modules/core/src/main/java/org/apache/ignite/internal/client/GridClientDataMetrics.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.internal.client;

import java.io.Serializable;

/**
 * Cache metrics used to obtain statistics on cache itself or any of its entries.
 * Cache metrics can be fetched from server either for the whole cache or for
 * specific entry via any of the {@code metrics(...)} methods available on
 * {@link GridClientData} API.
 */
public interface GridClientDataMetrics extends Serializable {
    /**
     * Gets create time of the owning entity (either cache or entry).
     *
     * @return Create time.
     */
    public long createTime();

    /**
     * Gets last write time of the owning entity (either cache or entry).
     *
     * @return Last write time.
     */
    public long writeTime();

    /**
     * Gets last read time of the owning entity (either cache or entry).
     *
     * @return Last read time.
     */
    public long readTime();

    /**
     * Gets total number of reads of the owning entity (either cache or entry).
     *
     * @return Total number of reads.
     */
    public int reads();

    /**
     * Gets total number of writes of the owning entity (either cache or entry).
     *
     * @return Total number of writes.
     */
    public int writes();

    /**
     * Gets total number of hits for the owning entity (either cache or entry).
     *
     * @return Number of hits.
     */
    public int hits();

    /**
     * Gets total number of misses for the owning entity (either cache or entry).
     *
     * @return Number of misses.
     */
    public int misses();
}