Example usage for java.net ServerSocket ServerSocket

List of usage examples for java.net ServerSocket ServerSocket

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Introduction

In this page you can find the example usage for java.net ServerSocket ServerSocket.

Prototype

public ServerSocket(int port) throws IOException

Source Link

Document

Creates a server socket, bound to the specified port.

Usage

From source file:com.google.dart.tools.core.DartCore.java

/**
 * Find and return an unused server socket port.
 *///from w ww  . jav a 2  s  .co m
public static int findUnusedPort() {
    try {
        ServerSocket ss = new ServerSocket(0);
        int port = ss.getLocalPort();
        ss.close();
        return port;
    } catch (IOException ioe) {
        //$FALL-THROUGH$
    }
    return -1;
}

From source file:org.apache.activemq.leveldb.test.ReplicatedLevelDBBrokerTest.java

@Before
public void findFreePort() throws Exception {
    ServerSocket socket = new ServerSocket(0);
    port = socket.getLocalPort();//from ww  w.  java  2 s .co  m
    socket.close();
}

From source file:brooklyn.util.ssh.BashCommandsIntegrationTest.java

License:asdf

private ServerSocket openServerSocket() {
    int lowerBound = 40000;
    int upperBound = 40100;
    for (int i = lowerBound; i < upperBound; i++) {
        try {/*from www .  j  ava  2s  .  c  o  m*/
            return new ServerSocket(i);
        } catch (IOException e) {
            // try next number
        }
    }
    throw new IllegalStateException("No ports available in range " + lowerBound + " to " + upperBound);
}

From source file:com.app.server.Main.java

/**
 * This is the start of the all the services in web server
 * @param args//from   ww w .  j av  a 2s .  c  o  m
 * @throws IOException 
 * @throws SAXException 
 */
public static void main(String[] args) throws IOException, SAXException {

    long startTime = System.currentTimeMillis();
    Hashtable urlClassLoaderMap = new Hashtable();
    Hashtable executorServicesMap = new Hashtable();
    Hashtable ataMap = new Hashtable<String, ATAConfig>();
    Hashtable messagingClassMap = new Hashtable();
    ConcurrentHashMap servletMapping = new ConcurrentHashMap();
    Vector deployerList = new Vector(), serviceList = new Vector();
    DigesterLoader serverdigesterLoader = DigesterLoader.newLoader(new FromXmlRulesModule() {
        protected void loadRules() {
            // TODO Auto-generated method stub
            try {
                loadXMLRules(new InputSource(new FileInputStream("./config/serverconfig-rules.xml")));
            } catch (FileNotFoundException e) {
                log.error("Error in loading the xml rules ./config/serverconfig-rules.xml", e);
                // TODO Auto-generated catch block
                //e.printStackTrace();
            }

        }
    });
    Digester serverdigester = serverdigesterLoader.newDigester();
    final ServerConfig serverconfig = (ServerConfig) serverdigester
            .parse(new InputSource(new FileInputStream("./config/serverconfig.xml")));

    //log.info(messagingconfig);
    ////log.info(serverconfig.getDeploydirectory());
    PropertyConfigurator.configure("log4j.properties");
    /*MemcachedClient cache=new MemcachedClient(
        new InetSocketAddress("localhost", 1000));*/

    // Store a value (async) for one hour
    //c.set("someKey", 36, new String("arun"));
    // Retrieve a value.        
    System.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.naming.java.javaURLContextFactory");
    System.setProperty(Context.URL_PKG_PREFIXES, "org.apache.naming");
    ExecutorService executor = java.util.concurrent.Executors.newCachedThreadPool();

    MBeanServer mbs = MBeanServerFactory.createMBeanServer("singham");
    ObjectName name = null;
    try {
        mbs.registerMBean(serverconfig, new ObjectName("com.app.server:type=serverinfo"));
    } catch (Exception e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    /*try {
       name = new ObjectName("com.app.server:type=WarDeployer");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    WarDeployer warDeployer=new WarDeployer(serverconfig.getDeploydirectory(),serverconfig.getFarmWarDir(),serverconfig.getClustergroup(),urlClassLoaderMap,executorServicesMap,messagingClassMap,servletMapping,messagingconfig,sessionObjects);
    warDeployer.setPriority(MIN_PRIORITY);
    try {
       mbs.registerMBean(warDeployer, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    //warDeployer.start();
    executor.execute(warDeployer);*/

    final byte[] shutdownBt = new byte[50];
    /*WebServerRequestProcessor webserverRequestProcessor=new WebServer().new WebServerRequestProcessor(servletMapping,urlClassLoaderMap,serverSocketChannel,serverconfig.getDeploydirectory(),Integer.parseInt(serverconfig.getShutdownport()),1);
      webserverRequestProcessor.setPriority(MIN_PRIORITY);
    try {
       name = new ObjectName("com.app.server:type=WebServerRequestProcessor");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(webserverRequestProcessor, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
            
    //webserverRequestProcessor.start();
      executor.execute(webserverRequestProcessor);
            
            
      for(int i=0;i<10;i++){
       WebServerRequestProcessor webserverRequestProcessor1=new WebServer().new WebServerRequestProcessor(servletMapping,urlClassLoaderMap,serverSocketChannel,serverconfig.getDeploydirectory(),Integer.parseInt(serverconfig.getShutdownport()),2);
    webserverRequestProcessor1.setPriority(MIN_PRIORITY);
       try {
    name = new ObjectName("com.app.server:type=WebServerRequestProcessor"+(i+1));
       } catch (MalformedObjectNameException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
       } 
               
       try {
    mbs.registerMBean(webserverRequestProcessor1, name);
       } catch (InstanceAlreadyExistsException | MBeanRegistrationException
       | NotCompliantMBeanException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
       }
               
         executor.execute(webserverRequestProcessor1);
      }*/

    /*ExecutorServiceThread executorService=new ExecutorServiceThread(serverSocketChannelServices,executorServicesMap,Integer.parseInt(serverconfig.getShutdownport()),ataMap,urlClassLoaderMap,serverconfig.getDeploydirectory(),serverconfig.getServicesdirectory(),serverconfig.getEarservicesdirectory(),serverconfig.getNodesport());
            
    try {
       name = new ObjectName("com.app.services:type=ExecutorServiceThread");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(executorService, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
            
    //executorService.start();
    executor.execute(executorService);
            
            
    for(int i=0;i<10;i++){
       ExecutorServiceThread executorService1=new ExecutorServiceThread(serverSocketChannelServices,executorServicesMap,Integer.parseInt(serverconfig.getShutdownport()),ataMap,urlClassLoaderMap,serverconfig.getDeploydirectory(),serverconfig.getServicesdirectory(),serverconfig.getEarservicesdirectory(),serverconfig.getNodesport());
               
       try {
    name = new ObjectName("com.app.services:type=ExecutorServiceThread"+(i+1));
       } catch (MalformedObjectNameException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
       } 
               
       try {
    mbs.registerMBean(executorService1, name);
       } catch (InstanceAlreadyExistsException | MBeanRegistrationException
       | NotCompliantMBeanException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
       }
               
       executor.execute(executorService1);
    }*/

    /*WebServerHttpsRequestProcessor webserverHttpsRequestProcessor=new WebServer().new WebServerHttpsRequestProcessor(servletMapping,urlClassLoaderMap,Integer.parseInt(serverconfig.getHttpsport()),serverconfig.getDeploydirectory(),Integer.parseInt(serverconfig.getShutdownport()),serverconfig.getHttpscertificatepath(),serverconfig.getHttpscertificatepasscode(),1);
    try {
       name = new ObjectName("com.app.server:type=WebServerHttpsRequestProcessor");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(webserverHttpsRequestProcessor, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
    webserverHttpsRequestProcessor.setPriority(MAX_PRIORITY);
    //webserverRequestProcessor.start();
      executor.execute(webserverHttpsRequestProcessor);*/

    /* for(int i=0;i<2;i++){
        webserverHttpsRequestProcessor=new WebServer().new WebServerHttpsRequestProcessor(urlClassLoaderMap,Integer.parseInt(serverconfig.getHttpsport())+(i+1),serverconfig.getDeploydirectory(),Integer.parseInt(serverconfig.getShutdownport()),serverconfig.getHttpscertificatepath(),serverconfig.getHttpscertificatepasscode(),1);
              
      try {
    name = new ObjectName("com.app.server:type=WebServerHttpsRequestProcessor"+(i+1));
      } catch (MalformedObjectNameException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
      } 
              
      try {
    mbs.registerMBean(webserverHttpsRequestProcessor, name);
      } catch (InstanceAlreadyExistsException | MBeanRegistrationException
       | NotCompliantMBeanException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
      }
              
      executor.execute(webserverHttpsRequestProcessor);
    }*/

    /*ATAServer ataServer=new ATAServer(serverconfig.getAtaaddress(),serverconfig.getAtaport(),ataMap);
            
    try {
       name = new ObjectName("com.app.services:type=ATAServer");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(ataServer, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
            
            
    ataServer.start();*/

    /*ATAConfigClient ataClient=new ATAConfigClient(serverconfig.getAtaaddress(),serverconfig.getAtaport(),serverconfig.getServicesport(),executorServicesMap);
            
    try {
       name = new ObjectName("com.app.services:type=ATAConfigClient");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(ataClient, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
    ataClient.start();*/

    /*MessagingServer messageServer=new MessagingServer(serverconfig.getMessageport(),messagingClassMap);
            
    try {
       name = new ObjectName("com.app.messaging:type=MessagingServer");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(messageServer, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
    //messageServer.start();
    executor.execute(messageServer);*/

    /*RandomQueueMessagePicker randomqueuemessagepicker=new RandomQueueMessagePicker(messagingClassMap);
            
    try {
       name = new ObjectName("com.app.messaging:type=RandomQueueMessagePicker");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(randomqueuemessagepicker, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
            
    //randomqueuemessagepicker.start();
    executor.execute(randomqueuemessagepicker);*/

    /*RoundRobinQueueMessagePicker roundrobinqueuemessagepicker=new RoundRobinQueueMessagePicker(messagingClassMap);
            
    try {
       name = new ObjectName("com.app.messaging:type=RoundRobinQueueMessagePicker");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(roundrobinqueuemessagepicker, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
            
    //roundrobinqueuemessagepicker.start();
    executor.execute(roundrobinqueuemessagepicker);*/

    /*TopicMessagePicker topicpicker= new TopicMessagePicker(messagingClassMap);
            
    try {
       name = new ObjectName("com.app.messaging:type=TopicMessagePicker");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(topicpicker, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
    //topicpicker.start();
    executor.execute(topicpicker);*/

    try {
        name = new ObjectName(SARDeployer.OBJECT_NAME);
    } catch (Exception e) {
        log.error("Error in creating the object name " + SARDeployer.OBJECT_NAME, e);
        // TODO Auto-generated catch block
        //e1.printStackTrace();
    }
    log.info(System.getProperty("user.dir"));
    try {
        mbs.createMBean("com.app.server.SARDeployer", name);
        mbs.invoke(name, "init", new Object[] { deployerList }, new String[] { Vector.class.getName() });
        mbs.invoke(name, "init", new Object[] { serviceList, serverconfig, mbs }, new String[] {
                Vector.class.getName(), ServerConfig.class.getName(), MBeanServer.class.getName() });
        mbs.invoke(name, "start", null, null);
        mbs.invoke(name, "deploy",
                new Object[] {
                        new URL("file:///" + new File("").getAbsolutePath() + "/config/mbean-service.xml") },
                new String[] { URL.class.getName() });
        /*name=new ObjectName("com.app.server:type=deployer,service=WARDeployer");
        mbs.invoke(name, "deploy", new Object[]{new URL("file:///"+serverconfig.getDeploydirectory()+"/TestDollar2.war")}, new String[]{URL.class.getName()});
        mbs.invoke(name, "deploy", new Object[]{new URL("file:///"+serverconfig.getDeploydirectory()+"/StrutsProj.war")}, new String[]{URL.class.getName()});*/
        //mbs.registerMBean("", name);
    } catch (Exception ex) {
        log.error("Error in SAR DEPLOYER ", ex);
        // TODO Auto-generated catch block
        //e1.printStackTrace();
    }

    //scanner.deployPackages(new File[]{new File(serverconfig.getDeploydirectory()+"/AppServer.war")});

    try {
        new NodeResourceReceiver(mbs).start();
    } catch (Exception ex) {
        log.error("Node Receiver start", ex);
        //e2.printStackTrace();
    }
    long endTime = System.currentTimeMillis();
    log.info("Server started in " + ((endTime - startTime) / 1000) + " seconds");
    /*try {
       mbs.invoke(name, "startDeployer", null, null);
    } catch (InstanceNotFoundException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } catch (ReflectionException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } catch (MBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
    */
    /*JarDeployer jarDeployer=new JarDeployer(registry,serverconfig.getServicesdirectory(), serverconfig.getServiceslibdirectory(),serverconfig.getCachedir(),executorServicesMap, urlClassLoaderMap);
    try {
       name = new ObjectName("com.app.server:type=JarDeployer");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(jarDeployer, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
            
    //jarDeployer.start();
    executor.execute(jarDeployer);*/

    /*EARDeployer earDeployer=new EARDeployer(registry,serverconfig.getEarservicesdirectory(),serverconfig.getDeploydirectory(),executorServicesMap, urlClassLoaderMap,serverconfig.getCachedir(),warDeployer);
    try {
       name = new ObjectName("com.app.server:type=EARDeployer");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(earDeployer, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
            
    //earDeployer.start();
    executor.execute(earDeployer);*/

    /*JVMConsole jvmConsole=new JVMConsole(Integer.parseInt(serverconfig.getJvmConsolePort()));
            
    try {
       name = new ObjectName("com.app.server:type=JVMConsole");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(jvmConsole, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
    executor.execute(jvmConsole);*/

    /*ScheduledExecutorService exec = Executors.newSingleThreadScheduledExecutor();
     XMLDeploymentScanner xmlDeploymentScanner =new XMLDeploymentScanner(serverconfig.getDeploydirectory(),serverconfig.getServiceslibdirectory());
    exec.scheduleAtFixedRate(xmlDeploymentScanner, 0, 1000, TimeUnit.MILLISECONDS);*/

    /*EmbeddedJMS embeddedJMS=null;
    try {
       embeddedJMS=new EmbeddedJMS();
       embeddedJMS.start();
    } catch (Exception ex) {
       // TODO Auto-generated catch block
       ex.printStackTrace();
    }   
             
     EJBDeployer ejbDeployer=new EJBDeployer(serverconfig.getServicesdirectory(),registry,Integer.parseInt(serverconfig.getServicesregistryport()),embeddedJMS);
    try {
       name = new ObjectName("com.app.server:type=EJBDeployer");
    } catch (MalformedObjectNameException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    } 
            
    try {
       mbs.registerMBean(ejbDeployer, name);
    } catch (InstanceAlreadyExistsException | MBeanRegistrationException
    | NotCompliantMBeanException e1) {
       // TODO Auto-generated catch block
       e1.printStackTrace();
    }
            
    //jarDeployer.start();
    executor.execute(ejbDeployer);*/

    new Thread() {
        public void run() {
            try {
                ServerSocket serverSocket = new ServerSocket(Integer.parseInt(serverconfig.getShutdownport()));
                while (true) {
                    Socket sock = serverSocket.accept();
                    InputStream istream = sock.getInputStream();
                    istream.read(shutdownBt);
                    String shutdownStr = new String(shutdownBt);
                    String[] shutdownToken = shutdownStr.split("\r\n\r\n");
                    //log.info(shutdownStr);
                    if (shutdownToken[0].startsWith("shutdown WebServer")) {
                        synchronized (shutDownObject) {
                            shutDownObject.notifyAll();
                        }
                    }
                }
            } catch (Exception e) {
                log.error("Shutdown error", e);
                // TODO Auto-generated catch block
                //e.printStackTrace();
            }
        }
    }.start();

    Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
        public void run() {
            log.info("IN shutdown Hook");
            synchronized (shutDownObject) {
                shutDownObject.notifyAll();
            }
        }
    }));
    try {
        synchronized (shutDownObject) {
            shutDownObject.wait();
        }
        //executor.shutdownNow();
        //serverSocketChannelServices.close();
        //embeddedJMS.stop();

    } catch (Exception e) {
        log.error("Error in object wait ", e);
        // TODO Auto-generated catch block
        //e1.printStackTrace();
    }
    try {
        mbs.invoke(name, "stop", null, null);
        mbs.invoke(name, "destroy", null, null);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    log.info("Halting JVM");
    log.info("Exiting JVM");
    /*try{
       Thread.sleep(10000);
    }
    catch(Exception ex){
               
    }*/

    //webserverRequestProcessor.stop();
    //webserverRequestProcessor1.stop();

    /*warDeployer.stop();
    executorService.stop();
    //ataServer.stop();
    //ataClient.stop();
    messageServer.stop();
    randomqueuemessagepicker.stop();
    roundrobinqueuemessagepicker.stop();
    topicpicker.stop();*/
    /*try {
       mbs.invoke(new ObjectName("com.app.server:type=SARDeployer"), "destroyDeployer", null, null);
    } catch (InstanceNotFoundException | MalformedObjectNameException
    | ReflectionException | MBeanException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
    }*/
    //earDeployer.stop();
    System.exit(0);
}

From source file:com.netflix.iep.http.RxHttpTest.java

@Test
public void connectTimeout() throws Exception {
    // Pick a free port with no server running
    ServerSocket ss = new ServerSocket(0);
    int serverPort = ss.getLocalPort();
    ss.close();/*from  w ww  .j a  v a 2 s.  c  o  m*/

    set(client + ".niws.client.ConnectTimeout", "100");
    int code = 200;
    statusCode.set(code);

    final CountDownLatch latch = new CountDownLatch(1);
    final AtomicReference<Throwable> throwable = new AtomicReference<>();
    rxHttp.get("niws://test/http://localhost:" + serverPort + "/empty").subscribe(Actions.empty(),
            new Action1<Throwable>() {
                @Override
                public void call(Throwable t) {
                    throwable.set(t);
                    latch.countDown();
                }
            }, new Action0() {
                @Override
                public void call() {
                    latch.countDown();
                }
            });

    latch.await();
    Assert.assertTrue(throwable.get() instanceof ConnectException);
}

From source file:eu.stratosphere.nephele.taskmanager.TaskManager.java

private int getAvailablePort() {
    ServerSocket serverSocket = null;
    int port = 0;
    for (int i = 0; i < 50; i++) {
        try {/* ww w  .j  a va 2  s  .c om*/
            serverSocket = new ServerSocket(0);
            port = serverSocket.getLocalPort();
            if (port != 0) {
                serverSocket.close();
                break;
            }
        } catch (IOException e) {
            LOG.debug("Unable to allocate port " + e.getMessage(), e);
        }
    }
    if (!serverSocket.isClosed()) {
        try {
            serverSocket.close();
        } catch (IOException e) {
            LOG.debug("error closing port", e);
        }
    }
    return port;
}

From source file:nl.nn.adapterframework.http.AuthSSLProtocolSocketFactoryBase.java

public ServerSocket createServerSocket(int port) throws IOException {
    return new ServerSocket(port);
}

From source file:com.mirth.connect.server.Mirth.java

/**
 * Test a port to see if it is already in use.
 * //from   w  ww.  j a  v  a  2  s  .com
 * @param port
 *            The port to test.
 * @param name
 *            A friendly name to display in case of an error.
 * @return
 */
private boolean testPort(String host, String port, String name) {
    ServerSocket socket = null;

    try {
        if (StringUtils.equals(host, "0.0.0.0") || StringUtils.equals(host, "::")) {
            socket = new ServerSocket(Integer.parseInt(port));
        } else {
            socket = new ServerSocket(Integer.parseInt(port), 0, InetAddress.getByName(host));
        }
    } catch (NumberFormatException ex) {
        logger.error(name + " port is invalid: " + port);
        return false;
    } catch (IOException ex) {
        logger.error(name + " port is already in use: " + port);
        return false;
    } finally {
        if (socket != null) {
            try {
                socket.close();
            } catch (IOException e) {
                logger.error("Could not close test socket for " + name + ": " + port);
                return false;
            }
        }
    }

    return true;
}

From source file:test.integ.be.agiv.security.IPSTSTest.java

private static int getFreePort() throws Exception {
    ServerSocket serverSocket = new ServerSocket(0);
    int port = serverSocket.getLocalPort();
    serverSocket.close();//www.j a  va  2s . co  m
    return port;
}