Examples of etch.util.FlexBuffer

etch.util.FlexBuffer
A FlexBuffer wraps a byte array and manages the active region of it (0..length). It also supports dynamically extending the buffer as needed. A FlexBuffer also has an index (read or write cursor). The various get and put operations always occur at the current index, with the index adjusted appropriately afterward. Get will not move index past length. If put needs to move index past length, length is also adjusted. This may cause the byte array to be re-allocated to a larger size.

    final InputStream is = inputStream;
    if (is == null)
      throw new IOException( "socket closed" );
    
    // TODO allow setting input buffer size.
    final FlexBuffer buf = new FlexBuffer( new byte[8192] );
    
    try
    {
      while (isStarted())
      {
//        System.out.println( "reading" );
        int n = is.read( buf.getBuf() );
//        System.out.println( "read "+n );
        
        if (n <= 0)
          break;
        
        buf.setLength( n );
        buf.setIndex( 0 );
        fireData( buf );
      }
    }
    catch ( SSLHandshakeException ex )
    {

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        buf.flip();
        byte[] bbuf = new byte[buf.remaining()];
        buf.get( bbuf );
        
        FlexBuffer fbuf = new FlexBuffer( bbuf );
        session.sessionData( null, fbuf );
      }
      finally
      {
        if (buf != null)

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    final InputStream is = inputStream;
    if (is == null)
      throw new IOException( "socket closed" );
    
    // TODO allow setting input buffer size.
    final FlexBuffer buf = new FlexBuffer( new byte[8192] );
    
    try
    {
      while (isStarted())
      {
//        System.out.println( "reading" );
        int n = is.read( buf.getBuf() );
//        System.out.println( "read "+n );
        
        if (n <= 0)
          break;
        
        buf.setLength( n );
        buf.setIndex( 0 );
        fireData( buf );
      }
    }
    catch ( SocketException e )
    {

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  @Override
  protected void readSocket() throws Exception
  {
    final DatagramSocket s = checkSocket();
    // TODO allow buffer size to be specified.
    final FlexBuffer buf = new FlexBuffer( new byte[8192] );
    final DatagramPacket p = new DatagramPacket( new byte[0], 0 );
    
    try
    {
      while (isStarted())
      {
        p.setData( buf.getBuf() );
        
        s.receive( p );
        
        buf.setIndex( 0 );
        buf.setLength( p.getLength() );
        
        if (s.isConnected())
          session.sessionPacket( null, buf );
        else
          session.sessionPacket( getWho( p.getAddress(), p.getPort() ), buf );

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    Message msg = new Message( t, vf );
    msg.put( f, value );
//    System.out.println( "msg = "+msg );
    
    BinaryTaggedDataOutput btdo = new BinaryTaggedDataOutput( vf, "none:" );
    FlexBuffer buf = new FlexBuffer();
    
    btdo.writeMessage( msg, buf );
    
    buf.setIndex( 0 );
    byte[] b = buf.getAvailBytes();
//    dump( b );
    assertArrayEquals( expectedBytes, b );
  }

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    }
  }
  
  private byte[] msg2bytes( Message msg, Boolean stringTypeAndField ) throws IOException
  {
    FlexBuffer buf = new FlexBuffer();
    
    URL u = new URL( "none:" );
    if (stringTypeAndField != null)
      u.addTerm( BinaryTaggedDataOutput.STRING_TYPE_AND_FIELD, stringTypeAndField );
    
    BinaryTaggedDataOutput btdo = new BinaryTaggedDataOutput( vf, u.toString() );
    btdo.writeMessage( msg, buf );
    buf.setIndex( 0 );
    return buf.getAvailBytes();
  }

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  {
    Level oldLevel = vf.setLevel( level );
    try
    {
      BinaryTaggedDataInput btdi = new BinaryTaggedDataInput( vf, "none:" );
      return btdi.readMessage( new FlexBuffer( buf ) );
    }
    finally
    {
      vf.setLevel( oldLevel );
    }

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  /** @throws Exception */
  @Test
  public void packet1() throws Exception
  {
    FlexBuffer buf = new FlexBuffer( new byte[]
    { VERSION, 1, 0, NONE } );
    
    session.msg_handled = true;
    
    m.sessionPacket( who, buf );

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  /** @throws Exception */
  @Test
  public void packet2() throws Exception
  {
    FlexBuffer buf = new FlexBuffer( new byte[]
    { VERSION, 1, 0, NONE } );
    
    session.msg_handled = false;
    
    m.sessionPacket( who, buf );

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  /** @throws Exception */
  @Test
  public void packet3() throws Exception
  {
    FlexBuffer buf = new FlexBuffer( new byte[]
    { VERSION, 2, 0, NONE } );
    
    session.msg_handled = true;
    
    m.sessionPacket( who, buf );

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