org.opendaylight.infrautils.caches.noop.internal.NoopCacheStats Maven / Gradle / Ivy

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/*
 * Copyright (c) 2017 Red Hat, Inc. and others. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.infrautils.caches.noop.internal;

import com.google.common.collect.ImmutableMap;
import org.opendaylight.infrautils.caches.CacheStats;

/**
 * No Operation ("NOOP") implementation of CacheStats.
 *
 * @author Michael Vorburger.ch
 * @deprecated This interface will be retired as part of https://jira.opendaylight.org/browse/INFRAUTILS-82
 */
@Deprecated(since = "2.0.7", forRemoval = true)
final class NoopCacheStats implements CacheStats {
    static final CacheStats INSTANCE = new NoopCacheStats();

    private NoopCacheStats() {

    }

    @Override
    public long estimatedCurrentEntries() {
        return 0;
    }

    @Override
    public long missCount() {
        return 0;
    }

    @Override
    public long hitCount() {
        return 0;
    }

    @Override
    public ImmutableMap extensions() {
        return ImmutableMap.of();
    }
}