Example usage for java.io ObjectInputStream readLong

Introduction

In this page you can find the example usage for java.io ObjectInputStream readLong.

Prototype

public long readLong() throws IOException 

Source Link

Document

Reads a 64 bit long.

Usage

From source file:it.unimi.di.big.mg4j.document.TRECDocumentCollection.java

private void readObject(final ObjectInputStream s) throws IOException, ClassNotFoundException {
    s.defaultReadObject();/*  w ww .  ja va2 s  . com*/

    final long size = s.readLong();
    final ObjectBigArrayBigList<TRECDocumentDescriptor> descriptors = new ObjectBigArrayBigList<TRECDocumentDescriptor>();
    descriptors.ensureCapacity(size);
    for (int i = 0; i < size; i++)
        descriptors.add(new TRECDocumentDescriptor(s.readInt(), s.readLong(), s.readInt(), s.readInt()));
    this.descriptors = descriptors;
}

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From source file:com.ecyrd.jspwiki.ReferenceManager.java

/**
 *  Reads the serialized data from the disk back to memory.
 *  Returns the date when the data was last written on disk
 */// w  w  w  . jav a2  s.c  o  m
@SuppressWarnings("unchecked")
private synchronized long unserializeFromDisk() throws IOException, ClassNotFoundException {
    ObjectInputStream in = null;
    long saved = 0L;

    try {
        StopWatch sw = new StopWatch();
        sw.start();

        File f = new File(m_engine.getWorkDir(), SERIALIZATION_FILE);

        in = new ObjectInputStream(new BufferedInputStream(new FileInputStream(f)));

        long ver = in.readLong();

        if (ver != serialVersionUID) {
            throw new IOException("File format has changed; I need to recalculate references.");
        }

        saved = in.readLong();
        m_refersTo = (Map) in.readObject();
        m_referredBy = (Map) in.readObject();

        in.close();

        m_unmutableReferredBy = Collections.unmodifiableMap(m_referredBy);
        m_unmutableRefersTo = Collections.unmodifiableMap(m_refersTo);

        sw.stop();
        log.debug("Read serialized data successfully in " + sw);
    } finally {
        if (in != null)
            in.close();
    }

    return saved;
}

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From source file:com.ecyrd.jspwiki.ReferenceManager.java

/**
 *  Reads the serialized data from the disk back to memory.
 *  Returns the date when the data was last written on disk
 *//*from   w  ww.j a v  a2 s.com*/
private synchronized long unserializeAttrsFromDisk(WikiPage p) throws IOException, ClassNotFoundException {
    ObjectInputStream in = null;
    long saved = 0L;

    try {
        StopWatch sw = new StopWatch();
        sw.start();

        //
        //  Find attribute cache, and check if it exists
        //
        File f = new File(m_engine.getWorkDir(), SERIALIZATION_DIR);

        f = new File(f, getHashFileName(p.getName()));

        if (!f.exists()) {
            return 0L;
        }

        log.debug("Deserializing attributes for " + p.getName());

        in = new ObjectInputStream(new BufferedInputStream(new FileInputStream(f)));

        long ver = in.readLong();

        if (ver != serialVersionUID) {
            log.debug("File format has changed; cannot deserialize.");
            return 0L;
        }

        saved = in.readLong();

        String name = in.readUTF();

        if (!name.equals(p.getName())) {
            log.debug("File name does not match (" + name + "), skipping...");
            return 0L; // Not here
        }

        long entries = in.readLong();

        for (int i = 0; i < entries; i++) {
            String key = in.readUTF();
            Object value = in.readObject();

            p.setAttribute(key, value);

            log.debug("   attr: " + key + "=" + value);
        }

        in.close();

        sw.stop();
        log.debug("Read serialized data for " + name + " successfully in " + sw);
        p.setHasMetadata();
    } catch (NoSuchAlgorithmException e) {
        log.fatal("No MD5!?!");
    } finally {
        if (in != null)
            in.close();
    }

    return saved;
}

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From source file:org.aksw.dice.eaglet.uri.impl.FileBasedCachingUriCheckerManager.java

public static ObjectLongOpenHashMap<String> readCacheFile(File cacheFile) {
    if (!cacheFile.exists() || cacheFile.isDirectory()) {
        return null;
    }/*  w  ww .j  a  v a  2 s  .co  m*/
    FileInputStream fin = null;
    ObjectInputStream oin = null;
    try {
        fin = new FileInputStream(cacheFile);
        oin = new ObjectInputStream(fin);
        // first, read the number of URIs
        int count = oin.readInt();
        String uri;
        ObjectLongOpenHashMap<String> cache = new ObjectLongOpenHashMap<String>(2 * count);
        for (int i = 0; i < count; ++i) {
            uri = (String) oin.readObject();
            cache.put(uri, oin.readLong());
        }
        return cache;
    } catch (Exception e) {
        LOGGER.error("Exception while reading cache file.", e);
    } finally {
        IOUtils.closeQuietly(oin);
        IOUtils.closeQuietly(fin);
    }
    return null;
}

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From source file:org.apache.flink.cep.nfa.SharedBuffer.java

private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
    DataInputViewStreamWrapper source = new DataInputViewStreamWrapper(ois);
    ArrayList<SharedBufferEntry<K, V>> entryList = new ArrayList<>();
    ois.defaultReadObject();//from w w w . ja  va  2s.  c  om

    this.pages = new HashMap<>();

    int numberPages = ois.readInt();

    for (int i = 0; i < numberPages; i++) {
        // key of the page
        @SuppressWarnings("unchecked")
        K key = (K) ois.readObject();

        SharedBufferPage<K, V> page = new SharedBufferPage<>(key);

        pages.put(key, page);

        int numberEntries = ois.readInt();

        for (int j = 0; j < numberEntries; j++) {
            // restore the SharedBufferEntries for the given page
            V value = valueSerializer.deserialize(source);
            long timestamp = ois.readLong();

            ValueTimeWrapper<V> valueTimeWrapper = new ValueTimeWrapper<>(value, timestamp);
            SharedBufferEntry<K, V> sharedBufferEntry = new SharedBufferEntry<K, V>(valueTimeWrapper, page);

            sharedBufferEntry.referenceCounter = ois.readInt();

            page.entries.put(valueTimeWrapper, sharedBufferEntry);

            entryList.add(sharedBufferEntry);
        }
    }

    // read the edges of the shared buffer entries
    int numberEdges = ois.readInt();

    for (int j = 0; j < numberEdges; j++) {
        int sourceIndex = ois.readInt();
        int targetIndex = ois.readInt();

        if (sourceIndex >= entryList.size() || sourceIndex < 0) {
            throw new RuntimeException("Could not find source entry with index " + sourceIndex
                    + ". This indicates a corrupted state.");
        } else {
            // We've already deserialized the shared buffer entry. Simply read its ID and
            // retrieve the buffer entry from the list of entries
            SharedBufferEntry<K, V> sourceEntry = entryList.get(sourceIndex);

            final DeweyNumber version = (DeweyNumber) ois.readObject();
            final SharedBufferEntry<K, V> target;

            if (targetIndex >= 0) {
                if (targetIndex >= entryList.size()) {
                    throw new RuntimeException("Could not find target entry with index " + targetIndex
                            + ". This indicates a corrupted state.");
                } else {
                    target = entryList.get(targetIndex);
                }
            } else {
                target = null;
            }

            sourceEntry.edges.add(new SharedBufferEdge<K, V>(target, version));
        }
    }
}

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From source file:org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.java

@SuppressWarnings("unchecked")
private void retrieveFromFile() throws IOException, BucketAllocatorException, ClassNotFoundException {
    File persistenceFile = new File(persistencePath);
    if (!persistenceFile.exists()) {
        return;/*from w  w  w. j a va2  s . co m*/
    }
    assert !cacheEnabled;
    FileInputStream fis = null;
    ObjectInputStream ois = null;
    try {
        if (!ioEngine.isPersistent())
            throw new IOException("Attempt to restore non-persistent cache mappings!");
        fis = new FileInputStream(persistencePath);
        ois = new ObjectInputStream(fis);
        long capacitySize = ois.readLong();
        if (capacitySize != cacheCapacity)
            throw new IOException("Mismatched cache capacity:" + StringUtils.byteDesc(capacitySize)
                    + ", expected: " + StringUtils.byteDesc(cacheCapacity));
        String ioclass = ois.readUTF();
        String mapclass = ois.readUTF();
        if (!ioEngine.getClass().getName().equals(ioclass))
            throw new IOException("Class name for IO engine mismatch: " + ioclass + ", expected:"
                    + ioEngine.getClass().getName());
        if (!backingMap.getClass().getName().equals(mapclass))
            throw new IOException("Class name for cache map mismatch: " + mapclass + ", expected:"
                    + backingMap.getClass().getName());
        UniqueIndexMap<Integer> deserMap = (UniqueIndexMap<Integer>) ois.readObject();
        BucketAllocator allocator = new BucketAllocator(cacheCapacity, backingMap, this.realCacheSize);
        backingMap = (ConcurrentHashMap<BlockCacheKey, BucketEntry>) ois.readObject();
        bucketAllocator = allocator;
        deserialiserMap = deserMap;
    } finally {
        if (ois != null)
            ois.close();
        if (fis != null)
            fis.close();
        if (!persistenceFile.delete()) {
            throw new IOException("Failed deleting persistence file " + persistenceFile.getAbsolutePath());
        }
    }
}

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From source file:org.apache.hawq.pxf.plugins.hdfs.utilities.HdfsUtilities.java

/**
 * Parses fragment metadata and return matching {@link FileSplit}.
 *
 * @param inputData request input data//from   w  w w . jav  a2  s.  c  o m
 * @return FileSplit with fragment metadata
 */
public static FileSplit parseFragmentMetadata(InputData inputData) {
    try {
        byte[] serializedLocation = inputData.getFragmentMetadata();
        if (serializedLocation == null) {
            throw new IllegalArgumentException("Missing fragment location information");
        }

        ByteArrayInputStream bytesStream = new ByteArrayInputStream(serializedLocation);
        ObjectInputStream objectStream = new ObjectInputStream(bytesStream);

        long start = objectStream.readLong();
        long end = objectStream.readLong();

        String[] hosts = (String[]) objectStream.readObject();

        FileSplit fileSplit = new FileSplit(new Path(inputData.getDataSource()), start, end, hosts);

        LOG.debug("parsed file split: path " + inputData.getDataSource() + ", start " + start + ", end " + end
                + ", hosts " + ArrayUtils.toString(hosts));

        return fileSplit;

    } catch (Exception e) {
        throw new RuntimeException("Exception while reading expected fragment metadata", e);
    }
}

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From source file:org.codehaus.wadi.core.store.DiscStore.java

public void load(Putter putter) {
    long time = System.currentTimeMillis();
    String[] list = sessionStoreDir.list();
    int suffixLength = ".".length() + streamer.getSuffix().length();
    for (int i = 0; i < list.length; i++) {
        String name = list[i];//from w ww . j a v  a 2 s. com
        String id = name.substring(0, name.length() - suffixLength);

        Motable motable = new BasicStoreMotable(this);
        File file = new File(sessionStoreDir, id + streamer.getSuffixWithDot());
        FileInputStream fis = null;
        ObjectInputStream ois = null;
        try {
            fis = new FileInputStream(file);
            ois = new ObjectInputStream(fis);
            long creationTime = ois.readLong();
            long lastAccessedTime = ois.readLong();
            int maxInactiveInterval = ois.readInt();
            name = (String) ois.readObject();
            motable.init(creationTime, lastAccessedTime, maxInactiveInterval, name);
            if (accessOnLoad) {
                motable.setLastAccessedTime(time);
            }
            if (!motable.getTimedOut(time)) {
                putter.put(id, motable);
            }
        } catch (Exception e) {
            log.warn("load (exclusive disc) failed [" + file + "]", e);
        } finally {
            try {
                if (null != ois) {
                    ois.close();
                }
            } catch (IOException e) {
                log.warn("load (exclusive disc) problem [" + file + "]", e);
            }
        }
    }
    log.info("loaded (exclusive disc): " + list.length);
}

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From source file:org.codehaus.wadi.core.store.DiscStore.java

public byte[] loadBody(Motable motable) throws Exception {
    File file = new File(sessionStoreDir, motable.getId() + streamer.getSuffixWithDot());

    FileInputStream fis = null;/*from w  ww  .ja v a 2 s .  com*/
    try {
        fis = new FileInputStream(file);
        ObjectInputStream ois = new ObjectInputStream(fis);
        ois.readLong();
        ois.readLong();
        ois.readInt();
        ois.readObject();
        int bodyLength = ois.readInt();
        byte[] body = new byte[bodyLength];
        fis.read(body);
        if (log.isTraceEnabled()) {
            log.trace("loaded exclusive disc: " + file + ": " + bodyLength + " bytes");
        }
        return body;
    } catch (Exception e) {
        log.error("load exclusive disc failed: " + file, e);
        throw e;
    } finally {
        try {
            if (null != fis) {
                fis.close();
            }
        } catch (IOException e) {
            log.warn("load exclusive disc problem: " + file, e);
        }
    }
}

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From source file:org.datanucleus.store.hbase.fieldmanager.FetchFieldManager.java

private long fetchLongInternal(AbstractMemberMetaData mmd, byte[] bytes) {
    long value;/*from   www. ja  v  a2s  .  co  m*/
    if (bytes == null) {
        // Handle missing field
        String dflt = HBaseUtils.getDefaultValueForMember(mmd);
        if (dflt != null) {
            return Long.valueOf(dflt).longValue();
        }
        return 0;
    }

    if (mmd.isSerialized()) {
        try {
            ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
            ObjectInputStream ois = new ObjectInputStream(bis);
            value = ois.readLong();
            ois.close();
            bis.close();
        } catch (IOException e) {
            throw new NucleusException(e.getMessage(), e);
        }
    } else {
        value = Bytes.toLong(bytes);
    }
    return value;
}

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