| /** |
| * 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.hadoop.contrib.bkjournal; |
| |
| import static org.junit.Assert.*; |
| |
| import java.net.URI; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.zookeeper.ZooKeeper; |
| import org.apache.zookeeper.Watcher; |
| import org.apache.zookeeper.WatchedEvent; |
| import org.apache.zookeeper.KeeperException; |
| |
| import org.apache.bookkeeper.proto.BookieServer; |
| import org.apache.bookkeeper.conf.ServerConfiguration; |
| import org.apache.bookkeeper.util.LocalBookKeeper; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.List; |
| |
| import java.io.IOException; |
| import java.io.File; |
| |
| /** |
| * Utility class for setting up bookkeeper ensembles |
| * and bringing individual bookies up and down |
| */ |
| class BKJMUtil { |
| protected static final Log LOG = LogFactory.getLog(BKJMUtil.class); |
| |
| int nextPort = 6000; // next port for additionally created bookies |
| private Thread bkthread = null; |
| private final static String zkEnsemble = "127.0.0.1:2181"; |
| int numBookies; |
| |
| BKJMUtil(final int numBookies) throws Exception { |
| this.numBookies = numBookies; |
| |
| bkthread = new Thread() { |
| public void run() { |
| try { |
| String[] args = new String[1]; |
| args[0] = String.valueOf(numBookies); |
| LOG.info("Starting bk"); |
| LocalBookKeeper.main(args); |
| } catch (InterruptedException e) { |
| // go away quietly |
| } catch (Exception e) { |
| LOG.error("Error starting local bk", e); |
| } |
| } |
| }; |
| } |
| |
| void start() throws Exception { |
| bkthread.start(); |
| if (!LocalBookKeeper.waitForServerUp(zkEnsemble, 10000)) { |
| throw new Exception("Error starting zookeeper/bookkeeper"); |
| } |
| assertEquals("Not all bookies started", |
| numBookies, checkBookiesUp(numBookies, 10)); |
| } |
| |
| void teardown() throws Exception { |
| if (bkthread != null) { |
| bkthread.interrupt(); |
| bkthread.join(); |
| } |
| } |
| |
| static ZooKeeper connectZooKeeper() |
| throws IOException, KeeperException, InterruptedException { |
| final CountDownLatch latch = new CountDownLatch(1); |
| |
| ZooKeeper zkc = new ZooKeeper(zkEnsemble, 3600, new Watcher() { |
| public void process(WatchedEvent event) { |
| if (event.getState() == Watcher.Event.KeeperState.SyncConnected) { |
| latch.countDown(); |
| } |
| } |
| }); |
| if (!latch.await(3, TimeUnit.SECONDS)) { |
| throw new IOException("Zookeeper took too long to connect"); |
| } |
| return zkc; |
| } |
| |
| static URI createJournalURI(String path) throws Exception { |
| return URI.create("bookkeeper://" + zkEnsemble + path); |
| } |
| |
| static void addJournalManagerDefinition(Configuration conf) { |
| conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_PLUGIN_PREFIX + ".bookkeeper", |
| "org.apache.hadoop.contrib.bkjournal.BookKeeperJournalManager"); |
| } |
| |
| BookieServer newBookie() throws Exception { |
| int port = nextPort++; |
| ServerConfiguration bookieConf = new ServerConfiguration(); |
| bookieConf.setBookiePort(port); |
| File tmpdir = File.createTempFile("bookie" + Integer.toString(port) + "_", |
| "test"); |
| tmpdir.delete(); |
| tmpdir.mkdir(); |
| |
| bookieConf.setZkServers(zkEnsemble); |
| bookieConf.setJournalDirName(tmpdir.getPath()); |
| bookieConf.setLedgerDirNames(new String[] { tmpdir.getPath() }); |
| |
| BookieServer b = new BookieServer(bookieConf); |
| b.start(); |
| for (int i = 0; i < 10 && !b.isRunning(); i++) { |
| Thread.sleep(10000); |
| } |
| if (!b.isRunning()) { |
| throw new IOException("Bookie would not start"); |
| } |
| return b; |
| } |
| |
| /** |
| * Check that a number of bookies are available |
| * @param count number of bookies required |
| * @param timeout number of seconds to wait for bookies to start |
| * @throws IOException if bookies are not started by the time the timeout hits |
| */ |
| int checkBookiesUp(int count, int timeout) throws Exception { |
| ZooKeeper zkc = connectZooKeeper(); |
| try { |
| boolean up = false; |
| int mostRecentSize = 0; |
| for (int i = 0; i < timeout; i++) { |
| try { |
| List<String> children = zkc.getChildren("/ledgers/available", |
| false); |
| mostRecentSize = children.size(); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Found " + mostRecentSize + " bookies up, " |
| + "waiting for " + count); |
| if (LOG.isTraceEnabled()) { |
| for (String child : children) { |
| LOG.trace(" server: " + child); |
| } |
| } |
| } |
| if (mostRecentSize == count) { |
| up = true; |
| break; |
| } |
| } catch (KeeperException e) { |
| // ignore |
| } |
| Thread.sleep(1000); |
| } |
| return mostRecentSize; |
| } finally { |
| zkc.close(); |
| } |
| } |
| } |