public HdfsSystemDescriptor withWriteCompressionType(String writeCompressionType) {
    this.writeCompressionType = Optional.ofNullable(StringUtils.stripToNull(writeCompressionType));
    return this;
  }
Simple, human-readable label for various compression options. HdfsWriter implementations
can choose how to handle these individually, or throw an exception. Example: "none", "gzip", ...
@param writeCompressionType compression type for writer.
@return this system descriptor
samza-hdfs/src/main/java/org/apache/samza/system/hdfs/descriptors/HdfsSystemDescriptor.java