def __init__(self, ix, poolclass=None, timeout=0.0, delay=0.1, _lk=True,
limitmb=128, docbase=0, codec=None, **kwargs):
# Lock the index
self.writelock = None
if _lk:
self.writelock = ix.lock("WRITELOCK")
if not try_for(self.writelock.acquire, timeout=timeout,
delay=delay):
raise LockError
# Get info from the index
self.storage = ix.storage
self.indexname = ix.indexname
info = ix._read_toc()
self.generation = info.generation + 1
self.schema = info.schema
self.segments = info.segments
self.docnum = self.docbase = docbase
self._setup_doc_offsets()
# Internals
poolprefix = "whoosh_%s_" % self.indexname
self.pool = PostingPool(limitmb=limitmb, prefix=poolprefix)
self.newsegment = Segment(self.indexname, 0)
self.is_closed = False
self._added = False
# Set up writers
if codec is None:
from whoosh.codec.standard import StdCodec
codec = StdCodec(self.storage)
self.codec = codec
self.perdocwriter = codec.per_document_writer(self.newsegment)
self.fieldwriter = codec.field_writer(self.newsegment)
