org.apache.hadoop.contrib.index.lucene.TestMixedDirectory.java Source code

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Here is the source code for org.apache.hadoop.contrib.index.lucene.TestMixedDirectory.java

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/**
 * 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.
 */

package org.apache.hadoop.contrib.index.lucene;

import java.io.IOException;

import junit.framework.TestCase;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexDeletionPolicy;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.KeepOnlyLastCommitDeletionPolicy;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.IndexOutput;
import org.apache.lucene.store.RAMDirectory;

public class TestMixedDirectory extends TestCase {
    private int numDocsPerUpdate = 10;
    private int maxBufferedDocs = 2;

    public void testMixedDirectoryAndPolicy() throws IOException {
        Directory readDir = new RAMDirectory();
        updateIndex(readDir, 0, numDocsPerUpdate, new KeepOnlyLastCommitDeletionPolicy());

        verify(readDir, numDocsPerUpdate);

        IndexOutput out = readDir.createOutput("_" + (numDocsPerUpdate / maxBufferedDocs + 2) + ".cfs");
        out.writeInt(0);
        out.close();

        Directory writeDir = new RAMDirectory();
        Directory mixedDir = new MixedDirectory(readDir, writeDir);
        updateIndex(mixedDir, numDocsPerUpdate, numDocsPerUpdate, new MixedDeletionPolicy());

        verify(readDir, numDocsPerUpdate);
        verify(mixedDir, 2 * numDocsPerUpdate);
    }

    public void updateIndex(Directory dir, int base, int numDocs, IndexDeletionPolicy policy) throws IOException {
        IndexWriter writer = new IndexWriter(dir, false, new StandardAnalyzer(), policy);
        writer.setMaxBufferedDocs(maxBufferedDocs);
        writer.setMergeFactor(1000);
        for (int i = 0; i < numDocs; i++) {
            addDoc(writer, base + i);
        }
        writer.close();
    }

    private void addDoc(IndexWriter writer, int id) throws IOException {
        Document doc = new Document();
        doc.add(new Field("id", String.valueOf(id), Field.Store.YES, Field.Index.UN_TOKENIZED));
        doc.add(new Field("content", "apache", Field.Store.NO, Field.Index.TOKENIZED));
        writer.addDocument(doc);
    }

    private void verify(Directory dir, int expectedHits) throws IOException {
        IndexSearcher searcher = new IndexSearcher(dir);
        Hits hits = searcher.search(new TermQuery(new Term("content", "apache")));
        int numHits = hits.length();

        assertEquals(expectedHits, numHits);

        int[] docs = new int[numHits];
        for (int i = 0; i < numHits; i++) {
            Document hit = hits.doc(i);
            docs[Integer.parseInt(hit.get("id"))]++;
        }
        for (int i = 0; i < numHits; i++) {
            assertEquals(1, docs[i]);
        }

        searcher.close();
    }

}