Example usage for java.nio.channels ReadableByteChannel isOpen

Introduction

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

Prototype

public boolean isOpen();

Source Link

Document

Tells whether or not this channel is open.

Usage

From source file:it.geosolutions.tools.io.file.IOUtils.java

/**
 * Copies the content of the source channel onto the destination channel.
 * //from  ww w .  jav a2  s  . c o m
 * @param bufferSize
 *            size of the temp buffer to use for this copy.
 * @param source
 *            the source {@link ReadableByteChannel}.
 * @param destination
 *            the destination {@link WritableByteChannel};.
 * @throws IOException
 *             in case something bad happens.
 */
public static void copyChannel(int bufferSize, ReadableByteChannel source, WritableByteChannel destination)
        throws IOException {

    Objects.notNull(source, destination);
    if (!source.isOpen() || !destination.isOpen())
        throw new IllegalStateException("Source and destination channels must be open.");

    final java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocateDirect(bufferSize);
    while (source.read(buffer) != -1) {
        // prepare the buffer for draining
        buffer.flip();

        // write to destination
        while (buffer.hasRemaining())
            destination.write(buffer);

        // clear
        buffer.clear();

    }

}

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From source file:org.callimachusproject.server.AccessLog.java

InputStream logOnClose(final String addr, final String username, final String line, final int code,
        final long length, final Header referer, final Header agent, InputStream in) {
    final ReadableByteChannel delegate = ChannelUtil.newChannel(in);
    return ChannelUtil.newInputStream(new ReadableByteChannel() {
        private long size = 0;
        private boolean complete;
        private boolean error;

        public boolean isOpen() {
            return delegate.isOpen();
        }// ww  w  .  j  a  va2  s. c o  m

        public synchronized void close() throws IOException {
            delegate.close();
            if (!complete) {
                complete = true;
                if (error) {
                    log(addr, username, line, 599, size, referer, agent);
                } else if (size < length) {
                    log(addr, username, line, 499, size, referer, agent);
                } else {
                    log(addr, username, line, code, size, referer, agent);
                }
            }
        }

        public synchronized int read(ByteBuffer dst) throws IOException {
            error = true;
            int read = delegate.read(dst);
            if (read < 0) {
                complete = true;
                log(addr, username, line, code, size, referer, agent);
            } else {
                size += read;
            }
            error = false;
            return read;
        }
    });
}

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From source file:org.darkware.wpman.security.ChecksumDatabase.java

/**
 * Perform a checksum calculation on the given {@link ReadableByteChannel}. Other code should not create
 * implementations which are dependant on any particular characteristics of the checksum, but the checksum
 * is very likely to be based on a cryptographic-strength hash. The results of the checksum are encoded as
 * a base64 {@code String}.//w  w w .  j a  v  a2  s.  com
 *
 * @param channel The {@code ReadableByteChannel} to read data from.
 * @return A Base64 encoded {@code String} representing the checksum.
 * @throws IOException If there was an error while reading data from the channel.
 * @see Base64#encodeBase64String(byte[])
 */
protected String doChecksum(ReadableByteChannel channel) throws IOException {
    Hasher hasher = Hashing.sha256().newHasher();

    final ByteBuffer block = ByteBuffer.allocate(4096);
    while (channel.isOpen()) {
        int bytesRead = channel.read(block);
        if (bytesRead > 0) {
            block.flip();
            hasher.putBytes(block.array(), 0, block.limit());
            block.clear();
        } else if (bytesRead == -1) {
            channel.close();
        }
    }

    return Base64.encodeBase64String(hasher.hash().asBytes());
}

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From source file:org.geoserver.rest.util.IOUtils.java

/**
 * Copies the content of the source channel onto the destination channel.
 * /*from w w  w .  ja v a 2 s  . c  o  m*/
 * @param bufferSize size of the temp buffer to use for this copy.
 * @param source the source {@link ReadableByteChannel}.
 * @param destination the destination {@link WritableByteChannel};.
 * @throws IOException in case something bad happens.
 */
public static void copyChannel(int bufferSize, ReadableByteChannel source, WritableByteChannel destination)
        throws IOException {

    inputNotNull(source, destination);
    if (!source.isOpen() || !destination.isOpen())
        throw new IllegalStateException("Source and destination channels must be open.");

    final java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocateDirect(bufferSize);
    while (source.read(buffer) != -1) {
        //prepare the buffer for draining
        buffer.flip();

        //write to destination
        while (buffer.hasRemaining())
            destination.write(buffer);

        //clear
        buffer.clear();

    }

}

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