com.google.gerrit.lucene.GerritIndexWriterConfig.java Source code

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Here is the source code for com.google.gerrit.lucene.GerritIndexWriterConfig.java

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// Copyright (C) 2016 The Android Open Source Project
//
// Licensed 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 com.google.gerrit.lucene;

import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.MINUTES;

import com.google.common.collect.ImmutableMap;
import com.google.gerrit.server.config.ConfigUtil;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.analysis.util.CharArraySet;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.eclipse.jgit.lib.Config;

import java.util.Map;

/**
 * Combination of Lucene {@link IndexWriterConfig} with additional
 * Gerrit-specific options.
 */
class GerritIndexWriterConfig {
    private static final Map<String, String> CUSTOM_CHAR_MAPPING = ImmutableMap.of("_", " ", ".", " ");

    private final IndexWriterConfig luceneConfig;
    private long commitWithinMs;
    private final CustomMappingAnalyzer analyzer;

    GerritIndexWriterConfig(Config cfg, String name) {
        analyzer = new CustomMappingAnalyzer(new StandardAnalyzer(CharArraySet.EMPTY_SET), CUSTOM_CHAR_MAPPING);
        luceneConfig = new IndexWriterConfig(analyzer).setOpenMode(OpenMode.CREATE_OR_APPEND)
                .setCommitOnClose(true);
        double m = 1 << 20;
        luceneConfig.setRAMBufferSizeMB(cfg.getLong("index", name, "ramBufferSize",
                (long) (IndexWriterConfig.DEFAULT_RAM_BUFFER_SIZE_MB * m)) / m);
        luceneConfig.setMaxBufferedDocs(
                cfg.getInt("index", name, "maxBufferedDocs", IndexWriterConfig.DEFAULT_MAX_BUFFERED_DOCS));
        try {
            commitWithinMs = ConfigUtil.getTimeUnit(cfg, "index", name, "commitWithin",
                    MILLISECONDS.convert(5, MINUTES), MILLISECONDS);
        } catch (IllegalArgumentException e) {
            commitWithinMs = cfg.getLong("index", name, "commitWithin", 0);
        }
    }

    CustomMappingAnalyzer getAnalyzer() {
        return analyzer;
    }

    IndexWriterConfig getLuceneConfig() {
        return luceneConfig;
    }

    long getCommitWithinMs() {
        return commitWithinMs;
    }
}