Examples with BindException java.net.BindException used on opensource projects

Example 16 with BindException

use of java.net.BindException in project screenbird by adamhub.

the class ServerIPC method initServerOrClient.

/**
     * Attempts to start a ServerSocket to a well-known-socket. If no 
     * BindException is thrown then ServerSocket creation was successful
     * and this instance is currently the first and only instance running. 
     * <br/><br/>
     * If the BindException is thrown, that means there is another previously
     * opened/running instance of Pastevid/ScreenRecorder running. Once
     * it is determined that this instance is not the first instance, the 
     * attempt to connect to the instance which is running the ServerSocket
     * is made. 
     * 
     * @return <b>True</b> if this Pastevid/Screenrecorder application is the 
     * first instance to be opened. <b>False</b> if it is determined that this
     * instance is not the first opened instance. 
     */
public final synchronized boolean initServerOrClient() {
    try {
        // Open Socket
        this.serverSocket = new ServerSocket(SOCKET_PORT);
        // Update signals
        this.setRunningStatus(true);
        this.ipc.setIsServerOrClient(true);
        log("Base Server is up and running");
        log("Found Server, resuming application");
        return true;
    } catch (BindException e) {
        log("Base Server is already Running");
        log("Found Client, Closing GUI");
        // Update signals
        this.setRunningStatus(false);
        // This is the second instance
        // Calling original server to view
        ClientIPC client = new ClientIPC();
        client.connect();
        client.close();
        // Set this thread to kill
        this.ipc.setIsServerOrClient(false);
    } catch (IOException e) {
        log(e);
    }
    // Kill process
    return false;
}

Example 17 with BindException

use of java.net.BindException in project screenbird by adamhub.

the class Server method init.

public void init() {
    try {
        //Open Socket
        this.serverSocket = new ServerSocket(SOCKET_PORT);
        //Update signals
        this.isRunning = true;
        System.out.println("Base Server is up and running");
        //Start server
        //this.serverManager.main();
        this.ipcProtocol.setServer(this);
    } catch (BindException e) {
        System.out.println("Base Server is already Running");
        //Kill process
        System.exit(0);
    } catch (IOException e) {
        e.printStackTrace(System.err);
    }
}

Example 18 with BindException

use of java.net.BindException in project netty by netty.

the class DatagramUnicastTest method testSimpleSend0.

@SuppressWarnings("deprecation")
private void testSimpleSend0(Bootstrap sb, Bootstrap cb, ByteBuf buf, boolean bindClient, final byte[] bytes, int count) throws Throwable {
    final CountDownLatch latch = new CountDownLatch(count);
    sb.handler(new ChannelInitializer<Channel>() {

        @Override
        protected void initChannel(Channel ch) throws Exception {
            ch.pipeline().addLast(new SimpleChannelInboundHandler<DatagramPacket>() {

                @Override
                public void channelRead0(ChannelHandlerContext ctx, DatagramPacket msg) throws Exception {
                    ByteBuf buf = msg.content();
                    assertEquals(bytes.length, buf.readableBytes());
                    for (byte b : bytes) {
                        assertEquals(b, buf.readByte());
                    }
                    latch.countDown();
                }
            });
        }
    });
    cb.handler(new SimpleChannelInboundHandler<Object>() {

        @Override
        public void channelRead0(ChannelHandlerContext ctx, Object msgs) throws Exception {
        // Nothing will be sent.
        }
    });
    Channel sc = null;
    BindException bindFailureCause = null;
    for (int i = 0; i < 3; i++) {
        try {
            sc = sb.bind().sync().channel();
            break;
        } catch (Exception e) {
            if (e instanceof BindException) {
                logger.warn("Failed to bind to a free port; trying again", e);
                bindFailureCause = (BindException) e;
                refreshLocalAddress(sb);
            } else {
                throw e;
            }
        }
    }
    if (sc == null) {
        throw bindFailureCause;
    }
    Channel cc;
    if (bindClient) {
        cc = cb.bind().sync().channel();
    } else {
        cb.option(ChannelOption.DATAGRAM_CHANNEL_ACTIVE_ON_REGISTRATION, true);
        cc = cb.register().sync().channel();
    }
    for (int i = 0; i < count; i++) {
        cc.write(new DatagramPacket(buf.retain().duplicate(), addr));
    }
    // release as we used buf.retain() before
    buf.release();
    cc.flush();
    assertTrue(latch.await(10, TimeUnit.SECONDS));
    sc.close().sync();
    cc.close().sync();
}

Example 19 with BindException

use of java.net.BindException in project neo4j by neo4j.

the class NettyServer method start.

@Override
public void start() throws Throwable {
    // The boss thread accepts new incoming connections and chooses a worker thread to be responsible for the
    // IO of the new connection. We expect new connections to be (comparatively) rare, so we allocate a single
    // thread for this.
    // TODO: In fact, dedicating a whole thread to sit and spin in #select for new connections may be a waste of
    // time, we could have the same event loop groups for both handling new connections and for handling events
    // on existing connections
    bossGroup = new NioEventLoopGroup(1, tf);
    // These threads handle live channels. Each thread has a set of channels it is responsible for, and it will
    // continuously run a #select() loop to react to new events on these channels.
    selectorGroup = new NioEventLoopGroup(NUM_SELECTOR_THREADS, tf);
    for (ProtocolInitializer initializer : bootstrappers) {
        try {
            new ServerBootstrap().option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT).group(bossGroup, selectorGroup).channel(NioServerSocketChannel.class).childHandler(initializer.channelInitializer()).bind(initializer.address().socketAddress()).sync();
        } catch (Throwable e) {
            // In any case, we do all this just in order to throw a more helpful bind exception, oh, and here's that part coming right now!
            if (e instanceof BindException) {
                throw new PortBindException(initializer.address(), (BindException) e);
            }
            throw e;
        }
    }
}

Example 20 with BindException

use of java.net.BindException in project hadoop by apache.

the class TestNameNodeMXBean method testNNDirectorySize.

@Test(timeout = 120000)
public void testNNDirectorySize() throws Exception {
    Configuration conf = new Configuration();
    conf.setInt(DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1);
    MiniDFSCluster cluster = null;
    for (int i = 0; i < 5; i++) {
        try {
            // Have to specify IPC ports so the NNs can talk to each other.
            int[] ports = ServerSocketUtil.getPorts(2);
            MiniDFSNNTopology topology = new MiniDFSNNTopology().addNameservice(new MiniDFSNNTopology.NSConf("ns1").addNN(new MiniDFSNNTopology.NNConf("nn1").setIpcPort(ports[0])).addNN(new MiniDFSNNTopology.NNConf("nn2").setIpcPort(ports[1])));
            cluster = new MiniDFSCluster.Builder(conf).nnTopology(topology).numDataNodes(0).build();
            break;
        } catch (BindException e) {
            // retry if race on ports given by ServerSocketUtil#getPorts
            continue;
        }
    }
    if (cluster == null) {
        fail("failed to start mini cluster.");
    }
    FileSystem fs = null;
    try {
        cluster.waitActive();
        FSNamesystem nn0 = cluster.getNamesystem(0);
        FSNamesystem nn1 = cluster.getNamesystem(1);
        checkNNDirSize(cluster.getNameDirs(0), nn0.getNameDirSize());
        checkNNDirSize(cluster.getNameDirs(1), nn1.getNameDirSize());
        cluster.transitionToActive(0);
        fs = cluster.getFileSystem(0);
        DFSTestUtil.createFile(fs, new Path("/file"), 0, (short) 1, 0L);
        //rollEditLog
        HATestUtil.waitForStandbyToCatchUp(cluster.getNameNode(0), cluster.getNameNode(1));
        checkNNDirSize(cluster.getNameDirs(0), nn0.getNameDirSize());
        checkNNDirSize(cluster.getNameDirs(1), nn1.getNameDirSize());
        //Test metric after call saveNamespace
        DFSTestUtil.createFile(fs, new Path("/file"), 0, (short) 1, 0L);
        nn0.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
        nn0.saveNamespace(0, 0);
        checkNNDirSize(cluster.getNameDirs(0), nn0.getNameDirSize());
    } finally {
        cluster.shutdown();
    }
}