Examples of io.netty.buffer.ByteBuf.clear()

io.netty.buffer.ByteBuf.clear()
Sets the {@code readerIndex} and {@code writerIndex} of this buffer to{@code 0}. This method is identical to {@link #setIndex(int,int) setIndex(0, 0)}.
Please note that the behavior of this method is different from that of NIO buffer, which sets the {@code limit} tothe {@code capacity} of the buffer.

    final int _0 = 0;
    final int _9 = 9;
    final ByteBuf buffer = ByteBufUtil.createBuffer(_9);


    long longVal = 0;
    buffer.clear();
    HadoopWritables.writeVLong(buffer, _0, _9, 0);
    longVal = HadoopWritables.readVLong(buffer, _0, _9);
    assertEquals(longVal, 0);


    buffer.clear();

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    buffer.clear();
    HadoopWritables.writeVLong(buffer, _0, _9, 0);
    longVal = HadoopWritables.readVLong(buffer, _0, _9);
    assertEquals(longVal, 0);


    buffer.clear();
    HadoopWritables.writeVLong(buffer, _0, _9, Long.MAX_VALUE);
    longVal = HadoopWritables.readVLong(buffer, _0, _9);
    assertEquals(longVal, Long.MAX_VALUE);


    buffer.clear();

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    buffer.clear();
    HadoopWritables.writeVLong(buffer, _0, _9, Long.MAX_VALUE);
    longVal = HadoopWritables.readVLong(buffer, _0, _9);
    assertEquals(longVal, Long.MAX_VALUE);


    buffer.clear();
    HadoopWritables.writeVLong(buffer, _0, _9, Long.MIN_VALUE);
    longVal = HadoopWritables.readVLong(buffer, _0, _9);
    assertEquals(longVal, Long.MIN_VALUE);


    int intVal = 0;

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    HadoopWritables.writeVLong(buffer, _0, _9, Long.MIN_VALUE);
    longVal = HadoopWritables.readVLong(buffer, _0, _9);
    assertEquals(longVal, Long.MIN_VALUE);


    int intVal = 0;
    buffer.clear();
    HadoopWritables.writeVInt(buffer, _0, _9, 0);
    intVal = HadoopWritables.readVInt(buffer, _0, _9);
    assertEquals(intVal, 0);


    buffer.clear();

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    buffer.clear();
    HadoopWritables.writeVInt(buffer, _0, _9, 0);
    intVal = HadoopWritables.readVInt(buffer, _0, _9);
    assertEquals(intVal, 0);


    buffer.clear();
    HadoopWritables.writeVInt(buffer, _0, _9, Integer.MAX_VALUE);
    intVal = HadoopWritables.readVInt(buffer, _0, _9);
    assertEquals(intVal, Integer.MAX_VALUE);


    buffer.clear();

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    buffer.clear();
    HadoopWritables.writeVInt(buffer, _0, _9, Integer.MAX_VALUE);
    intVal = HadoopWritables.readVInt(buffer, _0, _9);
    assertEquals(intVal, Integer.MAX_VALUE);


    buffer.clear();
    HadoopWritables.writeVInt(buffer, _0, _9, Integer.MIN_VALUE);
    intVal = HadoopWritables.readVInt(buffer, _0, _9);
    assertEquals(intVal, Integer.MIN_VALUE);
  }

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        // Encrypt
        cipher.init( true, secret );
        cipher.cipher( nativePlain, out );
        Assert.assertEquals( nativeCiphered, out );


        out.clear();


        // Decrypt
        cipher.init( false, secret );
        cipher.cipher( nativeCiphered, out );
        nativePlain.resetReaderIndex();

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        cipher.init( true, secret );
        long start = System.currentTimeMillis();
        for ( int i = 0; i < BENCHMARK_COUNT; i++ )
        {
            cipher.cipher( nativePlain, out );
            out.clear();
        }
        System.out.println( String.format( "Encryption Iteration: %d, Elapsed: %d ms", BENCHMARK_COUNT, System.currentTimeMillis() - start ) );


        // Decrypt
        cipher.init( false, secret );

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        cipher.init( false, secret );
        start = System.currentTimeMillis();
        for ( int i = 0; i < BENCHMARK_COUNT; i++ )
        {
            cipher.cipher( nativeCiphered, out );
            out.clear();
        }
        System.out.println( String.format( "Decryption Iteration: %d, Elapsed: %d ms", BENCHMARK_COUNT, System.currentTimeMillis() - start ) );
    }
}

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    {
        ByteBuf buf = Unpooled.buffer(5, 5);
        ByteBufUtils.writeVarInt(buf, 1, 1);
        assertArrayEquals("1 as byte[] is [1]", new byte[] { 1, 0, 0, 0, 0 }, buf.array());


        buf.clear();
        ByteBufUtils.writeVarInt(buf, 127, 1);
        assertArrayEquals("127 as byte[] is [127]", new byte[] { 127, 0, 0, 0, 0 }, buf.array());


        buf.clear();
        ByteBufUtils.writeVarInt(buf, 128, 2);

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