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

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

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// Copyright (C) 2013 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.server.git;

package com.google.gerrit.lucene;

import com.google.common.base.Throwables;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.gerrit.extensions.events.LifecycleListener;
import com.google.gerrit.server.config.SitePaths;
import com.google.gerrit.server.index.ChangeIndex;
import com.google.gerrit.server.index.FieldDef.FillArgs;
import com.google.inject.Inject;
import com.google.inject.Singleton;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.ExecutionException;

@Singleton
class LuceneChangeIndexManager implements ChangeIndex.Manager, LifecycleListener {
    private final LoadingCache<String, LuceneChangeIndex> indexes;

    @Inject
    LuceneChangeIndexManager(final SitePaths sitePaths, final FillArgs fillArgs) {
        indexes = CacheBuilder.newBuilder().build(new CacheLoader<String, LuceneChangeIndex>() {
            @Override
            public LuceneChangeIndex load(String key) throws IOException {
                return new LuceneChangeIndex(new File(sitePaths.index_dir, key), fillArgs);
            }
        });
    }

    @Override
    public void start() {
        // Do nothing.
    }

    @Override
    public void stop() {
        for (LuceneChangeIndex index : indexes.asMap().values()) {
            index.close();
        }
    }

    @Override
    public LuceneChangeIndex get(String name) throws IOException {
        try {
            return indexes.get(name);
        } catch (ExecutionException e) {
            Throwables.propagateIfInstanceOf(e.getCause(), IOException.class);
            throw new IOException(e);
        }
    }
}