Example usage for java.nio.channels ReadableByteChannel read

List of usage examples for java.nio.channels ReadableByteChannel read

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Introduction

In this page you can find the example usage for java.nio.channels ReadableByteChannel read.

Prototype

public int read(ByteBuffer dst) throws IOException;

Source Link

Document

Reads a sequence of bytes from this channel into the given buffer.

Usage

From source file:org.alfresco.contentstore.patch.PatchServiceImpl.java

@Override
public void getPatch(PatchDocument patchDocument, NodeChecksums nodeChecksums, ReadableByteChannel inChannel)
        throws IOException {
    ByteBuffer buffer = ByteBuffer.allocate(1024 * 100);
    inChannel.read(buffer);
    buffer.flip();//from   w  ww.  j a  v  a2  s  .c  om

    updatePatchDocument(patchDocument, nodeChecksums, buffer);
}

From source file:com.bennavetta.appsite.file.ResourceService.java

public Resource create(String path, MediaType mime, ReadableByteChannel src) throws IOException {
    String normalized = PathUtils.normalize(path);
    log.debug("Creating resource {}", normalized);

    AppEngineFile file = fs.createNewBlobFile(mime.toString(), normalized);
    FileWriteChannel channel = fs.openWriteChannel(file, true);

    MessageDigest digest = null;/*w  w w.  jav  a2s  .c  o m*/
    try {
        digest = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("MD5 not available", e);
    }
    ByteBuffer buf = ByteBuffer.allocateDirect(bufferSize.get());
    while (src.read(buf) != -1 || buf.position() != 0) {
        buf.flip();
        int read = channel.write(buf);
        if (read != 0) {
            int origPos = buf.position();
            int origLimit = buf.limit();
            buf.position(origPos - read);
            buf.limit(origPos);
            digest.update(buf);
            buf.limit(origLimit);
            buf.position(origPos);
        }

        buf.compact();
    }

    channel.closeFinally();
    Resource resource = new Resource(normalized, fs.getBlobKey(file).getKeyString(), digest.digest(), mime);
    resource.save();
    return resource;
}

From source file:com.sastix.cms.server.services.content.impl.HashedDirectoryServiceImpl.java

private void replaceFile(final Path file, final URL url) throws IOException {
    //Create the file
    SeekableByteChannel sbc = null;
    try {/* w  w w  . j  a v a 2  s  .  com*/
        //Creates a new Readable Byte channel from URL
        final ReadableByteChannel rbc = Channels.newChannel(url.openStream());
        //Create the file
        sbc = Files.newByteChannel(file, FILE_REPLACE_OPTIONS);

        //Clears the buffer
        buffer.clear();

        //Read input Channel
        while (rbc.read(buffer) != -1) {
            // prepare the buffer to be drained
            buffer.flip();
            // write to the channel, may block
            sbc.write(buffer);
            // If partial transfer, shift remainder down
            // If buffer is empty, same as doing clear()
            buffer.compact();
        }
        // EOF will leave buffer in fill state
        buffer.flip();
        // make sure the buffer is fully drained.
        while (buffer.hasRemaining()) {
            sbc.write(buffer);
        }
    } finally {
        if (sbc != null) {
            sbc.close();
        }
    }
}

From source file:com.sastix.cms.server.services.content.impl.HashedDirectoryServiceImpl.java

/**
 * Writes file to disk and copy the contents of the input byte array.
 *
 * @param file a Path with file path./*from   w ww.ja v  a2  s.c o  m*/
 * @param url  a remote/local url to be saved as file
 * @throws IOException
 */
private void writeFile(final Path file, final URL url) throws IOException {

    if (url.toString().startsWith("jar:file:///")) {
        try {
            writeZipFile(file, url);
        } catch (Exception e) {
            throw new IOException(e);
        }
    } else {

        //Create the file
        SeekableByteChannel sbc = null;
        try {
            //Creates a new Readable Byte channel from URL
            final ReadableByteChannel rbc = Channels.newChannel(url.openStream());
            //Create the file
            sbc = Files.newByteChannel(file, FILE_OPEN_OPTIONS);

            //Clears the buffer
            buffer.clear();

            //Read input Channel
            while (rbc.read(buffer) != -1) {
                // prepare the buffer to be drained
                buffer.flip();
                // write to the channel, may block
                sbc.write(buffer);
                // If partial transfer, shift remainder down
                // If buffer is empty, same as doing clear()
                buffer.compact();
            }
            // EOF will leave buffer in fill state
            buffer.flip();
            // make sure the buffer is fully drained.
            while (buffer.hasRemaining()) {
                sbc.write(buffer);
            }
        } finally {
            if (sbc != null) {
                sbc.close();
            }
        }
    }
}

From source file:org.alfresco.provision.ActiveMQService.java

private BrokerStats getBrokerStats() throws IOException {
    BrokerStats brokerStats = new BrokerStats();

    StringBuilder sb = new StringBuilder("http://");
    sb.append(activeMQHost);//from   w  w  w .j a va2s.  co m
    sb.append(":");
    sb.append(activeMQPort);
    sb.append("/api/jolokia");
    String url = sb.toString();

    CloseableHttpResponse httpResponse = null;

    HttpPost httpPost = new HttpPost(url);
    Request[] post = new Request[] {
            new Request("read", "org.apache.activemq:type=Broker,brokerName=localhost", "MemoryPercentUsage"),
            new Request("read", "org.apache.activemq:type=Broker,brokerName=localhost", "StorePercentUsage"),
            new Request("read", "org.apache.activemq:type=Broker,brokerName=localhost", "TempPercentUsage") };
    String str = mapper.writeValueAsString(post);
    HttpEntity postEntity = new StringEntity(str);
    httpPost.setEntity(postEntity);
    httpResponse = client.execute(httpPost);

    StatusLine status = httpResponse.getStatusLine();
    // Expecting "OK" status
    if (status.getStatusCode() == HttpStatus.SC_OK) {
        HttpEntity entity = httpResponse.getEntity();
        InputStream in = entity.getContent();
        try {
            ByteBuffer bb = ByteBuffer.allocate(1024 * 10);
            ReadableByteChannel inChannel = Channels.newChannel(in);
            int read = -1;
            do {
                read = inChannel.read(bb);
            } while (read != -1);
            bb.flip();
            Response[] response = mapper.readValue(bb.array(), Response[].class);
            for (Response r : response) {
                if (r.getRequest().getAttribute().equals("MemoryPercentUsage")) {
                    double memoryPercentUsage = r.getValue() != null ? r.getValue() : 0.0;
                    brokerStats.withMemoryPercentUsage(memoryPercentUsage);
                } else if (r.getRequest().getAttribute().equals("StorePercentUsage")) {
                    double storePercentUsage = r.getValue() != null ? r.getValue() : 0.0;
                    brokerStats.withStorePercentUsage(storePercentUsage);
                } else if (r.getRequest().getAttribute().equals("TempPercentUsage")) {
                    double tempPercentUsage = r.getValue() != null ? r.getValue() : 0.0;
                    brokerStats.withTempPercentUsage(tempPercentUsage);
                }
            }
        } finally {
            if (in != null) {
                in.close();
            }
        }
    } else {
        // TODO
    }

    return brokerStats;
}

From source file:org.alfresco.provision.ActiveMQService.java

private DestinationStats getStats(String destinationType, String destinationName) throws IOException {
    StringBuilder sb = new StringBuilder("http://");
    sb.append(activeMQHost);// w  w w  .  ja v  a 2  s. com
    sb.append(":");
    sb.append(activeMQPort);
    sb.append("/api/jolokia");
    String url = sb.toString();

    CloseableHttpResponse httpResponse = null;

    HttpPost httpPost = new HttpPost(url);
    Request[] post = new Request[] {
            new Request("read",
                    "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=" + destinationType
                            + ",destinationName=" + destinationName,
                    "AverageEnqueueTime"),
            new Request("read",
                    "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=" + destinationType
                            + ",destinationName=" + destinationName,
                    "EnqueueCount"),
            new Request("read",
                    "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=" + destinationType
                            + ",destinationName=" + destinationName,
                    "DequeueCount"),
            new Request("read",
                    "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=" + destinationType
                            + ",destinationName=" + destinationName,
                    "DispatchCount"),
            new Request("read",
                    "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=" + destinationType
                            + ",destinationName=" + destinationName,
                    "MemoryPercentUsage"),
            new Request("read",
                    "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=" + destinationType
                            + ",destinationName=" + destinationName,
                    "AverageBlockedTime"),
            new Request("read",
                    "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=" + destinationType
                            + ",destinationName=" + destinationName,
                    "QueueSize"),
            new Request("read",
                    "org.apache.activemq:type=Broker,brokerName=localhost,destinationType=" + destinationType
                            + ",destinationName=" + destinationName,
                    "BlockedSends"),
            new Request("read", "org.apache.activemq:type=Broker,brokerName=localhost,destinationType="
                    + destinationType + ",destinationName=" + destinationName, "MaxEnqueueTime") };
    String str = mapper.writeValueAsString(post);
    HttpEntity postEntity = new StringEntity(str);
    httpPost.setEntity(postEntity);
    httpResponse = client.execute(httpPost);

    DestinationStats stats = new DestinationStats(destinationType, destinationName);

    StatusLine status = httpResponse.getStatusLine();
    // Expecting "OK" status
    if (status.getStatusCode() == HttpStatus.SC_OK) {
        HttpEntity entity = httpResponse.getEntity();
        InputStream in = entity.getContent();
        try {
            ByteBuffer bb = ByteBuffer.allocate(1024 * 10);
            ReadableByteChannel inChannel = Channels.newChannel(in);
            int read = -1;
            do {
                read = inChannel.read(bb);
            } while (read != -1);
            bb.flip();
            Response[] response = mapper.readValue(bb.array(), Response[].class);
            for (Response r : response) {
                if (r.getRequest().getAttribute().equals("AverageEnqueueTime")) {
                    stats.setAverageEnqueueTime(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("EnqueueCount")) {
                    stats.setEnqueueCount(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("DequeueCount")) {
                    stats.setDequeueCount(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("DispatchCount")) {
                    stats.setDispatchCount(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("MemoryPercentUsage")) {
                    stats.setMemoryPercentUsage(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("AverageBlockedTime")) {
                    stats.setAverageBlockedTime(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("QueueSize")) {
                    stats.setQueueSize(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("MaxEnqueueTime")) {
                    stats.setMaxEnqueueTime(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("BlockedSends")) {
                    stats.setBlockedSends(r.getValue() != null ? r.getValue() : 0.0);
                } else if (r.getRequest().getAttribute().equals("DispatchCount")) {
                    stats.setDispatchCount(r.getValue() != null ? r.getValue() : 0.0);
                }
            }
        } finally {
            if (in != null) {
                in.close();
            }
        }
    } else {
        // TODO
    }

    return stats;
}

From source file:org.alfresco.cacheserver.TestEdgeServer.java

@Test
public void test1() throws Exception {
    long nodeInternalId = 1l;
    String nodeId = GUID.generate();
    String nodeVersion = "1";
    String nodePath = "/1/2/3";
    byte[] bytes = "test".getBytes("UTF-8");
    String expectedMimeType = "text/plain";
    Long expectedSize = new Long(bytes.length);
    InputStream nodeContent = new ByteArrayInputStream(bytes);
    ReadableByteChannel channel = null;
    try {//  ww w  .jav  a2  s  .  co  m
        contentGetter.addTestContent(nodeInternalId, nodeId, nodeVersion, nodePath, "test", expectedMimeType);

        edgeServer.repoContentUpdated(Node.build().nodeId(nodeId).versionLabel(nodeVersion).nodePath(nodePath),
                expectedMimeType, expectedSize, true);

        UserDetails userDetails = new User("admin", null, null);
        UserContext.setUser(userDetails);

        ContentReader content = edgeServer.getByNodeId(nodeId, nodeVersion, true);
        channel = content.getChannel();
        ByteBuffer bb = ByteBuffer.allocate(2048);
        channel.read(bb);
        assertNotNull(channel);
        assertEquals(expectedMimeType, content.getMimeType());
        assertEquals(expectedSize, content.getSize());

        ByteBuffer expectedNodeContent = ByteBuffer.wrap("test".getBytes("UTF-8"));

        compare(expectedNodeContent, bb);
    } finally {
        if (nodeContent != null) {
            nodeContent.close();
        }
        if (channel != null) {
            channel.close();
        }
        UserContext.setUser(null);
    }
}

From source file:org.alfresco.contentstore.ChecksumTest.java

protected int applyPatch(ReadableByteChannel inChannel, WritableByteChannel outChannel,
        PatchDocument patchDocument) throws IOException {
    InChannel c = new InChannel(inChannel, patchDocument.getMatchedBlocks(), patchDocument.getBlockSize());

    int totalWritten = 0;

    int blockIndex = c.nextBlock();
    if (blockIndex > -1) {
        for (Patch patch : patchDocument.getPatches()) {
            int lastMatchingBlockIndex = patch.getLastMatchIndex();

            while (blockIndex != -1 && blockIndex <= lastMatchingBlockIndex) {
                int bytesWritten = outChannel.write(c.currentBlock);
                totalWritten += bytesWritten;
                if (bytesWritten != c.blockSize) {
                    throw new RuntimeException("Wrote too few bytes, " + c.blockSize + ", " + bytesWritten);
                }/*w  w  w .jav a  2s.com*/

                blockIndex = c.nextBlock();
                if (blockIndex == -1) {
                    break;
                }
            }

            // apply patch
            int patchSize = patch.getSize();
            ReadableByteChannel patchChannel = Channels.newChannel(patch.getStream());
            ByteBuffer patchBB = ByteBuffer.allocate(patchSize);
            int bytesRead = patchChannel.read(patchBB);
            patchBB.flip();
            int bytesWritten = outChannel.write(patchBB);
            totalWritten += bytesWritten;
            if (bytesWritten != bytesRead) {
                throw new RuntimeException(
                        "Wrote too few bytes, expected " + bytesRead + ", got " + bytesWritten);
            }
        }

        // we're done with all the patches, add the remaining blocks
        while (blockIndex != -1) {
            int bytesWritten = outChannel.write(c.currentBlock);
            totalWritten += bytesWritten;
            if (bytesWritten != c.bytesRead) {
                throw new RuntimeException("Wrote too few bytes");
            }

            blockIndex = c.nextBlock();
        }
    }

    return totalWritten;
}