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.
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*/
import java.io.File;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Random;
import java.util.Set;
import org.apache.bookkeeper.client.AsyncCallback.AddCallback;
import org.apache.bookkeeper.client.BKException;
import org.apache.bookkeeper.client.BookKeeper;
import org.apache.bookkeeper.client.LedgerEntry;
import org.apache.bookkeeper.client.LedgerHandle;
import org.apache.bookkeeper.client.AsyncCallback.ReadCallback;
import org.apache.bookkeeper.client.BookKeeper.DigestType;
import org.apache.bookkeeper.proto.BookieServer;
import org.apache.log4j.Logger;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.junit.Before;
import org.junit.Test;
/**
* This test tests read and write, synchronous and asynchronous, strings and
* integers for a BookKeeper client. The test deployment uses a ZooKeeper server
* and three BookKeepers.
*
*/
public class BookieFailureTest extends BaseTestCase implements AddCallback, ReadCallback {
// Depending on the taste, select the amount of logging
// by decommenting one of the two lines below
// static Logger LOG = Logger.getRootLogger();
static Logger LOG = Logger.getLogger(BookieFailureTest.class);
byte[] ledgerPassword = "aaa".getBytes();
LedgerHandle lh, lh2;
long ledgerId;
Enumeration<LedgerEntry> ls;
// test related variables
int numEntriesToWrite = 200;
int maxInt = 2147483647;
Random rng; // Random Number Generator
ArrayList<byte[]> entries; // generated entries
ArrayList<Integer> entriesSize;
DigestType digestType;
// Synchronization
SyncObj sync;
Set<Object> syncObjs;
class SyncObj {
int counter;
boolean value;
public SyncObj() {
counter = 0;
value = false;
}
}
public BookieFailureTest(DigestType digestType) {
super(4);
this.digestType = digestType;
}
/**
* Tests writes and reads when a bookie fails.
*
* @throws {@link IOException}
*/
@Test
public void testAsyncBK1() throws IOException {
LOG.info("#### BK1 ####");
auxTestReadWriteAsyncSingleClient(bs.get(0));
}
@Test
public void testAsyncBK2() throws IOException {
LOG.info("#### BK2 ####");
auxTestReadWriteAsyncSingleClient(bs.get(1));
}
@Test
public void testAsyncBK3() throws IOException {
LOG.info("#### BK3 ####");
auxTestReadWriteAsyncSingleClient(bs.get(2));
}
@Test
public void testAsyncBK4() throws IOException {
LOG.info("#### BK4 ####");
auxTestReadWriteAsyncSingleClient(bs.get(3));
}
@Test
public void testBookieRecovery() throws Exception{
bkc = new BookKeeper("127.0.0.1");
//Shutdown all but 1 bookie
bs.get(0).shutdown();
bs.get(1).shutdown();
bs.get(2).shutdown();
byte[] passwd = "blah".getBytes();
LedgerHandle lh = bkc.createLedger(1, 1,digestType, passwd);
int numEntries = 100;
for (int i=0; i< numEntries; i++){
byte[] data = (""+i).getBytes();
lh.addEntry(data);
}
bs.get(3).shutdown();
BookieServer server = new BookieServer(initialPort + 3, HOSTPORT, tmpDirs.get(3), new File[] { tmpDirs.get(3)});
server.start();
bs.set(3, server);
assertEquals(numEntries - 1 , lh.getLastAddConfirmed());
Enumeration<LedgerEntry> entries = lh.readEntries(0, lh.getLastAddConfirmed());
int numScanned = 0;
while (entries.hasMoreElements()){
assertEquals((""+numScanned), new String(entries.nextElement().getEntry()));
numScanned++;
}
assertEquals(numEntries, numScanned);
}
void auxTestReadWriteAsyncSingleClient(BookieServer bs) throws IOException {
try {
// Create a BookKeeper client and a ledger
lh = bkc.createLedger(3, 2, digestType, ledgerPassword);
ledgerId = lh.getId();
LOG.info("Ledger ID: " + lh.getId());
for (int i = 0; i < numEntriesToWrite; i++) {
ByteBuffer entry = ByteBuffer.allocate(4);
entry.putInt(rng.nextInt(maxInt));
entry.position(0);
entries.add(entry.array());
entriesSize.add(entry.array().length);
lh.asyncAddEntry(entry.array(), this, sync);
}
LOG.info("Wrote " + numEntriesToWrite + " and now going to fail bookie.");
// Bookie fail
bs.shutdown();
// wait for all entries to be acknowledged
synchronized (sync) {
while (sync.counter < numEntriesToWrite) {
LOG.debug("Entries counter = " + sync.counter);
sync.wait();
}
}
LOG.debug("*** WRITE COMPLETE ***");
// close ledger
lh.close();
// *** WRITING PART COMPLETE // READ PART BEGINS ***
// open ledger
bkc.halt();
bkc = new BookKeeper("127.0.0.1");
lh = bkc.openLedger(ledgerId, digestType, ledgerPassword);
LOG.debug("Number of entries written: " + (lh.getLastAddConfirmed() + 1));
assertTrue("Verifying number of entries written", lh.getLastAddConfirmed() == (numEntriesToWrite - 1));
// read entries
lh.asyncReadEntries(0, numEntriesToWrite - 1, this, sync);
synchronized (sync) {
while (sync.value == false) {
sync.wait(10000);
assertTrue("Haven't received entries", sync.value);
}
}
LOG.debug("*** READ COMPLETE ***");
// at this point, LedgerSequence ls is filled with the returned
// values
int i = 0;
while (ls.hasMoreElements()) {
ByteBuffer origbb = ByteBuffer.wrap(entries.get(i));
Integer origEntry = origbb.getInt();
byte[] entry = ls.nextElement().getEntry();
ByteBuffer result = ByteBuffer.wrap(entry);
Integer retrEntry = result.getInt();
LOG.debug("Retrieved entry: " + i);
assertTrue("Checking entry " + i + " for equality", origEntry.equals(retrEntry));
assertTrue("Checking entry " + i + " for size", entry.length == entriesSize.get(i).intValue());
i++;
}
assertTrue("Checking number of read entries", i == numEntriesToWrite);
LOG.info("Verified that entries are ok, and now closing ledger");
lh.close();
} catch (KeeperException e) {
LOG.error("Caught KeeperException", e);
fail(e.toString());
} catch (BKException e) {
LOG.error("Caught BKException", e);
fail(e.toString());
} catch (InterruptedException e) {
LOG.error("Caught InterruptedException", e);
fail(e.toString());
}
}
public void addComplete(int rc, LedgerHandle lh, long entryId, Object ctx) {
if (rc != 0)
fail("Failed to write entry: " + entryId);
SyncObj x = (SyncObj) ctx;
synchronized (x) {
x.counter++;
x.notify();
}
}
public void readComplete(int rc, LedgerHandle lh, Enumeration<LedgerEntry> seq, Object ctx) {
if (rc != 0)
fail("Failed to write entry");
ls = seq;
synchronized (sync) {
sync.value = true;
sync.notify();
}
}
@Before
@Override
public void setUp() throws Exception {
super.setUp();
rng = new Random(System.currentTimeMillis()); // Initialize the Random
// Number Generator
entries = new ArrayList<byte[]>(); // initialize the entries list
entriesSize = new ArrayList<Integer>();
sync = new SyncObj(); // initialize the synchronization data structure
zkc.close();
}
/* Clean up a directory recursively */
@Override
protected boolean cleanUpDir(File dir) {
if (dir.isDirectory()) {
LOG.info("Cleaning up " + dir.getName());
String[] children = dir.list();
for (String string : children) {
boolean success = cleanUpDir(new File(dir, string));
if (!success)
return false;
}
}
// The directory is now empty so delete it
return dir.delete();
}
/* User for testing purposes, void */
class emptyWatcher implements Watcher {
public void process(WatchedEvent event) {
}
}
}