| /** |
| * 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 com.google.common.util.concurrent.RateLimiter; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicReference; |
| import java.util.stream.Collectors; |
| |
| import org.apache.bookkeeper.bookie.BookieShell.UpdateLedgerNotifier; |
| import org.apache.bookkeeper.client.api.LedgerMetadata; |
| import org.apache.bookkeeper.meta.LedgerManager; |
| import org.apache.bookkeeper.net.BookieId; |
| import org.apache.bookkeeper.versioning.Versioned; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Encapsulates updating the ledger metadata operation. |
| */ |
| public class UpdateLedgerOp { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(UpdateLedgerOp.class); |
| private final LedgerManager lm; |
| private final BookKeeperAdmin admin; |
| |
| public UpdateLedgerOp(final BookKeeper bkc, final BookKeeperAdmin admin) { |
| this.lm = bkc.getLedgerManager(); |
| this.admin = admin; |
| } |
| |
| /** |
| * Update the bookie id present in the ledger metadata. |
| * |
| * @param oldBookieId |
| * current bookie id |
| * @param newBookieId |
| * new bookie id |
| * @param rate |
| * number of ledgers updating per second (default 5 per sec) |
| * @param limit |
| * maximum number of ledgers to update (default: no limit). Stop |
| * update if reaching limit |
| * @param progressable |
| * report progress of the ledger updates |
| * @throws IOException |
| * if there is an error when updating bookie id in ledger |
| * metadata |
| */ |
| public void updateBookieIdInLedgers(final BookieId oldBookieId, final BookieId newBookieId, |
| final int rate, int maxOutstandingReads, final int limit, |
| final UpdateLedgerNotifier progressable) |
| throws IOException, InterruptedException { |
| |
| final AtomicInteger issuedLedgerCnt = new AtomicInteger(); |
| final AtomicInteger updatedLedgerCnt = new AtomicInteger(); |
| final CompletableFuture<Void> finalPromise = new CompletableFuture<>(); |
| final Set<CompletableFuture<?>> outstanding = |
| Collections.newSetFromMap(new ConcurrentHashMap<CompletableFuture<?>, Boolean>()); |
| final RateLimiter throttler = RateLimiter.create(rate); |
| final Semaphore outstandingReads = new Semaphore(maxOutstandingReads); |
| final Iterator<Long> ledgerItr = admin.listLedgers().iterator(); |
| |
| // iterate through all the ledgers |
| while (ledgerItr.hasNext() && !finalPromise.isDone() |
| && (limit == Integer.MIN_VALUE || issuedLedgerCnt.get() < limit)) { |
| // semaphore to control reads according to update throttling |
| outstandingReads.acquire(); |
| |
| final long ledgerId = ledgerItr.next(); |
| issuedLedgerCnt.incrementAndGet(); |
| |
| CompletableFuture<Versioned<LedgerMetadata>> writePromise = lm.readLedgerMetadata(ledgerId) |
| .thenCompose((readMetadata) -> { |
| AtomicReference<Versioned<LedgerMetadata>> ref = new AtomicReference<>(readMetadata); |
| return new MetadataUpdateLoop( |
| lm, ledgerId, |
| ref::get, |
| (metadata) -> { |
| return metadata.getAllEnsembles().values().stream() |
| .flatMap(Collection::stream) |
| .anyMatch(b -> b.equals(oldBookieId)); |
| }, |
| (metadata) -> { |
| return replaceBookieInEnsembles(metadata, oldBookieId, newBookieId); |
| }, |
| ref::compareAndSet, throttler).run(); |
| }); |
| |
| outstanding.add(writePromise); |
| writePromise.whenComplete((metadata, ex) -> { |
| if (ex != null |
| && !(ex instanceof BKException.BKNoSuchLedgerExistsOnMetadataServerException)) { |
| String error = String.format("Failed to update ledger metadata %s, replacing %s with %s", |
| ledgerId, oldBookieId, newBookieId); |
| LOG.error(error, ex); |
| finalPromise.completeExceptionally(new IOException(error, ex)); |
| } else { |
| LOG.info("Updated ledger {} metadata, replacing {} with {}", |
| ledgerId, oldBookieId, newBookieId); |
| |
| updatedLedgerCnt.incrementAndGet(); |
| progressable.progress(updatedLedgerCnt.get(), issuedLedgerCnt.get()); |
| } |
| outstandingReads.release(); |
| outstanding.remove(writePromise); |
| }); |
| } |
| |
| CompletableFuture.allOf(outstanding.stream().toArray(CompletableFuture[]::new)) |
| .whenComplete((res, ex) -> { |
| if (ex != null) { |
| finalPromise.completeExceptionally(ex); |
| } else { |
| finalPromise.complete(null); |
| } |
| }); |
| |
| try { |
| finalPromise.get(); |
| LOG.info("Total number of ledgers issued={} updated={}", |
| issuedLedgerCnt.get(), updatedLedgerCnt.get()); |
| } catch (ExecutionException e) { |
| String error = String.format("Error waiting for ledger metadata updates to complete (replacing %s with %s)", |
| oldBookieId, newBookieId); |
| LOG.info(error, e); |
| if (e.getCause() instanceof IOException) { |
| throw (IOException) e.getCause(); |
| } else { |
| throw new IOException(error, e); |
| } |
| } |
| } |
| |
| private static LedgerMetadata replaceBookieInEnsembles(LedgerMetadata metadata, |
| BookieId oldBookieId, |
| BookieId newBookieId) { |
| LedgerMetadataBuilder builder = LedgerMetadataBuilder.from(metadata); |
| for (Map.Entry<Long, ? extends List<BookieId>> e : metadata.getAllEnsembles().entrySet()) { |
| List<BookieId> newEnsemble = e.getValue().stream() |
| .map(b -> b.equals(oldBookieId) ? newBookieId : b) |
| .collect(Collectors.toList()); |
| builder.replaceEnsembleEntry(e.getKey(), newEnsemble); |
| } |
| |
| return builder.build(); |
| } |
| } |