Java FileTxnSnapLog類代碼示例

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
/**
 * 啟動偽集群模式
 * @param config
 * @throws IOException
 * @throws InterruptedException
 * @throws ConfigException
 */
public void startFakeCluster(QuorumPeerConfig config) throws IOException{

	ServerCnxnFactory cnxnFactory = new NIOServerCnxnFactory();
	cnxnFactory.configure(config.getClientPortAddress(), config.getMaxClientCnxns());

	QuorumPeer quorumPeer = new QuorumPeer(config.getServers(), config.getDataDir(), config.getDataLogDir(), config.getElectionAlg(), config.getServerId(), config.getTickTime(), config.getInitLimit(), config.getSyncLimit(), config.getQuorumListenOnAllIPs(), cnxnFactory, config.getQuorumVerifier());
	quorumPeer.setClientAddress(config.getClientPortAddress());
	quorumPeer.setTxnFactory(new FileTxnSnapLog(config.getDataLogDir(), config.getDataDir()));
	quorumPeer.setElectionType(config.getElectionAlg());
	quorumPeer.setMyid(config.getServerId());
	quorumPeer.setTickTime(config.getTickTime());
	quorumPeer.setMinSessionTimeout(config.getMinSessionTimeout());
	quorumPeer.setMaxSessionTimeout(config.getMaxSessionTimeout());
	quorumPeer.setInitLimit(config.getInitLimit());
	quorumPeer.setSyncLimit(config.getSyncLimit());
	quorumPeer.setQuorumVerifier(config.getQuorumVerifier(), true);
	quorumPeer.setCnxnFactory(cnxnFactory);
	quorumPeer.setZKDatabase(new ZKDatabase(quorumPeer.getTxnFactory()));
	quorumPeer.setLearnerType(config.getPeerType());
	quorumPeer.setSyncEnabled(config.getSyncEnabled());
	quorumPeer.setQuorumListenOnAllIPs(config.getQuorumListenOnAllIPs());

	quorumPeer.start();
	LOGGER.info("ZkServerCluster Started! ClientPortAddress={}", config.getClientPortAddress());
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
public QuorumPeer(Map<Long, QuorumServer> quorumPeers, File dataDir,
        File dataLogDir, int electionType,
        long myid, int tickTime, int initLimit, int syncLimit,
        boolean quorumListenOnAllIPs,
        ServerCnxnFactory cnxnFactory, 
        QuorumVerifier quorumConfig) throws IOException {
    this();
    this.cnxnFactory = cnxnFactory;
    this.quorumPeers = quorumPeers;
    this.electionType = electionType;
    this.myid = myid;
    this.tickTime = tickTime;
    this.initLimit = initLimit;
    this.syncLimit = syncLimit;        
    this.quorumListenOnAllIPs = quorumListenOnAllIPs;
    this.logFactory = new FileTxnSnapLog(dataLogDir, dataDir);
    this.zkDb = new ZKDatabase(this.logFactory);
    if(quorumConfig == null)
        this.quorumConfig = new QuorumMaj(countParticipants(quorumPeers));
    else this.quorumConfig = quorumConfig;
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
/**
 * Tests purge where the data directory contains old snapshots and data
 * logs, newest snapshots and data logs
 */
@Test
public void testSnapFilesLessThanToRetain() throws Exception {
    int nRecentCount = 4;
    int fileToPurgeCount = 2;
    AtomicInteger offset = new AtomicInteger(0);
    tmpDir = ClientBase.createTmpDir();
    File version2 = new File(tmpDir.toString(), "version-2");
    Assert.assertTrue("Failed to create version_2 dir:" + version2.toString(),
            version2.mkdir());
    List<File> snapsToPurge = new ArrayList<File>();
    List<File> logsToPurge = new ArrayList<File>();
    List<File> snaps = new ArrayList<File>();
    List<File> logs = new ArrayList<File>();
    createDataDirFiles(offset, fileToPurgeCount, version2, snapsToPurge,
            logsToPurge);
    createDataDirFiles(offset, nRecentCount, version2, snaps, logs);

    FileTxnSnapLog txnLog = new FileTxnSnapLog(tmpDir, tmpDir);
    PurgeTxnLog.retainNRecentSnapshots(txnLog, snaps);
    txnLog.close();
    verifyFilesAfterPurge(snapsToPurge, false);
    verifyFilesAfterPurge(logsToPurge, false);
    verifyFilesAfterPurge(snaps, true);
    verifyFilesAfterPurge(logs, true);
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
@Override
protected Leader makeLeader(FileTxnSnapLog logFactory) throws IOException {
    LeaderZooKeeperServer zk = new LeaderZooKeeperServer(logFactory, this, this.getZkDb()) {
        @Override
        protected void setupRequestProcessors() {
            /**
             * This method is overridden to make a place to inject
             * MockSyncRequestProcessor
             */
            RequestProcessor finalProcessor = new FinalRequestProcessor(this);
            RequestProcessor toBeAppliedProcessor = new Leader.ToBeAppliedRequestProcessor(finalProcessor,
                    getLeader());
            commitProcessor = new CommitProcessor(toBeAppliedProcessor, Long.toString(getServerId()), false,
                    getZooKeeperServerListener());
            commitProcessor.start();
            ProposalRequestProcessor proposalProcessor = new MockProposalRequestProcessor(this,
                    commitProcessor);
            proposalProcessor.initialize();
            prepRequestProcessor = new PrepRequestProcessor(this, proposalProcessor);
            prepRequestProcessor.start();
            firstProcessor = new LeaderRequestProcessor(this, prepRequestProcessor);
        }

    };
    return new Leader(this, zk);
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
@Override
protected Follower makeFollower(FileTxnSnapLog logFactory) throws IOException {

    return new Follower(this, new FollowerZooKeeperServer(logFactory, this, this.getZkDb())) {

        @Override
        void writePacket(QuorumPacket pp, boolean flush) throws IOException {
            if (pp != null && pp.getType() == Leader.ACK) {
                newLeaderMessage = true;
                try {
                    /**
                     * Delaying the ACK message, a follower sends as
                     * response to a NEWLEADER message, so that the
                     * leader has a chance to send the reconfig and only
                     * then the UPTODATE message.
                     */
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            super.writePacket(pp, flush);
        }
    };
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
@Override
protected Follower makeFollower(FileTxnSnapLog logFactory)
        throws IOException {
    return new Follower(this, new FollowerZooKeeperServer(logFactory,
            this, this.getZkDb())) {

        @Override
        void readPacket(QuorumPacket pp) throws IOException {
            /**
             * In real scenario got SocketTimeoutException while reading
             * the packet from leader because of network problem, but
             * here throwing SocketTimeoutException based on whether
             * error is injected or not
             */
            super.readPacket(pp);
            if (injectError && pp.getType() == Leader.PROPOSAL) {
                String type = LearnerHandler.packetToString(pp);
                throw new SocketTimeoutException(
                        "Socket timeout while reading the packet for operation "
                                + type);
            }
        }

    };
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
public void internalTestSnapFilesEqualsToRetain(boolean testWithPrecedingLogFile) throws Exception {
    int nRecentCount = 3;
    AtomicInteger offset = new AtomicInteger(0);
    tmpDir = ClientBase.createTmpDir();
    File version2 = new File(tmpDir.toString(), "version-2");
    Assert.assertTrue("Failed to create version_2 dir:" + version2.toString(),
            version2.mkdir());
    List<File> snaps = new ArrayList<File>();
    List<File> logs = new ArrayList<File>();
    createDataDirFiles(offset, nRecentCount, testWithPrecedingLogFile, version2, snaps, logs);

    FileTxnSnapLog txnLog = new FileTxnSnapLog(tmpDir, tmpDir);
    PurgeTxnLog.purgeOlderSnapshots(txnLog, snaps.get(snaps.size() - 1));
    txnLog.close();
    verifyFilesAfterPurge(snaps, true);
    verifyFilesAfterPurge(logs, true);
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
/**
 * Creates a ZooKeeperServer instance. It sets everything up, but doesn't
 * actually start listening for clients until run() is invoked.
 * 
 * @param dataDir the directory to put the data
 */
public ZooKeeperServer(FileTxnSnapLog txnLogFactory, int tickTime,
        int minSessionTimeout, int maxSessionTimeout,
        DataTreeBuilder treeBuilder, ZKDatabase zkDb) {
    serverStats = new ServerStats(this);
    this.txnLogFactory = txnLogFactory;
    this.zkDb = zkDb;
    this.tickTime = tickTime;
    this.minSessionTimeout = minSessionTimeout;
    this.maxSessionTimeout = maxSessionTimeout;

    listener = new ZooKeeperServerListenerImpl(this);

    LOG.info("Created server with tickTime " + tickTime
            + " minSessionTimeout " + getMinSessionTimeout()
            + " maxSessionTimeout " + getMaxSessionTimeout()
            + " datadir " + txnLogFactory.getDataDir()
            + " snapdir " + txnLogFactory.getSnapDir());
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
/**
 * Test verifies that the No Auth enabled Learner is connecting to a No Auth
 * Leader server. Learner should be able to establish a connection with
 * Leader as auth is not required.
 */
@Test(timeout = 30000)
public void testNoAuthLearnerConnectsToServerWithAuthNotRequired()
        throws Exception {
    File testDataLearner = ClientBase.createTmpDir();
    File tmpDir = File.createTempFile("test", ".dir", testDataLearner);
    tmpDir.delete();
    FileTxnSnapLog ftsl = new FileTxnSnapLog(tmpDir, tmpDir);
    QuorumPeer learnerPeer = createQuorumPeer(tmpDir, true, false, false,
            "QuorumLearner", "QuorumServer", "");
    SimpleLearner sl = new SimpleLearner(ftsl, learnerPeer);

    File testDataLeader = ClientBase.createTmpDir();
    tmpDir = File.createTempFile("test", ".dir", testDataLeader);
    tmpDir.delete();
    tmpDir.mkdir();
    Leader leader = null;
    QuorumPeer peer = createQuorumPeer(tmpDir, true, false, false, "QuorumLearner",
            "QuorumServer",
            QuorumAuth.QUORUM_KERBEROS_SERVICE_PRINCIPAL_DEFAULT_VALUE);
    CountDownLatch learnerLatch = new CountDownLatch(1);
    leader = createSimpleLeader(tmpDir, peer, learnerLatch);
    peer.leader = leader;

    startLearnerCnxAcceptorThread(leader);
    LOG.info("Start establishing a connection with the Leader");
    String hostname = getLeaderHostname(peer);
    sl.connectToLeader(peer.getQuorumAddress(), hostname);

    Assert.assertTrue("Leader should accept no auth learner connection",
            learnerLatch.await(leader.self.tickTime * leader.self.initLimit + 1000,
                    TimeUnit.MILLISECONDS));
    ClientBase.recursiveDelete(testDataLearner);
    ClientBase.recursiveDelete(testDataLeader);
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
/**
 * @param port
 * @param dataDir
 * @throws IOException
 */
FollowerZooKeeperServer(FileTxnSnapLog logFactory,QuorumPeer self,
        DataTreeBuilder treeBuilder, ZKDatabase zkDb) throws IOException {
    super(logFactory, self.tickTime, self.minSessionTimeout,
            self.maxSessionTimeout, treeBuilder, zkDb, self);
    this.pendingSyncs = new ConcurrentLinkedQueue<Request>();
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
public LearnerZooKeeperServer(FileTxnSnapLog logFactory, int tickTime,
        int minSessionTimeout, int maxSessionTimeout,
        DataTreeBuilder treeBuilder, ZKDatabase zkDb, QuorumPeer self)
    throws IOException
{
    super(logFactory, tickTime, minSessionTimeout, maxSessionTimeout,
            treeBuilder, zkDb, self);
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
private ConversableObserver createObserver(File tmpDir, QuorumPeer peer)
        throws IOException {
    FileTxnSnapLog logFactory = new FileTxnSnapLog(tmpDir, tmpDir);
    peer.setTxnFactory(logFactory);
    DataTreeBuilder treeBuilder = new ZooKeeperServer.BasicDataTreeBuilder();
    ZKDatabase zkDb = new ZKDatabase(logFactory);
    ObserverZooKeeperServer zk = new ObserverZooKeeperServer(logFactory, peer, treeBuilder, zkDb);
    peer.setZKDatabase(zkDb);
    return new ConversableObserver(peer, zk);
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
protected QuorumZooKeeperServer(FileTxnSnapLog logFactory, int tickTime,
        int minSessionTimeout, int maxSessionTimeout,
        DataTreeBuilder treeBuilder, ZKDatabase zkDb, QuorumPeer self)
{
    super(logFactory, tickTime, minSessionTimeout, maxSessionTimeout,
            treeBuilder, zkDb);
    this.self = self;
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
/**
 * Default constructor, relies on the config for its agrument values
 *
 * @throws IOException
 */
public ZooKeeperServer(FileTxnSnapLog txnLogFactory,
        DataTreeBuilder treeBuilder)
    throws IOException
{
    this(txnLogFactory, DEFAULT_TICK_TIME, -1, -1, treeBuilder,
            new ZKDatabase(txnLogFactory));
}
 

import org.apache.zookeeper.server.persistence.FileTxnSnapLog; //導入依賴的package包/類
/**
 * Test verifies that the Leader should authenticate the connecting learner
 * quorumpeer. After the successful authentication it should add this
 * learner to the learnerHandler list.
 */
@Test(timeout = 30000)
public void testAuthLearnerConnectsToServerWithAuthNotRequired()
        throws Exception {
    File testDataLearner = ClientBase.createTmpDir();
    File tmpDir = File.createTempFile("test", ".dir", testDataLearner);
    tmpDir.delete();
    FileTxnSnapLog ftsl = new FileTxnSnapLog(tmpDir, tmpDir);
    QuorumPeer learnerPeer = createQuorumPeer(tmpDir, true, true, true,
            "QuorumLearner", "QuorumServer",
            QuorumAuth.QUORUM_KERBEROS_SERVICE_PRINCIPAL_DEFAULT_VALUE);
    SimpleLearner sl = new SimpleLearner(ftsl, learnerPeer);

    File testDataLeader = ClientBase.createTmpDir();
    tmpDir = File.createTempFile("test", ".dir", testDataLeader);
    tmpDir.delete();
    tmpDir.mkdir();
    Leader leader = null;
    QuorumPeer peer = createQuorumPeer(tmpDir, true, true, false, "QuorumLearner",
            "QuorumServer",
            QuorumAuth.QUORUM_KERBEROS_SERVICE_PRINCIPAL_DEFAULT_VALUE);
    CountDownLatch learnerLatch = new CountDownLatch(1);
    leader = createSimpleLeader(tmpDir, peer, learnerLatch);
    peer.leader = leader;

    startLearnerCnxAcceptorThread(leader);
    LOG.info("Start establishing a connection with the Leader");
    String hostname = getLeaderHostname(peer);
    sl.connectToLeader(peer.getQuorumAddress(), hostname);
    // wait till leader socket soTimeout period
    Assert.assertTrue("Leader should accept the auth learner connection",
            learnerLatch.await(leader.self.tickTime * leader.self.initLimit + 1000,
                    TimeUnit.MILLISECONDS));
    Assert.assertEquals("Failed to added the learner", 1,
            leader.getLearners().size());
    ClientBase.recursiveDelete(testDataLearner);
    ClientBase.recursiveDelete(testDataLeader);
}