/// <exception cref="System.IO.IOException"/>
private static void CodecTestWithNOCompression(Configuration conf, string codecClass
)
{
// Create a compressor with NO_COMPRESSION and make sure that
// output is not compressed by comparing the size with the
// original input
CompressionCodec codec = null;
ZlibFactory.SetCompressionLevel(conf, ZlibCompressor.CompressionLevel.NoCompression
);
try
{
codec = (CompressionCodec)ReflectionUtils.NewInstance(conf.GetClassByName(codecClass
), conf);
}
catch (TypeLoadException)
{
throw new IOException("Illegal codec!");
}
Compressor c = codec.CreateCompressor();
// ensure same compressor placed earlier
ByteArrayOutputStream bos = new ByteArrayOutputStream();
CompressionOutputStream cos = null;
// write trivially compressable data
byte[] b = new byte[1 << 15];
Arrays.Fill(b, unchecked ((byte)43));
try
{
cos = codec.CreateOutputStream(bos, c);
cos.Write(b);
}
finally
{
if (cos != null)
{
cos.Close();
}
}
byte[] outbytes = bos.ToByteArray();
// verify data were not compressed
Assert.True("Compressed bytes contrary to configuration(NO_COMPRESSION)"
, outbytes.Length >= b.Length);
}
/// <summary>
/// Get a
/// <see cref="Compressor"/>
/// for the given
/// <see cref="CompressionCodec"/>
/// from the
/// pool or a new one.
/// </summary>
/// <param name="codec">
/// the <code>CompressionCodec</code> for which to get the
/// <code>Compressor</code>
/// </param>
/// <param name="conf">the <code>Configuration</code> object which contains confs for creating or reinit the compressor
/// </param>
/// <returns>
/// <code>Compressor</code> for the given
/// <code>CompressionCodec</code> from the pool or a new one
/// </returns>
public static Compressor GetCompressor(CompressionCodec codec, Configuration conf
)
{
Compressor compressor = Borrow(compressorPool, codec.GetCompressorType());
if (compressor == null)
{
compressor = codec.CreateCompressor();
Log.Info("Got brand-new compressor [" + codec.GetDefaultExtension() + "]");
}
else
{
compressor.Reinit(conf);
if (Log.IsDebugEnabled())
{
Log.Debug("Got recycled compressor");
}
}
UpdateLeaseCount(compressorCounts, compressor, 1);
return(compressor);
}