Package org.apache.lucene.store
Class TrackingDirectoryWrapper
java.lang.Object
org.apache.lucene.store.Directory
org.apache.lucene.store.FilterDirectory
org.apache.lucene.store.TrackingDirectoryWrapper
- All Implemented Interfaces:
Closeable,AutoCloseable
A delegating Directory that records which files were written to and deleted.
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Field Summary
Fields inherited from class org.apache.lucene.store.FilterDirectory
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoidvoidCopies an existingsrcfile from directoryfromto a non-existent filedestin this directory.createOutput(String name, IOContext context) Creates a new, empty file in the directory and returns anIndexOutputinstance for appending data to this file.createTempOutput(String prefix, String suffix, IOContext context) Creates a new, empty, temporary file in the directory and returns anIndexOutputinstance for appending data to this file.voiddeleteFile(String name) Removes an existing file in the directory.NOTE: returns a copy of the created files.voidRenamessourcefile todestfile wheredestmust not already exist in the directory.Methods inherited from class org.apache.lucene.store.FilterDirectory
close, ensureOpen, fileLength, getDelegate, getPendingDeletions, listAll, obtainLock, openInput, sync, syncMetaData, toString, unwrapMethods inherited from class org.apache.lucene.store.Directory
getTempFileName, openChecksumInput
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Constructor Details
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TrackingDirectoryWrapper
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Method Details
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deleteFile
Description copied from class:DirectoryRemoves an existing file in the directory.This method must throw either
NoSuchFileExceptionorFileNotFoundExceptionifnamepoints to a non-existing file.- Overrides:
deleteFilein classFilterDirectory- Parameters:
name- the name of an existing file.- Throws:
IOException- in case of I/O error
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createOutput
Description copied from class:DirectoryCreates a new, empty file in the directory and returns anIndexOutputinstance for appending data to this file.This method must throw
FileAlreadyExistsExceptionif the file already exists.- Overrides:
createOutputin classFilterDirectory- Parameters:
name- the name of the file to create.- Throws:
IOException- in case of I/O error
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createTempOutput
public IndexOutput createTempOutput(String prefix, String suffix, IOContext context) throws IOException Description copied from class:DirectoryCreates a new, empty, temporary file in the directory and returns anIndexOutputinstance for appending data to this file.The temporary file name (accessible via
IndexOutput.getName()) will start withprefix, end withsuffixand have a reserved file extension.tmp.- Overrides:
createTempOutputin classFilterDirectory- Throws:
IOException
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copyFrom
Description copied from class:DirectoryCopies an existingsrcfile from directoryfromto a non-existent filedestin this directory. The given IOContext is only used for opening the destination file.- Overrides:
copyFromin classDirectory- Throws:
IOException
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rename
Description copied from class:DirectoryRenamessourcefile todestfile wheredestmust not already exist in the directory.It is permitted for this operation to not be truly atomic, for example both
sourceanddestcan be visible temporarily inDirectory.listAll(). However, the implementation of this method must ensure the content ofdestappears as the entiresourceatomically. So oncedestis visible for readers, the entire content of previoussourceis visible.This method is used by IndexWriter to publish commits.
- Overrides:
renamein classFilterDirectory- Throws:
IOException
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getCreatedFiles
NOTE: returns a copy of the created files. -
clearCreatedFiles
public void clearCreatedFiles()
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