modules/hibernate-ext/hibernate/src/main/java/org/apache/ignite/cache/hibernate/HibernateRegion.java

/*
 * 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.ignite.cache.hibernate;

import java.util.Collections;
import java.util.Map;
import org.apache.ignite.Ignite;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.spi.Region;

/**
 * Implementation of {@link Region}. This interface defines base contract for all L2 cache regions.
 */
public class HibernateRegion implements Region {
    /** */
    protected final HibernateRegionFactory factory;

    /** */
    private final String name;

    /** Cache instance. */
    protected final HibernateCacheProxy cache;

    /** Grid instance. */
    protected Ignite ignite;

    /**
     * @param factory Region factory.
     * @param name Region name.
     * @param ignite Grid.
     * @param cache Region cache.
     */
    public HibernateRegion(HibernateRegionFactory factory, String name, Ignite ignite, HibernateCacheProxy cache) {
        this.factory = factory;
        this.name = name;
        this.ignite = ignite;
        this.cache = cache;
    }

    /** {@inheritDoc} */
    @Override public String getName() {
        return name;
    }

    /** {@inheritDoc} */
    @Override public void destroy() throws CacheException {
        // No-op.
    }

    /** {@inheritDoc} */
    @Override public boolean contains(Object key) {
        return cache.containsKey(key);
    }

    /** {@inheritDoc} */
    @Override public long getSizeInMemory() {
        return -1;
    }

    /** {@inheritDoc} */
    @Override public long getElementCountInMemory() {
        return cache.size();
    }

    /** {@inheritDoc} */
    @Override public long getElementCountOnDisk() {
        return -1;
    }

    /** {@inheritDoc} */
    @Override public Map toMap() {
        return Collections.emptyMap();
    }

    /** {@inheritDoc} */
    @Override public long nextTimestamp() {
        return System.currentTimeMillis();
    }

    /** {@inheritDoc} */
    @Override public int getTimeout() {
        return 0;
    }
}