org.dizitart.no2.store.NitriteMVStore Maven / Gradle / Ivy

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/*
 *
 * Copyright 2017-2018 Nitrite author or authors.
 *
 * 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 org.dizitart.no2.store;

import org.dizitart.no2.meta.Attributes;
import org.h2.mvstore.MVMap;
import org.h2.mvstore.MVStore;

import java.util.Set;

import static org.dizitart.no2.Constants.META_MAP_NAME;

/**
 * A {@link MVStore} backed {@link NitriteStore} implementation.
 *
 * @since 1.0
 * @author Anindya Chatterjee.
 */
public final class NitriteMVStore implements NitriteStore {
    private final MVStore mvStore;

    /**
     * Instantiates a new {@link NitriteMVStore}.
     *
     * @param store the store
     */
    public NitriteMVStore(MVStore store) {
        this.mvStore = store;
    }

    @Override
    public Set getMapNames() {
        return mvStore.getMapNames();
    }

    @Override
    public boolean hasUnsavedChanges() {
        return mvStore.hasUnsavedChanges();
    }

    @Override
    public boolean isClosed() {
        return mvStore.isClosed();
    }

    @Override
    public void compact() {
        mvStore.compactMoveChunks();
    }

    @Override
    public void commit() {
        mvStore.commit();
    }

    @Override
    public void close() {
        mvStore.close();
    }

    @Override
    public void closeImmediately() {
        mvStore.closeImmediately();
    }

    @Override
    public boolean hasMap(String mapName) {
        return mvStore.hasMap(mapName);
    }

    @Override
    public  NitriteMap openMap(String mapName) {
        MVMap mvMap = mvStore.openMap(mapName);
        return new NitriteMVMap<>(mvMap, this);
    }

    @Override
    public  void removeMap(NitriteMap map) {
        NitriteMVMap nitriteMVMap = (NitriteMVMap) map;
        MVMap mvMap = nitriteMVMap.getUnderlyingMVMap();
        mvStore.removeMap(mvMap);
    }

    @Override
    public NitriteMap metaMap() {
        MVMap mvMap = mvStore.openMap(META_MAP_NAME);
        return new NitriteMVMap<>(mvMap, this);
    }
}