = wrapped.openLooseObject(curs, id);
if (ldr != null)
return ldr;
unpackedObjects = scanLoose();
}
return null;
}
@Override

219
org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileObjectDatabase.java
Unescape View File

@ -74,61 +74,6 @@ abstract class FileObjectDatabase extends ObjectDatabase {
return new ObjectDirectoryInserter(this, getConfig());
}
/**
* Does the requested object exist in this database?
* <p>
* Alternates (if present) are searched automatically.
*
* @param objectId
* identity of the object to test for existence of.
* @return true if the specified object is stored in this database, or any
* of the alternate databases.
*/
public boolean has(final AnyObjectId objectId) {
return hasObjectImpl1(objectId) || hasObjectImpl2(objectId.name());
}
/**
* Compute the location of a loose object file.
*
* @param objectId
* identity of the loose object to map to the directory.
* @return location of the object, if it were to exist as a loose object.
*/
File fileFor(final AnyObjectId objectId) {
return fileFor(objectId.name());
}
File fileFor(final String objectName) {
final String d = objectName.substring(0, 2);
final String f = objectName.substring(2);
return new File(new File(getDirectory(), d), f);
}
final boolean hasObjectImpl1(final AnyObjectId objectId) {
if (hasObject1(objectId))
return true;
for (final AlternateHandle alt : myAlternates()) {
if (alt.db.hasObjectImpl1(objectId))
return true;
}
return tryAgain1() && hasObject1(objectId);
}
final boolean hasObjectImpl2(final String objectId) {
if (hasObject2(objectId))
return true;
for (final AlternateHandle alt : myAlternates()) {
if (alt.db.hasObjectImpl2(objectId))
return true;
}
return false;
}
abstract void resolve(Set<ObjectId> matches, AbbreviatedObjectId id)
throws IOException;
@ -138,180 +83,26 @@ abstract class FileObjectDatabase extends ObjectDatabase {
abstract Set<ObjectId> getShallowCommits() throws IOException;
/**
* Open an object from this database.
* <p>
* Alternates (if present) are searched automatically.
*
* @param curs
* temporary working space associated with the calling thread.
* @param objectId
* identity of the object to open.
* @return a {@link ObjectLoader} for accessing the data of the named
* object, or null if the object does not exist.
* @throws IOException
*/
ObjectLoader openObject(final WindowCursor curs, final AnyObjectId objectId)
throws IOException {
ObjectLoader ldr;
ldr = openObjectImpl1(curs, objectId);
if (ldr != null)
return ldr;
ldr = openObjectImpl2(curs, objectId.name(), objectId);
if (ldr != null)
return ldr;
return null;
}
final ObjectLoader openObjectImpl1(final WindowCursor curs,
final AnyObjectId objectId) throws IOException {
ObjectLoader ldr;
ldr = openObject1(curs, objectId);
if (ldr != null)
return ldr;
for (final AlternateHandle alt : myAlternates()) {
ldr = alt.db.openObjectImpl1(curs, objectId);
if (ldr != null)
return ldr;
}
if (tryAgain1()) {
ldr = openObject1(curs, objectId);
if (ldr != null)
return ldr;
}
return null;
}
final ObjectLoader openObjectImpl2(final WindowCursor curs,
final String objectName, final AnyObjectId objectId)
throws IOException {
ObjectLoader ldr;
ldr = openObject2(curs, objectName, objectId);
if (ldr != null)
return ldr;
for (final AlternateHandle alt : myAlternates()) {
ldr = alt.db.openObjectImpl2(curs, objectName, objectId);
if (ldr != null)
return ldr;
}
return null;
}
long getObjectSize(WindowCursor curs, AnyObjectId objectId)
throws IOException {
long sz = getObjectSizeImpl1(curs, objectId);
if (0 <= sz)
return sz;
return getObjectSizeImpl2(curs, objectId.name(), objectId);
}
final long getObjectSizeImpl1(final WindowCursor curs,
final AnyObjectId objectId) throws IOException {
long sz;
sz = getObjectSize1(curs, objectId);
if (0 <= sz)
return sz;
for (final AlternateHandle alt : myAlternates()) {
sz = alt.db.getObjectSizeImpl1(curs, objectId);
if (0 <= sz)
return sz;
}
if (tryAgain1()) {
sz = getObjectSize1(curs, objectId);
if (0 <= sz)
return sz;
}
return -1;
}
final long getObjectSizeImpl2(final WindowCursor curs,
final String objectName, final AnyObjectId objectId)
throws IOException {
long sz;
sz = getObjectSize2(curs, objectName, objectId);
if (0 <= sz)
return sz;
for (final AlternateHandle alt : myAlternates()) {
sz = alt.db.getObjectSizeImpl2(curs, objectName, objectId);
if (0 <= sz)
return sz;
}
return -1;
}
abstract void selectObjectRepresentation(PackWriter packer,
ObjectToPack otp, WindowCursor curs) throws IOException;
abstract File getDirectory();
abstract AlternateHandle[] myAlternates();
abstract File fileFor(AnyObjectId id);
abstract boolean tryAgain1();
abstract boolean hasObject1(AnyObjectId objectId);
abstract boolean hasObject2(String objectId);
abstract ObjectLoader openObject1(WindowCursor curs, AnyObjectId objectId)
abstract ObjectLoader openObject(WindowCursor curs, AnyObjectId objectId)
throws IOException;
abstract ObjectLoader openObject2(WindowCursor curs, String objectName,
AnyObjectId objectId) throws IOException;
abstract long getObjectSize1(WindowCursor curs, AnyObjectId objectId)
abstract long getObjectSize(WindowCursor curs, AnyObjectId objectId)
throws IOException;
abstract long getObjectSize2(WindowCursor curs, String objectName,
AnyObjectId objectId) throws IOException;
abstract ObjectLoader openLooseObject(WindowCursor curs, AnyObjectId id)
throws IOException;
abstract InsertLooseObjectResult insertUnpackedObject(File tmp,
ObjectId id, boolean createDuplicate) throws IOException;
abstract PackFile openPack(File pack) throws IOException;
abstract FileObjectDatabase newCachedFileObjectDatabase();
abstract Collection<PackFile> getPacks();
static class AlternateHandle {
final FileObjectDatabase db;
AlternateHandle(FileObjectDatabase db) {
this.db = db;
}
void close() {
db.close();
}
}
static class AlternateRepository extends AlternateHandle {
final FileRepository repository;
AlternateRepository(FileRepository r) {
super(r.getObjectDatabase());
repository = r;
}
void close() {
repository.close();
}
}
}

6
org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java
Unescape View File

@ -59,8 +59,8 @@ import org.eclipse.jgit.events.ConfigChangedEvent;
import org.eclipse.jgit.events.ConfigChangedListener;
import org.eclipse.jgit.events.IndexChangedEvent;
import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.internal.storage.file.FileObjectDatabase.AlternateHandle;
import org.eclipse.jgit.internal.storage.file.FileObjectDatabase.AlternateRepository;
import org.eclipse.jgit.internal.storage.file.ObjectDirectory.AlternateHandle;
import org.eclipse.jgit.internal.storage.file.ObjectDirectory.AlternateRepository;
import org.eclipse.jgit.lib.BaseRepositoryBuilder;
import org.eclipse.jgit.lib.ConfigConstants;
import org.eclipse.jgit.lib.Constants;
@ -368,7 +368,7 @@ public class FileRepository extends Repository {
*/
public Set<ObjectId> getAdditionalHaves() {
HashSet<ObjectId> r = new HashSet<ObjectId>();
for (AlternateHandle d : objectDatabase. myAlternates()) {
for (AlternateHandle d : objectDatabase.myAlternates()) {
if (d instanceof AlternateRepository) {
Repository repo;

2
org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/LargePackedDeltaObject.java
Unescape View File

@ -173,7 +173,7 @@ class LargePackedDeltaObject extends ObjectLoader {
//
final ObjectId myId = getObjectId();
final WindowCursor wc = new WindowCursor(db);
ObjectLoader ldr = db.openObject2(wc, myId.name(), myId);
ObjectLoader ldr = db.openLooseObject(wc, myId);
if (ldr != null)
return ldr.openStream();

293
org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/ObjectDirectory.java
Unescape View File

@ -200,31 +200,19 @@ public class ObjectDirectory extends FileObjectDatabase {
unpackedObjectCache.clear();
final PackList packs = packList.get();
packList.set(NO_PACKS);
for (final PackFile p : packs.packs)
if (packs != NO_PACKS && packList.compareAndSet(packs, NO_PACKS)) {
for (PackFile p : packs.packs)
p.close();
}
// Fully close all loaded alternates and clear the alternate list.
AlternateHandle[] alt = alternates.get();
if (alt != null) {
alternates.set(null);
if (alt != null && alternates.compareAndSet(alt, null)) {
for(final AlternateHandle od : alt)
od.close();
}
}
/**
* Compute the location of a loose object file.
*
* @param objectId
* identity of the loose object to map to the directory.
* @return location of the object, if it were to exist as a loose object.
*/
@Override
public File fileFor(final AnyObjectId objectId) {
return super.fileFor(objectId);
}
/**
* @return unmodifiable collection of all known pack files local to this
* directory. Most recent packs are presented first. Packs most
@ -277,37 +265,64 @@ public class ObjectDirectory extends FileObjectDatabase {
@Override
public String toString() {
return "ObjectDirectory[" + getDirectory() + "]"; //$NON-NLS-1$
return "ObjectDirectory[" + getDirectory() + "]"; //$NON-NLS-1$ //$NON-NLS-2$
}
boolean hasObject1(final AnyObjectId objectId) {
if (unpackedObjectCache.isUnpacked(objectId))
@Override
public boolean has(AnyObjectId objectId) {
return unpackedObjectCache.isUnpacked(objectId)
|| hasPackedInSelfOrAlternate(objectId)
|| hasLooseInSelfOrAlternate(objectId);
}
private boolean hasPackedInSelfOrAlternate(AnyObjectId objectId) {
if (hasPackedObject(objectId))
return true;
for (final PackFile p : packList.get().packs) {
try {
if (p.hasObject(objectId)) {
for (AlternateHandle alt : myAlternates()) {
if (alt.db.hasPackedInSelfOrAlternate(objectId))
return true;
}
return false;
}
private boolean hasLooseInSelfOrAlternate(AnyObjectId objectId) {
if (fileFor(objectId).exists())
return true;
for (AlternateHandle alt : myAlternates()) {
if (alt.db.hasLooseInSelfOrAlternate(objectId))
return true;
}
return false;
}
boolean hasPackedObject(AnyObjectId objectId) {
PackList pList;
do {
pList = packList.get();
for (PackFile p : pList.packs) {
try {
if (p.hasObject(objectId))
return true;
} catch (IOException e) {
// The hasObject call should have only touched the index,
// so any failure here indicates the index is unreadable
// by this process, and the pack is likewise not readable.
//
removePack(p);
continue;
}
}
} while (searchPacksAgain(pList));
return false;
}
@Override
void resolve(Set<ObjectId> matches, AbbreviatedObjectId id)
throws IOException {
// Go through the packs once. If we didn't find any resolutions
// scan for new packs and check once more.
//
int oldSize = matches.size();
PackList pList = packList.get();
for (;;) {
PackList pList;
do {
pList = packList.get();
for (PackFile p : pList.packs) {
try {
p.resolve(matches, id, RESOLVE_ABBREV_LIMIT);
@ -319,15 +334,7 @@ public class ObjectDirectory extends FileObjectDatabase {
if (matches.size() > RESOLVE_ABBREV_LIMIT)
return;
}
if (matches.size() == oldSize) {
PackList nList = scanPacks(pList);
if (nList == pList || nList.packs.length == 0)
break;
pList = nList;
continue;
}
break;
}
} while (matches.size() == oldSize && searchPacksAgain(pList));
String fanOut = id.name().substring(0, 2);
String[] entries = new File(getDirectory(), fanOut).list();
@ -354,74 +361,164 @@ public class ObjectDirectory extends FileObjectDatabase {
}
}
ObjectLoader openObject1(final WindowCursor curs,
final AnyObjectId objectId) throws IOException {
@Override
ObjectLoader openObject(WindowCursor curs, AnyObjectId objectId)
throws IOException {
if (unpackedObjectCache.isUnpacked(objectId)) {
ObjectLoader ldr = openObject2(curs, objectId.name(), objectId);
ObjectLoader ldr = openLooseObject(curs, objectId);
if (ldr != null)
return ldr;
else
unpackedObjectCache.remove(objectId);
}
ObjectLoader ldr = openPackedFromSelfOrAlternate(curs, objectId);
if (ldr != null)
return ldr;
return openLooseFromSelfOrAlternate(curs, objectId);
}
PackList pList = packList.get();
private ObjectLoader openPackedFromSelfOrAlternate(WindowCursor curs,
AnyObjectId objectId) {
ObjectLoader ldr = openPackedObject(curs, objectId);
if (ldr != null)
return ldr;
for (AlternateHandle alt : myAlternates()) {
ldr = alt.db.openPackedFromSelfOrAlternate(curs, objectId);
if (ldr != null)
return ldr;
}
return null;
}
private ObjectLoader openLooseFromSelfOrAlternate(WindowCursor curs,
AnyObjectId objectId) throws IOException {
ObjectLoader ldr = openLooseObject(curs, objectId);
if (ldr != null)
return ldr;
for (AlternateHandle alt : myAlternates()) {
ldr = alt.db.openLooseFromSelfOrAlternate(curs, objectId);
if (ldr != null)
return ldr;
}
return null;
}
ObjectLoader openPackedObject(WindowCursor curs, AnyObjectId objectId) {
PackList pList;
do {
SEARCH: for (;;) {
for (final PackFile p : pList.packs) {
pList = packList.get();
for (PackFile p : pList.packs) {
try {
final ObjectLoader ldr = p.get(curs, objectId);
ObjectLoader ldr = p.get(curs, objectId);
if (ldr != null)
return ldr;
} catch (PackMismatchException e) {
// Pack was modified; refresh the entire pack list.
//
pList = scanPacks(pList);
if (searchPacksAgain(pList))
continue SEARCH;
} catch (IOException e) {
// Assume the pack is corrupted.
//
removePack(p);
}
}
break SEARCH;
}
} while (searchPacksAgain(pList));
return null;
}
ObjectLoader openLooseObject(WindowCursor curs, AnyObjectId id)
throws IOException {
try {
File path = fileFor(id);
FileInputStream in = new FileInputStream(path);
try {
unpackedObjectCache.add(id);
return UnpackedObject.open(in, path, id, curs);
} finally {
in.close();
}
} catch (FileNotFoundException noFile) {
unpackedObjectCache.remove(id);
return null;
}
}
long getObjectSize1(final WindowCursor curs, final AnyObjectId objectId)
long getObjectSize(WindowCursor curs, AnyObjectId id)
throws IOException {
PackList pList = packList.get();
if (unpackedObjectCache.isUnpacked(id)) {
long len = getLooseObjectSize(curs, id);
if (0 <= len)
return len;
}
long len = getPackedSizeFromSelfOrAlternate(curs, id);
if (0 <= len)
return len;
return getLooseSizeFromSelfOrAlternate(curs, id);
}
private long getPackedSizeFromSelfOrAlternate(WindowCursor curs,
AnyObjectId id) {
long len = getPackedObjectSize(curs, id);
if (0 <= len)
return len;
for (AlternateHandle alt : myAlternates()) {
len = alt.db.getPackedSizeFromSelfOrAlternate(curs, id);
if (0 <= len)
return len;
}
return -1;
}
private long getLooseSizeFromSelfOrAlternate(WindowCursor curs,
AnyObjectId id) throws IOException {
long len = getLooseObjectSize(curs, id);
if (0 <= len)
return len;
for (AlternateHandle alt : myAlternates()) {
len = alt.db.getLooseSizeFromSelfOrAlternate(curs, id);
if (0 <= len)
return len;
}
return -1;
}
private long getPackedObjectSize(WindowCursor curs, AnyObjectId id) {
PackList pList;
do {
SEARCH: for (;;) {
for (final PackFile p : pList.packs) {
pList = packList.get();
for (PackFile p : pList.packs) {
try {
long sz = p.getObjectSize(curs, objectId);
if (0 <= sz)
return sz;
long len = p.getObjectSize(curs, id);
if (0 <= len)
return len;
} catch (PackMismatchException e) {
// Pack was modified; refresh the entire pack list.
//
pList = scanPacks(pList);
if (searchPacksAgain(pList))
continue SEARCH;
} catch (IOException e) {
// Assume the pack is corrupted.
//
removePack(p);
}
}
return -1;
break SEARCH;
}
} while (searchPacksAgain(pList));
return -1;
}
@Override
long getObjectSize2(WindowCursor curs, String objectName,
AnyObjectId objectId) throws IOException {
private long getLooseObjectSize(WindowCursor curs, AnyObjectId id)
throws IOException {
try {
File path = fileFor(objectName);
FileInputStream in = new FileInputStream(path);
FileInputStream in = new FileInputStream(fileFor(id));
try {
return UnpackedObject.getSize(in, objectId, curs);
unpackedObjectCache.add(id);
return UnpackedObject.getSize(in, id, curs);
} finally {
in.close();
}
} catch (FileNotFoundException noFile) {
unpackedObjectCache.remove(id);
return -1;
}
}
@ -454,28 +551,6 @@ public class ObjectDirectory extends FileObjectDatabase {
h.db.selectObjectRepresentation(packer, otp, curs);
}
boolean hasObject2(final String objectName) {
return fileFor(objectName).exists();
}
ObjectLoader openObject2(final WindowCursor curs,
final String objectName, final AnyObjectId objectId)
throws IOException {
try {
File path = fileFor(objectName);
FileInputStream in = new FileInputStream(path);
try {
unpackedObjectCache.add(objectId);
return UnpackedObject.open(in, path, objectId, curs);
} finally {
in.close();
}
} catch (FileNotFoundException noFile) {
unpackedObjectCache.remove(objectId);
return null;
}
}
@Override
InsertLooseObjectResult insertUnpackedObject(File tmp, ObjectId id,
boolean createDuplicate) throws IOException {
@ -530,11 +605,8 @@ public class ObjectDirectory extends FileObjectDatabase {
return InsertLooseObjectResult.FAILURE;
}
boolean tryAgain1() {
final PackList old = packList.get();
if (old.snapshot.isModified(packDirectory))
return old != scanPacks(old);
return false;
private boolean searchPacksAgain(PackList old) {
return old.snapshot.isModified(packDirectory) && old != scanPacks(old);
}
Config getConfig() {
@ -794,6 +866,20 @@ public class ObjectDirectory extends FileObjectDatabase {
return new AlternateHandle(db);
}
/**
* Compute the location of a loose object file.
*
* @param objectId
* identity of the loose object to map to the directory.
* @return location of the object, if it were to exist as a loose object.
*/
public File fileFor(AnyObjectId objectId) {
String n = objectId.name();
String d = n.substring(0, 2);
String f = n.substring(2);
return new File(new File(getDirectory(), d), f);
}
private static final class PackList {
/** State just before reading the pack directory. */
final FileSnapshot snapshot;
@ -807,12 +893,37 @@ public class ObjectDirectory extends FileObjectDatabase {
}
}
static class AlternateHandle {
final ObjectDirectory db;
AlternateHandle(ObjectDirectory db) {
this.db = db;
}
void close() {
db.close();
}
}
static class AlternateRepository extends AlternateHandle {
final FileRepository repository;
AlternateRepository(FileRepository r) {
super(r.getObjectDatabase());
repository = r;
}
void close() {
repository.close();
}
}
@Override
public ObjectDatabase newCachedDatabase() {
return newCachedFileObjectDatabase();
}
FileObjectDatabase newCachedFileObjectDatabase() {
CachedObjectDirectory newCachedFileObjectDatabase() {
return new CachedObjectDirectory(this);
}
}

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