Package org.apache.lucene.facet.index
Class FacetsPayloadProcessorProvider
- java.lang.Object
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- org.apache.lucene.index.PayloadProcessorProvider
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- org.apache.lucene.facet.index.FacetsPayloadProcessorProvider
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public class FacetsPayloadProcessorProvider extends org.apache.lucene.index.PayloadProcessorProvider
APayloadProcessorProvider
for 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 anDirectoryTaxonomyWriter.OrdinalMap
which 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.
- WARNING: This API is experimental and might change in incompatible ways in the next release.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
FacetsPayloadProcessorProvider.FacetsDirPayloadProcessor
static class
FacetsPayloadProcessorProvider.FacetsPayloadProcessor
A PayloadProcessor for updating facets ordinal references, based on an ordinal map-
Nested classes/interfaces inherited from class org.apache.lucene.index.PayloadProcessorProvider
org.apache.lucene.index.PayloadProcessorProvider.DirPayloadProcessor, org.apache.lucene.index.PayloadProcessorProvider.PayloadProcessor, org.apache.lucene.index.PayloadProcessorProvider.ReaderPayloadProcessor
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Constructor Summary
Constructors Constructor Description FacetsPayloadProcessorProvider(org.apache.lucene.store.Directory dir, int[] ordinalMap, FacetIndexingParams indexingParams)
Construct FacetsPayloadProcessorProvider with FacetIndexingParams
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description org.apache.lucene.index.PayloadProcessorProvider.ReaderPayloadProcessor
getReaderProcessor(org.apache.lucene.index.IndexReader reader)
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Constructor Detail
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FacetsPayloadProcessorProvider
public FacetsPayloadProcessorProvider(org.apache.lucene.store.Directory dir, int[] ordinalMap, FacetIndexingParams indexingParams)
Construct FacetsPayloadProcessorProvider with FacetIndexingParams- Parameters:
dir
- theDirectory
containing the segments to updateordinalMap
- an array mapping previous facets ordinals to new onesindexingParams
- the facets indexing parameters
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Method Detail
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getReaderProcessor
public org.apache.lucene.index.PayloadProcessorProvider.ReaderPayloadProcessor getReaderProcessor(org.apache.lucene.index.IndexReader reader) throws IOException
- Overrides:
getReaderProcessor
in classorg.apache.lucene.index.PayloadProcessorProvider
- Throws:
IOException
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