Package org.eclipse.jgit.internal.storage.dfs

Class DfsRefUpdate

java.lang.Object

org.eclipse.jgit.lib.RefUpdate

org.eclipse.jgit.internal.storage.dfs.DfsRefUpdate

final class DfsRefUpdate
extends RefUpdate

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.jgit.lib.RefUpdate

RefUpdate.Result

Field Summary

Fields

Modifier and Type	Field	Description
private Ref	dstRef
private DfsRefDatabase	refdb
private RevWalk	rw

Constructor Summary

Constructors

Constructor	Description
DfsRefUpdate(DfsRefDatabase refdb, Ref ref)

Method Summary

Modifier and Type	Method	Description
protected RefUpdate.Result	doDelete(RefUpdate.Result desiredResult)	Do delete
protected RefUpdate.Result	doLink(java.lang.String target)	Do link
protected RefUpdate.Result	doUpdate(RefUpdate.Result desiredResult)	Do update
protected DfsRefDatabase	getRefDatabase()	Get the reference database this update modifies.
protected DfsRepository	getRepository()	Get the repository storing the database's objects.
protected boolean	tryLock(boolean deref)	Try to acquire the lock on the reference.
protected void	unlock()	Releases the lock taken by RefUpdate.tryLock(boolean) if it succeeded.
RefUpdate.Result	update(RevWalk walk)	Gracefully update the ref to the new value.

Methods inherited from class org.eclipse.jgit.lib.RefUpdate

delete, delete, disableRefLog, forceUpdate, getExpectedOldObjectId, getName, getNewObjectId, getOldObjectId, getPushCertificate, getRef, getRefLogIdent, getRefLogMessage, getResult, isDetachingSymbolicRef, isForceRefLog, isForceUpdate, isRefLogIncludingResult, link, setCheckConflicting, setDetachingSymbolicRef, setExpectedOldObjectId, setForceRefLog, setForceUpdate, setNewObjectId, setOldObjectId, setPushCertificate, setRefLogIdent, setRefLogMessage, update

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

refdb

private final DfsRefDatabase refdb

dstRef

private Ref dstRef

rw

private RevWalk rw

Constructor Detail

DfsRefUpdate

DfsRefUpdate(DfsRefDatabase refdb,
             Ref ref)

Method Detail

getRefDatabase

protected DfsRefDatabase getRefDatabase()

Get the reference database this update modifies.

Specified by:

getRefDatabase in class RefUpdate

Returns:

the reference database this update modifies.

getRepository

protected DfsRepository getRepository()

Get the repository storing the database's objects.

Specified by:

getRepository in class RefUpdate

Returns:

the repository storing the database's objects.

tryLock

protected boolean tryLock(boolean deref)
                   throws java.io.IOException

Try to acquire the lock on the reference.

If the locking was successful the implementor must set the current identity value by calling RefUpdate.setOldObjectId(ObjectId).

Specified by:

tryLock in class RefUpdate

Parameters:

deref - true if the lock should be taken against the leaf level reference; false if it should be taken exactly against the current reference.

Returns:

true if the lock was acquired and the reference is likely protected from concurrent modification; false if it failed.

Throws:

java.io.IOException - the lock couldn't be taken due to an unexpected storage failure, and not because of a concurrent update.

unlock

protected void unlock()

Releases the lock taken by RefUpdate.tryLock(boolean) if it succeeded.

Specified by:

unlock in class RefUpdate

update

public RefUpdate.Result update(RevWalk walk)
                        throws java.io.IOException

Gracefully update the ref to the new value.

Merge test will be performed according to RefUpdate.isForceUpdate().

Overrides:

update in class RefUpdate

Parameters:

walk - a RevWalk instance this update command can borrow to perform the merge test. The walk will be reset to perform the test.

Returns:

the result status of the update.

Throws:

java.io.IOException - an unexpected IO error occurred while writing changes.

doUpdate

protected RefUpdate.Result doUpdate(RefUpdate.Result desiredResult)
                             throws java.io.IOException

Do update

Specified by:

doUpdate in class RefUpdate

Parameters:

desiredResult - a RefUpdate.Result object.

Returns:

result

Throws:

java.io.IOException

doDelete

protected RefUpdate.Result doDelete(RefUpdate.Result desiredResult)
                             throws java.io.IOException

Do delete

Specified by:

doDelete in class RefUpdate

Parameters:

desiredResult - a RefUpdate.Result object.

Returns:

result

Throws:

java.io.IOException

doLink

protected RefUpdate.Result doLink(java.lang.String target)
                           throws java.io.IOException

Do link

Specified by:

doLink in class RefUpdate

Parameters:

target - a String object.

Returns:

RefUpdate.Result.NEW on success.

Throws:

java.io.IOException