Java Version类代码示例

import io.netty.util.Version; //导入依赖的package包/类
private void run()
{
    // Check that a SaslAuthenticator can be provided by the configured
    // IAuthenticator. If not, don't start the server.
    IAuthenticator authenticator = DatabaseDescriptor.getAuthenticator();
    if (authenticator.requireAuthentication() && !(authenticator instanceof ISaslAwareAuthenticator))
    {
        logger.error("Not starting native transport as the configured IAuthenticator is not capable of SASL authentication");
        isRunning.compareAndSet(true, false);
        return;
    }

    // Configure the server.
    eventExecutorGroup = new RequestThreadPoolExecutor();


    boolean hasEpoll = enableEpoll ? Epoll.isAvailable() : false;
    if (hasEpoll)
    {
        workerGroup = new EpollEventLoopGroup();
        logger.info("Netty using native Epoll event loop");
    }
    else
    {
        workerGroup = new NioEventLoopGroup();
        logger.info("Netty using Java NIO event loop");
    }

    ServerBootstrap bootstrap = new ServerBootstrap()
                                .group(workerGroup)
                                .channel(hasEpoll ? EpollServerSocketChannel.class : NioServerSocketChannel.class)
                                .childOption(ChannelOption.TCP_NODELAY, true)
                                .childOption(ChannelOption.SO_LINGER, 0)
                                .childOption(ChannelOption.SO_KEEPALIVE, DatabaseDescriptor.getRpcKeepAlive())
                                .childOption(ChannelOption.ALLOCATOR, CBUtil.allocator)
                                .childOption(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, 32 * 1024)
                                .childOption(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, 8 * 1024);

    final EncryptionOptions.ClientEncryptionOptions clientEnc = DatabaseDescriptor.getClientEncryptionOptions();
    if (clientEnc.enabled)
    {
        logger.info("Enabling encrypted CQL connections between client and server");
        bootstrap.childHandler(new SecureInitializer(this, clientEnc));
    }
    else
    {
        bootstrap.childHandler(new Initializer(this));
    }

    // Bind and start to accept incoming connections.
    logger.info("Using Netty Version: {}", Version.identify().entrySet());
    logger.info("Starting listening for CQL clients on {}...", socket);

    ChannelFuture bindFuture = bootstrap.bind(socket);
    if (!bindFuture.awaitUninterruptibly().isSuccess())
        throw new IllegalStateException(String.format("Failed to bind port %d on %s.", socket.getPort(), socket.getAddress().getHostAddress()));

    connectionTracker.allChannels.add(bindFuture.channel());
    isRunning.set(true);
}
 

import io.netty.util.Version; //导入依赖的package包/类
public synchronized void start()
{
    if(isRunning()) 
        return;

    // Configure the server.
    ServerBootstrap bootstrap = new ServerBootstrap()
                                .channel(useEpoll ? EpollServerSocketChannel.class : NioServerSocketChannel.class)
                                .childOption(ChannelOption.TCP_NODELAY, true)
                                .childOption(ChannelOption.SO_LINGER, 0)
                                .childOption(ChannelOption.SO_KEEPALIVE, DatabaseDescriptor.getRpcKeepAlive())
                                .childOption(ChannelOption.ALLOCATOR, CBUtil.allocator)
                                .childOption(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, 32 * 1024)
                                .childOption(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, 8 * 1024);
    if (workerGroup != null)
        bootstrap = bootstrap.group(workerGroup);

    final EncryptionOptions.ClientEncryptionOptions clientEnc = DatabaseDescriptor.getClientEncryptionOptions();
    if (this.useSSL)
    {
        if (clientEnc.optional)
        {
            logger.info("Enabling optionally encrypted CQL connections between client and server");
            bootstrap.childHandler(new OptionalSecureInitializer(this, clientEnc));
        }
        else
        {
            logger.info("Enabling encrypted CQL connections between client and server");
            bootstrap.childHandler(new SecureInitializer(this, clientEnc));
        }
    }
    else
    {
        bootstrap.childHandler(new Initializer(this));
    }

    // Bind and start to accept incoming connections.
    logger.info("Using Netty Version: {}", Version.identify().entrySet());
    logger.info("Starting listening for CQL clients on {} ({})...", socket, this.useSSL ? "encrypted" : "unencrypted");

    ChannelFuture bindFuture = bootstrap.bind(socket);
    if (!bindFuture.awaitUninterruptibly().isSuccess())
        throw new IllegalStateException(String.format("Failed to bind port %d on %s.", socket.getPort(), socket.getAddress().getHostAddress()));

    connectionTracker.allChannels.add(bindFuture.channel());
    isRunning.set(true);
}
 

import io.netty.util.Version; //导入依赖的package包/类
@Test
public void commandNotExecutedChannelClosesWhileFlush() {

    assumeTrue(Version.identify().get("netty-transport").artifactVersion().startsWith("4.0.2"));

    RedisCommands<String, String> connection = client.connect().sync();
    RedisCommands<String, String> verificationConnection = client.connect().sync();
    RedisChannelWriter<String, String> channelWriter = getRedisChannelHandler(connection).getChannelWriter();

    connection.set(key, "1");
    assertThat(verificationConnection.get(key)).isEqualTo("1");

    final CountDownLatch block = new CountDownLatch(1);

    AsyncCommand<String, String, Object> command = new AsyncCommand<String, String, Object>(new Command<>(CommandType.INCR,
            new IntegerOutput(CODEC), new CommandArgs<>(CODEC).addKey(key))) {

        @Override
        public void encode(ByteBuf buf) {
            try {
                block.await();
            } catch (InterruptedException e) {
            }
            super.encode(buf);
        }
    };

    channelWriter.write(command);

    Channel channel = getChannel(getRedisChannelHandler(connection));
    channel.unsafe().disconnect(channel.newPromise());

    assertThat(channel.isOpen()).isFalse();
    assertThat(command.isCancelled()).isFalse();
    assertThat(command.isDone()).isFalse();
    block.countDown();
    assertThat(command.await(2, TimeUnit.SECONDS)).isTrue();
    assertThat(command.isCancelled()).isFalse();
    assertThat(command.isDone()).isTrue();

    assertThat(verificationConnection.get(key)).isEqualTo("1");

    assertThat(getDisconnectedBuffer(getRedisChannelHandler(connection))).isEmpty();
    assertThat(getCommandBuffer(getRedisChannelHandler(connection))).isEmpty();

    connection.close();
}
 

import io.netty.util.Version; //导入依赖的package包/类
@Test
public void commandNotFailedChannelClosesWhileFlush() throws Exception {

    assumeTrue(Version.identify().get("netty-transport").artifactVersion().startsWith("4.0.2"));

    RedisCommands<String, String> connection = client.connect().sync();
    RedisCommands<String, String> verificationConnection = client.connect().sync();
    RedisChannelWriter<String, String> channelWriter = getRedisChannelHandler(connection).getChannelWriter();

    connection.set(key, "1");
    assertThat(verificationConnection.get(key)).isEqualTo("1");

    final CountDownLatch block = new CountDownLatch(1);

    ConnectionWatchdog connectionWatchdog = Connections.getConnectionWatchdog(connection.getStatefulConnection());

    AsyncCommand<String, String, Object> command = getBlockOnEncodeCommand(block);

    channelWriter.write(command);

    connectionWatchdog.setReconnectSuspended(true);

    Channel channel = getChannel(getRedisChannelHandler(connection));
    channel.unsafe().disconnect(channel.newPromise());

    assertThat(channel.isOpen()).isFalse();
    assertThat(command.isCancelled()).isFalse();
    assertThat(command.isDone()).isFalse();
    block.countDown();
    assertThat(command.await(2, TimeUnit.SECONDS)).isFalse();
    assertThat(command.isCancelled()).isFalse();
    assertThat(command.isDone()).isFalse();

    assertThat(verificationConnection.get(key)).isEqualTo("1");

    assertThat(getDisconnectedBuffer(getRedisChannelHandler(connection))).isEmpty();
    assertThat(getCommandBuffer(getRedisChannelHandler(connection))).isNotEmpty().contains(command);

    connection.close();
}
 

import io.netty.util.Version; //导入依赖的package包/类
@Test
public void commandRetriedChannelClosesWhileFlush() throws Exception {

    assumeTrue(Version.identify().get("netty-transport").artifactVersion().startsWith("4.0.2"));

    RedisCommands<String, String> connection = client.connect().sync();
    RedisCommands<String, String> verificationConnection = client.connect().sync();
    RedisChannelWriter<String, String> channelWriter = getRedisChannelHandler(connection).getChannelWriter();

    connection.set(key, "1");
    assertThat(verificationConnection.get(key)).isEqualTo("1");

    final CountDownLatch block = new CountDownLatch(1);

    ConnectionWatchdog connectionWatchdog = Connections.getConnectionWatchdog(connection.getStatefulConnection());

    AsyncCommand<String, String, Object> command = getBlockOnEncodeCommand(block);

    channelWriter.write(command);

    connectionWatchdog.setReconnectSuspended(true);

    Channel channel = getChannel(getRedisChannelHandler(connection));
    channel.unsafe().disconnect(channel.newPromise());

    assertThat(channel.isOpen()).isFalse();
    assertThat(command.isCancelled()).isFalse();
    assertThat(command.isDone()).isFalse();
    block.countDown();
    assertThat(command.await(2, TimeUnit.SECONDS)).isFalse();

    connectionWatchdog.setReconnectSuspended(false);
    connectionWatchdog.scheduleReconnect();

    assertThat(command.await(2, TimeUnit.SECONDS)).isTrue();
    assertThat(command.isCancelled()).isFalse();
    assertThat(command.isDone()).isTrue();

    assertThat(verificationConnection.get(key)).isEqualTo("2");

    assertThat(getDisconnectedBuffer(getRedisChannelHandler(connection))).isEmpty();
    assertThat(getCommandBuffer(getRedisChannelHandler(connection))).isEmpty();

    connection.close();
    verificationConnection.close();
}