C# Class Lucene.Net.Index.IndexUpgrader

this is an easy-to-use tool that upgrades all segments of an index from previous Lucene versions to the current segment file format. It can be used from command line:

 java -cp lucene-core.jar Lucene.Net.Index.IndexUpgrader [-delete-prior-commits] [-verbose] indexDir

Alternatively this class can be instantiated and #upgrade invoked. It uses UpgradeIndexMergePolicy and triggers the upgrade via an forceMerge request to IndexWriter.

this tool keeps only the last commit in an index; for this reason, if the incoming index has more than one commit, the tool refuses to run by default. Specify {@code -delete-prior-commits} to override this, allowing the tool to delete all but the last commit. From Java code this can be enabled by passing {@code true} to #IndexUpgrader(Directory,Version,StreamWriter,boolean).

Warning: this tool may reorder documents if the index was partially upgraded before execution (e.g., documents were added). If your application relies on "monotonicity" of doc IDs (which means that the order in which the documents were added to the index is preserved), do a full forceMerge instead. The MergePolicy set by IndexWriterConfig may also reorder documents.

Mostrar archivo Open project: paulirwin/lucene.net Class Usage Examples

Public Methods

Method	Description
IndexUpgrader ( Directory dir, IndexWriterConfig iwc, bool deletePriorCommits ) : System	Creates index upgrader on the given directory, using an IndexWriter using the given config. You have the possibility to upgrade indexes with multiple commit points by removing all older ones.
IndexUpgrader ( Directory dir, System.Version matchVersion ) : System	Creates index upgrader on the given directory, using an IndexWriter using the given {@code matchVersion}. The tool refuses to upgrade indexes with multiple commit points.
IndexUpgrader ( Directory dir, System.Version matchVersion, TextWriter infoStream, bool deletePriorCommits ) : System	Creates index upgrader on the given directory, using an IndexWriter using the given {@code matchVersion}. You have the possibility to upgrade indexes with multiple commit points by removing all older ones. If {@code infoStream} is not {@code null}, all logging output will be sent to this stream.
ParseArgs ( string args ) : IndexUpgrader	Main method to run {code IndexUpgrader} from the command-line.
Upgrade ( ) : void	Perform the upgrade.

Private Methods

Method	Description
PrintUsage ( ) : void

Method Details

IndexUpgrader() public method

Creates index upgrader on the given directory, using an IndexWriter using the given config. You have the possibility to upgrade indexes with multiple commit points by removing all older ones.

public IndexUpgrader ( Directory dir, IndexWriterConfig iwc, bool deletePriorCommits ) : System
dir	System.IO.Directory
iwc	IndexWriterConfig
deletePriorCommits	bool
return	System

IndexUpgrader() public method

Creates index upgrader on the given directory, using an IndexWriter using the given {@code matchVersion}. The tool refuses to upgrade indexes with multiple commit points.

public IndexUpgrader ( Directory dir, System.Version matchVersion ) : System
dir	System.IO.Directory
matchVersion	System.Version
return	System

IndexUpgrader() public method

Creates index upgrader on the given directory, using an IndexWriter using the given {@code matchVersion}. You have the possibility to upgrade indexes with multiple commit points by removing all older ones. If {@code infoStream} is not {@code null}, all logging output will be sent to this stream.

public IndexUpgrader ( Directory dir, System.Version matchVersion, TextWriter infoStream, bool deletePriorCommits ) : System
dir	System.IO.Directory
matchVersion	System.Version
infoStream	System.IO.TextWriter
deletePriorCommits	bool
return	System

ParseArgs() public static method

Main method to run {code IndexUpgrader} from the command-line.

public static ParseArgs ( string args ) : IndexUpgrader
args	string
return	IndexUpgrader

Upgrade() public method

Perform the upgrade.

public Upgrade ( ) : void
return	void