Package db
Class Database.DBBufferFileManager
java.lang.Object
db.Database.DBBufferFileManager
- All Implemented Interfaces:
BufferFileManager
- Enclosing class:
Database
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptiongetBufferFile
(int version) Get the buffer file corresponding to a specified version.getChangeDataFile
(int version) Get the change data buffer file corresponding to the specified version.Returns the change map file corresponding to this DB if one is defined.int
Returns the current version.getVersionFile
(int version) Get the buffer version file corresponding to a specified version.void
updateEnded
(long checkinId) Callback indicating that a buffer file update has ended without creating a new version.void
versionCreated
(int version, String comment, long checkinId) Callback for when a buffer file is created.
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Constructor Details
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DBBufferFileManager
protected DBBufferFileManager()
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Method Details
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getCurrentVersion
public int getCurrentVersion()Description copied from interface:BufferFileManager
Returns the current version. A value of 0 indicates that the first buffer file has not yet been created.- Specified by:
getCurrentVersion
in interfaceBufferFileManager
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getBufferFile
Description copied from interface:BufferFileManager
Get the buffer file corresponding to a specified version.- Specified by:
getBufferFile
in interfaceBufferFileManager
- Parameters:
version
-- Returns:
- database buffer file.
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getVersionFile
Description copied from interface:BufferFileManager
Get the buffer version file corresponding to a specified version. This file contains data corresponding to a specified buffer file version and those buffers which have been modified in the next version (version+1). May return null if version files not used.- Specified by:
getVersionFile
in interfaceBufferFileManager
- Parameters:
version
- version of the original buffer file to be reconstructed- Returns:
- buffer version file.
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getChangeMapFile
Description copied from interface:BufferFileManager
Returns the change map file corresponding to this DB if one is defined. This file tracks all buffers which have been modified during a save operation.- Specified by:
getChangeMapFile
in interfaceBufferFileManager
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getChangeDataFile
Description copied from interface:BufferFileManager
Get the change data buffer file corresponding to the specified version. This file contains application specific changes which were made going from the specified version to the next version (version+1). May return null if change data files are not used.- Specified by:
getChangeDataFile
in interfaceBufferFileManager
- Parameters:
version
- version of the original buffer file which was changed- Returns:
- change data buffer file.
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versionCreated
public void versionCreated(int version, String comment, long checkinId) throws FileNotFoundException Description copied from interface:BufferFileManager
Callback for when a buffer file is created.- Specified by:
versionCreated
in interfaceBufferFileManager
- Parameters:
version
-comment
-checkinId
- associated checkinId- Throws:
FileNotFoundException
- database files not found
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updateEnded
public void updateEnded(long checkinId) Description copied from interface:BufferFileManager
Callback indicating that a buffer file update has ended without creating a new version. This method terminates the checkin session.- Specified by:
updateEnded
in interfaceBufferFileManager
- Parameters:
checkinId
- associated checkinId
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