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

Example 6 with ServerSocket

use of java.net.ServerSocket in project flink by apache.

the class TaskManagerStartupTest method testStartupWhenTaskmanagerActorPortIsUsed.

/**
	 * Tests that the TaskManager fails synchronously when the actor system port
	 * is in use.
	 * 
	 * @throws Throwable
	 */
@Test(expected = BindException.class)
public void testStartupWhenTaskmanagerActorPortIsUsed() throws BindException {
    ServerSocket blocker = null;
    try {
        final String localHostName = "localhost";
        final InetAddress localBindAddress = InetAddress.getByName(NetUtils.getWildcardIPAddress());
        // block some port
        blocker = new ServerSocket(0, 50, localBindAddress);
        final int port = blocker.getLocalPort();
        TaskManager.runTaskManager(localHostName, ResourceID.generate(), port, new Configuration(), TaskManager.class);
        fail("This should fail with an IOException");
    } catch (IOException e) {
        // expected. validate the error message
        List<Throwable> causes = StartupUtils.getExceptionCauses(e, new ArrayList<Throwable>());
        for (Throwable cause : causes) {
            if (cause instanceof BindException) {
                throw (BindException) cause;
            }
        }
        fail("This should fail with an exception caused by BindException");
    } catch (Exception e) {
        e.printStackTrace();
        fail(e.getMessage());
    } finally {
        if (blocker != null) {
            try {
                blocker.close();
            } catch (IOException e) {
            // no need to log here
            }
        }
    }
}

Example 7 with ServerSocket

use of java.net.ServerSocket in project flink by apache.

the class TaskManagerStartupTest method testStartupWhenNetworkStackFailsToInitialize.

/**
	 * Tests that the task manager start-up fails if the network stack cannot be initialized.
	 * @throws Exception
	 */
@Test(expected = IOException.class)
public void testStartupWhenNetworkStackFailsToInitialize() throws Exception {
    ServerSocket blocker = null;
    try {
        blocker = new ServerSocket(0, 50, InetAddress.getByName("localhost"));
        final Configuration cfg = new Configuration();
        cfg.setString(ConfigConstants.TASK_MANAGER_HOSTNAME_KEY, "localhost");
        cfg.setInteger(ConfigConstants.TASK_MANAGER_DATA_PORT_KEY, blocker.getLocalPort());
        cfg.setInteger(ConfigConstants.TASK_MANAGER_MEMORY_SIZE_KEY, 1);
        TaskManager.startTaskManagerComponentsAndActor(cfg, ResourceID.generate(), null, "localhost", Option.<String>empty(), Option.<LeaderRetrievalService>empty(), false, TaskManager.class);
    } finally {
        if (blocker != null) {
            try {
                blocker.close();
            } catch (IOException e) {
            // ignore, best effort
            }
        }
    }
}

Example 8 with ServerSocket

use of java.net.ServerSocket in project flink by apache.

the class SocketClientSinkTest method testSocketSink.

@Test
public void testSocketSink() throws Exception {
    final ServerSocket server = new ServerSocket(0);
    final int port = server.getLocalPort();
    final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
    Thread sinkRunner = new Thread("Test sink runner") {

        @Override
        public void run() {
            try {
                SocketClientSink<String> simpleSink = new SocketClientSink<>(host, port, simpleSchema, 0);
                simpleSink.open(new Configuration());
                simpleSink.invoke(TEST_MESSAGE + '\n');
                simpleSink.close();
            } catch (Throwable t) {
                error.set(t);
            }
        }
    };
    sinkRunner.start();
    Socket sk = server.accept();
    BufferedReader rdr = new BufferedReader(new InputStreamReader(sk.getInputStream()));
    String value = rdr.readLine();
    sinkRunner.join();
    server.close();
    if (error.get() != null) {
        Throwable t = error.get();
        t.printStackTrace();
        fail("Error in spawned thread: " + t.getMessage());
    }
    assertEquals(TEST_MESSAGE, value);
}

Example 9 with ServerSocket

use of java.net.ServerSocket in project flink by apache.

the class SocketClientSinkTest method testSinkAutoFlush.

@Test
public void testSinkAutoFlush() throws Exception {
    final ServerSocket server = new ServerSocket(0);
    final int port = server.getLocalPort();
    final SocketClientSink<String> simpleSink = new SocketClientSink<>(host, port, simpleSchema, 0, true);
    simpleSink.open(new Configuration());
    final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
    Thread sinkRunner = new Thread("Test sink runner") {

        @Override
        public void run() {
            try {
                // need two messages here: send a fin to cancel the client state:FIN_WAIT_2 while the server is CLOSE_WAIT
                simpleSink.invoke(TEST_MESSAGE + '\n');
            } catch (Throwable t) {
                error.set(t);
            }
        }
    };
    sinkRunner.start();
    Socket sk = server.accept();
    BufferedReader rdr = new BufferedReader(new InputStreamReader(sk.getInputStream()));
    String value = rdr.readLine();
    sinkRunner.join();
    simpleSink.close();
    server.close();
    if (error.get() != null) {
        Throwable t = error.get();
        t.printStackTrace();
        fail("Error in spawned thread: " + t.getMessage());
    }
    assertEquals(TEST_MESSAGE, value);
}

Example 10 with ServerSocket

use of java.net.ServerSocket in project flink by apache.

the class SocketTextStreamFunctionTest method testSocketSourceOutputInfiniteRetries.

@Test
public void testSocketSourceOutputInfiniteRetries() throws Exception {
    ServerSocket server = new ServerSocket(0);
    Socket channel = null;
    try {
        SocketTextStreamFunction source = new SocketTextStreamFunction(LOCALHOST, server.getLocalPort(), "\n", -1, 100);
        SocketSourceThread runner = new SocketSourceThread(source, "test1", "check");
        runner.start();
        // first connection: nothing
        channel = server.accept();
        channel.close();
        // second connection: first string
        channel = server.accept();
        OutputStreamWriter writer = new OutputStreamWriter(channel.getOutputStream());
        writer.write("test1\n");
        writer.close();
        channel.close();
        // third connection: nothing
        channel = server.accept();
        channel.close();
        // forth connection: second string
        channel = server.accept();
        writer = new OutputStreamWriter(channel.getOutputStream());
        writer.write("check\n");
        writer.flush();
        runner.waitForNumElements(2);
        runner.cancel();
        runner.waitUntilDone();
    } finally {
        if (channel != null) {
            IOUtils.closeQuietly(channel);
        }
        IOUtils.closeQuietly(server);
    }
}