Java tutorial
package org.apache.bookkeeper.test; /* * * 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. * */ import static org.apache.bookkeeper.util.ClientBase.CONNECTION_TIMEOUT; import java.lang.InterruptedException; import java.io.File; import java.io.IOException; import java.nio.ByteBuffer; import junit.framework.TestCase; import org.junit.*; import org.apache.bookkeeper.client.BKException; import org.apache.bookkeeper.client.BookKeeper; import org.apache.bookkeeper.client.LedgerHandle; import org.apache.bookkeeper.proto.BookieServer; import org.apache.bookkeeper.util.ClientBase; import org.apache.log4j.Logger; import org.apache.zookeeper.server.NIOServerCnxn; import org.apache.zookeeper.server.ZooKeeperServer; import org.apache.zookeeper.server.ServerStats; import org.apache.zookeeper.KeeperException; import org.apache.zookeeper.CreateMode; import org.apache.zookeeper.ZooDefs.Ids; import org.apache.zookeeper.Watcher; import org.apache.zookeeper.WatchedEvent; import org.apache.zookeeper.ZooKeeper; /** * This unit test tests closing ledgers sequentially. * It creates 4 ledgers, then write 1000 entries to each * ledger and close it. * */ public class CloseTest extends TestCase implements Watcher { static Logger LOG = Logger.getLogger(LedgerRecoveryTest.class); BookieServer bs1, bs2, bs3; File tmpDir1, tmpDir2, tmpDir3, tmpDirZK; private static final String HOSTPORT = "127.0.0.1:33299"; private NIOServerCnxn.Factory serverFactory; private static String BOOKIEADDR1 = "127.0.0.1:33300"; private static String BOOKIEADDR2 = "127.0.0.1:33301"; private static String BOOKIEADDR3 = "127.0.0.1:33302"; private static void recursiveDelete(File dir) { File children[] = dir.listFiles(); if (children != null) { for (File child : children) { recursiveDelete(child); } } dir.delete(); } protected void setUp() throws Exception { /* * Creates 3 BookieServers */ tmpDir1 = File.createTempFile("bookie1", "test"); tmpDir1.delete(); tmpDir1.mkdir(); final int PORT1 = Integer.parseInt(BOOKIEADDR1.split(":")[1]); bs1 = new BookieServer(PORT1, tmpDir1, new File[] { tmpDir1 }); bs1.start(); tmpDir2 = File.createTempFile("bookie2", "test"); tmpDir2.delete(); tmpDir2.mkdir(); final int PORT2 = Integer.parseInt(BOOKIEADDR2.split(":")[1]); bs2 = new BookieServer(PORT2, tmpDir2, new File[] { tmpDir2 }); bs2.start(); tmpDir3 = File.createTempFile("bookie3", "test"); tmpDir3.delete(); tmpDir3.mkdir(); final int PORT3 = Integer.parseInt(BOOKIEADDR3.split(":")[1]); bs3 = new BookieServer(PORT3, tmpDir3, new File[] { tmpDir3 }); bs3.start(); /* * Instantiates a ZooKeeper server. This is a blind copy * of setUp from SessionTest.java. */ LOG.info("STARTING " + getName()); //ServerStats.registerAsConcrete(); tmpDirZK = ClientBase.createTmpDir(); ClientBase.setupTestEnv(); ZooKeeperServer zs = new ZooKeeperServer(tmpDirZK, tmpDirZK, 3000); final int PORT = Integer.parseInt(HOSTPORT.split(":")[1]); serverFactory = new NIOServerCnxn.Factory(PORT); serverFactory.startup(zs); assertTrue("waiting for server up", ClientBase.waitForServerUp(HOSTPORT, CONNECTION_TIMEOUT)); /* * Creating necessary znodes */ try { ZooKeeper zk = new ZooKeeper(HOSTPORT, 3000, this); zk.create("/ledgers", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); zk.create("/ledgers/available", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); zk.create("/ledgers/available/" + BOOKIEADDR1, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); zk.create("/ledgers/available/" + BOOKIEADDR2, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); zk.create("/ledgers/available/" + BOOKIEADDR3, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); zk.close(); } catch (KeeperException ke) { LOG.error(ke); fail("Couldn't execute ZooKeeper start procedure"); } } /** * Watcher method. */ synchronized public void process(WatchedEvent event) { LOG.info("Process: " + event.getType() + " " + event.getPath()); } protected void tearDown() throws Exception { LOG.info("### Tear down ###"); bs1.shutdown(); recursiveDelete(tmpDir1); bs2.shutdown(); recursiveDelete(tmpDir2); bs3.shutdown(); recursiveDelete(tmpDir3); serverFactory.shutdown(); assertTrue("waiting for server down", ClientBase.waitForServerDown(HOSTPORT, CONNECTION_TIMEOUT)); //ServerStats.unregister(); recursiveDelete(tmpDirZK); LOG.info("FINISHED " + getName()); } @Test public void testClose() { /* * Instantiate BookKeeper object. */ BookKeeper bk = null; try { bk = new BookKeeper(HOSTPORT); } catch (KeeperException ke) { LOG.error("Error instantiating BookKeeper", ke); fail("ZooKeeper error"); } catch (IOException ioe) { LOG.error(ioe); fail("Failure due to IOException"); } /* * Create 4 ledgers. */ LedgerHandle lh1 = null; LedgerHandle lh2 = null; LedgerHandle lh3 = null; LedgerHandle lh4 = null; try { lh1 = bk.createLedger("".getBytes()); lh2 = bk.createLedger("".getBytes()); lh3 = bk.createLedger("".getBytes()); lh4 = bk.createLedger("".getBytes()); } catch (KeeperException ke) { LOG.error("Error creating a ledger", ke); fail("ZooKeeper error"); } catch (BKException bke) { LOG.error("BookKeeper error"); fail("BookKeeper error"); } catch (InterruptedException ie) { LOG.error(ie); fail("Failure due to interrupted exception"); } catch (IOException ioe) { LOG.error(ioe); fail("Failure due to IO exception"); } /* * Write a 1000 entries to lh1. */ try { String tmp = "BookKeeper is cool!"; for (int i = 0; i < 1000; i++) { lh1.addEntry(tmp.getBytes()); } } catch (InterruptedException e) { LOG.error("Interrupted when adding entry", e); fail("Couldn't finish adding entries"); } catch (BKException e) { LOG.error("BookKeeper exception", e); fail("BookKeeper exception when adding entries"); } try { lh1.close(); } catch (Exception e) { LOG.error(e); fail("Exception while closing ledger 1"); } /* * Write a 1000 entries to lh2. */ try { String tmp = "BookKeeper is cool!"; for (int i = 0; i < 1000; i++) { lh2.addEntry(tmp.getBytes()); } } catch (InterruptedException e) { LOG.error("Interrupted when adding entry", e); fail("Couldn't finish adding entries"); } catch (BKException e) { LOG.error("BookKeeper exception", e); fail("CBookKeeper exception while adding entries"); } try { lh2.close(); } catch (Exception e) { LOG.error(e); fail("Exception while closing ledger 2"); } /* * Write a 1000 entries to lh3 and lh4. */ try { String tmp = "BookKeeper is cool!"; for (int i = 0; i < 1000; i++) { lh3.addEntry(tmp.getBytes()); lh4.addEntry(tmp.getBytes()); } } catch (InterruptedException e) { LOG.error("Interrupted when adding entry", e); fail("Couldn't finish adding entries"); } catch (BKException e) { LOG.error("BookKeeper exception", e); fail("BookKeeper exception when adding entries"); } try { lh3.close(); lh4.close(); } catch (Exception e) { LOG.error(e); fail("Exception while closing ledger 4"); } } }