Class RefUpdate
- Direct Known Subclasses:
DfsRefUpdate
,FileReftableDatabase.FileReftableRefUpdate
,RefDirectoryUpdate
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic enum
Status of an update request.private static class
Handle the abstraction of storing a ref update. -
Field Summary
FieldsModifier and TypeFieldDescriptionprivate boolean
private boolean
Is this RefUpdate detaching a symbolic ref? We need this info since this.ref will normally be peeled of in case of detaching a symbolic ref (HEAD for example).private ObjectId
If non-null, the valueoldValue
must have to continue.private boolean
Does this specification ask for forced updated (rewind/reset)?private boolean
Should reflogs be written even if the configured default for this ref is not to write it.private ObjectId
New value the caller wants this ref to have.private ObjectId
Old value of the ref, obtained after we lock it.private PushCertificate
Push certificate associated with this update.private final Ref
private PersonIdent
Identity to record action as within the reflog.private boolean
Should the Result value be appended torefLogMessage
.private String
Message the caller wants included in the reflog.private RefUpdate.Result
Result of the update operation. -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiondelete()
Delete the ref.Delete the ref.void
Don't record this update in the ref's associated reflog.protected abstract RefUpdate.Result
doDelete
(RefUpdate.Result desiredResult) Do deleteprotected abstract RefUpdate.Result
Do linkprotected abstract RefUpdate.Result
doUpdate
(RefUpdate.Result desiredResult) Do updateForce the ref to take the new value.Get the expected value of the ref after the lock is taken, but before update occurs.getName()
Get the name of the ref this update will operate on.Get the new value the ref will be (or was) updated to.The old value of the ref, prior to the update being attempted.protected PushCertificate
Set the push certificate associated with this update.getRef()
Get the reference this update will create or modify.protected abstract RefDatabase
Get the reference database this update modifies.Get identity of the user making the change in the reflog.Get the message to include in the reflog.protected abstract Repository
Get the repository storing the database's objects.Get the status of this update.boolean
Return whether this update is actually detaching a symbolic ref.protected boolean
Check whether the reflog should be written regardless of repo defaults.boolean
Check if this update wants to forcefully change the ref.protected boolean
Whether the ref log message should show the result.Replace this reference with a symbolic reference to another reference.private void
private static RevObject
safeParseNew
(RevWalk rw, AnyObjectId newId) private static RevObject
safeParseOld
(RevWalk rw, AnyObjectId oldId) void
setCheckConflicting
(boolean check) Enable/disable the check for conflicting ref names.void
Tells this RefUpdate that it is actually detaching a symbolic ref.void
Set the expected value of the ref after the lock is taken, but before update occurs.void
setForceRefLog
(boolean force) Force writing a reflog for the updated ref.void
setForceUpdate
(boolean b) Set if this update wants to forcefully change the ref.void
Set the new value the ref will update to.protected void
setOldObjectId
(ObjectId old) Set the old value of the ref.void
Set a push certificate associated with this update.void
Set the identity of the user appearing in the reflog.void
setRefLogMessage
(String msg, boolean appendStatus) Set the message to include in the reflog.protected abstract boolean
tryLock
(boolean deref) Try to acquire the lock on the reference.protected abstract void
unlock()
Releases the lock taken bytryLock(boolean)
if it succeeded.update()
Gracefully update the ref to the new value.Gracefully update the ref to the new value.private RefUpdate.Result
updateImpl
(RevWalk walk, RefUpdate.Store store)
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Field Details
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newValue
New value the caller wants this ref to have. -
force
private boolean forceDoes this specification ask for forced updated (rewind/reset)? -
refLogIdent
Identity to record action as within the reflog. -
refLogMessage
Message the caller wants included in the reflog. -
refLogIncludeResult
private boolean refLogIncludeResultShould the Result value be appended torefLogMessage
. -
forceRefLog
private boolean forceRefLogShould reflogs be written even if the configured default for this ref is not to write it. -
oldValue
Old value of the ref, obtained after we lock it. -
expValue
If non-null, the valueoldValue
must have to continue. -
result
Result of the update operation. -
pushCert
Push certificate associated with this update. -
ref
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detachingSymbolicRef
private boolean detachingSymbolicRefIs this RefUpdate detaching a symbolic ref? We need this info since this.ref will normally be peeled of in case of detaching a symbolic ref (HEAD for example). Without this flag we cannot decide whether the ref has to be updated or not in case when it was a symbolic ref and the newValue == oldValue. -
checkConflicting
private boolean checkConflicting
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Constructor Details
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RefUpdate
Construct a new update operation for the reference.ref.getObjectId()
will be used to seedgetOldObjectId()
, which callers can use as part of their own update logic.- Parameters:
ref
- the reference that will be updated by this operation.
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Method Details
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getRefDatabase
Get the reference database this update modifies.- Returns:
- the reference database this update modifies.
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getRepository
Get the repository storing the database's objects.- Returns:
- the repository storing the database's objects.
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tryLock
Try to acquire the lock on the reference.If the locking was successful the implementor must set the current identity value by calling
setOldObjectId(ObjectId)
.- 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:
IOException
- the lock couldn't be taken due to an unexpected storage failure, and not because of a concurrent update.
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unlock
protected abstract void unlock()Releases the lock taken bytryLock(boolean)
if it succeeded. -
doUpdate
Do update- Parameters:
desiredResult
- aRefUpdate.Result
object.- Returns:
result
- Throws:
IOException
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doDelete
Do delete- Parameters:
desiredResult
- aRefUpdate.Result
object.- Returns:
result
- Throws:
IOException
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doLink
Do link- Parameters:
target
- aString
object.- Returns:
RefUpdate.Result.NEW
on success.- Throws:
IOException
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getName
Get the name of the ref this update will operate on.- Returns:
- name of underlying ref.
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getRef
Get the reference this update will create or modify.- Returns:
- the reference this update will create or modify.
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getNewObjectId
Get the new value the ref will be (or was) updated to.- Returns:
- new value. Null if the caller has not configured it.
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setDetachingSymbolicRef
public void setDetachingSymbolicRef()Tells this RefUpdate that it is actually detaching a symbolic ref. -
isDetachingSymbolicRef
public boolean isDetachingSymbolicRef()Return whether this update is actually detaching a symbolic ref.- Returns:
- true if detaching a symref.
- Since:
- 4.9
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setNewObjectId
Set the new value the ref will update to.- Parameters:
id
- the new value.
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getExpectedOldObjectId
Get the expected value of the ref after the lock is taken, but before update occurs.- Returns:
- the expected value of the ref after the lock is taken, but before
update occurs. Null to avoid the compare and swap test. Use
ObjectId.zeroId()
to indicate expectation of a non-existant ref.
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setExpectedOldObjectId
Set the expected value of the ref after the lock is taken, but before update occurs.- Parameters:
id
- the expected value of the ref after the lock is taken, but before update occurs. Null to avoid the compare and swap test. UseObjectId.zeroId()
to indicate expectation of a non-existant ref.
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isForceUpdate
public boolean isForceUpdate()Check if this update wants to forcefully change the ref.- Returns:
- true if this update should ignore merge tests.
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setForceUpdate
public void setForceUpdate(boolean b) Set if this update wants to forcefully change the ref.- Parameters:
b
- true if this update should ignore merge tests.
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getRefLogIdent
Get identity of the user making the change in the reflog.- Returns:
- identity of the user making the change in the reflog.
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setRefLogIdent
Set the identity of the user appearing in the reflog.The timestamp portion of the identity is ignored. A new identity with the current timestamp will be created automatically when the update occurs and the log record is written.
- Parameters:
pi
- identity of the user. If null the identity will be automatically determined based on the repository configuration.
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getRefLogMessage
Get the message to include in the reflog.- Returns:
- message the caller wants to include in the reflog; null if the update should not be logged.
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isRefLogIncludingResult
protected boolean isRefLogIncludingResult()Whether the ref log message should show the result.- Returns:
true
if the ref log message should show the result.
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setRefLogMessage
Set the message to include in the reflog.Repository implementations may limit which reflogs are written by default, based on the project configuration. If a repo is not configured to write logs for this ref by default, setting the message alone may have no effect. To indicate that the repo should write logs for this update in spite of configured defaults, use
setForceRefLog(boolean)
.- Parameters:
msg
- the message to describe this change. It may be null if appendStatus is null in order not to append to the reflogappendStatus
- true if the status of the ref change (fast-forward or forced-update) should be appended to the user supplied message.
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disableRefLog
public void disableRefLog()Don't record this update in the ref's associated reflog. -
setForceRefLog
public void setForceRefLog(boolean force) Force writing a reflog for the updated ref.- Parameters:
force
- whether to force.- Since:
- 4.9
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isForceRefLog
protected boolean isForceRefLog()Check whether the reflog should be written regardless of repo defaults.- Returns:
- whether force writing is enabled.
- Since:
- 4.9
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getOldObjectId
The old value of the ref, prior to the update being attempted.This value may differ before and after the update method. Initially it is populated with the value of the ref before the lock is taken, but the old value may change if someone else modified the ref between the time we last read it and when the ref was locked for update.
- Returns:
- the value of the ref prior to the update being attempted; null if the updated has not been attempted yet.
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setOldObjectId
Set the old value of the ref.- Parameters:
old
- the old value.
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setPushCertificate
Set a push certificate associated with this update.This usually includes a command to update this ref, but is not required to.
- Parameters:
cert
- push certificate, may be null.- Since:
- 4.1
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getPushCertificate
Set the push certificate associated with this update.This usually includes a command to update this ref, but is not required to.
- Returns:
- push certificate, may be null.
- Since:
- 4.1
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getResult
Get the status of this update.The same value that was previously returned from an update method.
- Returns:
- the status of the update.
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requireCanDoUpdate
private void requireCanDoUpdate() -
forceUpdate
Force the ref to take the new value.This is just a convenient helper for setting the force flag, and as such the merge test is performed.
- Returns:
- the result status of the update.
- Throws:
IOException
- an unexpected IO error occurred while writing changes.
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update
Gracefully update the ref to the new value.Merge test will be performed according to
isForceUpdate()
.This is the same as:
return update(new RevWalk(getRepository()));
- Returns:
- the result status of the update.
- Throws:
IOException
- an unexpected IO error occurred while writing changes.
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update
Gracefully update the ref to the new value.Merge test will be performed according to
isForceUpdate()
.- 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:
IOException
- an unexpected IO error occurred while writing changes.
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delete
Delete the ref.This is the same as:
return delete(new RevWalk(getRepository()));
- Returns:
- the result status of the delete.
- Throws:
IOException
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delete
Delete the ref.- Parameters:
walk
- a RevWalk instance this delete command can borrow to perform the merge test. The walk will be reset to perform the test.- Returns:
- the result status of the delete.
- Throws:
IOException
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link
Replace this reference with a symbolic reference to another reference.This exact reference (not its traversed leaf) is replaced with a symbolic reference to the requested name.
- Parameters:
target
- name of the new target for this reference. The new target name must be absolute, so it must begin withrefs/
.- Returns:
RefUpdate.Result.NEW
orRefUpdate.Result.FORCED
on success.- Throws:
IOException
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updateImpl
- Throws:
IOException
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setCheckConflicting
public void setCheckConflicting(boolean check) Enable/disable the check for conflicting ref names. By default conflicts are checked explicitly.- Parameters:
check
- whether to enable the check for conflicting ref names.- Since:
- 3.0
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safeParseNew
- Throws:
IOException
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safeParseOld
- Throws:
IOException
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