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807 lines
26 KiB
Python
807 lines
26 KiB
Python
# Copyright 2017, David Wilson
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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"""
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This module implements functionality required by master processes, such as
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starting new contexts via SSH. Its size is also restricted, since it must
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be sent to any context that will be used to establish additional child
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contexts.
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"""
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import dis
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import imp
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import inspect
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import itertools
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import logging
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import os
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import pkgutil
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import re
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import string
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import sys
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import threading
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import types
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import zlib
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if not hasattr(pkgutil, 'find_loader'):
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# find_loader() was new in >=2.5, but the modern pkgutil.py syntax has
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# been kept intentionally 2.3 compatible so we can reuse it.
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from mitogen.compat import pkgutil
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import mitogen
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import mitogen.core
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import mitogen.minify
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import mitogen.parent
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from mitogen.core import b
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from mitogen.core import to_text
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from mitogen.core import LOG
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from mitogen.core import IOLOG
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imap = getattr(itertools, 'imap', map)
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izip = getattr(itertools, 'izip', zip)
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RLOG = logging.getLogger('mitogen.ctx')
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def _stdlib_paths():
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"""Return a set of paths from which Python imports the standard library.
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"""
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attr_candidates = [
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'prefix',
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'real_prefix', # virtualenv: only set inside a virtual environment.
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'base_prefix', # venv: always set, equal to prefix if outside.
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]
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prefixes = (getattr(sys, a) for a in attr_candidates if hasattr(sys, a))
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version = 'python%s.%s' % sys.version_info[0:2]
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return set(os.path.abspath(os.path.join(p, 'lib', version))
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for p in prefixes)
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def get_child_modules(path):
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"""Return the suffixes of submodules directly neated beneath of the package
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directory at `path`.
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:param str path:
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Path to the module's source code on disk, or some PEP-302-recognized
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equivalent. Usually this is the module's ``__file__`` attribute, but
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is specified explicitly to avoid loading the module.
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:return:
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List of submodule name suffixes.
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"""
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it = pkgutil.iter_modules([os.path.dirname(path)])
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return [to_text(name) for _, name, _ in it]
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def get_core_source():
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"""
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Master version of parent.get_core_source().
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"""
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source = inspect.getsource(mitogen.core)
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return mitogen.minify.minimize_source(source)
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if mitogen.is_master:
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# TODO: find a less surprising way of installing this.
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mitogen.parent.get_core_source = get_core_source
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LOAD_CONST = dis.opname.index('LOAD_CONST')
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IMPORT_NAME = dis.opname.index('IMPORT_NAME')
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if sys.version_info < (3, 0):
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def iter_opcodes(co):
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# Yield `(op, oparg)` tuples from the code object `co`.
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ordit = imap(ord, co.co_code)
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nextb = ordit.next
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return ((c, (None
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if c < dis.HAVE_ARGUMENT else
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(nextb() | (nextb() << 8))))
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for c in ordit)
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elif sys.version_info < (3, 6):
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def iter_opcodes(co):
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# Yield `(op, oparg)` tuples from the code object `co`.
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ordit = iter(co.co_code)
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nextb = ordit.__next__
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return ((c, (None
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if c < dis.HAVE_ARGUMENT else
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(nextb() | (nextb() << 8))))
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for c in ordit)
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else:
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def iter_opcodes(co):
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# Yield `(op, oparg)` tuples from the code object `co`.
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ordit = iter(co.co_code)
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nextb = ordit.__next__
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# https://github.com/abarnert/cpython/blob/c095a32f/Python/wordcode.md
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return ((c, nextb()) for c in ordit)
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def scan_code_imports(co):
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"""Given a code object `co`, scan its bytecode yielding any
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``IMPORT_NAME`` and associated prior ``LOAD_CONST`` instructions
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representing an `Import` statement or `ImportFrom` statement.
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:return:
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Generator producing `(level, modname, namelist)` tuples, where:
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* `level`: -1 for normal import, 0, for absolute import, and >0 for
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relative import.
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* `modname`: Name of module to import, or from where `namelist` names
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are imported.
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* `namelist`: for `ImportFrom`, the list of names to be imported from
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`modname`.
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"""
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opit = iter_opcodes(co)
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opit, opit2, opit3 = itertools.tee(opit, 3)
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try:
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next(opit2)
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next(opit3)
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next(opit3)
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except StopIteration:
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return
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for oparg1, oparg2, (op3, arg3) in izip(opit, opit2, opit3):
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if op3 == IMPORT_NAME:
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op2, arg2 = oparg2
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op1, arg1 = oparg1
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if op1 == op2 == LOAD_CONST:
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yield (co.co_consts[arg1],
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co.co_names[arg3],
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co.co_consts[arg2] or ())
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class ThreadWatcher(object):
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"""
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Manage threads that waits for nother threads to shutdown, before invoking
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`on_join()`. In CPython it seems possible to use this method to ensure a
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non-main thread is signalled when the main thread has exitted, using yet
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another thread as a proxy.
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"""
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_lock = threading.Lock()
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_pid = None
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_instances_by_target = {}
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_thread_by_target = {}
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@classmethod
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def _reset(cls):
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"""If we have forked since the watch dictionaries were initialized, all
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that has is garbage, so clear it."""
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if os.getpid() != cls._pid:
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cls._pid = os.getpid()
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cls._instances_by_target.clear()
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cls._thread_by_target.clear()
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def __init__(self, target, on_join):
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self.target = target
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self.on_join = on_join
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@classmethod
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def _watch(cls, target):
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target.join()
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for watcher in cls._instances_by_target[target]:
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watcher.on_join()
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def install(self):
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self._lock.acquire()
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try:
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self._reset()
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self._instances_by_target.setdefault(self.target, []).append(self)
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if self.target not in self._thread_by_target:
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self._thread_by_target[self.target] = threading.Thread(
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name='mitogen.master.join_thread_async',
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target=self._watch,
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args=(self.target,)
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)
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self._thread_by_target[self.target].start()
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finally:
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self._lock.release()
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def remove(self):
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self._lock.acquire()
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try:
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self._reset()
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lst = self._instances_by_target.get(self.target, [])
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if self in lst:
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lst.remove(self)
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finally:
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self._lock.release()
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@classmethod
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def watch(cls, target, on_join):
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watcher = cls(target, on_join)
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watcher.install()
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return watcher
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class LogForwarder(object):
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def __init__(self, router):
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self._router = router
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self._cache = {}
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router.add_handler(
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fn=self._on_forward_log,
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handle=mitogen.core.FORWARD_LOG,
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)
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def _on_forward_log(self, msg):
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if msg.is_dead:
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return
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logger = self._cache.get(msg.src_id)
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if logger is None:
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context = self._router.context_by_id(msg.src_id)
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if context is None:
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LOG.error('FORWARD_LOG received from src_id %d', msg.src_id)
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return
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name = '%s.%s' % (RLOG.name, context.name)
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self._cache[msg.src_id] = logger = logging.getLogger(name)
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name, level_s, s = msg.data.decode('latin1').split('\x00', 2)
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logger.log(int(level_s), '%s: %s', name, s, extra={
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'mitogen_message': s,
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'mitogen_context': self._router.context_by_id(msg.src_id),
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'mitogen_name': name,
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})
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def __repr__(self):
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return 'LogForwarder(%r)' % (self._router,)
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_STDLIB_PATHS = _stdlib_paths()
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def is_stdlib_path(path):
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return any(
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os.path.commonprefix((libpath, path)) == libpath
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and 'site-packages' not in path
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and 'dist-packages' not in path
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for libpath in _STDLIB_PATHS
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)
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def is_stdlib_name(modname):
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"""Return :data:`True` if `modname` appears to come from the standard
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library."""
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if imp.is_builtin(modname) != 0:
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return True
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module = sys.modules.get(modname)
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if module is None:
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return False
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# six installs crap with no __file__
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modpath = os.path.abspath(getattr(module, '__file__', ''))
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return is_stdlib_path(modpath)
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class ModuleFinder(object):
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def __init__(self):
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#: Import machinery is expensive, keep :py:meth`:get_module_source`
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#: results around.
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self._found_cache = {}
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#: Avoid repeated dependency scanning, which is expensive.
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self._related_cache = {}
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def __repr__(self):
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return 'ModuleFinder()'
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def _looks_like_script(self, path):
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"""
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Return :data:`True` if the (possibly extensionless) file at `path`
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resembles a Python script. For now we simply verify the file contains
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ASCII text.
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"""
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fp = open(path, 'rb')
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try:
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sample = fp.read(512).decode('latin-1')
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return not set(sample).difference(string.printable)
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finally:
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fp.close()
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def _py_filename(self, path):
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if not path:
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return None
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if path[-4:] in ('.pyc', '.pyo'):
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path = path.rstrip('co')
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if path.endswith('.py'):
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return path
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if os.path.exists(path) and self._looks_like_script(path):
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return path
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def _get_module_via_pkgutil(self, fullname):
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"""Attempt to fetch source code via pkgutil. In an ideal world, this
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would be the only required implementation of get_module()."""
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try:
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# Pre-'import spec' this returned None, in Python3.6 it raises
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# ImportError.
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loader = pkgutil.find_loader(fullname)
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except ImportError:
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e = sys.exc_info()[1]
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LOG.debug('%r._get_module_via_pkgutil(%r): %s',
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self, fullname, e)
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return None
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IOLOG.debug('%r._get_module_via_pkgutil(%r) -> %r',
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self, fullname, loader)
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if not loader:
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return
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try:
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path = self._py_filename(loader.get_filename(fullname))
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source = loader.get_source(fullname)
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is_pkg = loader.is_package(fullname)
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except (AttributeError, ImportError):
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# - Per PEP-302, get_source() and is_package() are optional,
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# calling them may throw AttributeError.
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# - get_filename() may throw ImportError if pkgutil.find_loader()
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# picks a "parent" package's loader for some crap that's been
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# stuffed in sys.modules, for example in the case of urllib3:
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# "loader for urllib3.contrib.pyopenssl cannot handle
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# requests.packages.urllib3.contrib.pyopenssl"
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e = sys.exc_info()[1]
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LOG.debug('%r: loading %r using %r failed: %s',
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self, fullname, loader)
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return
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if path is None or source is None:
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return
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if isinstance(source, mitogen.core.UnicodeType):
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# get_source() returns "string" according to PEP-302, which was
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# reinterpreted for Python 3 to mean a Unicode string.
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source = source.encode('utf-8')
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return path, source, is_pkg
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def _get_module_via_sys_modules(self, fullname):
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"""Attempt to fetch source code via sys.modules. This is specifically
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to support __main__, but it may catch a few more cases."""
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module = sys.modules.get(fullname)
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LOG.debug('_get_module_via_sys_modules(%r) -> %r', fullname, module)
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if not isinstance(module, types.ModuleType):
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LOG.debug('sys.modules[%r] absent or not a regular module',
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fullname)
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return
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path = self._py_filename(getattr(module, '__file__', ''))
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if not path:
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return
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is_pkg = hasattr(module, '__path__')
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try:
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source = inspect.getsource(module)
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except IOError:
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# Work around inspect.getsourcelines() bug for 0-byte __init__.py
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# files.
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if not is_pkg:
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raise
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source = '\n'
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if isinstance(source, mitogen.core.UnicodeType):
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# get_source() returns "string" according to PEP-302, which was
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# reinterpreted for Python 3 to mean a Unicode string.
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source = source.encode('utf-8')
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return path, source, is_pkg
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get_module_methods = [_get_module_via_pkgutil,
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_get_module_via_sys_modules]
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def get_module_source(self, fullname):
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"""Given the name of a loaded module `fullname`, attempt to find its
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source code.
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:returns:
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Tuple of `(module path, source text, is package?)`, or :data:`None`
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if the source cannot be found.
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"""
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tup = self._found_cache.get(fullname)
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if tup:
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return tup
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for method in self.get_module_methods:
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tup = method(self, fullname)
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if tup:
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break
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else:
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tup = None, None, None
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LOG.debug('get_module_source(%r): cannot find source', fullname)
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self._found_cache[fullname] = tup
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return tup
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def resolve_relpath(self, fullname, level):
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"""Given an ImportFrom AST node, guess the prefix that should be tacked
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on to an alias name to produce a canonical name. `fullname` is the name
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of the module in which the ImportFrom appears."""
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mod = sys.modules.get(fullname, None)
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if hasattr(mod, '__path__'):
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fullname += '.__init__'
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if level == 0 or not fullname:
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return ''
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bits = fullname.split('.')
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if len(bits) <= level:
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# This would be an ImportError in real code.
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return ''
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return '.'.join(bits[:-level]) + '.'
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def generate_parent_names(self, fullname):
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while '.' in fullname:
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fullname, _, _ = fullname.rpartition('.')
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yield fullname
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def find_related_imports(self, fullname):
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"""
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Return a list of non-stdlb modules that are directly imported by
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`fullname`, plus their parents.
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The list is determined by retrieving the source code of
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`fullname`, compiling it, and examining all IMPORT_NAME ops.
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:param fullname: Fully qualified name of an _already imported_ module
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for which source code can be retrieved
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:type fullname: str
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"""
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related = self._related_cache.get(fullname)
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if related is not None:
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return related
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modpath, src, _ = self.get_module_source(fullname)
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if src is None:
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return []
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maybe_names = list(self.generate_parent_names(fullname))
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co = compile(src, modpath, 'exec')
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for level, modname, namelist in scan_code_imports(co):
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if level == -1:
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modnames = [modname, '%s.%s' % (fullname, modname)]
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else:
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modnames = [
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'%s%s' % (self.resolve_relpath(fullname, level), modname)
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]
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maybe_names.extend(modnames)
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maybe_names.extend(
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'%s.%s' % (mname, name)
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for mname in modnames
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for name in namelist
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)
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return self._related_cache.setdefault(fullname, sorted(
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set(
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name
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for name in maybe_names
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if sys.modules.get(name) is not None
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and not is_stdlib_name(name)
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and u'six.moves' not in name # TODO: crap
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)
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))
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def find_related(self, fullname):
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"""
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Return a list of non-stdlib modules that are imported directly or
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indirectly by `fullname`, plus their parents.
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This method is like :py:meth:`on_disconect`, but it also recursively
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searches any modules which are imported by `fullname`.
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:param fullname: Fully qualified name of an _already imported_ module
|
|
for which source code can be retrieved
|
|
:type fullname: str
|
|
"""
|
|
stack = [fullname]
|
|
found = set()
|
|
|
|
while stack:
|
|
name = stack.pop(0)
|
|
names = self.find_related_imports(name)
|
|
stack.extend(set(names).difference(found, stack))
|
|
found.update(names)
|
|
|
|
found.discard(fullname)
|
|
return sorted(found)
|
|
|
|
|
|
class ModuleResponder(object):
|
|
def __init__(self, router):
|
|
self._router = router
|
|
self._finder = ModuleFinder()
|
|
self._cache = {} # fullname -> pickled
|
|
self.blacklist = []
|
|
self.whitelist = ['']
|
|
router.add_handler(
|
|
fn=self._on_get_module,
|
|
handle=mitogen.core.GET_MODULE,
|
|
)
|
|
|
|
def __repr__(self):
|
|
return 'ModuleResponder(%r)' % (self._router,)
|
|
|
|
MAIN_RE = re.compile(b(r'^if\s+__name__\s*==\s*.__main__.\s*:'), re.M)
|
|
|
|
def whitelist_prefix(self, fullname):
|
|
if self.whitelist == ['']:
|
|
self.whitelist = ['mitogen']
|
|
self.whitelist.append(fullname)
|
|
|
|
def blacklist_prefix(self, fullname):
|
|
self.blacklist.append(fullname)
|
|
|
|
def neutralize_main(self, src):
|
|
"""Given the source for the __main__ module, try to find where it
|
|
begins conditional execution based on a "if __name__ == '__main__'"
|
|
guard, and remove any code after that point."""
|
|
match = self.MAIN_RE.search(src)
|
|
if match:
|
|
return src[:match.start()]
|
|
return src
|
|
|
|
def _make_negative_response(self, fullname):
|
|
return (fullname, None, None, None, ())
|
|
|
|
def _build_tuple(self, fullname):
|
|
if mitogen.core.is_blacklisted_import(self, fullname):
|
|
raise ImportError('blacklisted')
|
|
|
|
if fullname in self._cache:
|
|
return self._cache[fullname]
|
|
|
|
path, source, is_pkg = self._finder.get_module_source(fullname)
|
|
if source is None:
|
|
LOG.error('_build_tuple(%r): could not locate source', fullname)
|
|
tup = self._make_negative_response(fullname)
|
|
self._cache[fullname] = tup
|
|
return tup
|
|
|
|
if is_pkg:
|
|
pkg_present = get_child_modules(path)
|
|
LOG.debug('_build_tuple(%r, %r) -> %r',
|
|
path, fullname, pkg_present)
|
|
else:
|
|
pkg_present = None
|
|
|
|
if fullname == '__main__':
|
|
source = self.neutralize_main(source)
|
|
compressed = mitogen.core.Blob(zlib.compress(source, 9))
|
|
related = [
|
|
to_text(name)
|
|
for name in self._finder.find_related(fullname)
|
|
if not mitogen.core.is_blacklisted_import(self, name)
|
|
]
|
|
# 0:fullname 1:pkg_present 2:path 3:compressed 4:related
|
|
tup = (
|
|
to_text(fullname),
|
|
pkg_present,
|
|
to_text(path),
|
|
compressed,
|
|
related
|
|
)
|
|
self._cache[fullname] = tup
|
|
return tup
|
|
|
|
def _send_load_module(self, stream, fullname):
|
|
if fullname not in stream.sent_modules:
|
|
LOG.debug('_send_load_module(%r, %r)', stream, fullname)
|
|
self._router._async_route(
|
|
mitogen.core.Message.pickled(
|
|
self._build_tuple(fullname),
|
|
dst_id=stream.remote_id,
|
|
handle=mitogen.core.LOAD_MODULE,
|
|
)
|
|
)
|
|
stream.sent_modules.add(fullname)
|
|
|
|
def _send_module_load_failed(self, stream, fullname):
|
|
stream.send(
|
|
mitogen.core.Message.pickled(
|
|
(fullname, None, None, None, ()),
|
|
dst_id=stream.remote_id,
|
|
handle=mitogen.core.LOAD_MODULE,
|
|
)
|
|
)
|
|
|
|
def _send_module_and_related(self, stream, fullname):
|
|
try:
|
|
tup = self._build_tuple(fullname)
|
|
if tup[2] and is_stdlib_path(tup[2]):
|
|
# Prevent loading of 2.x<->3.x stdlib modules! This costs one
|
|
# RTT per hit, so a client-side solution is also required.
|
|
LOG.warning('%r: refusing to serve stdlib module %r',
|
|
self, fullname)
|
|
self._send_module_load_failed(stream, fullname)
|
|
return
|
|
|
|
for name in tup[4]: # related
|
|
parent, _, _ = name.partition('.')
|
|
if parent != fullname and parent not in stream.sent_modules:
|
|
# Parent hasn't been sent, so don't load submodule yet.
|
|
continue
|
|
|
|
self._send_load_module(stream, name)
|
|
self._send_load_module(stream, fullname)
|
|
except Exception:
|
|
LOG.debug('While importing %r', fullname, exc_info=True)
|
|
self._send_module_load_failed(stream, fullname)
|
|
|
|
def _on_get_module(self, msg):
|
|
if msg.is_dead:
|
|
return
|
|
|
|
LOG.debug('%r._on_get_module(%r)', self, msg.data)
|
|
stream = self._router.stream_by_id(msg.src_id)
|
|
fullname = msg.data.decode()
|
|
if fullname in stream.sent_modules:
|
|
LOG.warning('_on_get_module(): dup request for %r from %r',
|
|
fullname, stream)
|
|
|
|
self._send_module_and_related(stream, fullname)
|
|
|
|
def _send_forward_module(self, stream, context, fullname):
|
|
if stream.remote_id != context.context_id:
|
|
stream.send(
|
|
mitogen.core.Message(
|
|
data=b('%s\x00%s' % (context.context_id, fullname)),
|
|
handle=mitogen.core.FORWARD_MODULE,
|
|
dst_id=stream.remote_id,
|
|
)
|
|
)
|
|
|
|
def _forward_module(self, context, fullname):
|
|
IOLOG.debug('%r._forward_module(%r, %r)', self, context, fullname)
|
|
path = []
|
|
while fullname:
|
|
path.append(fullname)
|
|
fullname, _, _ = fullname.rpartition('.')
|
|
|
|
for fullname in reversed(path):
|
|
stream = self._router.stream_by_id(context.context_id)
|
|
self._send_module_and_related(stream, fullname)
|
|
self._send_forward_module(stream, context, fullname)
|
|
|
|
def forward_module(self, context, fullname):
|
|
self._router.broker.defer(self._forward_module, context, fullname)
|
|
|
|
|
|
class Broker(mitogen.core.Broker):
|
|
shutdown_timeout = 5.0
|
|
_watcher = None
|
|
poller_class = mitogen.parent.PREFERRED_POLLER
|
|
|
|
def __init__(self, install_watcher=True):
|
|
if install_watcher:
|
|
self._watcher = ThreadWatcher.watch(
|
|
target=threading.currentThread(),
|
|
on_join=self.shutdown,
|
|
)
|
|
super(Broker, self).__init__()
|
|
|
|
def shutdown(self):
|
|
super(Broker, self).shutdown()
|
|
if self._watcher:
|
|
self._watcher.remove()
|
|
|
|
|
|
class Router(mitogen.parent.Router):
|
|
broker_class = Broker
|
|
profiling = False
|
|
|
|
def __init__(self, broker=None, max_message_size=None):
|
|
if broker is None:
|
|
broker = self.broker_class()
|
|
if max_message_size:
|
|
self.max_message_size = max_message_size
|
|
super(Router, self).__init__(broker)
|
|
self.upgrade()
|
|
|
|
def upgrade(self):
|
|
self.id_allocator = IdAllocator(self)
|
|
self.responder = ModuleResponder(self)
|
|
self.log_forwarder = LogForwarder(self)
|
|
self.route_monitor = mitogen.parent.RouteMonitor(router=self)
|
|
self.add_handler( # TODO: cutpaste.
|
|
fn=self._on_detaching,
|
|
handle=mitogen.core.DETACHING,
|
|
persist=True,
|
|
)
|
|
|
|
def enable_debug(self):
|
|
mitogen.core.enable_debug_logging()
|
|
self.debug = True
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, e_type, e_val, tb):
|
|
self.broker.shutdown()
|
|
self.broker.join()
|
|
|
|
def disconnect_stream(self, stream):
|
|
self.broker.defer(stream.on_disconnect, self.broker)
|
|
|
|
def disconnect_all(self):
|
|
for stream in self._stream_by_id.values():
|
|
self.disconnect_stream(stream)
|
|
|
|
|
|
class IdAllocator(object):
|
|
def __init__(self, router):
|
|
self.router = router
|
|
self.next_id = 1
|
|
self.lock = threading.Lock()
|
|
router.add_handler(
|
|
fn=self.on_allocate_id,
|
|
handle=mitogen.core.ALLOCATE_ID,
|
|
)
|
|
|
|
def __repr__(self):
|
|
return 'IdAllocator(%r)' % (self.router,)
|
|
|
|
BLOCK_SIZE = 1000
|
|
|
|
def allocate(self):
|
|
self.lock.acquire()
|
|
try:
|
|
id_ = self.next_id
|
|
self.next_id += 1
|
|
return id_
|
|
finally:
|
|
self.lock.release()
|
|
|
|
def allocate_block(self):
|
|
self.lock.acquire()
|
|
try:
|
|
id_ = self.next_id
|
|
self.next_id += self.BLOCK_SIZE
|
|
end_id = id_ + self.BLOCK_SIZE
|
|
LOG.debug('%r: allocating [%d..%d)', self, id_, end_id)
|
|
return id_, end_id
|
|
finally:
|
|
self.lock.release()
|
|
|
|
def on_allocate_id(self, msg):
|
|
if msg.is_dead:
|
|
return
|
|
|
|
id_, last_id = self.allocate_block()
|
|
requestee = self.router.context_by_id(msg.src_id)
|
|
allocated = self.router.context_by_id(id_, msg.src_id)
|
|
|
|
LOG.debug('%r: allocating [%r..%r) to %r',
|
|
self, id_, last_id, requestee)
|
|
msg.reply((id_, last_id))
|