com.hazelcast.nearcache.NearCacheStats Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2024, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.nearcache;
import com.hazelcast.instance.LocalInstanceStats;
/**
* Near Cache statistics.
*/
public interface NearCacheStats extends LocalInstanceStats {
/**
* @return creation time of this Near Cache on this member
*/
@Override
long getCreationTime();
/**
* @return number of Near Cache entries owned by this member
*/
long getOwnedEntryCount();
/**
* @return memory cost (number of bytes) of Near Cache entries owned by this member
*/
long getOwnedEntryMemoryCost();
/**
* @return number of hits (reads) of Near Cache entries owned by this member
*/
long getHits();
/**
* @return number of misses of Near Cache entries owned by this member
*/
long getMisses();
/**
* @return hit/miss ratio of Near Cache entries owned by this member
*/
double getRatio();
/**
* @return number of evictions of Near Cache entries owned by this member
*/
long getEvictions();
/**
* @return number of TTL and max-idle expirations of Near Cache entries owned by this member
*/
long getExpirations();
/**
* @return number of successful invalidations of Near Cache entries owned by this member
*/
long getInvalidations();
/**
* @return number of requested invalidations of Near Cache entries owned by this member.
*
* One request may cover multiple keys (e.g. {@code clear}), includes failed invalidations (e.g. where they key
* isn't contained in the Near Cache).
*/
long getInvalidationRequests();
/**
* @return the number of Near Cache key persistences (when the pre-load feature is enabled)
*/
long getPersistenceCount();
/**
* @return the timestamp of the last Near Cache key persistence (when the pre-load feature is enabled)
*/
long getLastPersistenceTime();
/**
* @return the duration in milliseconds of the last Near Cache key persistence (when the pre-load feature is enabled)
*/
long getLastPersistenceDuration();
/**
* @return the written bytes of the last Near Cache key persistence (when the pre-load feature is enabled)
*/
long getLastPersistenceWrittenBytes();
/**
* @return the number of persisted keys of the last Near Cache key persistence (when the pre-load feature is enabled)
*/
long getLastPersistenceKeyCount();
/**
* @return the failure reason of the last Near Cache persistence (when the pre-load feature is enabled)
*/
String getLastPersistenceFailure();
}