Example usage for io.netty.buffer Unpooled wrappedBuffer

Introduction

In this page you can find the example usage for io.netty.buffer Unpooled wrappedBuffer.

Prototype

public static ByteBuf wrappedBuffer(ByteBuffer... buffers)

Source Link

Document

Creates a new big-endian composite buffer which wraps the slices of the specified NIO buffers without copying them.

Usage

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testWrap() {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    assertTrue(buffer.isReadable());//www  . j  a  v a2  s . com
    assertFalse(buffer.isWriteable());
    assertEquals(10, buffer.readableBytes());
    assertEquals(0, buffer.writeableBytes());
    assertEquals(10, buffer.capacity());

    assertTrue(buffer.hasArray());
}

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testDuplicateSlice() throws IOException {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    Buffer slice = buffer.readerIndex(3).slice(2);

    ReadableBuffer duplicate = slice.duplicate();

    assertEquals(2, duplicate.readableBytes());
    assertEquals(0, duplicate.readerIndex());
    assertEquals(0, duplicate.readByte());
    assertEquals(0, duplicate.readByte());
}

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testSliceWithIndex() {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    Buffer slice = buffer.slice(3, 2);

    assertEquals(2, slice.readableBytes());
    assertEquals(0, slice.readerIndex());
    assertEquals(0, slice.readByte());/*from  ww  w. ja v a 2  s .  c  om*/
    assertEquals(0, slice.readByte());

    assertTrue(buffer.isReadable());
    assertFalse(buffer.isWriteable());
    assertEquals(10, buffer.readableBytes());
    assertEquals(0, buffer.writeableBytes());
    assertEquals(10, buffer.capacity());
    assertEquals(2, buffer.readByte());
    assertEquals(-120, buffer.readByte());
}

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testSliceDuplicate() {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    Buffer slice = (Buffer) buffer.slice(5).duplicate();

    assertFalse(slice.isWriteable());/*from   www  . j a v a 2 s .  c o  m*/
    assertTrue(slice.isReadable());
    assertEquals(0, slice.writeableBytes());
    assertEquals(5, slice.readableBytes());

    slice = (Buffer) buffer.slice(3).duplicate();

    assertFalse(slice.isWriteable());
    assertTrue(slice.isReadable());
    assertEquals(0, slice.writeableBytes());
    assertEquals(3, slice.readableBytes());
}

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testRead() {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    assertEquals(2, buffer.readByte());//from   ww  w  . j a  v  a 2  s . c  om
    assertTrue(buffer.isReadable());
    assertEquals(-120, buffer.readByte());
    assertTrue(buffer.isReadable());
    buffer.skipBytes(3);
    assertTrue(buffer.isReadable());

    byte[] bytes = new byte[4];
    buffer.readBytes(bytes);
    assertArrayEquals(new byte[] { 4, 5, 6, 7 }, bytes);
    assertTrue(buffer.isReadable());

    buffer.readBytes(bytes, 0, 1);
    assertArrayEquals(new byte[] { 6, 5, 6, 7 }, bytes);
    assertFalse(buffer.isReadable());
}

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testGet() {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    assertEquals(2, buffer.getByte(0));// ww w . j av  a  2s. c om
    assertEquals(-120, buffer.getByte(1));
    assertEquals(2, buffer.readByte());
    assertEquals(6, buffer.getByte(9));

    assertTrue(buffer.isReadable());

    try {

        buffer.getByte(10);
        fail();

    } catch (IndexOutOfBoundsException e) {
        assertTrue(true);
    }
}

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testReadSlice() throws IOException {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    ByteReader slice = buffer.slice(2);/*  w  w w  . j  a v  a2  s .co m*/

    assertEquals(2, slice.readByte());
    assertTrue(slice.isReadable());
    assertEquals(-120, slice.readByte());

    assertFalse(slice.isReadable());

    assertTrue(buffer.isReadable());
    slice = buffer.slice(8);

    assertFalse(buffer.isReadable());

    slice.skipBytes(3);
    assertTrue(slice.isReadable());

    byte[] bytes = new byte[4];
    slice.readBytes(bytes);
    assertArrayEquals(new byte[] { 4, 5, 6, 7 }, bytes);
    assertTrue(slice.isReadable());

    slice.readBytes(bytes, 0, 1);
    assertArrayEquals(new byte[] { 6, 5, 6, 7 }, bytes);
    assertFalse(slice.isReadable());
}

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testReaderIndexRead() {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    assertEquals(2, buffer.readByte());//from w  w  w  . jav a 2s  .c om
    assertTrue(buffer.isReadable());
    assertEquals(-120, buffer.readByte());
    assertTrue(buffer.isReadable());
    buffer.skipBytes(3);
    assertTrue(buffer.isReadable());

    buffer.readerIndex(0);

    byte[] bytes = new byte[4];
    buffer.readBytes(bytes);
    assertArrayEquals(new byte[] { 2, -120, 0, 0 }, bytes);
    assertTrue(buffer.isReadable());

    buffer.readerIndex(8);

    buffer.readBytes(bytes, 0, 1);
    assertArrayEquals(new byte[] { 7, -120, 0, 0 }, bytes);
    assertTrue(buffer.isReadable());

    try {

        buffer.readerIndex(12);
        fail();

    } catch (IndexOutOfBoundsException e) {

        assertTrue(true);
    }
}

From source file:io.horizondb.io.buffers.NettyBufferTest.java

License:Apache License

@Test
public void testGetMultipleBytes() {

    ByteBuf byteBuf = Unpooled.wrappedBuffer(new byte[] { 2, -120, 0, 0, 0, 4, 5, 6, 7, 6 });

    NettyBuffer buffer = new NettyBuffer(byteBuf);

    byte[] bytes = new byte[4];

    buffer.getBytes(0, bytes, 0, 4);//from www  . j  a  v a 2  s .  co m
    assertArrayEquals(new byte[] { 2, -120, 0, 0 }, bytes);

    buffer.getBytes(1, bytes, 0, 4);
    assertArrayEquals(new byte[] { -120, 0, 0, 0 }, bytes);
    assertEquals(2, buffer.readByte());
    buffer.getBytes(9, bytes, 3, 1);
    assertArrayEquals(new byte[] { -120, 0, 0, 6 }, bytes);

    assertTrue(buffer.isReadable());

    try {

        buffer.getBytes(9, bytes, 3, 2);
        fail();

    } catch (IndexOutOfBoundsException e) {
        assertTrue(true);
    }
}

From source file:io.hydramq.disk.DiskSegment.java

License:Open Source License

public Message read(final int messageOffset) throws HydraRuntimeException {
    if (!(messageOffset < size())) {
        throw outOfBoundsException();
    }/*w  w w  . j  a va  2  s  .  co m*/
    try {
        // First, use the index to find the starting byte of the message in the data file
        ByteBuffer indexReadBuffer = ByteBuffer.allocate(4);
        indexReadBuffer.clear();
        while (indexReadBuffer.hasRemaining()) {
            index.read(indexReadBuffer, messageOffset * INDEX_ENTRY_SIZE + indexReadBuffer.position());
        }
        indexReadBuffer.flip();
        int dataOffset = indexReadBuffer.getInt();
        // Second, get the message size from the first integer of the message
        indexReadBuffer.clear();
        while (indexReadBuffer.hasRemaining()) {
            data.read(indexReadBuffer, dataOffset + indexReadBuffer.position());
        }
        indexReadBuffer.flip();
        int dataSize = indexReadBuffer.getInt();
        ByteBuffer buffer = ByteBuffer.allocateDirect(dataSize);
        while (buffer.hasRemaining()) {
            data.read(buffer, dataOffset + 4 + buffer.position());
        }
        buffer.flip();
        return conversionContext.read(Message.class, Unpooled.wrappedBuffer(buffer));
    } catch (Exception ex) {
        throw new HydraRuntimeException("Error reading message in segment " + segmentDirectory.toString()
                + " for message offset " + messageOffset, ex);
    }
}