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"""Package defining master and slave threads |
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.. Authors: |
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Philippe Dessauw |
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[email protected] |
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.. Sponsor: |
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Alden Dima |
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[email protected] |
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Information Systems Group |
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Software and Systems Division |
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Information Technology Laboratory |
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National Institute of Standards and Technology |
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http://www.nist.gov/itl/ssd/is |
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""" |
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import logging |
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from os import listdir, getpid, remove |
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from os.path import join, exists, split |
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from socket import gethostbyname, gethostname |
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from time import sleep |
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from shutil import move |
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from pipeline.files import FileManager |
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from pipeline.threads import StoppableThread |
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from pipeline.utils import create_data_directory |
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from pipeline.logger import AppLogger, LogWriter |
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from pipeline.queue import QueueManager, CommandQueueItem |
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class Master(StoppableThread): |
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""" Master worker |
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""" |
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def __init__(self, app_config): |
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StoppableThread.__init__(self) |
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# ip = app_config["machines"]["master"][0].split('@') |
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# master_ip = ip[-1:][0] |
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redis_ip = app_config["redis"]["host"] |
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redis_port = app_config["redis"]["port"] |
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self.logger = AppLogger("master", logging.getLogger("local"), redis_ip, redis_port) |
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self.log_writer = LogWriter(logging.getLogger("app"), redis_ip, redis_port) |
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self.command_queue = QueueManager(host=redis_ip, port=redis_port, qname="commands") |
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self.finished_queue = QueueManager(host=redis_ip, port=redis_port, qname="finished") |
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# self.fman = FileManager(master_ip, master_queue_port) |
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self.fman = FileManager(app_config) |
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self.config = app_config |
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self.input = app_config["dirs"]["input"] |
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self.output = app_config["dirs"]["output"] |
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def run(self): |
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self.log_writer.start() |
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self.logger.info("Starting master...") |
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# processed_filenames = [] |
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while not self.is_stopped(): |
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self.logger.info("Reading input directory...") |
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# filenames = [f for f in listdir(self.input) if f not in processed_filenames] |
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filenames = listdir(self.input) |
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if len(filenames) > 0: |
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self.logger.info(str(len(filenames)) + " file(s) to put in the queue") |
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for filename in filenames: |
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self.logger.debug("Processing %s..." % filename) |
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full_filename = join(self.input, filename) |
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dirname = create_data_directory(full_filename, self.config["dirs"]["temp"]) |
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self.logger.debug("%s has been created." % dirname) |
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if dirname is not None: |
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# archive = zip_directory(dirname) |
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# self.fman.store_file(archive) |
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self.command_queue.push(CommandQueueItem(filename=dirname, logger=self.logger, |
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config=self.config)) |
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# processed_filenames.append(filename) |
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self.logger.info("Incoming files have been put in the queue") |
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if len(self.finished_queue) > 0: |
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self.logger.info("Finished queue not empty") |
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while not self.finished_queue.is_empty(): |
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filename = self.finished_queue.pop() |
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# self.fman.retrieve_file(filename) |
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output_file_path = join(self.config["dirs"]["output"], split(filename)[1]) |
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if exists(output_file_path): |
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remove(output_file_path) |
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move(filename, self.config["dirs"]["output"]) |
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# self.fman.delete_file(filename) |
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self.logger.info("No more finished job to process") |
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sleep(60) # Avoid CPU consuption while waiting |
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def stop(self): |
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self.logger.info("Master stopped") |
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self.log_writer.stop() |
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StoppableThread.stop(self) |
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class Slave(StoppableThread): |
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""" Slave worker |
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""" |
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def __init__(self, app_config): |
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StoppableThread.__init__(self) |
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self.config = app_config |
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# ip = app_config["machines"]["master"][0].split('@') |
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# master_ip = ip[-1:][0] |
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redis_ip = app_config["redis"]["host"] |
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redis_port = app_config["redis"]["port"] |
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self.command_queue = QueueManager(host=redis_ip, port=redis_port, qname="commands") |
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self.finished_queue = QueueManager(host=redis_ip, port=redis_port, qname="finished") |
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# self.fman = FileManager(master_ip, master_queue_port) |
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slave_ip = gethostbyname(gethostname()) |
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slave_pid = getpid() |
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uid = slave_ip + "::" + str(slave_pid) |
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self.logger = AppLogger(uid, logging.getLogger("local"), redis_ip, redis_port) |
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self.max_tries = app_config["commands"]["tries"] |
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self.logger.info("Slave initiated [redis on "+redis_ip+"]") |
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def run(self): |
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self.logger.info("Starting slave...") |
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while not self.is_stopped(): |
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if not self.command_queue.is_empty(): |
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cmd_json = self.command_queue.pop() |
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cmd = CommandQueueItem(jsondata=cmd_json, logger=self.logger, config=self.config) |
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status = cmd.execute() |
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# Job returned an error and has reached the limit of tries |
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if status == 1 and cmd.tries >= self.max_tries: |
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self.logger.error("Error when processing command") |
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continue |
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if cmd.current_step == -1: |
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self.logger.info("Pushing to finished queue") |
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self.finished_queue.push(cmd.filename) |
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self.logger.info("Job done") |
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continue |
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self.command_queue.push(cmd) |
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sleep(1) # Avoid CPU consumption while waiting |
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def stop(self): |
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self.logger.info("Slave stopped") |
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StoppableThread.stop(self) |
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usnistgov /
ocr-pipeline
