Examples with MultiReader org.apache.lucene.index.MultiReader used on opensource projects

Example 26 with MultiReader

use of org.apache.lucene.index.MultiReader in project OpenGrok by OpenGrok.

the class RuntimeEnvironment method getMultiReader.

/**
 * Return collection of IndexReader objects as MultiReader object
 * for given list of projects.
 * The caller is responsible for releasing the IndexSearcher objects
 * so we add them to the map.
 *
 * @param projects list of projects
 * @param searcherList each SuperIndexSearcher produced will be put into this list
 * @return MultiReader for the projects
 */
public MultiReader getMultiReader(SortedSet<String> projects, ArrayList<SuperIndexSearcher> searcherList) {
    IndexReader[] subreaders = new IndexReader[projects.size()];
    int ii = 0;
    // TODO might need to rewrite to Project instead of String, need changes in projects.jspf too.
    for (String proj : projects) {
        try {
            SuperIndexSearcher searcher = getIndexSearcher(proj);
            subreaders[ii++] = searcher.getIndexReader();
            searcherList.add(searcher);
        } catch (IOException | NullPointerException ex) {
            LOGGER.log(Level.SEVERE, "cannot get IndexReader for project " + proj, ex);
            return null;
        }
    }
    MultiReader multiReader = null;
    try {
        multiReader = new MultiReader(subreaders, true);
    } catch (IOException ex) {
        LOGGER.log(Level.SEVERE, "cannot construct MultiReader for set of projects", ex);
    }
    return multiReader;
}

Example 27 with MultiReader

use of org.apache.lucene.index.MultiReader in project OpenGrok by OpenGrok.

the class SearchEngine method searchMultiDatabase.

/**
 * Perform search on multiple indexes in parallel.
 * @param paging whether to use paging (if yes, first X pages will load
 * faster)
 * @param root list of projects to search
 * @throws IOException
 */
private void searchMultiDatabase(List<Project> root, boolean paging) throws IOException {
    SortedSet<String> projects = new TreeSet<>();
    for (Project p : root) {
        projects.add(p.getName());
    }
    // We use MultiReader even for single project. This should
    // not matter given that MultiReader is just a cheap wrapper
    // around set of IndexReader objects.
    MultiReader searchables = RuntimeEnvironment.getInstance().getMultiReader(projects, searcherList);
    searcher = new IndexSearcher(searchables);
    searchIndex(searcher, paging);
}

Example 28 with MultiReader

use of org.apache.lucene.index.MultiReader in project elasticsearch by elastic.

the class RangeQueryRewriteTests method testRewriteEmptyReader.

public void testRewriteEmptyReader() throws Exception {
    IndexService indexService = createIndex("test");
    String mapping = XContentFactory.jsonBuilder().startObject().startObject("type").startObject("properties").startObject("foo").field("type", "date").endObject().endObject().endObject().endObject().string();
    indexService.mapperService().merge("type", new CompressedXContent(mapping), MergeReason.MAPPING_UPDATE, false);
    IndexReader reader = new MultiReader();
    QueryRewriteContext context = new QueryShardContext(0, indexService.getIndexSettings(), null, null, indexService.mapperService(), null, null, xContentRegistry(), null, reader, null);
    RangeQueryBuilder range = new RangeQueryBuilder("foo");
    // no values -> DISJOINT
    assertEquals(Relation.DISJOINT, range.getRelation(context));
}

Example 29 with MultiReader

use of org.apache.lucene.index.MultiReader in project elasticsearch by elastic.

the class QueryPhaseTests method testPostFilterDisablesCountOptimization.

public void testPostFilterDisablesCountOptimization() throws Exception {
    TestSearchContext context = new TestSearchContext(null);
    context.parsedQuery(new ParsedQuery(new MatchAllDocsQuery()));
    context.setSize(0);
    context.setTask(new SearchTask(123L, "", "", "", null));
    final AtomicBoolean collected = new AtomicBoolean();
    IndexSearcher contextSearcher = new IndexSearcher(new MultiReader()) {

        protected void search(List<LeafReaderContext> leaves, Weight weight, Collector collector) throws IOException {
            collected.set(true);
            super.search(leaves, weight, collector);
        }
    };
    QueryPhase.execute(context, contextSearcher);
    assertEquals(0, context.queryResult().topDocs().totalHits);
    assertFalse(collected.get());
    context.parsedPostFilter(new ParsedQuery(new MatchNoDocsQuery()));
    QueryPhase.execute(context, contextSearcher);
    assertEquals(0, context.queryResult().topDocs().totalHits);
    assertTrue(collected.get());
}

Example 30 with MultiReader

use of org.apache.lucene.index.MultiReader in project elasticsearch by elastic.

the class QueryPhaseTests method testMinScoreDisablesCountOptimization.

public void testMinScoreDisablesCountOptimization() throws Exception {
    TestSearchContext context = new TestSearchContext(null);
    context.parsedQuery(new ParsedQuery(new MatchAllDocsQuery()));
    context.setSize(0);
    context.setTask(new SearchTask(123L, "", "", "", null));
    final AtomicBoolean collected = new AtomicBoolean();
    IndexSearcher contextSearcher = new IndexSearcher(new MultiReader()) {

        protected void search(List<LeafReaderContext> leaves, Weight weight, Collector collector) throws IOException {
            collected.set(true);
            super.search(leaves, weight, collector);
        }
    };
    QueryPhase.execute(context, contextSearcher);
    assertEquals(0, context.queryResult().topDocs().totalHits);
    assertFalse(collected.get());
    context.minimumScore(1);
    QueryPhase.execute(context, contextSearcher);
    assertEquals(0, context.queryResult().topDocs().totalHits);
    assertTrue(collected.get());
}