Python polling.PollingObserver类代码示例

 def watch(self):
     observer = PollingObserver(0.1)
     observer.schedule(self, self.path)
     observer.start()
     self.file = open(self.path + "\Power.log", "r")
     self.on_modified(None)
     self.watching = True

def watch(directory=None, auto_clear=False, beep_on_failure=True,
          onpass=None, onfail=None, poll=False, extensions=[]):
    """
    Starts a server to render the specified file or directory
    containing a README.
    """
    if directory and not os.path.isdir(directory):
        raise ValueError('Directory not found: ' + directory)
    directory = os.path.abspath(directory or '')

    # Initial run
    event_handler = ChangeHandler(directory, auto_clear, beep_on_failure,
                                  onpass, onfail, extensions)
    event_handler.run()

    # Setup watchdog
    if poll:
        observer = PollingObserver()
    else:
        observer = Observer()

    observer.schedule(event_handler, path=directory, recursive=True)
    observer.start()

    # Watch and run tests until interrupted by user
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()
    observer.join()

def get_contracts_code_observer(project_dir):
    observer = PollingObserver()

    build_path = utils.get_build_dir(project_dir)
    event_handler = ContractCodeChangedEventHandler(project_dir=project_dir)
    observer.schedule(event_handler, build_path, recursive=False)

    return observer

def watch_server(root_dir):
    # create event handler
    event_handler = OneDirServerEventHandler()
    # create observer
    observer = PollingObserver()

    # observe the given directory recursively
    observer.schedule(event_handler, path=root_dir, recursive=True)
    return observer

def get_active_dir_observer(project_dir, event_handler):
    """ Setup a polling observer on the project's
        blockchains directory. This directory contains the
        .active-chain symlink which is watched for.
    """
    bchain = get_blockchains_dir(project_dir)
    observer = PollingObserver()
    observer.schedule(event_handler, bchain, recursive=False)
    return observer

class Watcher:
    def __init__(self):
#       self.observer = Observer()            # Use this if SS_DIR is local
        self.observer = PollingObserver()     # Use this if SS_DIR is remote mount

    def run(self):
        event_handler = file_changed()
        self.observer.schedule(event_handler, SS_DIR, recursive=True)
        self.observer.start()
        loop1()

    def __init__(self, basedir='.', polling=False):
        """Initialize the Monitor."""
        if not polling:
            self.observer = Observer()
        else:
            self.observer = PollingObserver()

        self.handlers = []
        self.basedir = basedir
        self.running = False

def watch_record(indexer, use_polling=False):
    """
    Start watching `cfstore.record_path`.

    :type indexer: rash.indexer.Indexer

    """
    if use_polling:
        from watchdog.observers.polling import PollingObserver as Observer

        Observer  # fool pyflakes
    else:
        from watchdog.observers import Observer

    event_handler = RecordHandler(indexer)
    observer = Observer()
    observer.schedule(event_handler, path=indexer.record_path, recursive=True)
    indexer.logger.debug("Start observer.")
    observer.start()
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        indexer.logger.debug("Got KeyboardInterrupt. Stopping observer.")
        observer.stop()
    indexer.logger.debug("Joining observer.")
    observer.join()
    indexer.logger.debug("Finish watching record.")

    def watch(self):
        """
        Start watching
        """
        logger.info('Watching directory %s' % self.directory)

        # Set up handler for when we see new files
        callback = self.callback
        class NewFileEventHandler(FileSystemEventHandler):
            def on_created(self, event):
                if not event.is_directory:
                    logger.info('Detected new file: %s' % event.src_path)
                    callback(event.src_path)
        event_handler = NewFileEventHandler()

        # Use polling observer (rather than filesystem-specific observers),
        # because it is more reliable.
        observer = PollingObserver(timeout=self.sleep_time)

        # Start the observer
        observer.schedule(event_handler, self.directory, recursive=False)
        observer.start()

        # Wait while the observer is running
        try:
            while True:
                sleep(self.sleep_time)
        # Exit gracefully
        except KeyboardInterrupt:
            logger.info('Detected interrupt. Stopping observer.')
            observer.stop()
        observer.join()

class SuiteTable(object):
    def __init__(self, dbfile=":memory:", poll=False):
        self.db = sqlite3.connect(dbfile, check_same_thread=False)
        self.log = logging.getLogger(__name__)
        self._create_db()

        # set up watchdog observer to monitor changes to
        # keyword files (or more correctly, to directories
        # of keyword files)
        self.observer =  PollingObserver() if poll else Observer()
        self.observer.start()

    def _create_db(self):

        if not self._table_exists("collection_table"):
            self.db.execute("""
                CREATE TABLE collection_table
                (collection_id INTEGER PRIMARY KEY AUTOINCREMENT,
                 name          TEXT COLLATE NOCASE,
                 type          COLLATE NOCASE,
                 version       TEXT,
                 scope         TEXT,
                 namedargs     TEXT,
                 path          TEXT,
                 doc           TEXT,
                 doc_format    TEXT)
            """)
            self.db.execute("""
                CREATE INDEX collection_index
                ON collection_table (name)
            """)

        if not self._table_exists("keyword_table"):
            self.db.execute("""
                CREATE TABLE keyword_table
                (keyword_id    INTEGER PRIMARY KEY AUTOINCREMENT,
                 name          TEXT COLLATE NOCASE,
                 collection_id INTEGER,
                 doc           TEXT,
                 args          TEXT)
            """)
            self.db.execute("""
                CREATE INDEX keyword_index
                ON keyword_table (name)
            """)

    def _table_exists(self, name):
        cursor = self.db.execute("""
            SELECT name FROM sqlite_master
            WHERE type='table' AND name='%s'
        """ % name)
        return len(cursor.fetchall()) > 0

def get_static_assets_observer(project_dir):
    build_path = utils.get_build_dir(project_dir)

    observer = PollingObserver()

    contracts_js_event_handler = ContractsJSChangedEventHandler(project_dir=project_dir)
    observer.schedule(contracts_js_event_handler, build_path, recursive=False)

    if project_has_assets(project_dir):
        assets_watch_path = get_static_assets_dir(project_dir)
        assets_event_handler = AssetsChangedEventHandler(project_dir=project_dir)
        observer.schedule(assets_event_handler, assets_watch_path, recursive=True)

    return observer

def get_contracts_observer(project_dir, contract_filters=None, compiler_kwargs=None):
    if contract_filters is None:
        contract_filters = []
    if compiler_kwargs is None:
        compiler_kwargs = {}
    contracts_dir = utils.get_contracts_dir(project_dir)
    libraries_dir = get_project_libraries_dir(project_dir)

    event_handler = ContractSourceChangedEventHandler(
        project_dir=project_dir, contract_filters=contract_filters, compiler_kwargs=compiler_kwargs
    )
    observer = PollingObserver()
    observer.schedule(event_handler, contracts_dir, recursive=True)
    observer.schedule(event_handler, libraries_dir, recursive=True)
    return observer

    def watch(self):
        observer = PollingObserver()
        observer.schedule(self.pickup_event_processor, path=self.pickup_dir)
        observer.start()
        
        try:
            while self.keep_running:
                sleep(3)
        except KeyboardInterrupt:
            observer.stop()

        observer.join()

def main():
    """Script entry point."""
    from watchdog.observers.polling import PollingObserver
    from .parser import AAConfigParser
    from .tricks import AutoRunTrick

    parser = _create_main_argparser()
    args = parser.parse_args()
    configm = _apply_main_args(args)

    # The reason to use PollingObserver() is it's os-independent. And it's
    # more reliable.
    observer = PollingObserver()

    parser = AAConfigParser(configm)
    handler_for_watch = parser.schedule_with(observer, AutoRunTrick)
    handlers = set.union(*tuple(handler_for_watch.values()))

    for handler in handlers:
        handler.start()
    observer.start()
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()
    observer.join()
    for handler in handlers:
        handler.stop()

def watch_assets(options):
    """
    Watch for changes to asset files, and regenerate js/css
    """
    # Don't watch assets when performing a dry run
    if tasks.environment.dry_run:
        return

    observer = PollingObserver()

    CoffeeScriptWatcher().register(observer)
    SassWatcher().register(observer)
    XModuleSassWatcher().register(observer)
    XModuleAssetsWatcher().register(observer)

    print("Starting asset watcher...")
    observer.start()
    if not getattr(options, 'background', False):
        # when running as a separate process, the main thread needs to loop
        # in order to allow for shutdown by contrl-c
        try:
            while True:
                observer.join(2)
        except KeyboardInterrupt:
            observer.stop()
        print("\nStopped asset watcher.")