Example usage for java.util.concurrent LinkedBlockingQueue LinkedBlockingQueue

Introduction

In this page you can find the example usage for java.util.concurrent LinkedBlockingQueue LinkedBlockingQueue.

Prototype

public LinkedBlockingQueue() 

Source Link

Document

Creates a LinkedBlockingQueue with a capacity of Integer#MAX_VALUE .

Usage

From source file:Test.java

public static void main(String[] args) throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<String>();
    FileOutputStream fos = new FileOutputStream("out.log");
    DataOutputStream dos = new DataOutputStream(fos);
    while (!queue.isEmpty()) {
        dos.writeUTF(queue.take());/*from  w  w  w  .  j  a  va 2s .  c om*/
    }
}

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From source file:PoolSize.java

public static void main(String[] args) {
    ThreadPoolExecutor executor = new ThreadPoolExecutor(10, 20, 60L, TimeUnit.SECONDS,
            new LinkedBlockingQueue());
    System.out.println(executor.getPoolSize());
}

---

From source file:Test.java

public static void main(String[] args) throws InterruptedException {
    BlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>();
    for (int i = 0; i < 10; i++) {
        final int localI = i;
        queue.add(new Runnable() {
            public void run() {
                doExpensiveOperation(localI);
            }/*  w w w .j a v a 2  s  .  c o m*/
        });
    }
    ThreadPoolExecutor executor = new ThreadPoolExecutor(10, 10, 1000, TimeUnit.MILLISECONDS, queue);
    executor.prestartAllCoreThreads();
    executor.shutdown();
    executor.awaitTermination(100000, TimeUnit.SECONDS);
}

---

From source file:MainClass.java

public static void main(String[] args) {
    int nTasks = 5;
    long n = 1000L;
    int tpSize = 10;

    ThreadPoolExecutor tpe = new ThreadPoolExecutor(tpSize, tpSize, 50000L, TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<Runnable>());

    Task[] tasks = new Task[nTasks];
    for (int i = 0; i < nTasks; i++) {
        tasks[i] = new Task(n, "Task " + i);
        tpe.execute(tasks[i]);/*  w w  w .  ja v a  2 s.c om*/
    }
    tpe.shutdown();
}

---

From source file:PrepareProduction.java

public static void main(String[] args) throws Exception {
    BlockingQueue<String> q = new LinkedBlockingQueue<String>();
    Thread p1 = new Thread(new PrepareProduction(q));
    Thread c1 = new Thread(new DoProduction(q));
    p1.start();//from  ww  w . ja  v a 2  s  .com
    c1.start();
    p1.join();
    c1.join();
}

---

From source file:httpscheduler.HttpScheduler.java

/**
 * @param args the command line arguments
 * @throws java.lang.Exception// ww  w  .  ja  v a2 s.co  m
 */

public static void main(String[] args) throws Exception {

    if (args.length != 2) {
        System.err.println("Invalid command line parameters for worker");
        System.exit(-1);
    }

    int fixedExecutorSize = 4;

    //Creating fixed size executor
    ThreadPoolExecutor taskCommExecutor = new ThreadPoolExecutor(fixedExecutorSize, fixedExecutorSize, 0L,
            TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>());
    // Used for late binding
    JobMap jobMap = new JobMap();

    // Set port number
    int port = Integer.parseInt(args[0]);

    // Set worker mode
    String mode = args[1].substring(2);

    // Set up the HTTP protocol processor
    HttpProcessor httpproc = HttpProcessorBuilder.create().add(new ResponseDate())
            .add(new ResponseServer("Test/1.1")).add(new ResponseContent()).add(new ResponseConnControl())
            .build();

    // Set up request handlers
    UriHttpRequestHandlerMapper reqistry = new UriHttpRequestHandlerMapper();
    // Different handlers for late binding and generic cases
    if (mode.equals("late"))
        reqistry.register("*", new LateBindingRequestHandler(taskCommExecutor, jobMap));
    else
        reqistry.register("*", new GenericRequestHandler(taskCommExecutor, mode));

    // Set up the HTTP service
    HttpService httpService = new HttpService(httpproc, reqistry);

    SSLServerSocketFactory sf = null;

    // create a thread to listen for possible client available connections
    Thread t;
    if (mode.equals("late"))
        t = new LateBindingRequestListenerThread(port, httpService, sf);
    else
        t = new GenericRequestListenerThread(port, httpService, sf);
    System.out.println("Request Listener Thread created");
    t.setDaemon(false);
    t.start();

    // main thread should wait for the listener to exit before shutdown the
    // task executor pool
    t.join();

    // shutdown task executor pool and wait for any taskCommExecutor thread
    // still running
    taskCommExecutor.shutdown();
    while (!taskCommExecutor.isTerminated()) {
    }

    System.out.println("Finished all task communication executor threads");
    System.out.println("Finished all tasks");

}

---

From source file:org.sourcepit.docker.watcher.Main.java

public static void main(String[] args) throws IOException {

    final HttpClientFactory clientFactory = new HttpClientFactory() {
        @Override//www.j  ava2 s  .  c  o  m
        public CloseableHttpClient createHttpClient() {
            return HttpClients.createDefault();
        }
    };

    final String dockerDaemonUri = "http://192.168.56.101:2375";
    final String consulAgentUri = "http://192.168.56.101:8500";

    final BlockingQueue<List<JsonObject>> queue = new LinkedBlockingQueue<>();

    final ConsulForwarder consulForwarder = new ConsulForwarder(clientFactory.createHttpClient(),
            consulAgentUri);

    final Thread containerStateDispatcher = new Thread("Consul Forwarder") {
        @Override
        public void run() {
            while (true) {
                try {
                    consulForwarder.forward(queue.take());
                } catch (InterruptedException e) {
                    break;
                } catch (Exception e) {
                    LOG.error("Error while forwarding Docker container state to Consul.", e);
                }
            }
        }
    };
    containerStateDispatcher.start();

    final DockerWatcher watcher = new DockerWatcher(clientFactory, dockerDaemonUri) {
        @Override
        protected void handle(List<JsonObject> containerState) {
            queue.add(containerState);
        }
    };

    Runtime.getRuntime().addShutdownHook(new Thread() {
        @Override
        public void run() {
            watcher.stop();
            while (containerStateDispatcher.isAlive()) {
                containerStateDispatcher.interrupt();
                try {
                    Thread.sleep(100L);
                } catch (InterruptedException e) {
                }
            }
        }
    });

    watcher.start();
}

---

From source file:org.sourcepit.consul.forwarder.Main.java

public static void main(String[] args) {

    final String dockerUri = "http://192.168.56.101:2375";
    final String consulUri = "http://192.168.56.101:8500";

    final int fetchConsulStateInterval = 30;
    final int fetchDockerStateInterval = 30;
    final int dispatchItemsInterval = 2;
    final int requestDockerStateDelay = 5;

    PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager();
    connManager.setDefaultMaxPerRoute(10);
    final HttpClient httpClient = HttpClients.createMinimal(connManager);

    final BlockingQueue<JsonObject> queue = new LinkedBlockingQueue<>();

    final FetchConsulStateCmd fetchConsulStateCmd = new FetchConsulStateCmd(httpClient, consulUri) {
        @Override/*from  w  w  w  .j a v a 2s  .  c  om*/
        protected void doHandle(JsonObject consulState) {
            final JsonObject item = createItem("ConsulState", consulState);
            LOG.debug(item.toString());
            queue.add(item);
        }

    };

    final FetchDockerStateCmd fetchDockerStateCmd = new FetchDockerStateCmd(httpClient, dockerUri) {
        @Override
        protected void doHandle(JsonArray dockerState) {
            final JsonObject item = createItem("DockerState", dockerState);
            LOG.debug(item.toString());
            queue.add(item);
        }
    };

    final ConsulForwarderState forwarderState = new ConsulForwarderState();

    final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
    scheduler.scheduleAtFixedRate(fetchConsulStateCmd, 0, fetchConsulStateInterval, TimeUnit.SECONDS);
    scheduler.scheduleAtFixedRate(fetchDockerStateCmd, 0, fetchDockerStateInterval, TimeUnit.SECONDS);
    scheduler.scheduleAtFixedRate(new DispatchItemsCmd(queue) {
        @Override
        protected void handleDockerState(JsonArray dockerState) {
            forwarderState.applyDockerState(dockerState);
        }

        @Override
        protected void handleDockerEvents(JsonArray dockerEvents) {
            // trigger docker state update
            scheduler.schedule(fetchDockerStateCmd, requestDockerStateDelay, TimeUnit.SECONDS);
        }

        @Override
        protected void handleConsulState(JsonObject consulState) {
            forwarderState.applyConsulState(consulState);
        }
    }, 0, dispatchItemsInterval, TimeUnit.SECONDS);

    final DockerEventObserver eventObserver = new DockerEventObserver(httpClient, dockerUri) {
        @Override
        protected void handle(JsonObject event) {
            queue.add(createItem("DockerEvent", event));
        }
    };

    final Thread eventObserverThread = new Thread(eventObserver, "Docker Event Observer") {
        @Override
        public void interrupt() {
            eventObserver.die();
            super.interrupt();
        }
    };
    eventObserverThread.start();
}

---

From source file:com.stehno.sanctuary.core.Sanctuary.java

public static void main(String[] args) throws Exception {
    log.info("Starting run...");

    JdbcTemplate jdbcTemplate = new JdbcTemplate(createDataSource());

    // FIXME: AndroidLocalStore
    LocalStore localStore = new JdbcLocalStore(jdbcTemplate);
    localStore.init();/*from w ww. jav a2  s  . com*/

    // FIXME: FileSystemRemoteStore, S3RemoteStore, AndroidS3LocalStore?
    // FIXME: remote keys
    RemoteStore remoteStore = new S3RemoteStore("yourkey", "yourotherkey");
    remoteStore.init();

    DirectoryScanner scanner = new DefaultDirectoryScanner(localStore);

    ExecutorService executor = new ThreadPoolExecutor(2, 2, 1, TimeUnit.MINUTES,
            new LinkedBlockingQueue<Runnable>());
    FileArchiver archiver = new DefaultFileArchiver(executor, localStore, remoteStore);

    ChangeSet changeSet = scanner.scanDirectory(WORKING_DIR);

    // FIXME: allow review of changeset here (confirm/cancel)
    log.info("Changes: " + changeSet);

    MessageSet messageSet = archiver.archiveChanges(changeSet);

    // FIXME: allow review of messages here
    log.info("Messages" + messageSet);

    remoteStore.destroy();
    localStore.destroy();
}

---

From source file:com.curecomp.primefaces.migrator.PrimefacesMigration.java

public static void main(String[] args) throws Exception {
    // Let's use some colors :)
    //        AnsiConsole.systemInstall();
    CommandLineParser cliParser = new BasicParser();
    CommandLine cli = null;//from   ww w  .jav  a2s  .  c o  m
    try {
        cli = cliParser.parse(OPTIONS, args);
    } catch (ParseException e) {
        printHelp();
    }
    if (!cli.hasOption("s")) {
        printHelp();
    }

    String sourcePattern;
    if (cli.hasOption("p")) {
        sourcePattern = cli.getOptionValue("p");
    } else {
        sourcePattern = DEFAULT_SOURCE_PATTERN;
    }

    String defaultAnswer;
    if (cli.hasOption("default-answer")) {
        defaultAnswer = cli.getOptionValue("default-answer");
    } else {
        defaultAnswer = DEFAULT_DEFAULT_PROMPT_ANSWER;
    }

    boolean defaultAnswerYes = defaultAnswer.equalsIgnoreCase("y");
    boolean quiet = cli.hasOption("q");
    boolean testWrite = cli.hasOption("t");
    Path sourceDirectory = Paths.get(cli.getOptionValue("s")).toAbsolutePath();
    // Since we use IO we will have some blocking threads hanging around
    int threadCount = Runtime.getRuntime().availableProcessors() * 2;
    ThreadPoolExecutor threadPool = new ThreadPoolExecutor(threadCount, threadCount, 0L, TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<>());
    BlockingQueue<WidgetVarLocation> foundUsages = new LinkedBlockingQueue<>();
    BlockingQueue<WidgetVarLocation> unusedOrAmbiguous = new LinkedBlockingQueue<>();
    BlockingQueue<WidgetVarLocation> skippedUsages = new LinkedBlockingQueue<>();
    List<Future<?>> futures = new ArrayList<>();

    findWidgetVars(sourceDirectory, sourcePattern, threadPool).forEach(widgetVarLocation -> {
        // We can't really find usages of widget vars that use EL expressions :(
        if (widgetVarLocation.widgetVar.contains("#")) {
            unusedOrAmbiguous.add(widgetVarLocation);
            return;
        }

        try {
            FileActionVisitor visitor = new FileActionVisitor(sourceDirectory, sourcePattern,
                    sourceFile -> futures.add(threadPool.submit((Callable<?>) () -> {
                        findWidgetVarUsages(sourceFile, widgetVarLocation, foundUsages, skippedUsages,
                                unusedOrAmbiguous);
                        return null;
                    })));

            Files.walkFileTree(sourceDirectory, visitor);
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
    });

    awaitAll(futures);

    new TreeSet<>(skippedUsages).forEach(widgetUsage -> {
        int startIndex = widgetUsage.columnNr;
        int endIndex = startIndex + widgetUsage.widgetVar.length();
        String relativePath = widgetUsage.location.toAbsolutePath().toString()
                .substring(sourceDirectory.toString().length());
        String previous = replace(widgetUsage.line, startIndex, endIndex,
                Ansi.ansi().bold().fg(Ansi.Color.RED).a(widgetUsage.widgetVar).reset().toString());
        System.out.println("Skipped " + relativePath + " at line " + widgetUsage.lineNr + " and col "
                + widgetUsage.columnNr + " for widgetVar '" + widgetUsage.widgetVar + "'");
        System.out.println("\t" + previous);
    });

    Map<WidgetVarLocation, List<WidgetVarLocation>> written = new HashMap<>();

    new TreeSet<>(foundUsages).forEach(widgetUsage -> {
        WidgetVarLocation key = new WidgetVarLocation(null, widgetUsage.location, widgetUsage.lineNr, -1, null);
        List<WidgetVarLocation> writtenList = written.get(key);
        int existing = writtenList == null ? 0 : writtenList.size();
        int startIndex = widgetUsage.columnNr;
        int endIndex = startIndex + widgetUsage.widgetVar.length();
        String relativePath = widgetUsage.location.toAbsolutePath().toString()
                .substring(sourceDirectory.toString().length());
        String next = replace(widgetUsage.line, startIndex, endIndex, Ansi.ansi().bold().fg(Ansi.Color.RED)
                .a("PF('" + widgetUsage.widgetVar + "')").reset().toString());
        System.out
                .println(relativePath + " at line " + widgetUsage.lineNr + " and col " + widgetUsage.columnNr);
        System.out.println("\t" + next);
        System.out.print("Replace (Y/N)? [" + (defaultAnswerYes ? "Y" : "N") + "]: ");

        String input;

        if (quiet) {
            input = "";
            System.out.println();
        } else {
            try {
                do {
                    input = in.readLine();
                } while (input != null && !input.isEmpty() && !"y".equalsIgnoreCase(input)
                        && !"n".equalsIgnoreCase(input));
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        }

        if (input == null) {
            System.out.println("Aborted!");
        } else if (input.isEmpty() && defaultAnswerYes || !input.isEmpty() && !"n".equalsIgnoreCase(input)) {
            System.out.println("Replaced!");
            System.out.print("\t");
            if (writtenList == null) {
                writtenList = new ArrayList<>();
                written.put(key, writtenList);
            }

            writtenList.add(widgetUsage);
            List<String> lines;
            try {
                lines = Files.readAllLines(widgetUsage.location);
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }

            try (OutputStream os = testWrite ? new ByteArrayOutputStream()
                    : Files.newOutputStream(widgetUsage.location);
                    PrintWriter pw = new PrintWriter(new OutputStreamWriter(os, StandardCharsets.UTF_8))) {
                String line;

                for (int i = 0; i < lines.size(); i++) {
                    int lineNr = i + 1;
                    line = lines.get(i);

                    if (lineNr == widgetUsage.lineNr) {
                        int begin = widgetUsage.columnNr + (testWrite ? 0 : existing * 6);
                        int end = begin + widgetUsage.widgetVar.length();
                        String newLine = replace(line, begin, end, "PF('" + widgetUsage.widgetVar + "')",
                                false);

                        if (testWrite) {
                            System.out.println(newLine);
                        } else {
                            pw.println(newLine);
                        }
                    } else {
                        if (!testWrite) {
                            pw.println(line);
                        }
                    }
                }
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        } else {
            System.out.println("Skipped!");
        }
    });

    new TreeSet<>(unusedOrAmbiguous).forEach(widgetUsage -> {
        int startIndex = widgetUsage.columnNr;
        int endIndex = startIndex + widgetUsage.widgetVar.length();
        String relativePath = widgetUsage.location.toAbsolutePath().toString()
                .substring(sourceDirectory.toString().length());
        String previous = replace(widgetUsage.line, startIndex, endIndex,
                Ansi.ansi().bold().fg(Ansi.Color.RED).a(widgetUsage.widgetVar).reset().toString());
        System.out.println("Skipped unused or ambiguous " + relativePath + " at line " + widgetUsage.lineNr
                + " and col " + widgetUsage.columnNr);
        System.out.println("\t" + previous);
    });

    threadPool.shutdown();
}

---

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