| /** |
| * 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.client; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.SortedMap; |
| import org.apache.bookkeeper.client.api.LedgerMetadata; |
| import org.apache.bookkeeper.net.BookieSocketAddress; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Utilities for working with ledger metadata. |
| */ |
| public class LedgerMetadataUtils { |
| static final Logger LOG = LoggerFactory.getLogger(LedgerMetadataUtils.class); |
| |
| static List<BookieSocketAddress> getCurrentEnsemble(LedgerMetadata metadata) { |
| return getLastEnsembleValue(metadata); |
| } |
| |
| /** |
| * the entry id greater than the given entry-id at which the next ensemble change takes |
| * place. |
| * |
| * @param entryId |
| * @return the entry id of the next ensemble change (-1 if no further ensemble changes) |
| */ |
| static long getNextEnsembleChange(LedgerMetadata metadata, long entryId) { |
| SortedMap<Long, ? extends List<BookieSocketAddress>> tailMap = metadata.getAllEnsembles().tailMap(entryId + 1); |
| |
| if (tailMap.isEmpty()) { |
| return -1; |
| } else { |
| return tailMap.firstKey(); |
| } |
| } |
| |
| static Set<BookieSocketAddress> getBookiesInThisLedger(LedgerMetadata metadata) { |
| Set<BookieSocketAddress> bookies = new HashSet<BookieSocketAddress>(); |
| for (List<BookieSocketAddress> ensemble : metadata.getAllEnsembles().values()) { |
| bookies.addAll(ensemble); |
| } |
| return bookies; |
| } |
| |
| static List<BookieSocketAddress> getLastEnsembleValue(LedgerMetadata metadata) { |
| checkArgument(!metadata.getAllEnsembles().isEmpty(), "Metadata should never be created with no ensembles"); |
| return metadata.getAllEnsembles().lastEntry().getValue(); |
| } |
| |
| static Long getLastEnsembleKey(LedgerMetadata metadata) { |
| checkArgument(!metadata.getAllEnsembles().isEmpty(), "Metadata should never be created with no ensembles"); |
| return metadata.getAllEnsembles().lastKey(); |
| } |
| |
| public static boolean shouldStoreCtime(LedgerMetadata metadata) { |
| return metadata instanceof LedgerMetadataImpl && ((LedgerMetadataImpl) metadata).shouldStoreCtime(); |
| } |
| } |