bookkeeper-server/src/test/java/org/apache/bookkeeper/client/TestWatchEnsembleChange.java

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 * 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
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package org.apache.bookkeeper.client;

import org.apache.bookkeeper.client.BookKeeper.DigestType;
import org.apache.bookkeeper.meta.FlatLedgerManagerFactory;
import org.apache.bookkeeper.meta.HierarchicalLedgerManagerFactory;
import org.apache.bookkeeper.meta.LedgerManager;
import org.apache.bookkeeper.meta.LedgerManagerFactory;
import org.apache.bookkeeper.meta.MSLedgerManagerFactory;
import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks;
import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.LedgerMetadataListener;
import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
import org.apache.bookkeeper.util.ReflectionUtils;
import org.apache.bookkeeper.versioning.Version;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

@RunWith(Parameterized.class)
public class TestWatchEnsembleChange extends BookKeeperClusterTestCase {

    static Logger LOG = LoggerFactory.getLogger(TestWatchEnsembleChange.class);

    final DigestType digestType;
    final Class<? extends LedgerManagerFactory> lmFactoryCls;

    public TestWatchEnsembleChange(Class<? extends LedgerManagerFactory> lmFactoryCls) {
        super(7);
        this.digestType = DigestType.CRC32;
        this.lmFactoryCls = lmFactoryCls;
        baseClientConf.setLedgerManagerFactoryClass(lmFactoryCls);
        baseConf.setLedgerManagerFactoryClass(lmFactoryCls);
    }
    
    @Parameters
    public static Collection<Object[]> configs() {
        return Arrays.asList(new Object[][] {
            { FlatLedgerManagerFactory.class },
            { HierarchicalLedgerManagerFactory.class },
            { MSLedgerManagerFactory.class }
        });
    }

    @Test(timeout = 60000)
    public void testWatchEnsembleChange() throws Exception {
        int numEntries = 10;
        LedgerHandle lh = bkc.createLedger(3, 3, 3, digestType, "".getBytes());
        for (int i=0; i<numEntries; i++) {
            lh.addEntry(("data" + i).getBytes());
            LOG.info("Added entry {}.", i);
        }
        LedgerHandle readLh = bkc.openLedgerNoRecovery(lh.getId(), digestType, "".getBytes());
        long lastLAC = readLh.getLastAddConfirmed();
        assertEquals(numEntries - 2, lastLAC);
        ArrayList<InetSocketAddress> ensemble =
                lh.getLedgerMetadata().currentEnsemble;
        for (InetSocketAddress addr : ensemble) {
            killBookie(addr);
        }
        // write another batch of entries, which will trigger ensemble change
        for (int i=0; i<numEntries; i++) {
            lh.addEntry(("data" + (numEntries + i)).getBytes());
            LOG.info("Added entry {}.", (numEntries + i));
        }
        TimeUnit.SECONDS.sleep(5);
        readLh.readLastConfirmed();
        assertEquals(2 * numEntries - 2, readLh.getLastAddConfirmed());
        readLh.close();
        lh.close();
    }

    @Test(timeout = 60000)
    public void testWatchMetadataRemoval() throws Exception {
       LedgerManagerFactory factory = ReflectionUtils.newInstance(lmFactoryCls);
       factory.initialize(baseConf, super.zkc, factory.getCurrentVersion());
       LedgerManager manager = factory.newLedgerManager();
       final ByteBuffer bbLedgerId = ByteBuffer.allocate(8);
       final CountDownLatch createLatch = new CountDownLatch(1);
       final CountDownLatch removeLatch = new CountDownLatch(1);
       
       manager.createLedger( new LedgerMetadata(4, 2, 2, digestType, "fpj was here".getBytes()), 
                new BookkeeperInternalCallbacks.GenericCallback<Long>(){
          
           @Override
           public void operationComplete(int rc, Long result) {
               bbLedgerId.putLong(result);
               bbLedgerId.flip();
               createLatch.countDown();
           }
       }); 
       assertTrue(createLatch.await(2000, TimeUnit.MILLISECONDS));
       final long createdLid = bbLedgerId.getLong();
       
       manager.registerLedgerMetadataListener( createdLid, 
               new LedgerMetadataListener() {

           @Override
           public void onChanged( long ledgerId, LedgerMetadata metadata ) {
               assertEquals(ledgerId, createdLid);
               assertEquals(metadata, null);
               removeLatch.countDown();
           }   
       });
       
       manager.removeLedgerMetadata( createdLid, Version.ANY,
               new BookkeeperInternalCallbacks.GenericCallback<Void>() {
           
           @Override
           public void operationComplete(int rc, Void result) {
               assertEquals(rc, BKException.Code.OK);
           }
       });
       assertTrue(removeLatch.await(2000, TimeUnit.MILLISECONDS));   
    }
}