Examples of org.apache.mina.common.IoBuffer

org.apache.mina.common.IoBuffer
cate heap buffer by default. IoBuffer.setUseDirectBuffer(false); // A new heap buffer is returned. IoBuffer buf = IoBuffer.allocate(1024);

Wrapping existing NIO buffers and arrays

This class provides a few wrap(...) methods that wraps any NIO buffers and byte arrays.
AutoExpand

Writing variable-length data using NIO ByteBuffers is not really easy, and it is because its size is fixed. {@link IoBuffer} introduces autoExpand property. If autoExpand property is true, you never get {@link BufferOverflowException} or{@link IndexOutOfBoundsException} (except when index is negative).It automatically expands its capacity and limit value. For example:
```
 String greeting = messageBundle.getMessage( "hello" ); IoBuffer buf = IoBuffer.allocate( 16 ); // Turn on autoExpand (it is off by default) buf.setAutoExpand( true ); buf.putString( greeting, utf8encoder ); 
```
The underlying {@link ByteBuffer} is reallocated by {@link IoBuffer} behindthe scene if the encoded data is larger than 16 bytes in the example above. Its capacity will double, and its limit will increase to the last position the string is written.

AutoShrink

You might also want to decrease the capacity of the buffer when most of the allocated memory area is not being used. {@link IoBuffer} providesautoShrink property to take care of this issue. If autoShrink is turned on, {@link IoBuffer} halves the capacityof the buffer when {@link #compact()} is invoked and only 1/4 or less ofthe current capacity is being used.
You can also {@link #shrink()} method manually to shrink the capacity ofthe buffer.
The underlying {@link ByteBuffer} is reallocated by {@link IoBuffer} behindthe scene, and therefore {@link #buf()} will return a different{@link ByteBuffer} instance once capacity changes. Please also note{@link #compact()} or {@link #shrink()} will not decrease the capacity ifthe new capacity is less than the {@link #minimumCapacity()} of the buffer.
Derived Buffers

Derived buffers are the buffers which were created by {@link #duplicate()}, {@link #slice()}, or {@link #asReadOnlyBuffer()}. They are useful especially when you broadcast the same messages to multiple {@link IoSession}s. Please note that the buffer derived from and its derived buffers are not both auto-expandable neither auto-shrinkable. Trying to call {@link #setAutoExpand(boolean)} or {@link #setAutoShrink(boolean)}with true parameter will raise an {@link IllegalStateException}.

Changing Buffer Allocation Policy

{@link IoBufferAllocator} interface lets you override the default buffermanagement behavior. There are two allocators provided out-of-the-box:
- {@link SimpleBufferAllocator} (default)
- {@link CachedBufferAllocator}
You can implement your own allocator and use it by calling {@link #setAllocator(IoBufferAllocator)}.
@author The Apache MINA Project (dev@mina.apache.org) @version $Rev: 637706 $, $Date: 2008-03-17 12:18:43 +0900 (월, 17 3월 2008) $


        if (message instanceof InputStream) {


            InputStream inputStream = (InputStream) message;


            IoBuffer buffer = getNextBuffer(inputStream);
            if (buffer == null) {
                // End of stream reached.
                writeRequest.getFuture().setWritten();
                nextFilter.messageSent(session, writeRequest);
            } else {

View Full Code Here

                .getAttribute(CURRENT_STREAM);


        if (inputStream == null) {
            nextFilter.messageSent(session, writeRequest);
        } else {
            IoBuffer buffer = getNextBuffer(inputStream);


            if (buffer == null) {
                // End of stream reached.
                session.removeAttribute(CURRENT_STREAM);
                WriteRequest currentWriteRequest = (WriteRequest) session

View Full Code Here


        if (n == -1 && off == 0) {
            return null;
        }


        IoBuffer buffer = IoBuffer.wrap(bytes, 0, off);


        return buffer;
    }

View Full Code Here

        if (manipulateWrites) {
            // manipulate bytes
            if (writeRequest.getMessage() instanceof IoBuffer) {
                manipulateIoBuffer(session, (IoBuffer) writeRequest
                        .getMessage());
                IoBuffer buffer = insertBytesToNewIoBuffer(session,
                        (IoBuffer) writeRequest.getMessage());
                if (buffer != null) {
                    writeRequest = new DefaultWriteRequest(buffer, writeRequest
                            .getFuture(), writeRequest.getDestination());
                }

View Full Code Here

            Object message) throws Exception {
        if (manipulateReads) {
            if (message instanceof IoBuffer) {
                // manipulate bytes
                manipulateIoBuffer(session, (IoBuffer) message);
                IoBuffer buffer = insertBytesToNewIoBuffer(session,
                        (IoBuffer) message);
                if (buffer != null) {
                    message = buffer;
                }
            } else {

View Full Code Here

            int pos = rng.nextInt(buffer.remaining()) - 1;


            // how many byte to insert ?
            int count = rng.nextInt(maxInsertByte-1)+1;


            IoBuffer newBuff = IoBuffer.allocate(buffer.remaining() + count);
            for (int i = 0; i < pos; i++)
                newBuff.put(buffer.get());
            for (int i = 0; i < count; i++) {
                newBuff.put((byte) (rng.nextInt(256)));
            }
            while (buffer.remaining() > 0) {
                newBuff.put(buffer.get());
            }
            newBuff.flip();


            logger.info("Inserted " + count + " bytes.");
            logger.info(newBuff.getHexDump());
            return newBuff;
        }
        return null;
    }

View Full Code Here

            // how many byte to remove ?
            int count = rng.nextInt(buffer.remaining() - pos) + 1;
            if (count == buffer.remaining())
                count = buffer.remaining() - 1;


            IoBuffer newBuff = IoBuffer.allocate(buffer.remaining() - count);
            for (int i = 0; i < pos; i++)
                newBuff.put(buffer.get());


            buffer.skip(count); // hole
            while (newBuff.remaining() > 0)
                newBuff.put(buffer.get());
            newBuff.flip();
            // copy the new buffer in the old one
            buffer.rewind();
            buffer.put(newBuff);
            buffer.flip();
            logger.info("Removed " + count + " bytes at position " + pos + ".");

View Full Code Here

        return messageQueue;
    }


    public void write(Object encodedMessage) {
        if (encodedMessage instanceof IoBuffer) {
            IoBuffer buf = (IoBuffer) encodedMessage;
            if (buf.hasRemaining()) {
                messageQueue.offer(buf);
            } else {
                throw new IllegalArgumentException(
                        "buf is empty. Forgot to call flip()?");
            }

View Full Code Here

        for (Object b : messageQueue) {
            sum += ((IoBuffer) b).remaining();
        }


        // Allocate a new BB that will contain all fragments
        IoBuffer newBuf = IoBuffer.allocate(sum);


        // and merge all.
        for (; ;) {
            IoBuffer buf = (IoBuffer) messageQueue.poll();
            if (buf == null) {
                break;
            }


            newBuf.put(buf);

View Full Code Here

            throws Exception {
        int terminatorPos = in.indexOf(terminator);


        if (terminatorPos >= 0) {
            int limit = in.limit();
            IoBuffer product;


            if (in.position() < terminatorPos) {
                in.limit(terminatorPos);


                if (buffer == null) {

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.apache.mina.common.IoBuffer

org.apache.mina.example.echoserver.AbstractTest

org.apache.mina.example.echoserver.ConnectorTest

org.apache.mina.example.imagine.step1.codec.ImageRequestEncoder

org.apache.mina.example.imagine.step1.codec.ImageResponseEncoder

org.apache.mina.example.netcat.NetCatProtocolHandler

org.apache.mina.example.proxy.AbstractProxyIoHandler

org.apache.mina.example.sumup.codec.AbstractMessageEncoder

org.apache.mina.example.udp.client.MemMonClient

org.apache.mina.example.udp.MemoryMonitorHandler

org.apache.mina.filter.codec.AbstractProtocolEncoderOutput

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of org.apache.mina.common.IoBuffer

Wrapping existing NIO buffers and arrays

AutoExpand

AutoShrink

Derived Buffers

Changing Buffer Allocation Policy

Related Classes of org.apache.mina.common.IoBuffer