Examples with Cache org.elasticsearch.common.cache.Cache used on opensource projects

Example 1 with Cache

use of org.elasticsearch.common.cache.Cache in project elasticsearch by elastic.

the class BitsetFilterCache method getAndLoadIfNotPresent.

private BitSet getAndLoadIfNotPresent(final Query query, final LeafReaderContext context) throws IOException, ExecutionException {
    final Object coreCacheReader = context.reader().getCoreCacheKey();
    final ShardId shardId = ShardUtils.extractShardId(context.reader());
    if (// can't require it because of the percolator
    shardId != null && indexSettings.getIndex().equals(shardId.getIndex()) == false) {
        // insanity
        throw new IllegalStateException("Trying to load bit set for index " + shardId.getIndex() + " with cache of index " + indexSettings.getIndex());
    }
    Cache<Query, Value> filterToFbs = loadedFilters.computeIfAbsent(coreCacheReader, key -> {
        context.reader().addCoreClosedListener(BitsetFilterCache.this);
        return CacheBuilder.<Query, Value>builder().build();
    });
    return filterToFbs.computeIfAbsent(query, key -> {
        final IndexReaderContext topLevelContext = ReaderUtil.getTopLevelContext(context);
        final IndexSearcher searcher = new IndexSearcher(topLevelContext);
        searcher.setQueryCache(null);
        final Weight weight = searcher.createNormalizedWeight(query, false);
        Scorer s = weight.scorer(context);
        final BitSet bitSet;
        if (s == null) {
            bitSet = null;
        } else {
            bitSet = BitSet.of(s.iterator(), context.reader().maxDoc());
        }
        Value value = new Value(bitSet, shardId);
        listener.onCache(shardId, value.bitset);
        return value;
    }).bitset;
}