modules/core/src/main/java/org/apache/ignite/internal/metric/IoStatisticsHolder.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.metric;

/**
 * Holder of IO statistics.
 */
public interface IoStatisticsHolder {
    /**
     * Track logical read of given page.
     *
     * @param pageAddr Address of page.
     */
    public void trackLogicalRead(long pageAddr);

    /**
     * Track physical and logical read of given page.
     *
     * @param pageAddr start address of page.
     */
    public void trackPhysicalAndLogicalRead(long pageAddr);

    /**
     * @return Number of logical reads.
     */
    public long logicalReads();

    /**
     * @return Number of physical reads.
     */
    public long physicalReads();

    /**
     * @return Metric registry name.
     */
    public String metricRegistryName();
}