Example usage for java.nio.channels FileChannel close

Introduction

In this page you can find the example usage for java.nio.channels FileChannel close.

Prototype

public final void close() throws IOException 

Source Link

Document

Closes this channel.

Usage

From source file:org.geowebcache.storage.blobstore.file.FileBlobStore.java

private void writeFile(File target, TileObject stObj, boolean existed) throws StorageException {
    // first write to temp file
    tmp.mkdirs();// ww w. j a  va2 s  . c o  m
    File temp = new File(tmp, UUID.randomUUID().toString());

    try {
        // Open the output stream and read the blob into the tile
        FileOutputStream fos = null;
        FileChannel channel = null;
        try {
            fos = new FileOutputStream(temp);

            channel = fos.getChannel();
            try {
                stObj.getBlob().transferTo(channel);
            } catch (IOException ioe) {
                throw new StorageException(ioe.getMessage() + " for " + target.getAbsolutePath());
            } finally {
                try {
                    if (channel != null) {
                        channel.close();
                    }
                } catch (IOException ioe) {
                    throw new StorageException(ioe.getMessage() + " for " + target.getAbsolutePath());
                }
            }
        } catch (FileNotFoundException ioe) {
            throw new StorageException(ioe.getMessage() + " for " + target.getAbsolutePath());
        } finally {
            IOUtils.closeQuietly(fos);
        }

        // rename to final position. This will fail if another GWC also wrote this
        // file, in such case we'll just eliminate this one
        if (FileUtils.renameFile(temp, target)) {
            temp = null;
        } else if (existed) {
            // if we are trying to overwrite and old tile, on windows that might fail... delete
            // and rename instead
            if (target.delete() && FileUtils.renameFile(temp, target)) {
                temp = null;
            }
        }
    } finally {

        if (temp != null) {
            log.warn("Tile " + target.getPath() + " was already written by another thread/process");
            temp.delete();
        }
    }

}

---

From source file:com.aipo.social.opensocial.spi.AipoStorageService.java

@Override
public boolean copyFile(String srcRootPath, String srcDir, String srcFileName, String destRootPath,
        String destDir, String destFileName, SecurityToken paramSecurityToken) throws ProtocolException {

    File srcPath = new File(
            getAbsolutePath(srcRootPath) + separator() + Database.getDomainName() + separator() + srcDir);

    if (!srcPath.exists()) {
        try {//w  w  w .  ja  v a2 s  . c  o  m
            srcPath.mkdirs();
        } catch (Exception e) {
            return false;
        }
    }

    File destPath = new File(
            getAbsolutePath(destRootPath) + separator() + Database.getDomainName() + separator() + destDir);

    if (!destPath.exists()) {
        try {
            destPath.mkdirs();
        } catch (Exception e) {
            return false;
        }
    }

    File from = new File(srcPath + separator() + srcFileName);
    File to = new File(destPath + separator() + destFileName);

    boolean res = true;
    FileChannel srcChannel = null;
    FileChannel destChannel = null;

    try {
        srcChannel = new FileInputStream(from).getChannel();
        destChannel = new FileOutputStream(to).getChannel();
        destChannel.transferFrom(srcChannel, 0, srcChannel.size());
    } catch (Exception ex) {
        res = false;
    } finally {
        if (destChannel != null) {
            try {
                destChannel.close();
            } catch (IOException ex) {
                res = false;
            }
        }
        if (srcChannel != null) {
            try {
                srcChannel.close();
            } catch (IOException ex) {
                res = false;
            }
        }
    }

    return res;
}

---

From source file:com.yobidrive.diskmap.buckets.BucketTableManager.java

private void initializeBucketTableFromLastCommittedBucketFile() throws BucketTableManagerException {
    FileInputStream tableStream = null;
    FileChannel fileChannel = null;
    try {/*from w w  w  .  j a  v a 2 s.com*/
        File latestCommittedFile = getLatestCommitedFile();
        if (latestCommittedFile != null) {
            tableStream = new FileInputStream(latestCommittedFile);
            fileChannel = tableStream.getChannel();
            ByteBuffer buffer = ByteBuffer.allocate(HEADERSIZE);
            fileChannel.position(0L);
            int read = fileChannel.read(buffer);
            if (read < HEADERSIZE) {
                fileChannel.close();
                throw new BucketTableManagerException(
                        "Wrong bucket table header size: " + read + "/" + HEADERSIZE);
            }
            // Check content of header. Start with Big Endian (default for Java)
            buffer.rewind();
            byteOrder = ByteOrder.BIG_ENDIAN;
            buffer.order(byteOrder);
            int magic = buffer.getInt();
            if (magic == MAGICSTART_BADENDIAN) {
                byteOrder = ByteOrder.LITTLE_ENDIAN;
                buffer.order(byteOrder);
            } else if (magic != MAGICSTART) {
                fileChannel.close();
                throw new BucketTableManagerException("Bad header in bucket table file");
            }
            // Read number of buckets
            long headerMapSize = buffer.getLong();
            // Read checkPoint
            NeedlePointer includedCheckpoint = new NeedlePointer();
            includedCheckpoint.getNeedlePointerFromBuffer(buffer);
            // Read second magic number
            magic = buffer.getInt();
            if (magic != MAGICEND) {
                fileChannel.close();
                throw new BucketTableManagerException("Bad header in bucket table file");
            }
            // Check number of buckets against requested map size
            if (headerMapSize != mapSize) {
                // Map size does not match
                fileChannel.close();
                throw new BucketTableManagerException(
                        "Requested map size " + mapSize + " does not match header map size " + headerMapSize);
            }
            // Sets initial checkpoint
            bucketTable.setInitialCheckPoint(includedCheckpoint);
            // Now reads all entries
            logger.info("Hot start: loading buckets...");
            for (int i = 0; i < nbBuffers; i++) {
                bucketTable.prepareBufferForReading(i);
                read = fileChannel.read(bucketTable.getBuffer(i));
                if (read < bucketTable.getBuffer(i).limit())
                    throw new BucketTableManagerException("Incomplete bucket table file "
                            + latestCommittedFile.getName() + ", expected " + mapSize + HEADERSIZE);
                //else
                //   logger.info("Hot start: loaded "+(i+1)*entriesPerBuffer+" buckets"+((i<(nbBuffers-1))?"...":"")) ;
            }
            // Checks second magic marker
            buffer = ByteBuffer.allocate(NeedleLogInfo.INFOSIZE);
            buffer.rewind();
            buffer.limit(INTSIZE);
            if (fileChannel.read(buffer) < INTSIZE)
                throw new BucketTableManagerException(
                        "Incomplete bucket table file, missing secong magic number "
                                + latestCommittedFile.getName());
            buffer.rewind();
            magic = buffer.getInt();
            if (magic != MAGICSTART) {
                fileChannel.close();
                throw new BucketTableManagerException("Bad header in bucket table file");
            }
            // Now reads clean counters
            while (true) {
                buffer.rewind();
                buffer.limit(NeedleLogInfo.INFOSIZE);
                read = fileChannel.read(buffer);
                if (read > 0 && read < NeedleLogInfo.INFOSIZE)
                    throw new BucketTableManagerException("Incomplete bucket table file, log info too short "
                            + latestCommittedFile.getName() + ", expected " + mapSize + HEADERSIZE);
                if (read <= 0)
                    break;
                else {
                    NeedleLogInfo nli = new NeedleLogInfo(useAverage);
                    buffer.rewind();
                    nli.getNeedleLogInfo(buffer);
                    logInfoPerLogNumber.put(new Integer(nli.getNeedleFileNumber()), nli);
                }
            }
            logger.info("Hot start: loaded " + (nbBuffers * entriesPerBuffer) + " buckets");

        } else {
            // Empty file
            bucketTable.setInitialCheckPoint(new NeedlePointer());
            bucketTable.format();
        }
    } catch (IOException ie) {
        throw new BucketTableManagerException("Failed initializing bucket table", ie);
    } catch (BufferUnderflowException bue) {
        throw new BucketTableManagerException("Bucket table too short", bue);
    } finally {
        if (fileChannel != null) {
            try {
                fileChannel.close();
            } catch (IOException ex) {
                throw new BucketTableManagerException("Error while closing file channel", ex);
            }
        }
    }
}

---

From source file:eu.stratosphere.nephele.services.iomanager.IOManagerPerformanceBenchmark.java

@SuppressWarnings("resource")
private final void speedTestNIO(int bufferSize, boolean direct) throws IOException {
    final Channel.ID tmpChannel = ioManager.createChannel();

    File tempFile = null;/*from w  w  w .j  av a 2s. co  m*/
    FileChannel fs = null;

    try {
        tempFile = new File(tmpChannel.getPath());

        RandomAccessFile raf = new RandomAccessFile(tempFile, "rw");
        fs = raf.getChannel();

        ByteBuffer buf = direct ? ByteBuffer.allocateDirect(bufferSize) : ByteBuffer.allocate(bufferSize);

        long writeStart = System.currentTimeMillis();

        int valsLeft = NUM_INTS_WRITTEN;
        while (valsLeft-- > 0) {
            if (buf.remaining() < 4) {
                buf.flip();
                fs.write(buf);
                buf.clear();
            }
            buf.putInt(valsLeft);
        }

        if (buf.position() > 0) {
            buf.flip();
            fs.write(buf);
        }

        fs.close();
        raf.close();
        fs = null;

        long writeElapsed = System.currentTimeMillis() - writeStart;

        // ----------------------------------------------------------------

        raf = new RandomAccessFile(tempFile, "r");
        fs = raf.getChannel();
        buf.clear();

        long readStart = System.currentTimeMillis();

        fs.read(buf);
        buf.flip();

        valsLeft = NUM_INTS_WRITTEN;
        while (valsLeft-- > 0) {
            if (buf.remaining() < 4) {
                buf.compact();
                fs.read(buf);
                buf.flip();
            }
            if (buf.getInt() != valsLeft) {
                throw new IOException();
            }
        }

        fs.close();
        raf.close();

        long readElapsed = System.currentTimeMillis() - readStart;

        LOG.info("NIO Channel with buffer " + bufferSize + ": write " + writeElapsed + " msecs, read "
                + readElapsed + " msecs.");
    } finally {
        // close if possible
        if (fs != null) {
            fs.close();
            fs = null;
        }
        // try to delete the file
        if (tempFile != null) {
            tempFile.delete();
        }
    }
}

---

From source file:eu.stratosphere.nephele.taskmanager.runtime.EnvelopeConsumptionLog.java

private void writeAnnouncedEnvelopesBufferToDisk() {

    FileChannel fc = null;

    try {/*from   www  .  j  a v  a 2  s  . c o m*/

        this.announcedEnvelopesAsIntBuffer.flip();
        this.announcedEnvelopesAsByteBuffer
                .position(this.announcedEnvelopesAsIntBuffer.position() * SIZE_OF_INTEGER);
        this.announcedEnvelopesAsByteBuffer.limit(this.announcedEnvelopesAsIntBuffer.limit() * SIZE_OF_INTEGER);

        fc = new FileOutputStream(this.logFile, true).getChannel();

        while (this.announcedEnvelopesAsByteBuffer.hasRemaining()) {
            fc.write(this.announcedEnvelopesAsByteBuffer);
        }

    } catch (IOException ioe) {
        LOG.error(StringUtils.stringifyException(ioe));
    } finally {

        if (fc != null) {
            try {
                fc.close();
            } catch (IOException ioe) {
            }
        }

        this.announcedEnvelopesAsIntBuffer.clear();
        this.announcedEnvelopesAsByteBuffer.clear();
    }

}

---

From source file:edu.cmu.graphchi.shards.QueryShard.java

private void loadInEdgeStartBuffer() throws IOException {
    File inEdgeStartBufferFile = new File(
            ChiFilenames.getFilenameShardsAdjStartIndices(adjFile.getAbsolutePath()));
    FileChannel inEdgeStartChannel = new java.io.RandomAccessFile(inEdgeStartBufferFile, "r").getChannel();
    inEdgeStartBuffer = inEdgeStartChannel.map(FileChannel.MapMode.READ_ONLY, 0, inEdgeStartBufferFile.length())
            .asIntBuffer();/* w  w  w .j  a v  a  2 s .c om*/
    inEdgeStartChannel.close();
}

---

From source file:dk.statsbiblioteket.util.LineReaderTest.java

public void testNIO() throws Exception {
    byte[] INITIAL = new byte[] { 1, 2, 3, 4 };
    byte[] EXTRA = new byte[] { 5, 6, 7, 8 };
    byte[] FULL = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
    byte[] FIFTH = new byte[] { 87 };
    byte[] FULL_WITH_FIFTH = new byte[] { 1, 2, 3, 4, 87, 6, 7, 8 };

    // Create temp-file with content
    File temp = createTempFile();
    FileOutputStream fileOut = new FileOutputStream(temp, true);
    fileOut.write(INITIAL);//from   w  ww . j  a v  a  2 s. c om
    fileOut.close();

    checkContent("The plain test-file should be correct", temp, INITIAL);
    {
        // Read the 4 bytes
        RandomAccessFile input = new RandomAccessFile(temp, "r");
        FileChannel channelIn = input.getChannel();
        ByteBuffer buffer = ByteBuffer.allocate(4096);
        channelIn.position(0);
        assertEquals("Buffer read should read full length", INITIAL.length, channelIn.read(buffer));
        buffer.position(0);

        checkContent("Using buffer should produce the right bytes", INITIAL, buffer);
        channelIn.close();
        input.close();
    }
    {
        // Fill new buffer
        ByteBuffer outBuffer = ByteBuffer.allocate(4096);
        outBuffer.put(EXTRA);
        outBuffer.flip();
        assertEquals("The limit of the outBuffer should be correct", EXTRA.length, outBuffer.limit());

        // Append new buffer to end
        RandomAccessFile output = new RandomAccessFile(temp, "rw");
        FileChannel channelOut = output.getChannel();
        channelOut.position(INITIAL.length);
        assertEquals("All bytes should be written", EXTRA.length, channelOut.write(outBuffer));
        channelOut.close();
        output.close();
        checkContent("The resulting file should have the full output", temp, FULL);
    }

    {
        // Fill single byte buffer
        ByteBuffer outBuffer2 = ByteBuffer.allocate(4096);
        outBuffer2.put(FIFTH);
        outBuffer2.flip();
        assertEquals("The limit of the second outBuffer should be correct", FIFTH.length, outBuffer2.limit());

        // Insert byte in the middle
        RandomAccessFile output2 = new RandomAccessFile(temp, "rw");
        FileChannel channelOut2 = output2.getChannel();
        channelOut2.position(4);
        assertEquals("The FIFTH should be written", FIFTH.length, channelOut2.write(outBuffer2));
        channelOut2.close();
        output2.close();
        checkContent("The resulting file with fifth should be complete", temp, FULL_WITH_FIFTH);
    }
}

---

From source file:org.apache.cordova.core.FileUtils.java

/**
 * Moved this code into it's own method so moveTo could use it when the move is across file systems
 *///from ww w .  j  ava 2  s  .co m
private void copyAction(File srcFile, File destFile) throws FileNotFoundException, IOException {
    FileInputStream istream = new FileInputStream(srcFile);
    FileOutputStream ostream = new FileOutputStream(destFile);
    FileChannel input = istream.getChannel();
    FileChannel output = ostream.getChannel();

    try {
        input.transferTo(0, input.size(), output);
    } finally {
        istream.close();
        ostream.close();
        input.close();
        output.close();
    }
}

---

From source file:edu.cmu.graphchi.shards.QueryShard.java

void loadPointers() throws IOException {
    File pointerFile = new File(ChiFilenames.getFilenameShardsAdjPointers(adjFile.getAbsolutePath()));
    if (!pinIndexToMemory) {
        FileChannel ptrFileChannel = new java.io.RandomAccessFile(pointerFile, "r").getChannel();
        pointerIdxBuffer = ptrFileChannel.map(FileChannel.MapMode.READ_ONLY, 0, pointerFile.length())
                .asLongBuffer();/*w ww  . j a  v a2s  .c o  m*/
        ptrFileChannel.close();
    } else {
        byte[] data = new byte[(int) pointerFile.length()];

        if (data.length == 0)
            return;
        totalOrigSize += data.length;

        FileInputStream fis = new FileInputStream(pointerFile);
        int i = 0;
        while (i < data.length) {
            i += fis.read(data, i, data.length - i);
        }
        fis.close();

        pointerIdxBuffer = ByteBuffer.wrap(data).asLongBuffer();

        long[] vertices = new long[pointerIdxBuffer.capacity() - 1];
        long[] offs = new long[vertices.length];

        for (int j = 0; j < vertices.length; j++) {
            long x = pointerIdxBuffer.get(j);
            vertices[j] = VertexIdTranslate.getVertexId(x);
            offs[j] = VertexIdTranslate.getAux(x);
        }

        boolean extraZero = (offs.length > 1 && offs[1] == offs[0]);
        if (extraZero) {
            vertices = Arrays.copyOfRange(vertices, 1, vertices.length);
            offs = Arrays.copyOfRange(offs, 1, offs.length);
        }

        gammaSeqVertices = new IncreasingEliasGammaSeq(vertices);
        gammaSeqOffs = new IncreasingEliasGammaSeq(offs);

        totalPinnedSize += gammaSeqVertices.sizeInBytes();
        totalPinnedSize += gammaSeqOffs.sizeInBytes();
        pointerIdxBuffer = null;

    }
}

---

From source file:com.yobidrive.diskmap.needles.NeedleManager.java

public void close() {
    Enumeration<FileChannel> channels = channelMap.elements();
    while (channels.hasMoreElements()) {
        FileChannel fc = channels.nextElement();
        try {/*  w w  w  .  j a  v a2 s  .c  o m*/
            fc.force(true);
            fc.close();
        } catch (Throwable th) {
            logger.error("Error closing needle channel", th);
        }
    }
}

---

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