Example usage for java.util.concurrent ConcurrentMap put

Introduction

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

Prototype

V put(K key, V value);

Source Link

Document

Associates the specified value with the specified key in this map (optional operation).

Usage

From source file:Main.java

public static void main(String[] args) {
    ConcurrentMap<String, String> cMap = new ConcurrentHashMap<>();
    cMap.put("A", "A");

    System.out.println("Concurrent Map: " + cMap);

    System.out.println(cMap.putIfAbsent("A", "1"));
    System.out.println(cMap.putIfAbsent("B", "B"));
    System.out.println(cMap.remove("A", "B"));
    System.out.println(cMap.replace("A", "B"));

    System.out.println("Concurrent Map: " + cMap);
}

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From source file:Test.java

private static void startUpdateThread(int i, final ConcurrentMap<Integer, String> concurrentMap) {
    Thread thread = new Thread(new Runnable() {
        public void run() {
            while (!Thread.interrupted()) {
                Random random = new Random();
                int randomInt = random.nextInt(20);
                concurrentMap.put(randomInt, UUID.randomUUID().toString());
            }/*from  w w w . j  a  v  a2s.c o  m*/
        }
    });
    thread.setName("Update Thread " + i);
    updateThreads.add(thread);
    thread.start();
}

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From source file:com.sm.store.cluster.Utils.java

public static ConcurrentMap<Short, String[]> buildServerMap(List<ClusterNodes> nodes) {
    ConcurrentMap<Short, String[]> map = new ConcurrentHashMap<Short, String[]>(nodes.size());
    for (ClusterNodes node : nodes) {
        map.put(node.getId(), node.getServerArray());
    }/*from ww  w . j  a  v  a 2  s  .  co m*/
    return map;
}

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From source file:com.sm.store.cluster.Utils.java

public static ConcurrentMap<Integer, Short> buildPartitionMap(List<ClusterNodes> nodes) {
    ConcurrentMap<Integer, Short> map = new ConcurrentHashMap<Integer, Short>(nodes.size());
    for (ClusterNodes node : nodes) {
        for (int i = 0; i < node.getPartitionArray().length; i++) {
            map.put(node.getPartitionArray()[i], node.getId());
        }//from  ww  w .  j a  v  a2 s. c o m
    }
    return map;
}

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From source file:org.unidle.test.LocationGenerator.java

private static ConcurrentMap<String, Boolean> locations() {

    final ConcurrentMap<String, Boolean> locations = new MapMaker().concurrencyLevel(THREADS).makeMap();

    for (KnownLocation location : KnownLocation.values()) {

        final String name = formatLocation(location.continent, location.country, location.subdivision,
                location.city);/*from  w w  w  .j ava  2s  .  c  om*/

        locations.put(name, !"".equals(location.address));
    }

    return locations;
}

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From source file:org.xdi.oxauth.model.common.AbstractAuthorizationGrant.java

private static <T extends AbstractToken> void put(ConcurrentMap<String, T> p_map, List<T> p_list) {
    p_map.clear();/*from  w w w. ja va 2  s . com*/
    if (p_list != null && !p_list.isEmpty()) {
        for (T t : p_list) {
            p_map.put(t.getCode(), t);
        }
    }
}

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From source file:com.networknt.light.rule.rule.AbstractRuleRule.java

public static void loadCompileCache() {
    String sql = "SELECT FROM Rule";
    Map<String, Object> compileMap = ServiceLocator.getInstance().getMemoryImage("compileMap");
    ConcurrentMap<String, String> cache = (ConcurrentMap<String, String>) compileMap.get("cache");
    if (cache == null) {
        cache = new ConcurrentLinkedHashMap.Builder<String, String>().maximumWeightedCapacity(10000).build();
        compileMap.put("cache", cache);
    }/*from w  w w.j  av a2s. c o  m*/
    OrientGraph graph = ServiceLocator.getInstance().getGraph();
    try {
        for (Vertex rule : (Iterable<Vertex>) graph.command(new OCommandSQL(sql)).execute()) {
            cache.put((String) rule.getProperty("ruleClass"), (String) rule.getProperty("sourceCode"));
        }
    } catch (Exception e) {
        logger.error("Exception:", e);
        throw e;
    } finally {
        graph.shutdown();
    }
}

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From source file:xbird.storage.io.RemoteVarSegments.java

public static void handleResponse(final TrackReadRequestMessage request, final ProtocolEncoderOutput out,
        final ConcurrentMap<String, FileChannel> fdCacheMap,
        final ConcurrentMap<String, IDescriptor> directoryCache) throws IOException {
    final String filePath = request.filePath;
    final long[] idxs = request.idxs;
    final int size = idxs.length;

    // look-up directory
    final File dataFile = new File(filePath);
    final long[] offsets = new long[size];
    IDescriptor directory = directoryCache.get(filePath);
    try {/* w  w w.ja  va  2 s. c  o m*/
        if (directory == null) {
            directory = VarSegments.initDescriptor(dataFile);
            directoryCache.put(filePath, directory);
        }
        for (int i = 0; i < size; i++) {
            offsets[i] = directory.getRecordAddr(idxs[i]);
        }
    } catch (IOException e) {
        LOG.error(e);
        throw e;
    }

    FileChannel fileChannel = fdCacheMap.get(filePath);
    if (fileChannel == null) {
        if (!dataFile.exists()) {
            throw new IllegalStateException("file not exists: " + filePath);
        }
        final RandomAccessFile raf;
        try {
            raf = new RandomAccessFile(dataFile, "r");
        } catch (FileNotFoundException e) {
            throw new IllegalStateException(e);
        }
        fileChannel = raf.getChannel();
        fdCacheMap.put(filePath, fileChannel);
    }

    for (int i = 0; i < size; i++) {
        final long offset = offsets[i];
        // get data length
        final ByteBuffer tmpBuf = ByteBuffer.allocate(4);
        try {
            fileChannel.read(tmpBuf, offset);
        } catch (IOException e) {
            LOG.error(e);
            throw e;
        }
        tmpBuf.flip();
        final int length = tmpBuf.getInt();
        tmpBuf.rewind();
        IoBuffer ioBuf = IoBuffer.wrap(tmpBuf);
        out.write(ioBuf);
        // attempt zero-copy sendfile
        long position = offset + 4;
        long count = length;
        FileRegion fileRegion = new DefaultFileRegion(fileChannel, position, count);
        out.write(fileRegion);
    }
}

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From source file:org.apache.hadoop.hbase.master.replication.ReplicationPeerManager.java

public static ReplicationPeerManager create(ZKWatcher zk, Configuration conf) throws ReplicationException {
    ReplicationPeerStorage peerStorage = ReplicationStorageFactory.getReplicationPeerStorage(zk, conf);
    ConcurrentMap<String, ReplicationPeerDescription> peers = new ConcurrentHashMap<>();
    for (String peerId : peerStorage.listPeerIds()) {
        ReplicationPeerConfig peerConfig = peerStorage.getPeerConfig(peerId);
        boolean enabled = peerStorage.isPeerEnabled(peerId);
        SyncReplicationState state = peerStorage.getPeerSyncReplicationState(peerId);
        peers.put(peerId, new ReplicationPeerDescription(peerId, enabled, peerConfig, state));
    }//  w w  w.ja v  a 2  s .  c o  m
    return new ReplicationPeerManager(peerStorage,
            ReplicationStorageFactory.getReplicationQueueStorage(zk, conf), peers);
}

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From source file:com.tamnd.core.util.ZConfig.java

private static void ConfigToMap(ConcurrentMap<String, String> map, Configuration config, boolean overwrDup) {
    if (config == null) {
        return;/*www .j a va 2 s  .c om*/
    }
    Iterator<String> keyIt = config.getKeys();
    while (keyIt.hasNext()) {
        String key = keyIt.next();
        if (key == null || key.isEmpty()) {
            continue;
        }
        try {
            String value = config.getString(key);
            if (value == null) {
                continue;
            }
            if (overwrDup) {
                String oldVal = map.put(key, value);
                if (oldVal != null) {
                    System.out.println("Configuration key \"" + key + "\" has old value \"" + oldVal
                            + "\" has been overwritten by new value \"" + value + "\"");
                }
            } else {
                String oldVal = map.putIfAbsent(key, value);
                if (oldVal != null) {
                    System.out.println("Configuration key \"" + key + "\" has value \"" + oldVal
                            + "\" NOT be overwrited by new value \"" + value + "\"");
                }
            }
        } catch (Exception ex) {
            System.err.println(ex);
        }
    }
}

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