| /* |
| * 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.accumulo.manager.tableOps; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import java.io.IOException; |
| import java.math.BigInteger; |
| import java.util.Base64; |
| import java.util.SortedSet; |
| import java.util.TreeSet; |
| import java.util.concurrent.locks.Lock; |
| import java.util.concurrent.locks.ReentrantLock; |
| import java.util.function.Function; |
| |
| import org.apache.accumulo.core.Constants; |
| import org.apache.accumulo.core.clientImpl.AcceptableThriftTableOperationException; |
| import org.apache.accumulo.core.clientImpl.Namespaces; |
| import org.apache.accumulo.core.clientImpl.Tables; |
| import org.apache.accumulo.core.clientImpl.thrift.TableOperation; |
| import org.apache.accumulo.core.clientImpl.thrift.TableOperationExceptionType; |
| import org.apache.accumulo.core.data.AbstractId; |
| import org.apache.accumulo.core.data.NamespaceId; |
| import org.apache.accumulo.core.data.TableId; |
| import org.apache.accumulo.fate.zookeeper.DistributedReadWriteLock; |
| import org.apache.accumulo.fate.zookeeper.FateLock; |
| import org.apache.accumulo.fate.zookeeper.ZooReaderWriter; |
| import org.apache.accumulo.fate.zookeeper.ZooReservation; |
| import org.apache.accumulo.manager.Manager; |
| import org.apache.accumulo.server.ServerContext; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.Text; |
| import org.apache.zookeeper.KeeperException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class Utils { |
| private static final byte[] ZERO_BYTE = {'0'}; |
| private static final Logger log = LoggerFactory.getLogger(Utils.class); |
| |
| public static void checkTableDoesNotExist(ServerContext context, String tableName, |
| TableId tableId, TableOperation operation) throws AcceptableThriftTableOperationException { |
| |
| TableId id = Tables.getNameToIdMap(context).get(tableName); |
| |
| if (id != null && !id.equals(tableId)) |
| throw new AcceptableThriftTableOperationException(null, tableName, operation, |
| TableOperationExceptionType.EXISTS, null); |
| } |
| |
| public static <T extends AbstractId<T>> T getNextId(String name, ServerContext context, |
| Function<String,T> newIdFunction) throws AcceptableThriftTableOperationException { |
| try { |
| ZooReaderWriter zoo = context.getZooReaderWriter(); |
| final String ntp = context.getZooKeeperRoot() + Constants.ZTABLES; |
| byte[] nid = zoo.mutateOrCreate(ntp, ZERO_BYTE, currentValue -> { |
| BigInteger nextId = new BigInteger(new String(currentValue, UTF_8), Character.MAX_RADIX); |
| nextId = nextId.add(BigInteger.ONE); |
| return nextId.toString(Character.MAX_RADIX).getBytes(UTF_8); |
| }); |
| return newIdFunction.apply(new String(nid, UTF_8)); |
| } catch (Exception e1) { |
| log.error("Failed to assign id to " + name, e1); |
| throw new AcceptableThriftTableOperationException(null, name, TableOperation.CREATE, |
| TableOperationExceptionType.OTHER, e1.getMessage()); |
| } |
| } |
| |
| static final Lock tableNameLock = new ReentrantLock(); |
| static final Lock idLock = new ReentrantLock(); |
| |
| public static long reserveTable(Manager env, TableId tableId, long tid, boolean writeLock, |
| boolean tableMustExist, TableOperation op) throws Exception { |
| if (getLock(env.getContext(), tableId, tid, writeLock).tryLock()) { |
| if (tableMustExist) { |
| ZooReaderWriter zk = env.getContext().getZooReaderWriter(); |
| if (!zk.exists(env.getContext().getZooKeeperRoot() + Constants.ZTABLES + "/" + tableId)) |
| throw new AcceptableThriftTableOperationException(tableId.canonical(), "", op, |
| TableOperationExceptionType.NOTFOUND, "Table does not exist"); |
| } |
| log.info("table {} ({}) locked for {} operation: {}", tableId, Long.toHexString(tid), |
| (writeLock ? "write" : "read"), op); |
| return 0; |
| } else |
| return 100; |
| } |
| |
| public static void unreserveTable(Manager env, TableId tableId, long tid, boolean writeLock) { |
| getLock(env.getContext(), tableId, tid, writeLock).unlock(); |
| log.info("table {} ({}) unlocked for {}", tableId, Long.toHexString(tid), |
| (writeLock ? "write" : "read")); |
| } |
| |
| public static void unreserveNamespace(Manager env, NamespaceId namespaceId, long id, |
| boolean writeLock) { |
| getLock(env.getContext(), namespaceId, id, writeLock).unlock(); |
| log.info("namespace {} ({}) unlocked for {}", namespaceId, Long.toHexString(id), |
| (writeLock ? "write" : "read")); |
| } |
| |
| public static long reserveNamespace(Manager env, NamespaceId namespaceId, long id, |
| boolean writeLock, boolean mustExist, TableOperation op) throws Exception { |
| if (getLock(env.getContext(), namespaceId, id, writeLock).tryLock()) { |
| if (mustExist) { |
| ZooReaderWriter zk = env.getContext().getZooReaderWriter(); |
| if (!zk.exists( |
| env.getContext().getZooKeeperRoot() + Constants.ZNAMESPACES + "/" + namespaceId)) |
| throw new AcceptableThriftTableOperationException(namespaceId.canonical(), "", op, |
| TableOperationExceptionType.NAMESPACE_NOTFOUND, "Namespace does not exist"); |
| } |
| log.info("namespace {} ({}) locked for {} operation: {}", namespaceId, Long.toHexString(id), |
| (writeLock ? "write" : "read"), op); |
| return 0; |
| } else |
| return 100; |
| } |
| |
| public static long reserveHdfsDirectory(Manager env, String directory, long tid) |
| throws KeeperException, InterruptedException { |
| String resvPath = env.getContext().getZooKeeperRoot() + Constants.ZHDFS_RESERVATIONS + "/" |
| + Base64.getEncoder().encodeToString(directory.getBytes(UTF_8)); |
| |
| ZooReaderWriter zk = env.getContext().getZooReaderWriter(); |
| |
| if (ZooReservation.attempt(zk, resvPath, String.format("%016x", tid), "")) { |
| return 0; |
| } else |
| return 50; |
| } |
| |
| public static void unreserveHdfsDirectory(Manager env, String directory, long tid) |
| throws KeeperException, InterruptedException { |
| String resvPath = env.getContext().getZooKeeperRoot() + Constants.ZHDFS_RESERVATIONS + "/" |
| + Base64.getEncoder().encodeToString(directory.getBytes(UTF_8)); |
| ZooReservation.release(env.getContext().getZooReaderWriter(), resvPath, |
| String.format("%016x", tid)); |
| } |
| |
| private static Lock getLock(ServerContext context, AbstractId<?> id, long tid, |
| boolean writeLock) { |
| byte[] lockData = String.format("%016x", tid).getBytes(UTF_8); |
| var fLockPath = |
| FateLock.path(context.getZooKeeperRoot() + Constants.ZTABLE_LOCKS + "/" + id.canonical()); |
| FateLock qlock = new FateLock(context.getZooReaderWriter(), fLockPath); |
| Lock lock = DistributedReadWriteLock.recoverLock(qlock, lockData); |
| if (lock == null) { |
| DistributedReadWriteLock locker = new DistributedReadWriteLock(qlock, lockData); |
| if (writeLock) |
| lock = locker.writeLock(); |
| else |
| lock = locker.readLock(); |
| } |
| return lock; |
| } |
| |
| public static Lock getIdLock() { |
| return idLock; |
| } |
| |
| public static Lock getTableNameLock() { |
| return tableNameLock; |
| } |
| |
| public static Lock getReadLock(Manager env, AbstractId<?> id, long tid) { |
| return Utils.getLock(env.getContext(), id, tid, false); |
| } |
| |
| public static void checkNamespaceDoesNotExist(ServerContext context, String namespace, |
| NamespaceId namespaceId, TableOperation operation) |
| throws AcceptableThriftTableOperationException { |
| |
| NamespaceId n = Namespaces.lookupNamespaceId(context, namespace); |
| |
| if (n != null && !n.equals(namespaceId)) |
| throw new AcceptableThriftTableOperationException(null, namespace, operation, |
| TableOperationExceptionType.NAMESPACE_EXISTS, null); |
| } |
| |
| /** |
| * Given a fully-qualified Path and a flag indicating if the file info is base64 encoded or not, |
| * retrieve the data from a file on the file system. It is assumed that the file is textual and |
| * not binary data. |
| * |
| * @param path |
| * the fully-qualified path |
| */ |
| public static SortedSet<Text> getSortedSetFromFile(Manager manager, Path path, boolean encoded) |
| throws IOException { |
| FileSystem fs = path.getFileSystem(manager.getContext().getHadoopConf()); |
| var data = new TreeSet<Text>(); |
| try (var file = new java.util.Scanner(fs.open(path), UTF_8)) { |
| while (file.hasNextLine()) { |
| String line = file.nextLine(); |
| data.add(encoded ? new Text(Base64.getDecoder().decode(line)) : new Text(line)); |
| } |
| } |
| return data; |
| } |
| |
| } |