public class FacetsPayloadProcessorProvider extends PayloadProcessorProvider
PayloadProcessorProviderfor updating facets ordinal references, based on an ordinal map. You should use this code in conjunction with merging taxonomies - after you merge taxonomies, you receive an
DirectoryTaxonomyWriter.OrdinalMapwhich maps the 'old' payloads to the 'new' ones. You can use that map to re-map the payloads which contain the facets information (ordinals) either before or while merging the indexes.
For re-mapping the ordinals before you merge the indexes, do the following:
// merge the old taxonomy with the new one. OrdinalMap map = LuceneTaxonomyWriter.addTaxonomies(); int ordmap = map.getMap(); // re-map the ordinals on the old directory. Directory oldDir; FacetsPayloadProcessorProvider fppp = new FacetsPayloadProcessorProvider( oldDir, ordmap); IndexWriterConfig conf = new IndexWriterConfig(VER, ANALYZER); conf.setMergePolicy(new ForceOptimizeMergePolicy()); IndexWriter writer = new IndexWriter(oldDir, conf); writer.setPayloadProcessorProvider(fppp); writer.forceMerge(1); writer.close(); // merge that directory with the new index. IndexWriter newWriter; // opened on the 'new' Directory newWriter.addIndexes(oldDir); newWriter.commit();For re-mapping the ordinals during index merge, do the following:
// merge the old taxonomy with the new one. OrdinalMap map = LuceneTaxonomyWriter.addTaxonomies(); int ordmap = map.getMap(); // Add the index and re-map ordinals on the go IndexReader r = IndexReader.open(oldDir); IndexWriterConfig conf = new IndexWriterConfig(VER, ANALYZER); IndexWriter writer = new IndexWriter(newDir, conf); writer.setPayloadProcessorProvider(fppp); writer.addIndexes(r); writer.commit();
NOTE: while the second example looks simpler, IndexWriter may trigger a long merge due to addIndexes. The first example avoids this perhaps unneeded merge, as well as can be done separately (e.g. on another node) before the index is merged.
|Modifier and Type||Class and Description|
A PayloadProcessor for updating facets ordinal references, based on an ordinal map
|Constructor and Description|
Construct FacetsPayloadProcessorProvider with FacetIndexingParams
public FacetsPayloadProcessorProvider(Directory dir, int ordinalMap, FacetIndexingParams indexingParams)
Directorycontaining the segments to update
ordinalMap- an array mapping previous facets ordinals to new ones
indexingParams- the facets indexing parameters
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