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the-algorithm
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optimize DocValuesHelper.java 

Signed-off-by: Rajiv Ranjan Singh <rajivperfect007@gmail.com>
This commit is contained in:
Rajiv Ranjan Singh 2023-04-01 09:57:09 +05:30
parent ec83d01dca
commit 86c4e8c3e5
1 changed files with 22 additions and 23 deletions
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45
src/java/com/twitter/search/earlybird/index/DocValuesHelper.java
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@ -1,6 +1,8 @@
package com.twitter.search.earlybird.index;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.lucene.index.LeafReader;
import org.apache.lucene.index.Terms;
@ -9,6 +11,8 @@ import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.util.BytesRef;
public final class DocValuesHelper {
private static final Map<String, TermsEnum> termsEnumCache = new ConcurrentHashMap<>();
private DocValuesHelper() {
}
@ -22,13 +26,10 @@ public final class DocValuesHelper {
*/
public static int getFirstDocIdWithValue(
LeafReader reader, String indexField, BytesRef value) throws IOException {
TermsEnum termsEnum = getTermsEnum(reader, indexField);
if (termsEnum == null || !termsEnum.seekExact(value)) {
return DocIdSetIterator.NO_MORE_DOCS;
try (DocIdSetIterator docsIterator = getTermsEnum(reader, indexField).postings(null)) {
int docId = docsIterator.nextDoc();
return docId == DocIdSetIterator.NO_MORE_DOCS ? docId : docId;
}
DocIdSetIterator docsIterator = termsEnum.postings(null);
return docsIterator.nextDoc();
}
/**
@ -44,27 +45,25 @@ public final class DocValuesHelper {
*/
public static int getLargestDocIdWithCeilOfValue(
LeafReader reader, String indexField, BytesRef value) throws IOException {
TermsEnum termsEnum = getTermsEnum(reader, indexField);
if (termsEnum == null) {
return DocIdSetIterator.NO_MORE_DOCS;
try (DocIdSetIterator docsIterator = getTermsEnum(reader, indexField).postings(null)) {
int docId = docsIterator.nextDoc();
while (docsIterator.nextDoc() != DocIdSetIterator.NO_MORE_DOCS) {
docId = docsIterator.docID();
}
return docId;
}
if (termsEnum.seekCeil(value) == TermsEnum.SeekStatus.END) {
return DocIdSetIterator.NO_MORE_DOCS;
}
DocIdSetIterator docsIterator = termsEnum.postings(null);
int docId = docsIterator.nextDoc();
while (docsIterator.nextDoc() != DocIdSetIterator.NO_MORE_DOCS) {
docId = docsIterator.docID();
}
return docId;
}
private static TermsEnum getTermsEnum(LeafReader reader, String indexField) throws IOException {
Terms terms = reader.terms(indexField);
if (terms == null) {
return null;
TermsEnum termsEnum = termsEnumCache.get(indexField);
if (termsEnum == null) {
Terms terms = reader.terms(indexField);
if (terms == null) {
return null;
}
termsEnum = terms.iterator();
termsEnumCache.put(indexField, termsEnum);
}
return terms.iterator();
return termsEnum;
}
}