Example usage for org.apache.lucene.search LRUQueryCache LRUQueryCache

Introduction

In this page you can find the example usage for org.apache.lucene.search LRUQueryCache LRUQueryCache.

Prototype

public LRUQueryCache(int maxSize, long maxRamBytesUsed) 

Source Link

Document

Create a new instance that will cache at most maxSize queries with at most maxRamBytesUsed bytes of memory.

Usage

From source file:org.elasticsearch.common.lucene.IndexCacheableQueryTests.java

License:Apache License

public void testCache() throws IOException {
    Directory dir = newDirectory();/*from www .  j av  a2  s . c  o m*/
    LRUQueryCache cache = new LRUQueryCache(10000, Long.MAX_VALUE);
    QueryCachingPolicy policy = QueryCachingPolicy.ALWAYS_CACHE;
    RandomIndexWriter writer = new RandomIndexWriter(getRandom(), dir);
    for (int i = 0; i < 10; ++i) {
        writer.addDocument(new Document());
    }

    IndexReader reader = writer.getReader();
    IndexSearcher searcher = newSearcher(reader);
    reader = searcher.getIndexReader(); // reader might be wrapped
    searcher.setQueryCache(cache);
    searcher.setQueryCachingPolicy(policy);

    assertEquals(0, cache.getCacheSize());
    DummyIndexCacheableQuery query = new DummyIndexCacheableQuery();
    searcher.count(query);
    int expectedCacheSize = reader.leaves().size();
    assertEquals(expectedCacheSize, cache.getCacheSize());
    searcher.count(query);
    assertEquals(expectedCacheSize, cache.getCacheSize());

    writer.addDocument(new Document());

    IndexReader reader2 = writer.getReader();
    searcher = newSearcher(reader2);
    reader2 = searcher.getIndexReader(); // reader might be wrapped
    searcher.setQueryCache(cache);
    searcher.setQueryCachingPolicy(policy);

    // since the query is only cacheable at the index level, it has to be recomputed on all leaves
    expectedCacheSize += reader2.leaves().size();
    searcher.count(query);
    assertEquals(expectedCacheSize, cache.getCacheSize());
    searcher.count(query);
    assertEquals(expectedCacheSize, cache.getCacheSize());

    reader.close();
    reader2.close();
    writer.close();
    assertEquals(0, cache.getCacheSize());
    dir.close();
}

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From source file:org.modeshape.jcr.index.lucene.Searcher.java

License:Apache License

protected Searcher(LuceneConfig config, IndexWriter writer, String name) {
    this.searchManager = config.searchManager(writer);
    this.queryCache = new LRUQueryCache(MAX_QUERIES_TO_CACHE, MAX_RAM_BYTES_TO_USE);
    this.searchManagerRefreshService = Executors.newScheduledThreadPool(1,
            new NamedThreadFactory(name + "-lucene-search-manager-refresher"));
    this.searchManagerRefreshResult = this.searchManagerRefreshService.scheduleWithFixedDelay(
            this::refreshSearchManager, 0, config.refreshTimeSeconds(), TimeUnit.SECONDS);
}

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