diff options
Diffstat (limited to 'realtime/rt')
| -rw-r--r-- | realtime/rt/rt.py | 64 |
1 files changed, 57 insertions, 7 deletions
diff --git a/realtime/rt/rt.py b/realtime/rt/rt.py index 27eeb3ca..70ed0c3c 100644 --- a/realtime/rt/rt.py +++ b/realtime/rt/rt.py @@ -5,6 +5,7 @@ import collections import logging import os import shutil +import signal import StringIO import subprocess import sys @@ -25,6 +26,54 @@ TRUE = ('true', 'True', 'TRUE') logger = logging.getLogger('rt') +class ExtractorWrapper: + '''Wrap cdec.sa.GrammarExtractor. Used to keep multiple instances of the extractor from causing Python to segfault. + Do not use directly unless you know what you're doing.''' + + def __init__(self, config): + # Make sure pycdec is on PYTHONPATH + cdec_root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) + pycdec = os.path.join(cdec_root, 'python') + env = os.environ.copy() + python_path = env.get('PYTHONPATH', '') + if 'cdec/python' not in python_path: + python_path = '{}:{}'.format(python_path, pycdec) if len(python_path) > 0 else pycdec + env['PYTHONPATH'] = python_path + # Start grammar extractor as separate process using stdio + cmd = ['python', '-m', 'cdec.sa.extract', '-o', '-z', '-c', config, '-t'] + logger.info('Executing: {}'.format(' '.join(cmd))) + self.p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env) + util.consume_stream(self.p.stderr) + self.lock = util.FIFOLock() + + def close(self, force=False): + if not force: + self.lock.acquire() + self.p.stdin.close() + self.p.wait() + self.lock.release() + else: + os.kill(self.p.pid, signal.SIGTERM) + + + def drop_ctx(self, ctx_name): + self.lock.acquire() + self.p.stdin.write('{} ||| drop\n'.format(ctx_name)) + self.p.stdout.readline() + self.lock.release() + + def grammar(self, sentence, grammar_file, ctx_name): + self.lock.acquire() + self.p.stdin.write('{} ||| {} ||| {}\n'.format(ctx_name, sentence, grammar_file)) + self.p.stdout.readline() + self.lock.release() + + def add_instance(self, source, target, alignment, ctx_name): + self.lock.acquire() + self.p.stdin.write('{} ||| {} ||| {} ||| {}\n'.format(ctx_name, source, target, alignment)) + self.p.stdout.readline() + self.lock.release() + class RealtimeDecoder: '''Do not use directly unless you know what you're doing. Use RealtimeTranslator.''' @@ -111,7 +160,7 @@ class RealtimeTranslator: sa_config.filename = os.path.join(self.tmp, 'sa.ini') util.sa_ini_for_realtime(sa_config, os.path.abspath(configdir)) sa_config.write() - self.extractor = cdec.sa.GrammarExtractor(sa_config.filename, online=True) + self.extractor = ExtractorWrapper(sa_config.filename) self.cache_size = cache_size ### One instance per context @@ -142,10 +191,13 @@ class RealtimeTranslator: '''Cleanup''' if force: logger.info('Forced shutdown: stopping immediately') - for ctx_name in list(self.ctx_names): - self.drop_ctx(ctx_name, force) + # Drop contexts before closing processes unless forced + if not force: + for ctx_name in list(self.ctx_names): + self.drop_ctx(ctx_name, force) logger.info('Closing processes') self.aligner.close(force) + self.extractor.close(force) if self.norm: if not force: self.tokenizer_lock.acquire() @@ -213,11 +265,9 @@ class RealtimeTranslator: self.extractor_lock.release() return grammar_file # Extract and cache - (fid, grammar_file) = tempfile.mkstemp(dir=self.decoders[ctx_name].tmp, prefix='grammar.') + (fid, grammar_file) = tempfile.mkstemp(dir=self.decoders[ctx_name].tmp, prefix='grammar.', suffix='.gz') os.close(fid) - with open(grammar_file, 'w') as output: - for rule in self.extractor.grammar(sentence, ctx_name): - output.write('{}\n'.format(str(rule))) + self.extractor.grammar(sentence, grammar_file, ctx_name) grammar_files = self.grammar_files[ctx_name] if len(grammar_files) == self.cache_size: rm_sent = grammar_files.popleft() |