| /* |
| * 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; |
| |
| /** |
| * This interface provides calculated metrics for data region. |
| */ |
| public interface DataRegionMetricsProvider { |
| /** |
| * Calculates free space of partially filled pages for this data region. It does not include |
| * empty data pages. |
| * |
| * @return free space in bytes. |
| */ |
| public long partiallyFilledPagesFreeSpace(); |
| |
| /** |
| * Calculates empty data pages count for region. It counts only totally free pages that |
| * can be reused (e. g. pages that are contained in reuse bucket of free list). |
| * |
| * @return empty data pages count. |
| */ |
| public long emptyDataPages(); |
| } |