Example usage for java.lang Thread yield

Introduction

In this page you can find the example usage for java.lang Thread yield.

Prototype

public static native void yield();

Source Link

Document

A hint to the scheduler that the current thread is willing to yield its current use of a processor.

Usage

From source file:com.esminis.server.mariadb.server.MariaDbServerLauncher.java

void initializeDataDirectory(Context context, File binary, File root) throws IOException {
    File[] files = root.listFiles();
    if (files != null && files.length > 0) {
        return;//from w w w. j a  v  a  2 s  .co  m
    }
    synchronized (lock) {
        final List<String> environment = getEnvironment();
        final List<String> command = createCommandInternal(context, binary, root);
        Collections.addAll(command, "--bootstrap", "--log-warnings=0", "--max_allowed_packet=8M",
                "--net_buffer_length=16K");
        final File dataMysqlDirectory = new File(root, "mysql");
        if (dataMysqlDirectory.isDirectory()) {
            return;
        }
        if (!dataMysqlDirectory.mkdirs()) {
            throw new IOException("Cannot create directory: " + dataMysqlDirectory.getAbsolutePath());
        }
        final Process process = Runtime.getRuntime().exec(command.toArray(new String[command.size()]),
                environment.toArray(new String[environment.size()]), root);
        final Object[] finishedWithError = { null };
        try {
            final OutputStream stream = process.getOutputStream();
            Observable.create(new Observable.OnSubscribe<Void>() {
                @Override
                public void call(Subscriber<? super Void> subscriber) {
                    final InputStream inputStream = process.getErrorStream();
                    String data = "";
                    for (;;) {
                        synchronized (finishedWithError) {
                            if (finishedWithError[0] != null) {
                                break;
                            }
                        }
                        try {
                            int available = inputStream.available();
                            if (available > 0) {
                                for (int i = 0; i < available; i++) {
                                    data += (char) inputStream.read();
                                }
                                if (getFreeSpace(dataMysqlDirectory) < 1024L * 1024L
                                        || data.contains("No space left on device")) {
                                    synchronized (finishedWithError) {
                                        finishedWithError[0] = new IOException("No space left on device");
                                    }
                                    process.destroy();
                                    break;
                                }
                            }
                        } catch (Throwable ignored) {
                        }
                        Thread.yield();
                    }
                    subscriber.onCompleted();
                }
            }).subscribeOn(Schedulers.newThread()).subscribe();
            writeToStream(stream, "use mysql;\n");
            writeToStream(stream, context, "sql/mysql_system_tables.sql");
            writeToStream(stream, context, "sql/mysql_performance_tables.sql");
            writeToStream(stream, context, "sql/mysql_system_tables_data.sql");
            writeToStream(stream, context, "sql/add_root_from_any_host.sql");
            writeToStream(stream, context, "sql/fill_help_tables.sql");
            writeToStream(stream, "exit;\n");
            process.waitFor();
        } catch (Throwable e) {
            FileUtils.deleteDirectory(root);
            //noinspection ResultOfMethodCallIgnored
            root.mkdirs();
            synchronized (finishedWithError) {
                if (finishedWithError[0] != null && finishedWithError[0] instanceof IOException) {
                    throw (IOException) finishedWithError[0];
                } else {
                    throw new IOException(
                            e.toString() + "\n\nLog:\n" + IOUtils.toString(process.getErrorStream()));
                }
            }
        } finally {
            synchronized (finishedWithError) {
                if (finishedWithError[0] == null) {
                    finishedWithError[0] = true;
                }
            }
        }
    }
}

---

From source file:com.callidusrobotics.swing.SwingConsole.java

@SuppressWarnings("PMD.NullAssignment")
private char getKeyTyped() {
    lastKeyTyped = null;/*from  w ww  .j  ava 2 s.c  o m*/
    while (lastKeyTyped == null) {
        Thread.yield();
    }

    return lastKeyTyped.getKeyChar();
}

---

From source file:org.apache.hadoop.hbase.stargate.TestRowResource.java

Response putValueXML(String table, String row, String column, String value) throws IOException, JAXBException {
    StringBuilder path = new StringBuilder();
    path.append('/');
    path.append(table);/*from   w  ww .  ja  v  a2s.c  o  m*/
    path.append('/');
    path.append(row);
    path.append('/');
    path.append(column);
    RowModel rowModel = new RowModel(row);
    rowModel.addCell(new CellModel(Bytes.toBytes(column), Bytes.toBytes(value)));
    CellSetModel cellSetModel = new CellSetModel();
    cellSetModel.addRow(rowModel);
    StringWriter writer = new StringWriter();
    marshaller.marshal(cellSetModel, writer);
    Response response = client.put(path.toString(), MIMETYPE_XML, Bytes.toBytes(writer.toString()));
    Thread.yield();
    return response;
}

---

From source file:nl.b3p.viewer.util.databaseupdate.ScriptRunner.java

/**
 * Runs an SQL script (read in using the Reader parameter) using the
 * connection passed in//w  w w .  j a v  a2 s. c  o m
 *
 * @param conn - the connection to use for the script
 * @param reader - the source of the script
 * @throws SQLException if any SQL errors occur
 * @throws IOException if there is an error reading from the Reader
 */
private void runScript(Connection conn, Reader reader) throws IOException, SQLException {
    StringBuffer command = null;
    try {
        LineNumberReader lineReader = new LineNumberReader(reader);
        String line = null;
        while ((line = lineReader.readLine()) != null) {
            if (command == null) {
                command = new StringBuffer();
            }
            String trimmedLine = line.trim();
            if (trimmedLine.startsWith("--")) {
                log.debug(trimmedLine);
            } else if (trimmedLine.length() < 1 || trimmedLine.startsWith("//")) {
                // Do nothing
            } else if (trimmedLine.length() < 1 || trimmedLine.startsWith("--")) {
                // Do nothing
            } else if (!fullLineDelimiter && trimmedLine.endsWith(getDelimiter())
                    || fullLineDelimiter && trimmedLine.equals(getDelimiter())) {
                command.append(line.substring(0, line.lastIndexOf(getDelimiter())));
                command.append(" ");
                Statement statement = conn.createStatement();

                log.debug(command);

                boolean hasResults = false;
                if (stopOnError) {
                    hasResults = statement.execute(command.toString());
                } else {
                    try {
                        statement.execute(command.toString());
                    } catch (SQLException e) {
                        e.fillInStackTrace();
                        log.error("Error executing: " + command, e);
                    }
                }

                if (autoCommit && !conn.getAutoCommit()) {
                    conn.commit();
                }

                ResultSet rs = statement.getResultSet();
                if (hasResults && rs != null) {
                    ResultSetMetaData md = rs.getMetaData();
                    int cols = md.getColumnCount();
                    for (int i = 0; i < cols; i++) {
                        String name = md.getColumnLabel(i);
                        log.debug(name + "\t");
                    }
                    while (rs.next()) {
                        for (int i = 0; i < cols; i++) {
                            String value = rs.getString(i);
                            log.debug(value + "\t");
                        }
                    }
                }

                command = null;
                try {
                    statement.close();
                } catch (Exception e) {
                    // Ignore to workaround a bug in Jakarta DBCP
                }
                Thread.yield();
            } else {
                command.append(line);
                command.append(" ");
            }
        }
        if (!autoCommit) {
            conn.commit();
        }
    } catch (SQLException e) {
        e.fillInStackTrace();
        log.error("Error executing: " + command, e);
        throw e;
    } catch (IOException e) {
        e.fillInStackTrace();
        log.error("Error executing: " + command, e);
        throw e;
    } finally {
        if (!this.autoCommit) {
            conn.rollback();
        }
    }
}

---

From source file:org.mule.transport.amqp.harness.AmqpTestClient.java

public GetResponse waitUntilGetMessageWithAmqp(String queue, long timeout)
        throws IOException, InterruptedException {
    long startTime = System.currentTimeMillis();

    while (System.currentTimeMillis() - startTime < timeout) {
        GetResponse getResponse = getMessageWithAmqp(queue);
        if (getResponse != null) {
            return getResponse;
        }//from  ww w  . j av a2s  . c o  m

        Thread.yield();
        Thread.sleep(250L);
    }

    return null;
}

---

From source file:org.coltram.nsd.bonjour.BonjourProcessor.java

public void callAction(JSONObject object, String serviceId, final AtomConnection connection, String callBack)
        throws JSONException {
    final DiscoveredZCService bonjourService = topManager.getServiceManager().findBonjourService(serviceId);
    if (bonjourService == null) {
        log.info("no service with id " + serviceId + " in callAction");
        return;//  w  w w  . j a  v a2  s.  c o  m
    }
    if (bonjourService.isLocal()) {
        // find the LocalExposedBonjourService in question
        LocalExposedBonjourService localcbs = LocalExposedBonjourService.getServiceById(serviceId);
        // send the info to that service
        object.put("originAtom", connection.getId());
        localcbs.notifyListeners(object.toString());
    } else {
        try {
            Socket socket = bonjourService.getSocket();
            int replyPort = -1;
            final InetAddress inetAddress = socket.getInetAddress();
            if (callBack != null) {
                // wait for reply on the same socket
                ServerSocket serverSocket = connection.getServerSocket();
                replyPort = serverSocket.getLocalPort();
                log.finer("start server for reply " + serverSocket.getLocalPort());
                new Thread(new ReplyListener(serverSocket, connection.getConnection())).start();
                Thread.yield();
            }
            String ia = inetAddress.toString();
            if (ia.startsWith("/")) {
                ia = ia.substring(1);
            }
            object.put("address", LocalHost.name);
            object.put("replyPort", replyPort + "");
            object.put("originAtom", connection.getId());
            DataOutputStream dos = bonjourService.getSocketDOS();
            dos.writeBytes(object.toString() + "\n");
            dos.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

---

From source file:com.idocbox.flame.Helios.java

/**
 * fire them!/*w w  w.  j  a v  a 2s .  c om*/
 * @param ds       data source.
 * @param dsSpliter data source spliter.
 * @param mapper   mapper.
 * @param reducer  reducer.
 * @return
 */
public Collector<Map<K, V>> fire(JobConfig<K, V, T> jobConfig) {

    long start = System.currentTimeMillis();

    Collector<Map<K, V>> resultCollector = null;

    // data source.
    DataSource<T> dataSource = jobConfig.getDataSource();
    // data source spliter.
    DataSourceSpliter<T> dataSourceSpliter = jobConfig.getDataSourceSpliter();
    // mapper worker. root mapper worker.
    MapperWorker<K, V, T> mapperWorker = jobConfig.getMapperWorker();
    // reducer worker. root reducer worker.
    ReducerWorker<K, V> reducerWorker = jobConfig.getReducerWorker();
    // mapper.
    Mapper<K, V, T> mapper = jobConfig.getMapper();
    // reducer.
    Reducer<K, V> reducer = jobConfig.getReducer();
    // keeper.
    Keeper<Collector<Map<K, V>>> keeper = jobConfig.getKeeper();

    // spliting phase.

    //split data source into serveral data source.
    log.info("spliting datasource ...");
    Map<String, DataSource<T>> dsMap = dataSourceSpliter.split(dataSource);

    long m1 = System.currentTimeMillis();
    long cost1 = m1 - start;
    double seconds1 = cost1 / 1000;
    log.info("spliting datasource: cost " + seconds1 + " s");

    // generate worker for mapper.create()
    if (null == dsMap || dsMap.isEmpty()) {
        log.info("Splited data source is empty! exit flame!");
        return null;
    }

    // mapping phase.

    // generate mapper worker.
    log.info("mapping && reducing ...");
    Set<String> dsKeys = dsMap.keySet();
    //mapper thread size.
    int mapperThreadSize = dsKeys.size() > jobConfig.getMaxMapperWorker() ? jobConfig.getMaxMapperWorker()
            : dsKeys.size();
    //create mapper worker thread pool.
    ExecutorService mapperWorkerThreadPool = Executors.newFixedThreadPool(mapperThreadSize);
    int dataSourceSize = 0;
    for (String key : dsKeys) {
        //create mapper worker baby.
        MapperWorker<K, V, T> mapperWorkerBaby = mapperWorker.create(key);

        //assign data source and run the worker.
        DataSource<T> dsUnit = dsMap.get(key);
        if (null != dsUnit) {
            //execute mapper work in thread pool.
            mapperWorkerThreadPool
                    .execute(new MapperWorkerRunable<K, V, T>(mapperWorkerBaby, dsUnit, mapper, keeper));

            dataSourceSize++;
        }
    }
    //shutdown executor service.
    mapperWorkerThreadPool.shutdown();

    // reduce phase.

    //generate reducer worker, assign mapper worker's compute result
    // to reducer worker.

    //mapper thread size.
    //create reducer worker thread pool.
    ExecutorService reducerWorkerThreadPool = Executors.newFixedThreadPool(jobConfig.getMaxReducerWorker());

    //get 2 collector, merge them into one, then passed to reducer.
    Set<ReducerWorker<K, V>> reducerWorkers = new HashSet<ReducerWorker<K, V>>();
    int j = 0;
    int expectedReducTime = dataSourceSize - 1;
    while (true) {//reduce while there is more than one element in set.
        if (mapperWorkerThreadPool.isTerminated()) {
            int count = keeper.count();
            if (count == 0) {//no mapped result.
                log.info("there is no result given by mapper. exit!");
                return null;
            }
        }
        if (j == expectedReducTime) {
            log.info("complete reduce. exit flame.");
            break;
        }

        Set<Collector<Map<K, V>>> collectors = new HashSet<Collector<Map<K, V>>>(2);
        collectors.add(keeper.take());
        collectors.add(keeper.take());

        // get an idle worker.
        ReducerWorker<K, V> reducerWorkerBaby = chooseIdle(reducerWorkers, reducerWorker);

        log.info("reducing, collector size = " + keeper.size());

        reducerWorkerThreadPool
                .execute(new ReducerWorkerRunnable<K, V>(reducerWorkerBaby, collectors, reducer, keeper));

        j++;
    }

    //shutdown reducer worker thread pool.
    reducerWorkerThreadPool.shutdown();

    // collect result phase.
    while (!reducerWorkerThreadPool.isTerminated()) {
        Thread.yield();
    }
    if (null != keeper && keeper.size() == 1) {
        resultCollector = keeper.poll();
    } else {// error occured.
        int size = 0;
        if (null != keeper) {
            size = keeper.size();
        }
        log.info("after reduce, the result collector is not expected! collector size is " + size);
    }

    //return result collector.
    long end = System.currentTimeMillis();
    long cost = end - m1;
    double seconds = cost / 1000;
    log.info("mapping & reducing: cost " + seconds + " s");

    return resultCollector;
}

---

From source file:com.indeed.lsmtree.recordlog.TestRecordLogDirectory.java

public void testRandomWithReader() throws Exception {
    final RecordLogDirectory<String> fileCache = createRecordLogDirectory();
    final AtomicInteger done = new AtomicInteger(8);
    for (int i = 0; i < 8; i++) {
        final int index = i;
        new Thread(new Runnable() {
            @Override//from   w  w w  .  jav  a2  s .c  om
            public void run() {
                try {
                    final Random r = new Random(index);
                    for (int i = 0; i < 10000; i++) {
                        int rand = r.nextInt(positions.size());
                        final RecordFile.Reader<String> reader = fileCache.reader(positions.get(rand));
                        assertTrue(reader.next());
                        assertEquals(reader.get(), strings.get(rand));
                        reader.close();
                    }
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } finally {
                    done.decrementAndGet();
                }
            }
        }).start();
    }
    while (done.get() > 0) {
        Thread.yield();
    }
    fileCache.close();
}

---

From source file:org.cobbzilla.util.mq.kestrel.KestrelBasicIT.java

private void awaitCommand(ControllableConsumer consumer, ControllableConsumer.Command command)
        throws InterruptedException {
    consumer.addCommand(command);//from   w w  w.  j  av  a2 s  . c  om
    while (consumer.getMostRecentCommand() != command) {
        synchronized (consumer.lock) {
            consumer.lock.wait(WAIT_TIME);
        }
        Thread.yield();
    }
}

---

From source file:nya.miku.wishmaster.http.recaptcha.RecaptchaAjax.java

private static String getChallengeInternal(final String address, final String data, CancellableTask task,
        final HttpHost proxy) throws Exception {
    Logger.d(TAG, "not intercepting; proxy: " + (proxy == null ? "disabled" : "enabled"));
    if (proxy != null) {
        Logger.d(TAG, "AJAX recaptcha not using (proxy and old API)");
        throw new Exception("proxy && old API");
        //? ? ? ?  reflection  ???, ..    js-antiddos, ?   ( noscript )
    }//from   www . ja  v  a2s.  c  o  m
    final Context context = MainApplication.getInstance();
    final Holder holder = new Holder();

    sHandler.post(new Runnable() {
        @SuppressLint("SetJavaScriptEnabled")
        @Override
        public void run() {
            holder.webView = new WebView(context);
            holder.webView.setWebViewClient(new WebViewClient() {
                @Override
                public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
                    handler.proceed();
                }

                @Override
                public void onLoadResource(WebView view, String url) {
                    String challenge = getChallengeFromImageUrl(url);
                    if (challenge != null)
                        holder.challenge = challenge;
                    super.onLoadResource(view, url);
                }
            });
            holder.webView.getSettings().setUserAgentString(CUSTOM_UA);
            holder.webView.getSettings().setJavaScriptEnabled(true);
            holder.webView.loadDataWithBaseURL(address, data, "text/html", "UTF-8", null);
        }
    });

    long startTime = System.currentTimeMillis();
    while (holder.challenge == null) {
        long time = System.currentTimeMillis() - startTime;
        if ((task != null && task.isCancelled()) || time > TIMEOUT)
            break;
        Thread.yield();
    }

    sHandler.post(new Runnable() {
        @Override
        public void run() {
            try {
                holder.webView.stopLoading();
                holder.webView.clearCache(true);
                holder.webView.destroy();
            } catch (Exception e) {
                Logger.e(TAG, e);
            }
        }
    });

    if (holder.challenge == null)
        throw new RecaptchaException("couldn't get Recaptcha Challenge (AJAX)");
    return holder.challenge;
}

---

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