Example usage for java.util.concurrent ConcurrentHashMap ConcurrentHashMap

List of usage examples for java.util.concurrent ConcurrentHashMap ConcurrentHashMap

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Introduction

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

Prototype

public ConcurrentHashMap()

Source Link

Document

Creates a new, empty map with the default initial table size (16).

Usage

From source file:com.hortonworks.streamline.streams.notification.service.NotificationQueueHandler.java

public NotificationQueueHandler(int nThreads) {
    // TODO: evaluate ThreadPoolExecutor with bounded queue size
    executorService = Executors.newFixedThreadPool(nThreads);
    taskMap = new ConcurrentHashMap<>();
}

From source file:com.espertech.esper.core.InternalEventRouterImpl.java

/**
 * Ctor./*  w  w w .j ava2 s .  c o m*/
 */
public InternalEventRouterImpl() {
    this.preprocessors = new ConcurrentHashMap<EventType, NullableObject<InternalEventRouterPreprocessor>>();
    this.descriptors = new LinkedHashMap<UpdateDesc, IRDescEntry>();
}

From source file:com.openteach.diamond.network.waverider.session.DefaultSessionManager.java

public DefaultSessionManager(WaveriderConfig config) {
    this.config = config;
    idleSessionList = new CopyOnWriteArrayList<DefaultSession>();
    sessionMap = new ConcurrentHashMap<Long, DefaultSession>();
}

From source file:com.bluepixel.security.manager.Server.java

private void generateKey() {
    try {/*from   w w  w . j  a  v a 2s.  c  om*/
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance(DEFAULT_ALGORITHM);
        keyGen.initialize(DEFAULT_KEY_LENGTH);
        KeyPair keypair = keyGen.generateKeyPair();
        PublicKey pbKey = keypair.getPublic();
        PrivateKey piKey = keypair.getPrivate();

        publicKey = Base64.encodeWebSafe(pbKey.getEncoded(), false);
        privateKey = Base64.encodeWebSafe(piKey.getEncoded(), false);

        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");

        cipher.init(Cipher.ENCRYPT_MODE, piKey);

        secretKeys = new ConcurrentHashMap<String, String>();
        String[] randomKeys = generateRandomWords(10);
        for (String key : randomKeys) {
            String cipherText = Base64.encodeWebSafe(cipher.doFinal(key.getBytes()), false);
            secretKeys.put(key, cipherText);
        }
    } catch (NoSuchAlgorithmException e) {
    } catch (InvalidKeyException e) {
    } catch (NoSuchPaddingException e) {
    } catch (IllegalBlockSizeException e) {
    } catch (BadPaddingException e) {
    }
}

From source file:com.twitter.distributedlog.feature.DynamicConfigurationFeatureProvider.java

public DynamicConfigurationFeatureProvider(String rootScope, DistributedLogConfiguration conf,
        StatsLogger statsLogger) {/*from  w w w  .jav a  2 s.  c  om*/
    super(rootScope, conf, statsLogger);
    this.features = new ConcurrentHashMap<String, SettableFeature>();
    this.featuresConf = new ConcurrentBaseConfiguration();
    this.executorService = Executors.newSingleThreadScheduledExecutor(
            new ThreadFactoryBuilder().setNameFormat("DynamicConfigurationFeatureProvider-%d").build());
}

From source file:com.evon.injectTemplate.InjectTemplateFilter.java

@Override
public void init(FilterConfig filterConfig) throws ServletException {

    try {//from  www. j a  v a2 s  .  c  o m
        contentTypes = new ConcurrentHashMap<>();
        templates = new ConcurrentHashMap<>();

        TemplateConfig.load(filterConfig.getServletContext());

        printConfig();
    } catch (TemplateException e) {
        e.printStackTrace();
        throw new ServletException(e.getMessage(), e);
    }
}

From source file:com.clustercontrol.infra.view.action.DeleteInfraFileAction.java

@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
    InfraFileManagerView view = getView(event);
    if (view == null) {
        m_log.info("execute: view is null");
        return null;
    }//w ww.  j a  v  a  2  s .  c  o m

    List<String> fileIdList = getSelectedInfraFileIdList(view);
    if (fileIdList.isEmpty()) {
        return null;
    }

    StructuredSelection selection = null;
    if (view.getComposite().getTableViewer().getSelection() instanceof StructuredSelection) {
        selection = (StructuredSelection) view.getComposite().getTableViewer().getSelection();
    }
    if (selection == null || selection.isEmpty()) {
        return null;
    }
    Map<String, List<String>> map = new ConcurrentHashMap<String, List<String>>();
    for (Object object : selection.toList()) {
        String managerName = (String) ((ArrayList<?>) object).get(GetInfraFileManagerTableDefine.MANAGER_NAME);
        if (map.get(managerName) == null) {
            map.put(managerName, new ArrayList<String>());
        }
    }

    StringBuffer strFileIds = new StringBuffer();
    String tmpFileId = null;
    for (Object object : selection.toList()) {
        String managerName = (String) ((ArrayList<?>) object).get(GetInfraFileManagerTableDefine.MANAGER_NAME);
        tmpFileId = (String) ((ArrayList<?>) object).get(GetInfraFileManagerTableDefine.FILE_ID);
        map.get(managerName).add(tmpFileId);
        if (strFileIds.length() == 0) {
            strFileIds.append(tmpFileId);
        } else {
            strFileIds.append(", " + tmpFileId);
        }
    }

    if (MessageDialog.openConfirm(null, Messages.getString("confirmed"),
            Messages.getString("message.infra.confirm.action",
                    new Object[] { Messages.getString("file"), Messages.getString("delete"), strFileIds }))) {

        Map<String, String> errMsg = new ConcurrentHashMap<String, String>();
        for (Map.Entry<String, List<String>> entry : map.entrySet()) {
            String managerName = entry.getKey();
            InfraEndpointWrapper wrapper = InfraEndpointWrapper.getWrapper(managerName);
            try {
                wrapper.deleteInfraFileList(entry.getValue());
            } catch (Exception e) {
                m_log.error(e);
                errMsg.put(managerName, HinemosMessage.replace(e.getMessage()));
            }
        }

        if (errMsg.isEmpty()) {
            String action = Messages.getString("delete");
            InfraFileUtil.showSuccessDialog(action, strFileIds.toString());
        } else {
            UIManager.showMessageBox(errMsg, true);
        }
        // ?
        view.update();
    }

    return null;
}

From source file:com.netflix.zeno.diff.TypeDiffOperation.java

@SuppressWarnings("unchecked")
public TypeDiff<T> performDiff(DiffSerializationFramework framework, Iterable<T> fromState, Iterable<T> toState,
        int numThreads) {
    Map<Object, T> fromStateObjects = new HashMap<Object, T>();

    for (T obj : fromState) {
        fromStateObjects.put(instruction.getKey(obj), obj);
    }// w  w w .  j a  v a  2 s . c o  m

    ArrayList<List<T>> perProcessorWorkList = new ArrayList<List<T>>(numThreads); // each entry is a job
    for (int i = 0; i < numThreads; ++i) {
        perProcessorWorkList.add(new ArrayList<T>());
    }

    Map<Object, Object> toStateKeys = new ConcurrentHashMap<Object, Object>();

    int toIncrCount = 0;
    for (T toObject : toState) {
        perProcessorWorkList.get(toIncrCount % numThreads).add(toObject);
        toIncrCount++;
    }

    ExecutorService executor = Executors.newFixedThreadPool(numThreads, new ThreadFactory() {
        @Override
        public Thread newThread(Runnable r) {
            final Thread thread = new Thread(r, "TypeDiff_" + instruction.getTypeIdentifier());
            thread.setDaemon(true);
            return thread;
        }
    });

    try {
        ArrayList<Future<TypeDiff<T>>> workResultList = new ArrayList<Future<TypeDiff<T>>>(
                perProcessorWorkList.size());
        for (final List<T> workList : perProcessorWorkList) {
            if (workList != null && !workList.isEmpty()) {
                workResultList.add(executor.submit(new TypeDiffCallable<T>(framework, instruction,
                        fromStateObjects, toStateKeys, workList)));
            }
        }

        TypeDiff<T> mergedDiff = new TypeDiff<T>(instruction.getTypeIdentifier());
        for (final Future<TypeDiff<T>> future : workResultList) {
            try {
                TypeDiff<T> typeDiff = future.get();
                mergeTypeDiff(mergedDiff, typeDiff);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

        for (Map.Entry<Object, T> entry : fromStateObjects.entrySet()) {
            mergedDiff.incrementFrom();
            if (!toStateKeys.containsKey(entry.getKey()))
                mergedDiff.addExtraInFrom(entry.getValue());
        }

        return mergedDiff;

    } finally {
        executor.shutdownNow();
    }
}

From source file:org.springframework.yarn.integration.convert.MindHolderToObjectConverter.java

/**
 * Instantiates a new mind holder to object converter.
 *
 * @param objectMapper the object mapper
 * @param basePackage the array of base packages
 *///ww w .  j  a va  2  s.c o  m
public MindHolderToObjectConverter(ObjectMapper objectMapper, String basePackage[]) {
    this.objectMapper = objectMapper;
    this.basePackage = basePackage;
    this.classCache = new ConcurrentHashMap<String, Class<? extends BaseObject>>();
}

From source file:com.digitalpebble.storm.crawler.metrics.DebugMetricsConsumer.java

@Override
public void prepare(Map stormConf, Object registrationArgument, TopologyContext context,
        IErrorReporter errorReporter) {/*from   www  . j a va2 s.  c o  m*/
    this.errorReporter = errorReporter;
    this.metrics = new ConcurrentHashMap<String, Number>();
    this.metrics_metadata = new ConcurrentHashMap<String, Map<String, Object>>();

    try {
        // TODO Config file not tested
        final String PORT_CONFIG_STRING = "topology.metrics.consumers.debug.servlet.port";
        Integer port = (Integer) stormConf.get(PORT_CONFIG_STRING);
        if (port == null) {
            log.warn("Metrics debug servlet's port not specified, defaulting to 7070. You can specify it via "
                    + PORT_CONFIG_STRING + " in storm.yaml");
            port = 7070;
        }
        server = startServlet(port);
    } catch (Exception e) {
        log.error("Failed to start metrics server", e);
        throw new AssertionError(e);
    }
}