org.apache.blur.server.IndexSearcherClosable.java Source code

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Here is the source code for org.apache.blur.server.IndexSearcherClosable.java

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package org.apache.blur.server;

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership. The ASF
 * licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
import java.io.Closeable;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.ExecutorService;

import org.apache.blur.trace.Trace;
import org.apache.blur.trace.Tracer;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.CollectionTerminatedException;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.search.Weight;
import org.apache.lucene.store.Directory;

public abstract class IndexSearcherClosable extends IndexSearcher implements Closeable {

    public IndexSearcherClosable(IndexReader r, ExecutorService executor) {
        super(r, executor);
    }

    public abstract Directory getDirectory();

    @Override
    public abstract void close() throws IOException;

    protected void search(List<AtomicReaderContext> leaves, Weight weight, Collector collector) throws IOException {

        // TODO: should we make this
        // threaded...? the Collector could be sync'd?
        // always use single thread:
        for (AtomicReaderContext ctx : leaves) { // search each subreader
            Tracer trace = Trace.trace("search - internal", Trace.param("AtomicReader", ctx.reader()));
            try {
                try {
                    collector.setNextReader(ctx);
                } catch (CollectionTerminatedException e) {
                    // there is no doc of interest in this reader context
                    // continue with the following leaf
                    continue;
                }
                Scorer scorer = weight.scorer(ctx, !collector.acceptsDocsOutOfOrder(), true,
                        ctx.reader().getLiveDocs());
                if (scorer != null) {
                    try {
                        scorer.score(collector);
                    } catch (CollectionTerminatedException e) {
                        // collection was terminated prematurely
                        // continue with the following leaf
                    }
                }
            } finally {
                trace.done();
            }
        }
    }

}