com.google.gerrit.server.git

Class VersionedMetaData

java.lang.Object

com.google.gerrit.server.git.VersionedMetaData

Direct Known Subclasses:

ProjectConfig, ProjectConfigSchemaUpdate, ProjectLevelConfig, VersionedAccountDestinations, VersionedAccountPreferences, VersionedAccountQueries, VersionedAuthorizedKeys, VersionedMetaDataOnInit, WatchConfig

public abstract class VersionedMetaData
extends Object

Support for metadata stored within a version controlled branch.

Implementors are responsible for supplying implementations of the onLoad and onSave methods to read from the repository, or format an update that can later be written back to the repository.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	VersionedMetaData.BatchMetaDataUpdate
static class	VersionedMetaData.PathInfo Path information that does not hold references to any repository data structures, allowing the application to retain this object for long periods of time.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.eclipse.jgit.lib.ObjectInserter	inserter
protected org.eclipse.jgit.dircache.DirCache	newTree
protected org.eclipse.jgit.lib.ObjectReader	reader
protected org.eclipse.jgit.revwalk.RevCommit	revision

Constructor Summary

Constructors

Constructor and Description
VersionedMetaData()

Method Summary

Modifier and Type	Method and Description
org.eclipse.jgit.revwalk.RevCommit	commit(MetaDataUpdate update) Update this metadata branch, recording a new commit on its reference.
org.eclipse.jgit.revwalk.RevCommit	commitToNewRef(MetaDataUpdate update, String refName) Creates a new commit and a new ref based on this commit.
protected org.eclipse.jgit.lib.ObjectId	getObjectId(String fileName)
List<VersionedMetaData.PathInfo>	getPathInfos(boolean recursive)
protected abstract String	getRefName()
org.eclipse.jgit.lib.ObjectId	getRevision()
void	load(MetaDataUpdate update)
void	load(MetaDataUpdate update, org.eclipse.jgit.lib.ObjectId id)
void	load(org.eclipse.jgit.lib.Repository db) Load the current version from the branch.
void	load(org.eclipse.jgit.lib.Repository db, org.eclipse.jgit.lib.ObjectId id) Load a specific version from the repository.
void	load(org.eclipse.jgit.revwalk.RevWalk walk, org.eclipse.jgit.lib.ObjectId id) Load a specific version from an open walk.
protected abstract void	onLoad() Set up the metadata, parsing any state from the loaded revision.
protected abstract boolean	onSave(org.eclipse.jgit.lib.CommitBuilder commit) Save any changes to the metadata in a commit.
VersionedMetaData.BatchMetaDataUpdate	openUpdate(MetaDataUpdate update) Open a batch of updates to the same metadata ref.
protected org.eclipse.jgit.lib.Config	readConfig(String fileName)
protected byte[]	readFile(String fileName)
protected org.eclipse.jgit.dircache.DirCache	readTree(org.eclipse.jgit.revwalk.RevTree tree)
protected String	readUTF8(String fileName)
protected void	saveConfig(String fileName, org.eclipse.jgit.lib.Config cfg)
protected void	saveFile(String fileName, byte[] raw)
protected void	saveUTF8(String fileName, String text)
protected static void	set(org.eclipse.jgit.lib.Config rc, String section, String subsection, String name, boolean value)
protected static <E extends Enum<?>> void	set(org.eclipse.jgit.lib.Config rc, String section, String subsection, String name, E value, E defaultValue)
protected static void	set(org.eclipse.jgit.lib.Config rc, String section, String subsection, String name, String value)

Methods inherited from class java.lang.Object

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

Field Detail

revision

protected org.eclipse.jgit.revwalk.RevCommit revision

reader

protected org.eclipse.jgit.lib.ObjectReader reader

inserter

protected org.eclipse.jgit.lib.ObjectInserter inserter

newTree

protected org.eclipse.jgit.dircache.DirCache newTree

Constructor Detail

VersionedMetaData

public VersionedMetaData()

Method Detail

getRefName

protected abstract String getRefName()

Returns:

name of the reference storing this configuration.

onLoad

protected abstract void onLoad()
                        throws IOException,
                               org.eclipse.jgit.errors.ConfigInvalidException

Set up the metadata, parsing any state from the loaded revision.

Throws:

IOException

org.eclipse.jgit.errors.ConfigInvalidException

onSave

protected abstract boolean onSave(org.eclipse.jgit.lib.CommitBuilder commit)
                           throws IOException,
                                  org.eclipse.jgit.errors.ConfigInvalidException

Save any changes to the metadata in a commit.

Returns:

true if the commit should proceed, false to abort.

Throws:

IOException

org.eclipse.jgit.errors.ConfigInvalidException

getRevision

public org.eclipse.jgit.lib.ObjectId getRevision()

Returns:

revision of the metadata that was loaded.

load

public void load(org.eclipse.jgit.lib.Repository db)
          throws IOException,
                 org.eclipse.jgit.errors.ConfigInvalidException

Load the current version from the branch.

The repository is not held after the call completes, allowing the application to retain this object for long periods of time.

Parameters:

db - repository to access.

Throws:

IOException

org.eclipse.jgit.errors.ConfigInvalidException

load

public void load(org.eclipse.jgit.lib.Repository db,
                 org.eclipse.jgit.lib.ObjectId id)
          throws IOException,
                 org.eclipse.jgit.errors.ConfigInvalidException

Load a specific version from the repository.

This method is primarily useful for applying updates to a specific revision that was shown to an end-user in the user interface. If there are conflicts with another user's concurrent changes, these will be automatically detected at commit time.

The repository is not held after the call completes, allowing the application to retain this object for long periods of time.

Parameters:

db - repository to access.

id - revision to load.

Throws:

IOException

org.eclipse.jgit.errors.ConfigInvalidException

load

public void load(org.eclipse.jgit.revwalk.RevWalk walk,
                 org.eclipse.jgit.lib.ObjectId id)
          throws IOException,
                 org.eclipse.jgit.errors.ConfigInvalidException

Load a specific version from an open walk.

This method is primarily useful for applying updates to a specific revision that was shown to an end-user in the user interface. If there are conflicts with another user's concurrent changes, these will be automatically detected at commit time.

The caller retains ownership of the walk and is responsible for closing it. However, this instance does not hold a reference to the walk or the repository after the call completes, allowing the application to retain this object for long periods of time.

Parameters:

walk - open walk to access to access.

id - revision to load.

Throws:

IOException

org.eclipse.jgit.errors.ConfigInvalidException

load

public void load(MetaDataUpdate update)
          throws IOException,
                 org.eclipse.jgit.errors.ConfigInvalidException

Throws:

IOException

org.eclipse.jgit.errors.ConfigInvalidException

load

public void load(MetaDataUpdate update,
                 org.eclipse.jgit.lib.ObjectId id)
          throws IOException,
                 org.eclipse.jgit.errors.ConfigInvalidException

Throws:

IOException

org.eclipse.jgit.errors.ConfigInvalidException

commit

public org.eclipse.jgit.revwalk.RevCommit commit(MetaDataUpdate update)
                                          throws IOException

Update this metadata branch, recording a new commit on its reference.

Parameters:

update - helper information to define the update that will occur.

Returns:

the commit that was created

Throws:

IOException - if there is a storage problem and the update cannot be executed as requested or if it failed because of a concurrent update to the same reference

commitToNewRef

public org.eclipse.jgit.revwalk.RevCommit commitToNewRef(MetaDataUpdate update,
                                                         String refName)
                                                  throws IOException

Creates a new commit and a new ref based on this commit.

Parameters:

update - helper information to define the update that will occur.

refName - name of the ref that should be created

Returns:

the commit that was created

Throws:

IOException - if there is a storage problem and the update cannot be executed as requested or if it failed because of a concurrent update to the same reference

openUpdate

public VersionedMetaData.BatchMetaDataUpdate openUpdate(MetaDataUpdate update)
                                                 throws IOException

Open a batch of updates to the same metadata ref.

This allows making multiple commits to a single metadata ref, at the end of which is a single ref update. For batching together updates to multiple refs (each consisting of one or more commits against their respective refs), create the MetaDataUpdate with a BatchRefUpdate.

A ref update produced by this VersionedMetaData.BatchMetaDataUpdate is only committed if there is no associated BatchRefUpdate. As a result, the configured ref updated event is not fired if there is an associated batch.

Parameters:

update - helper info about the update.

Throws:

IOException - if the update failed.

readTree

protected org.eclipse.jgit.dircache.DirCache readTree(org.eclipse.jgit.revwalk.RevTree tree)
                                               throws IOException,
                                                      org.eclipse.jgit.errors.MissingObjectException,
                                                      org.eclipse.jgit.errors.IncorrectObjectTypeException

Throws:

IOException

org.eclipse.jgit.errors.MissingObjectException

org.eclipse.jgit.errors.IncorrectObjectTypeException

readConfig

protected org.eclipse.jgit.lib.Config readConfig(String fileName)
                                          throws IOException,
                                                 org.eclipse.jgit.errors.ConfigInvalidException

Throws:

IOException

org.eclipse.jgit.errors.ConfigInvalidException

readUTF8

protected String readUTF8(String fileName)
                   throws IOException

Throws:

IOException

readFile

protected byte[] readFile(String fileName)
                   throws IOException

Throws:

IOException

getObjectId

protected org.eclipse.jgit.lib.ObjectId getObjectId(String fileName)
                                             throws IOException

Throws:

IOException

getPathInfos

public List<VersionedMetaData.PathInfo> getPathInfos(boolean recursive)
                                              throws IOException

Throws:

IOException

set

protected static void set(org.eclipse.jgit.lib.Config rc,
                          String section,
                          String subsection,
                          String name,
                          String value)

set

protected static void set(org.eclipse.jgit.lib.Config rc,
                          String section,
                          String subsection,
                          String name,
                          boolean value)

set

protected static <E extends Enum<?>> void set(org.eclipse.jgit.lib.Config rc,
                                              String section,
                                              String subsection,
                                              String name,
                                              E value,
                                              E defaultValue)

saveConfig

protected void saveConfig(String fileName,
                          org.eclipse.jgit.lib.Config cfg)
                   throws IOException

Throws:

IOException

saveUTF8

protected void saveUTF8(String fileName,
                        String text)
                 throws IOException

Throws:

IOException

saveFile

protected void saveFile(String fileName,
                        byte[] raw)
                 throws IOException

Throws:

IOException