| /** |
| * 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.meta; |
| |
| import java.io.IOException; |
| |
| import org.apache.bookkeeper.conf.AbstractConfiguration; |
| import org.apache.bookkeeper.meta.LedgerManager.LedgerRangeIterator; |
| import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.Processor; |
| import org.apache.bookkeeper.util.StringUtils; |
| import org.apache.zookeeper.AsyncCallback.VoidCallback; |
| import org.apache.zookeeper.ZooKeeper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * HierarchicalLedgerManager makes use of both LongHierarchicalLedgerManager and LegacyHierarchicalLedgerManager |
| * to extend the 31-bit ledger id range of the LegacyHierarchicalLedgerManager to that of the |
| * LongHierarchicalLedgerManager while remaining backwards-compatible with the legacy manager. |
| * |
| * <p>In order to achieve backwards-compatibility, the HierarchicalLedgerManager forwards requests relating to ledger |
| * IDs which are < Integer.MAX_INT to the LegacyHierarchicalLedgerManager. The new 5-part directory structure will not |
| * appear until a ledger with an ID >= Integer.MAX_INT is created. |
| * |
| * @see LongHierarchicalLedgerManager |
| * @see LegacyHierarchicalLedgerManager |
| */ |
| class HierarchicalLedgerManager extends AbstractHierarchicalLedgerManager { |
| static final Logger LOG = LoggerFactory.getLogger(HierarchicalLedgerManager.class); |
| |
| LegacyHierarchicalLedgerManager legacyLM; |
| LongHierarchicalLedgerManager longLM; |
| |
| public HierarchicalLedgerManager(AbstractConfiguration conf, ZooKeeper zk) { |
| super(conf, zk); |
| legacyLM = new LegacyHierarchicalLedgerManager(conf, zk); |
| longLM = new LongHierarchicalLedgerManager (conf, zk); |
| } |
| |
| @Override |
| public void asyncProcessLedgers(Processor<Long> processor, VoidCallback finalCb, Object context, int successRc, |
| int failureRc) { |
| // Process the old 31-bit id ledgers first. |
| legacyLM.asyncProcessLedgers(processor, new VoidCallback(){ |
| |
| @Override |
| public void processResult(int rc, String path, Object ctx) { |
| if (rc == failureRc) { |
| // If it fails, return the failure code to the callback |
| finalCb.processResult(rc, path, ctx); |
| } else { |
| // If it succeeds, proceed with our own recursive ledger processing for the 63-bit id ledgers |
| longLM.asyncProcessLedgers(processor, finalCb, context, successRc, failureRc); |
| } |
| } |
| |
| }, context, successRc, failureRc); |
| } |
| |
| @Override |
| protected String getLedgerPath(long ledgerId) { |
| return ledgerRootPath + StringUtils.getHybridHierarchicalLedgerPath(ledgerId); |
| } |
| |
| @Override |
| protected long getLedgerId(String ledgerPath) throws IOException { |
| if (!ledgerPath.startsWith(ledgerRootPath)) { |
| throw new IOException("it is not a valid hashed path name : " + ledgerPath); |
| } |
| String hierarchicalPath = ledgerPath.substring(ledgerRootPath.length() + 1); |
| return StringUtils.stringToLongHierarchicalLedgerId(hierarchicalPath); |
| } |
| |
| @Override |
| public LedgerRangeIterator getLedgerRanges(long zkOpTimeoutMs) { |
| LedgerRangeIterator legacyLedgerRangeIterator = legacyLM.getLedgerRanges(zkOpTimeoutMs); |
| LedgerRangeIterator longLedgerRangeIterator = longLM.getLedgerRanges(zkOpTimeoutMs); |
| return new HierarchicalLedgerRangeIterator(legacyLedgerRangeIterator, longLedgerRangeIterator); |
| } |
| |
| private static class HierarchicalLedgerRangeIterator implements LedgerRangeIterator { |
| |
| LedgerRangeIterator legacyLedgerRangeIterator; |
| LedgerRangeIterator longLedgerRangeIterator; |
| |
| HierarchicalLedgerRangeIterator(LedgerRangeIterator legacyLedgerRangeIterator, |
| LedgerRangeIterator longLedgerRangeIterator) { |
| this.legacyLedgerRangeIterator = legacyLedgerRangeIterator; |
| this.longLedgerRangeIterator = longLedgerRangeIterator; |
| } |
| |
| @Override |
| public boolean hasNext() throws IOException { |
| return legacyLedgerRangeIterator.hasNext() || longLedgerRangeIterator.hasNext(); |
| } |
| |
| @Override |
| public LedgerRange next() throws IOException { |
| if (legacyLedgerRangeIterator.hasNext()) { |
| return legacyLedgerRangeIterator.next(); |
| } |
| return longLedgerRangeIterator.next(); |
| } |
| |
| } |
| |
| @Override |
| protected String getLedgerParentNodeRegex() { |
| return StringUtils.HIERARCHICAL_LEDGER_PARENT_NODE_REGEX; |
| } |
| } |