Example usage for java.util.concurrent ConcurrentSkipListMap ConcurrentSkipListMap

Introduction

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

Prototype

public ConcurrentSkipListMap(SortedMap<K, ? extends V> m) 

Source Link

Document

Constructs a new map containing the same mappings and using the same ordering as the specified sorted map.

Usage

From source file:org.apache.blur.kvs.HdfsKeyValueStore.java

private NavigableMap<BytesRef, Value> createSnapshot() {
    _writeLock.lock();/*www.  jav a2s. c o m*/
    try {
        return new ConcurrentSkipListMap<BytesRef, Value>(_pointers);
    } finally {
        _writeLock.unlock();
    }
}

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From source file:org.apache.cassandra.db.ColumnFamilyStore.java

private ColumnFamilyStore(Table table, String columnFamilyName, IPartitioner partitioner, int generation,
        CFMetaData metadata) {//from w  w  w.ja va  2  s.co  m
    assert metadata != null : "null metadata for " + table + ":" + columnFamilyName;
    this.table = table;
    columnFamily = columnFamilyName;
    this.metadata = metadata;
    this.minCompactionThreshold = new DefaultInteger(metadata.getMinCompactionThreshold());
    this.maxCompactionThreshold = new DefaultInteger(metadata.getMaxCompactionThreshold());
    this.memtime = new DefaultInteger(metadata.getMemtableFlushAfterMins());
    this.memsize = new DefaultInteger(metadata.getMemtableThroughputInMb());
    this.memops = new DefaultDouble(metadata.getMemtableOperationsInMillions());
    this.rowCacheSaveInSeconds = new DefaultInteger(metadata.getRowCacheSavePeriodInSeconds());
    this.keyCacheSaveInSeconds = new DefaultInteger(metadata.getKeyCacheSavePeriodInSeconds());
    this.partitioner = partitioner;
    fileIndexGenerator.set(generation);
    binaryMemtable = new AtomicReference<BinaryMemtable>(new BinaryMemtable(this));

    if (logger.isDebugEnabled())
        logger.debug("Starting CFS {}", columnFamily);

    ICache<Pair<Descriptor, DecoratedKey>, Long> kc = ConcurrentLinkedHashCache.create(0);
    keyCache = new AutoSavingKeyCache<Pair<Descriptor, DecoratedKey>, Long>(kc, table.name, columnFamilyName);
    ICache<DecoratedKey, ColumnFamily> rc = metadata.getRowCacheProvider().create(0);
    rowCache = new AutoSavingRowCache<DecoratedKey, ColumnFamily>(rc, table.name, columnFamilyName);

    // scan for sstables corresponding to this cf and load them
    data = new DataTracker(this);
    Set<DecoratedKey> savedKeys = keyCache.readSaved();
    List<SSTableReader> sstables = new ArrayList<SSTableReader>();
    for (Map.Entry<Descriptor, Set<Component>> sstableFiles : files(table.name, columnFamilyName, false)
            .entrySet()) {
        SSTableReader sstable;
        try {
            sstable = SSTableReader.open(sstableFiles.getKey(), sstableFiles.getValue(), savedKeys, data,
                    metadata, this.partitioner);
        } catch (FileNotFoundException ex) {
            logger.error(
                    "Missing sstable component in " + sstableFiles + "; skipped because of " + ex.getMessage());
            continue;
        } catch (IOException ex) {
            logger.error("Corrupt sstable " + sstableFiles + "; skipped", ex);
            continue;
        }
        sstables.add(sstable);
    }
    data.addSSTables(sstables);

    // create the private ColumnFamilyStores for the secondary column indexes
    indexedColumns = new ConcurrentSkipListMap<ByteBuffer, ColumnFamilyStore>(getComparator());
    for (ColumnDefinition info : metadata.getColumn_metadata().values()) {
        if (info.getIndexType() != null)
            addIndex(info);
    }

    // register the mbean
    String type = this.partitioner instanceof LocalPartitioner ? "IndexColumnFamilies" : "ColumnFamilies";
    mbeanName = "org.apache.cassandra.db:type=" + type + ",keyspace=" + this.table.name + ",columnfamily="
            + columnFamily;
    try {
        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
        ObjectName nameObj = new ObjectName(mbeanName);
        mbs.registerMBean(this, nameObj);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:org.apache.hadoop.hbase.client.TestClientNoCluster.java

/**
 * Create up a map that is keyed by meta row name and whose value is the HRegionInfo and
 * ServerName to return for this row.//from  w  w w.  ja  va 2s  . co m
 * @return Map with faked hbase:meta content in it.
 */
static SortedMap<byte[], Pair<HRegionInfo, ServerName>> makeMeta(final byte[] tableName, final int regionCount,
        final long namespaceSpan, final int serverCount) {
    // I need a comparator for meta rows so we sort properly.
    SortedMap<byte[], Pair<HRegionInfo, ServerName>> meta = new ConcurrentSkipListMap<byte[], Pair<HRegionInfo, ServerName>>(
            new MetaRowsComparator());
    HRegionInfo[] hris = makeHRegionInfos(tableName, regionCount, namespaceSpan);
    ServerName[] serverNames = makeServerNames(serverCount);
    int per = regionCount / serverCount;
    int count = 0;
    for (HRegionInfo hri : hris) {
        Pair<HRegionInfo, ServerName> p = new Pair<HRegionInfo, ServerName>(hri, serverNames[count++ / per]);
        meta.put(hri.getRegionName(), p);
    }
    return meta;
}

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