| /* |
| * 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.bookkeeper.bookie.storage.ldb; |
| |
| import static org.apache.bookkeeper.bookie.BookKeeperServerStats.BOOKIE_SCOPE; |
| import static org.apache.bookkeeper.bookie.BookKeeperServerStats.CATEGORY_SERVER; |
| |
| import java.util.function.Supplier; |
| import lombok.Getter; |
| import org.apache.bookkeeper.stats.Gauge; |
| import org.apache.bookkeeper.stats.StatsLogger; |
| import org.apache.bookkeeper.stats.annotations.StatsDoc; |
| |
| /** |
| * A umbrella class for ledger metadata index stats. |
| */ |
| @StatsDoc( |
| name = BOOKIE_SCOPE, |
| category = CATEGORY_SERVER, |
| help = "Ledger metadata index stats" |
| ) |
| @Getter |
| class LedgerMetadataIndexStats { |
| |
| private static final String LEDGERS_COUNT = "ledgers-count"; |
| |
| @StatsDoc( |
| name = LEDGERS_COUNT, |
| help = "Current number of ledgers" |
| ) |
| private final Gauge<Long> ledgersCountGauge; |
| |
| LedgerMetadataIndexStats(StatsLogger statsLogger, |
| Supplier<Long> ledgersCountSupplier) { |
| ledgersCountGauge = new Gauge<Long>() { |
| @Override |
| public Long getDefaultValue() { |
| return 0L; |
| } |
| |
| @Override |
| public Long getSample() { |
| return ledgersCountSupplier.get(); |
| } |
| }; |
| statsLogger.registerGauge(LEDGERS_COUNT, ledgersCountGauge); |
| } |
| |
| } |