# ====================================================================
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ====================================================================
import os
from bsddb.db import DBEnv,DB
from bsddb.db import \
DB_INIT_MPOOL, DB_INIT_LOCK, DB_INIT_TXN, DB_THREAD, DB_BTREE
# missing from python interface at the moment
DB_LOG_INMEMORY = 0x00020000
from lucene import DbDirectory,IndexSearcher,Term,TermQuery
class BerkeleyDbSearcher(object):
def main(cls, argv):
if len(argv) != 2:
print "Usage: BerkeleyDbSearcher <index dir>"
return
dbHome = argv[1]
env = DBEnv()
env.set_flags(DB_LOG_INMEMORY, 1);
if os.name == 'nt':
env.set_cachesize(0, 0x4000000, 1)
elif os.name == 'posix':
from commands import getstatusoutput
if getstatusoutput('uname') == (0, 'Linux'):
env.set_cachesize(0, 0x4000000, 1)
env.open(dbHome, (DB_THREAD |
DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN), 0)
index = DB(env)
blocks = DB(env)
txn = None
try:
txn = env.txn_begin(None)
index.open(filename = '__index__', dbtype = DB_BTREE,
flags = DB_THREAD, txn = txn)
blocks.open(filename = '__blocks__', dbtype = DB_BTREE,
flags = DB_THREAD, txn = txn)
except:
if txn is not None:
txn.abort()
txn = None
raise
else:
txn.commit()
txn = None
try:
txn = env.txn_begin(None)
directory = DbDirectory(txn, index, blocks, 0)
searcher = IndexSearcher(directory, True)
topDocs = searcher.search(TermQuery(Term("contents", "fox")), 50)
print topDocs.totalHits, "document(s) found"
searcher.close()
except:
if txn is not None:
txn.abort()
txn = None
raise
else:
txn.abort()
index.close()
blocks.close()
env.close()
main = classmethod(main)
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