def disperse(fragment):
"""
Disperse the FragmentStream instance.
@param fragment: FragmentStream instnace
@return list instance: contains the generated BlockStreams
"""
conf = SADConfig()
dis = conf.getdispath()
cache = conf.getstoragepath()
bname = "%s-%05d.frag" % (fragment.getfilename(),fragment.getpos())
fragname = os.path.join( cache, bname )
disp = [ "%s-%d.ida" % (fragname, k) for k in range(5) ]
inidis = Messages.Dispersing % str(fragment)
enddis = Messages.Dispersed % str(fragment)
fragment.savetofile(fragname)
logging.info(inidis)
subprocess.call([dis, fragname])
logging.info(enddis)
blocks = list()
for k, d in enumerate(disp):
b = BlockStream(
os.path.basename(d),
"IDA",
fragment.getid(),
k
)
b.loadfromfile(d)
blocks.append(b)
return blocks
