def do_open():
try:
source = open(self.filename)
gen = iter_range(source, query.key, query.end_key)
for line in gen:
yield line
finally:
source.close()
def compute_page_range(self, reader, query):
# Get End
end_iter = search(reader, query.end_key, prev_size=1)
try:
end_line = end_iter.next()
except StopIteration:
end_line = read_last_line(reader)
# Get Start
first_iter = iter_range(reader, query.key, query.end_key, prev_size=1)
try:
first_line = first_iter.next()
except StopIteration:
reader.close()
raise
first = IDXObject(first_line)
end = IDXObject(end_line)
diff = end['lineno'] - first['lineno']
pagesize = query.page_size
if not pagesize:
pagesize = self.max_blocks
total_pages = diff / pagesize + 1
if query.page_count:
info = dict(pages=total_pages, pageSize=pagesize, blocks=diff + 1)
yield json.dumps(info)
reader.close()
return
curr_page = query.page
if curr_page >= total_pages or curr_page < 0:
msg = 'Page {0} invalid: First Page is 0, Last Page is {1}'
reader.close()
raise CDXException(msg.format(curr_page, total_pages - 1))
startline = curr_page * pagesize
endline = min(startline + pagesize - 1, diff)
if curr_page == 0:
yield first_line
else:
startline -= 1
idxiter = itertools.islice(first_iter, startline, endline)
for idx in idxiter:
yield idx
reader.close()
def load_cdx(self, query):
self.load_loc()
reader = open(self.summary)
idx_iter = iter_range(reader, query.key, query.end_key, prev_size=1)
if query.secondary_index_only:
return idx_iter
else:
blocks = self.idx_to_cdx(idx_iter, query)
def gen_cdx():
for blk in blocks:
for cdx in blk:
yield cdx
return gen_cdx()
def load_cdx(self, query):
self.load_loc()
reader = open(self.summary)
idx_iter = iter_range(reader,
query.key,
query.end_key,
prev_size=1)
if query.secondary_index_only:
return idx_iter
else:
blocks = self.idx_to_cdx(idx_iter, query)
def gen_cdx():
for blk in blocks:
for cdx in blk:
yield cdx
return gen_cdx()
def _do_iter(self, fh, params):
for line in iter_range(fh, params['key'], params['end_key']):
yield CDXObject(line)
def compute_page_range(self, reader, query):
pagesize = query.page_size
if not pagesize:
pagesize = self.max_blocks
else:
pagesize = int(pagesize)
last_line = None
# Get End
end_iter = search(reader, query.end_key, prev_size=1)
try:
end_line = six.next(end_iter)
except StopIteration:
last_line = read_last_line(reader)
end_line = last_line
# Get Start
first_iter = iter_range(reader, query.key, query.end_key, prev_size=1)
try:
first_line = six.next(first_iter)
except StopIteration:
if end_line == last_line and query.key >= last_line:
first_line = last_line
else:
reader.close()
if query.page_count:
yield self._page_info(0, pagesize, 0)
return
first = IDXObject(first_line)
end = IDXObject(end_line)
try:
blocks = end['lineno'] - first['lineno']
total_pages = int(blocks / pagesize) + 1
except:
blocks = -1
total_pages = 1
if query.page_count:
# same line, so actually need to look at cdx
# to determine if it exists
if blocks == 0:
try:
block_cdx_iter = self.idx_to_cdx([first_line], query)
block = six.next(block_cdx_iter)
cdx = six.next(block)
except StopIteration:
total_pages = 0
blocks = -1
yield self._page_info(total_pages, pagesize, blocks + 1)
reader.close()
return
curr_page = query.page
if curr_page >= total_pages or curr_page < 0:
msg = 'Page {0} invalid: First Page is 0, Last Page is {1}'
reader.close()
raise CDXException(msg.format(curr_page, total_pages - 1))
startline = curr_page * pagesize
endline = startline + pagesize - 1
if blocks >= 0:
endline = min(endline, blocks)
if curr_page == 0:
yield first_line
else:
startline -= 1
idxiter = itertools.islice(first_iter, startline, endline)
for idx in idxiter:
yield idx
reader.close()
def do_open():
with open(self.filename, 'rb') as source:
gen = iter_range(source, query.key, query.end_key)
for line in gen:
yield line
def _do_load_file(filename, query):
with open(filename, 'rb') as source:
gen = iter_range(source, query.key, query.end_key)
for line in gen:
yield line
def do_load(fh):
with fh:
gen = iter_range(fh, params['key'], params['end_key'])
for line in gen:
yield CDXObject(line)
def compute_page_range(self, reader, query):
pagesize = query.page_size
if not pagesize:
pagesize = self.max_blocks
else:
pagesize = int(pagesize)
last_line = None
# Get End
end_iter = search(reader, query.end_key, prev_size=1)
try:
end_line = end_iter.next()
except StopIteration:
last_line = read_last_line(reader)
end_line = last_line
# Get Start
first_iter = iter_range(reader,
query.key,
query.end_key,
prev_size=1)
try:
first_line = first_iter.next()
except StopIteration:
if end_line == last_line and query.key >= last_line:
first_line = last_line
else:
reader.close()
if query.page_count:
yield self._page_info(0, pagesize, 0)
return
else:
raise
first = IDXObject(first_line)
end = IDXObject(end_line)
try:
blocks = end['lineno'] - first['lineno']
total_pages = blocks / pagesize + 1
except:
blocks = -1
total_pages = 1
if query.page_count:
# same line, so actually need to look at cdx
# to determine if it exists
if blocks == 0:
try:
block_cdx_iter = self.idx_to_cdx([first_line], query)
block = block_cdx_iter.next()
cdx = block.next()
except StopIteration:
total_pages = 0
blocks = -1
yield self._page_info(total_pages, pagesize, blocks + 1)
reader.close()
return
curr_page = query.page
if curr_page >= total_pages or curr_page < 0:
msg = 'Page {0} invalid: First Page is 0, Last Page is {1}'
reader.close()
raise CDXException(msg.format(curr_page, total_pages - 1))
startline = curr_page * pagesize
endline = startline + pagesize - 1
if blocks >= 0:
endline = min(endline, blocks)
if curr_page == 0:
yield first_line
else:
startline -= 1
idxiter = itertools.islice(first_iter, startline, endline)
for idx in idxiter:
yield idx
reader.close()
def compute_page_range(self, reader, query):
# Get End
end_iter = search(reader, query.end_key, prev_size=1)
try:
end_line = end_iter.next()
except StopIteration:
end_line = read_last_line(reader)
# Get Start
first_iter = iter_range(reader,
query.key,
query.end_key,
prev_size=1)
try:
first_line = first_iter.next()
except StopIteration:
reader.close()
raise
first = IDXObject(first_line)
end = IDXObject(end_line)
diff = end['lineno'] - first['lineno']
pagesize = query.page_size
if not pagesize:
pagesize = self.max_blocks
total_pages = diff / pagesize + 1
if query.page_count:
info = dict(pages=total_pages,
pageSize=pagesize,
blocks=diff + 1)
yield json.dumps(info)
reader.close()
return
curr_page = query.page
if curr_page >= total_pages or curr_page < 0:
msg = 'Page {0} invalid: First Page is 0, Last Page is {1}'
reader.close()
raise CDXException(msg.format(curr_page, total_pages - 1))
startline = curr_page * pagesize
endline = min(startline + pagesize - 1, diff)
if curr_page == 0:
yield first_line
else:
startline -= 1
idxiter = itertools.islice(first_iter, startline, endline)
for idx in idxiter:
yield idx
reader.close()
def _do_load_file(filename, query):
with open(filename, 'rb') as source:
gen = iter_range(source, query.key, query.end_key)
for line in gen:
yield line
def do_open():
with open(self.filename, 'rb') as source:
gen = iter_range(source, query.key, query.end_key)
for line in gen:
yield line
def load_cdx(self, query):
source = open(self.filename)
return iter_range(source, query.key, query.end_key)
