| /* |
| * |
| * 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.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.bookkeeper.client.api.LedgerMetadata; |
| import org.apache.bookkeeper.net.BookieSocketAddress; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| class EnsembleUtils { |
| private static final Logger LOG = LoggerFactory.getLogger(EnsembleUtils.class); |
| |
| static List<BookieSocketAddress> replaceBookiesInEnsemble(BookieWatcher bookieWatcher, |
| LedgerMetadata metadata, |
| List<BookieSocketAddress> oldEnsemble, |
| Map<Integer, BookieSocketAddress> failedBookies, |
| String logContext) |
| throws BKException.BKNotEnoughBookiesException { |
| List<BookieSocketAddress> newEnsemble = new ArrayList<>(oldEnsemble); |
| |
| int ensembleSize = metadata.getEnsembleSize(); |
| int writeQ = metadata.getWriteQuorumSize(); |
| int ackQ = metadata.getAckQuorumSize(); |
| Map<String, byte[]> customMetadata = metadata.getCustomMetadata(); |
| |
| Set<BookieSocketAddress> exclude = new HashSet<>(failedBookies.values()); |
| |
| int replaced = 0; |
| for (Map.Entry<Integer, BookieSocketAddress> entry : failedBookies.entrySet()) { |
| int idx = entry.getKey(); |
| BookieSocketAddress addr = entry.getValue(); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("{} replacing bookie: {} index: {}", logContext, addr, idx); |
| } |
| |
| if (!newEnsemble.get(idx).equals(addr)) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("{} Not changing failed bookie {} at index {}, already changed to {}", |
| logContext, addr, idx, newEnsemble.get(idx)); |
| } |
| continue; |
| } |
| try { |
| BookieSocketAddress newBookie = bookieWatcher.replaceBookie( |
| ensembleSize, writeQ, ackQ, customMetadata, newEnsemble, idx, exclude); |
| newEnsemble.set(idx, newBookie); |
| |
| replaced++; |
| } catch (BKException.BKNotEnoughBookiesException e) { |
| // if there is no bookie replaced, we throw not enough bookie exception |
| if (replaced <= 0) { |
| throw e; |
| } else { |
| break; |
| } |
| } |
| } |
| return newEnsemble; |
| } |
| |
| static Set<Integer> diffEnsemble(List<BookieSocketAddress> e1, |
| List<BookieSocketAddress> e2) { |
| checkArgument(e1.size() == e2.size(), "Ensembles must be of same size"); |
| Set<Integer> diff = new HashSet<>(); |
| for (int i = 0; i < e1.size(); i++) { |
| if (!e1.get(i).equals(e2.get(i))) { |
| diff.add(i); |
| } |
| } |
| return diff; |
| } |
| } |