Refine `Actor` status iface, use `Aid` throughout

To simplify `.pformat()` output when the new `privates: bool` is unset
(the default) this adds new public attrs to wrap an actor's
cancellation status as well as provide a `.repr_state: str` (similar to
our equiv on `Context`). Rework `.pformat()` to render a much simplified
repr using all these new refinements.

Further, port the `.cancel()` method to use `.msg.types.Aid` for all
internal `requesting_uid` refs (now renamed with `_aid`) and in all
called downstream methods.

New cancel-state iface deats,
- rename `._cancel_called_by_remote` -> `._cancel_called_by` and expect
  it to be set as an `Aid`.
- add `.cancel_complete: bool` which flags whether `.cancel()` ran to
  completion.
- add `.cancel_called: bool` which just wraps `._cancel_called` (and
  which likely will just be dropped since we already have
  `._cancel_called_by`).
- add `.cancel_caller: Aid|None` which wraps `._cancel_called_by`.

In terms of using `Aid` in cancel methods,
- rename vars with `_aid` suffix in `.cancel()` (and wherever else).
- change `.cancel_rpc_tasks()` input param to `req_aid: msgtypes.Aid`.
- do the same for `._cancel_task()` and (for now until we adjust its
  internals as well) use the `Aid.uid` remap property when assigning
  `Context._canceller`.
- adjust all log msg refs to match obvi.

tests/ipc/test_server.py

@@ -49,7 +49,7 @@ def test_basic_ipc_server(
             )
             assert server._no_more_peers.is_set()
 
-            eps: list[ipc.IPCEndpoint] = await server.listen_on(
+            eps: list[ipc._server.Endpoint] = await server.listen_on(
                 accept_addrs=[rando_addr],
                 stream_handler_nursery=None,
             )

tractor/_runtime.py

@@ -234,7 +234,7 @@ class Actor:
 
         # state
         self._cancel_complete = trio.Event()
-        self._cancel_called_by_remote: tuple[str, tuple]|None = None
+        self._cancel_called_by: tuple[str, tuple]|None = None
         self._cancel_called: bool = False
 
         # retreive and store parent `__main__` data which
@@ -346,69 +346,118 @@ class Actor:
     def pid(self) -> int:
         return self._aid.pid
 
+    @property
+    def repr_state(self) -> str:
+        if self.cancel_complete:
+            return 'cancelled'
+
+        elif canceller := self.cancel_caller:
+                return f' and cancel-called by {canceller}'
+
+        else:
+            return 'running'
+
     def pformat(
         self,
         ds: str = ': ',
         indent: int = 0,
+        privates: bool = False,
     ) -> str:
-        fields_sect_prefix: str = ' |_'
+
-        parent_uid: tuple|None = None
+        fmtstr: str = f'|_id: {self.aid.reprol()!r}\n'
+        if privates:
+            aid_nest_prefix: str = '|_aid='
+            aid_field_repr: str = _pformat.nest_from_op(
+                input_op='',
+                text=pretty_struct.pformat(
+                    struct=self.aid,
+                    field_indent=2,
+                ),
+                op_suffix='',
+                nest_prefix=aid_nest_prefix,
+                nest_indent=0,
+            )
+            fmtstr: str = f'{aid_field_repr}'
+
         if rent_chan := self._parent_chan:
-            parent_uid = rent_chan.uid
+            fmtstr += (
+                f"|_parent{ds}{rent_chan.aid.reprol()}\n"
+            )
 
-        peers: list = []
         server: _server.IPCServer = self.ipc_server
-        ipc_server_sect: str = ''
         if server:
-            peers: list[tuple] = list(server._peer_connected)
+            if privates:
+                server_repr: str = self._ipc_server.pformat(
+                    privates=privates,
+                )
+                # create field ln as a key-header indented under
+                # and up to the section's key prefix.
+                # ^XXX if we were to indent `repr(Server)` to
+                # '<key>: '
+                #  _here_^
+                server_repr: str = _pformat.nest_from_op(
+                    input_op='',  # nest as sub-obj
+                    op_suffix='',
+                    text=server_repr,
+                )
+                fmtstr += (
+                    f"{server_repr}"
+                )
+            else:
+                fmtstr += (
+                    f'|_ipc: {server.repr_state!r}\n'
+                )
 
-            # create field ln as a key-header indented under
+        fmtstr += (
-            # and up to the section's key prefix.
+            f'|_rpc: {len(self._rpc_tasks)} active tasks\n'
-            # field_ln_header: str = textwrap.indent(
-            #     text=f"ipc_server{ds}",
-            #     prefix=' '*len(fields_sect_prefix),
-            # )
-            # ^XXX if we were to indent `repr(Server)` to
-            # '<key>: '
-            #  _here_^
-            server_repr: str = textwrap.indent(
-                text=self._ipc_server.pformat(),
-                # prefix=' '*len(field_ln_header),
-                prefix=' '*len(fields_sect_prefix),
-            )
-            ipc_server_sect: str = (
-                # f'{field_ln_header}\n'
-                f'{server_repr}'
-            )
-
-        fmtstr: str = (
-            f' |_id: {self.aid!r}\n'
-            # f"   aid{ds}{self.aid!r}\n"
-            f"   parent{ds}{parent_uid}\n"
-            # f'\n'
-            f' |_ipc: {len(peers)!r} connected peers\n'
-            f"   peers{ds}{peers!r}\n"
-            f"{ipc_server_sect}"
-            # f'\n'
-            f' |_rpc: {len(self._rpc_tasks)} tasks\n'
-            f"   ctxs{ds}{len(self._contexts)}\n"
-            # f'\n'
-            f' |_runtime: ._task{ds}{self._task!r}\n'
-            f'   _spawn_method{ds}{self._spawn_method}\n'
-            f'   _actoruid2nursery{ds}{self._actoruid2nursery}\n'
-            f'   _forkserver_info{ds}{self._forkserver_info}\n'
-            # f'\n'
-            f' |_state: "TODO: .repr_state()"\n'
-            f'   _cancel_complete{ds}{self._cancel_complete}\n'
-            f'   _cancel_called_by_remote{ds}{self._cancel_called_by_remote}\n'
-            f'   _cancel_called{ds}{self._cancel_called}\n'
         )
+
+        # TODO, actually fix the .repr_state impl/output?
+        # append ipc-ctx state summary
+        # ctxs: dict = self._contexts
+        # if ctxs:
+        #     ctx_states: dict[str, int] = {}
+        #     for ctx in self._contexts.values():
+        #         ctx_state: str = ctx.repr_state
+        #         cnt = ctx_states.setdefault(ctx_state, 0)
+        #         ctx_states[ctx_state] = cnt + 1
+
+        #     fmtstr += (
+        #         f"  ctxs{ds}{ctx_states}\n"
+        #     )
+
+        # runtime-state
+        task_name: str = '<dne>'
+        if task := self._task:
+            task_name: str = task.name
+        fmtstr += (
+            # TODO, this just like ctx?
+            f'|_state: {self.repr_state!r}\n'
+            f'  task: {task_name}\n'
+            f'  loglevel: {self.loglevel!r}\n'
+            f'  subactors_spawned: {len(self._actoruid2nursery)}\n'
+        )
+        if not _state.is_root_process():
+            fmtstr += f'  spawn_method: {self._spawn_method!r}\n'
+
+        if privates:
+            fmtstr += (
+                # f'  actoruid2nursery{ds}{self._actoruid2nursery}\n'
+                f'  cancel_complete{ds}{self._cancel_complete}\n'
+                f'  cancel_called_by_remote{ds}{self._cancel_called_by}\n'
+                f'  cancel_called{ds}{self._cancel_called}\n'
+            )
+
+        if fmtstr:
+            fmtstr: str = textwrap.indent(
+                text=fmtstr,
+                prefix=' '*(1 + indent),
+            )
+
         _repr: str = (
-            '<Actor(\n'
+            f'<{type(self).__name__}(\n'
-            +
+            f'{fmtstr}'
-            fmtstr
+            f')>\n'
-            +
-            ')>\n'
         )
         if indent:
             _repr: str = textwrap.indent(
@@ -533,11 +582,11 @@ class Actor:
         queue.
 
         '''
-        uid: tuple[str, str] = chan.uid
+        aid: msgtypes.Aid = chan.aid
-        assert uid, f"`chan.uid` can't be {uid}"
+        assert aid, f"`chan.aid` can't be {aid}"
         try:
             ctx: Context = self._contexts[(
-                uid,
+                aid.uid,
                 cid,
 
                 # TODO: how to determine this tho?
@@ -548,7 +597,7 @@ class Actor:
                 'Ignoring invalid IPC msg!?\n'
                 f'Ctx seems to not/no-longer exist??\n'
                 f'\n'
-                f'<=? {uid}\n'
+                f'<=? {aid.reprol()!r}\n'
                 f'  |_{pretty_struct.pformat(msg)}\n'
             )
             match msg:
@@ -597,6 +646,7 @@ class Actor:
           msging session's lifetime.
 
         '''
+        # ?TODO, use Aid here as well?
         actor_uid = chan.uid
         assert actor_uid
         try:
@@ -945,6 +995,22 @@ class Actor:
             None,  # self cancel all rpc tasks
         )
 
+    @property
+    def cancel_complete(self) -> bool:
+        return self._cancel_complete.is_set()
+
+    @property
+    def cancel_called(self) -> bool:
+        '''
+        Was this actor requested to cancel by a remote peer actor.
+
+        '''
+        return self._cancel_called_by is not None
+
+    @property
+    def cancel_caller(self) -> msgtypes.Aid|None:
+        return self._cancel_called_by
+
     async def cancel(
         self,
 
@@ -969,20 +1035,18 @@ class Actor:
 
         '''
         (
-            requesting_uid,
+            requesting_aid,  # Aid
-            requester_type,
+            requester_type,  # str
             req_chan,
             log_meth,
         ) = (
-            req_chan.uid,
+            req_chan.aid,
             'peer',
             req_chan,
             log.cancel,
-
         ) if req_chan else (
-
             # a self cancel of ALL rpc tasks
-            self.uid,
+            self.aid,
             'self',
             self,
             log.runtime,
@@ -990,14 +1054,14 @@ class Actor:
         # TODO: just use the new `Context.repr_rpc: str` (and
         # other) repr fields instead of doing this all manual..
         msg: str = (
-            f'Actor-runtime cancel request from {requester_type}\n\n'
+            f'Actor-runtime cancel request from {requester_type!r}\n'
-            f'<=c) {requesting_uid}\n'
-            f'  |_{self}\n'
             f'\n'
+            f'<=c)\n'
+            f'{self}'
         )
 
         # TODO: what happens here when we self-cancel tho?
-        self._cancel_called_by_remote: tuple = requesting_uid
+        self._cancel_called_by: tuple = requesting_aid
         self._cancel_called = True
 
         # cancel all ongoing rpc tasks
@@ -1025,7 +1089,7 @@ class Actor:
 
             # self-cancel **all** ongoing RPC tasks
             await self.cancel_rpc_tasks(
-                req_uid=requesting_uid,
+                req_aid=requesting_aid,
                 parent_chan=None,
             )
 
@@ -1054,8 +1118,7 @@ class Actor:
         self,
         cid: str,
         parent_chan: Channel,
-        requesting_uid: tuple[str, str]|None,
+        requesting_aid: msgtypes.Aid|None,
-        # ^^TODO! use the `Aid` directly here!
 
         ipc_msg: dict|None|bool = False,
 
@@ -1093,7 +1156,7 @@ class Actor:
             log.runtime(
                 'Cancel request for invalid RPC task.\n'
                 'The task likely already completed or was never started!\n\n'
-                f'<= canceller: {requesting_uid}\n'
+                f'<= canceller: {requesting_aid}\n'
                 f'=> {cid}@{parent_chan.uid}\n'
                 f'  |_{parent_chan}\n'
             )
@@ -1101,7 +1164,7 @@ class Actor:
 
         log.cancel(
             'Rxed cancel request for RPC task\n'
-            f'{ctx._task!r} <=c) {requesting_uid}\n'
+            f'{ctx._task!r} <=c) {requesting_aid}\n'
             f'|_>> {ctx.repr_rpc}\n'
 
             # f'|_{ctx._task}\n'
@@ -1127,9 +1190,9 @@ class Actor:
         )
         if (
             ctx._canceller is None
-            and requesting_uid
+            and requesting_aid
         ):
-            ctx._canceller: tuple = requesting_uid
+            ctx._canceller: tuple = requesting_aid.uid
 
         # TODO: pack the RPC `{'cmd': <blah>}` msg into a ctxc and
         # then raise and pack it here?
@@ -1155,7 +1218,7 @@ class Actor:
 
         # wait for _invoke to mark the task complete
         flow_info: str = (
-            f'<= canceller: {requesting_uid}\n'
+            f'<= canceller: {requesting_aid}\n'
             f'=> ipc-parent: {parent_chan}\n'
             f'|_{ctx}\n'
         )
@@ -1172,7 +1235,7 @@ class Actor:
 
     async def cancel_rpc_tasks(
         self,
-        req_uid: tuple[str, str],
+        req_aid: msgtypes.Aid,
 
         # NOTE: when None is passed we cancel **all** rpc
         # tasks running in this actor!
@@ -1189,7 +1252,7 @@ class Actor:
         if not tasks:
             log.runtime(
                 'Actor has no cancellable RPC tasks?\n'
-                f'<= canceller: {req_uid}\n'
+                f'<= canceller: {req_aid.reprol()}\n'
             )
             return
 
@@ -1229,7 +1292,7 @@ class Actor:
         )
         log.cancel(
             f'Cancelling {descr} RPC tasks\n\n'
-            f'<=c) {req_uid} [canceller]\n'
+            f'<=c) {req_aid} [canceller]\n'
             f'{rent_chan_repr}'
             f'c)=> {self.uid} [cancellee]\n'
             f'  |_{self} [with {len(tasks)} tasks]\n'
@@ -1257,7 +1320,7 @@ class Actor:
             await self._cancel_task(
                 cid,
                 task_caller_chan,
-                requesting_uid=req_uid,
+                requesting_aid=req_aid,
             )
 
         if tasks:
@@ -1554,8 +1617,9 @@ async def async_main(
                     # 'Blocking on service nursery to exit..\n'
                 )
             log.runtime(
-                "Service nursery complete\n"
+                'Service nursery complete\n'
-                "Waiting on root nursery to complete"
+                '\n'
+                '-> Waiting on root nursery to complete'
             )
 
         # Blocks here as expected until the root nursery is
@@ -1705,7 +1769,7 @@ async def async_main(
     )
     teardown_report += (
         'Actor runtime exited\n'
-        f'{op_nested_actor_repr}\n'
+        f'{op_nested_actor_repr}'
     )
     log.info(teardown_report)
 

tractor/devx/pformat.py

@@ -15,8 +15,10 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 '''
-Pretty formatters for use throughout the code base.
+Pretty formatters for use throughout our internals.
-Mostly handy for logging and exception message content.
+
+Handy for logging and exception message content but also for `repr()`
+in REPL(s).
 
 '''
 import sys
@@ -224,8 +226,8 @@ def pformat_cs(
     field_prefix: str = ' |_',
 ) -> str:
     '''
-    Pretty format info about a `trio.CancelScope` including most
+    Pretty format info about a `trio.CancelScope` including most of
-    of its public state and `._cancel_status`.
+    its public state and `._cancel_status`.
 
     The output can be modified to show a "var name" for the
     instance as a field prefix, just a simple str before each
@@ -252,9 +254,12 @@ def pformat_cs(
 def nest_from_op(
     input_op: str,  # TODO, Literal of all op-"symbols" from below?
     text: str,
+    prefix_op: bool = True,  # unset is to suffix the first line
+    # optionally suffix `text`, by def on a newline
+    op_suffix='\n',
 
     nest_prefix: str = '|_',
-    nest_indent: int = 0,
+    nest_indent: int|None = None,
     # XXX indent `next_prefix` "to-the-right-of" `input_op`
     # by this count of whitespaces (' ').
 
@@ -348,11 +353,15 @@ def nest_from_op(
             prefix=nest_indent*' ',
         )
 
-    tree_str_indent: int = len(nest_prefix)
+    indented_tree_str: str = text
-    indented_tree_str: str = textwrap.indent(
+    tree_str_indent: int = 0
-        text,
+    if nest_indent != 0:
-        prefix=' '*tree_str_indent
+        tree_str_indent: int = len(nest_prefix)
-    )
+        indented_tree_str: str = textwrap.indent(
+            text,
+            prefix=' '*tree_str_indent
+        )
+
     # inject any provided nesting-prefix chars
     # into the head of the first line.
     if nest_prefix:
@@ -360,7 +369,126 @@ def nest_from_op(
             f'{nest_prefix}{indented_tree_str[tree_str_indent:]}'
         )
 
-    return (
+    if prefix_op:
-        f'{input_op}\n'
+        return (
-        f'{indented_tree_str}'
+            f'{input_op}{op_suffix}'
+            f'{indented_tree_str}'
+        )
+    else:
+        tree_lns: list[str] = indented_tree_str.splitlines()
+        first: str = tree_lns[0]
+        rest: str = '\n'.join(tree_lns[1:])
+        return (
+            f'{first}{input_op}{op_suffix}'
+            f'{rest}'
+        )
+
+
+# ------ modden.repr ------
+# XXX originally taken verbaatim from `modden.repr`
+'''
+More "multi-line" representation then the stdlib's `pprint` equivs.
+
+'''
+from inspect import (
+    FrameInfo,
+    stack,
+)
+import pprint
+import reprlib
+from typing import (
+    Callable,
+)
+
+
+def mk_repr(
+    **repr_kws,
+) -> Callable[[str], str]:
+    '''
+    Allocate and deliver a `repr.Repr` instance with provided input
+    settings using the std-lib's `reprlib` mod,
+     * https://docs.python.org/3/library/reprlib.html
+
+    ------ Ex. ------
+    An up to 6-layer-nested `dict` as multi-line:
+    - https://stackoverflow.com/a/79102479
+    - https://docs.python.org/3/library/reprlib.html#reprlib.Repr.maxlevel
+
+    '''
+    def_kws: dict[str, int] = dict(
+        indent=3,  # indent used for repr of recursive objects
+        maxlevel=616,  # recursion levels
+        maxdict=616,  # max items shown for `dict`
+        maxlist=616,  # max items shown for `dict`
+        maxstring=616,  # match editor line-len limit
+        maxtuple=616,  # match editor line-len limit
+        maxother=616,  # match editor line-len limit
     )
+    def_kws |= repr_kws
+    reprr = reprlib.Repr(**def_kws)
+    return reprr.repr
+
+
+def ppfmt(
+    obj: object,
+    do_print: bool = False,
+) -> str:
+    '''
+    The `pprint.pformat()` version of `pprint.pp()`, namely
+    a default `sort_dicts=False`.. (which i think should be
+    the normal default in the stdlib).
+
+    '''
+    pprepr: Callable = mk_repr()
+    repr_str: str = pprepr(obj)
+
+    if do_print:
+        return pprint.pp(repr_str)
+
+    return repr_str
+
+
+pformat = ppfmt
+
+
+def pfmt_frame_info(fi: FrameInfo) -> str:
+    '''
+    Like a std `inspect.FrameInfo.__repr__()` but multi-line..
+
+    '''
+    return (
+        'FrameInfo(\n'
+        '  frame={!r},\n'
+        '  filename={!r},\n'
+        '  lineno={!r},\n'
+        '  function={!r},\n'
+        '  code_context={!r},\n'
+        '  index={!r},\n'
+        '  positions={!r})'
+        ).format(
+            fi.frame,
+            fi.filename,
+            fi.lineno,
+            fi.function,
+            fi.code_context,
+            fi.index,
+            fi.positions
+        )
+
+
+def pfmt_callstack(frames: int = 1) -> str:
+    '''
+    Generate a string of nested `inspect.FrameInfo` objects returned
+    from a `inspect.stack()` call such that only the `.frame` field
+    for each  layer is pprinted.
+
+    '''
+    caller_frames: list[FrameInfo] =  stack()[1:1+frames]
+    frames_str: str = ''
+    for i, frame_info in enumerate(caller_frames):
+        frames_str += textwrap.indent(
+            f'{frame_info.frame!r}\n',
+            prefix=' '*i,
+
+        )
+    return frames_str

tractor/ipc/_chan.py

@@ -196,9 +196,12 @@ class Channel:
             self._transport.codec = orig
 
     # TODO: do a .src/.dst: str for maddrs?
-    def pformat(self) -> str:
+    def pformat(
+        self,
+        privates: bool = False,
+    ) -> str:
         if not self._transport:
-            return '<Channel with inactive transport?>'
+            return '<Channel( with inactive transport? )>'
 
         tpt: MsgTransport = self._transport
         tpt_name: str = type(tpt).__name__
@@ -206,14 +209,17 @@ class Channel:
             'connected' if self.connected()
             else 'closed'
         )
-        return (
+        repr_str: str = (
             f'<Channel(\n'
             f' |_status: {tpt_status!r}\n'
+        ) + (
             f'   _closed={self._closed}\n'
             f'   _cancel_called={self._cancel_called}\n'
-            f'\n'
+            if privates else ''
-            f' |_peer: {self.aid}\n'
+        ) + (  # peer-actor (processs) section
-            f'\n'
+            f' |_peer: {self.aid.reprol()!r}\n'
+           if self.aid else '<unknown>'
+        ) + (
             f' |_msgstream: {tpt_name}\n'
             f'   proto={tpt.laddr.proto_key!r}\n'
             f'   layer={tpt.layer_key!r}\n'
@@ -223,9 +229,13 @@ class Channel:
             f'   stream={tpt.stream}\n'
             f'   maddr={tpt.maddr!r}\n'
             f'   drained={tpt.drained}\n'
+        ) + (
             f'   _send_lock={tpt._send_lock.statistics()}\n'
-            f')>\n'
+            if privates else ''
+        ) + (
+            ')>\n'
         )
+        return repr_str
 
     # NOTE: making this return a value that can be passed to
     # `eval()` is entirely **optional** FYI!

tractor/ipc/_server.py

@@ -289,7 +289,7 @@ async def maybe_wait_on_canced_subs(
 #
 # -[x] maybe change to mod-func and rename for implied
 #    multi-transport semantics?
-# -[ ] register each stream/tpt/chan with the owning `IPCEndpoint`
+# -[ ] register each stream/tpt/chan with the owning `Endpoint`
 #     so that we can query per tpt all peer contact infos?
 #  |_[ ] possibly provide a global viewing via a
 #        `collections.ChainMap`?
@@ -309,7 +309,7 @@ async def handle_stream_from_peer(
     any `IPCServer.listen_on()` passed `stream_handler_tn: Nursery`
     such that it is invoked as,
 
-      IPCEndpoint.stream_handler_tn.start_soon(
+      Endpoint.stream_handler_tn.start_soon(
           handle_stream,
           stream,
       )
@@ -577,7 +577,7 @@ async def handle_stream_from_peer(
     # finally block closure
 
 
-class IPCEndpoint(Struct):
+class Endpoint(Struct):
     '''
     An instance of an IPC "bound" address where the lifetime of the
     "ability to accept connections" (from clients) and then handle
@@ -636,7 +636,7 @@ class IPCEndpoint(Struct):
         )
 
 
-class IPCServer(Struct):
+class Server(Struct):
     _parent_tn: Nursery
     _stream_handler_tn: Nursery
     # level-triggered sig for whether "no peers are currently
@@ -644,7 +644,7 @@ class IPCServer(Struct):
     # initialized with `.is_set() == True`.
     _no_more_peers: trio.Event
 
-    _endpoints: list[IPCEndpoint] = []
+    _endpoints: list[Endpoint] = []
 
     # connection tracking & mgmt
     _peers: defaultdict[
@@ -659,10 +659,10 @@ class IPCServer(Struct):
     # syncs for setup/teardown sequences
     _shutdown: trio.Event|None = None
 
-    # TODO, maybe just make `._endpoints: list[IPCEndpoint]` and
+    # TODO, maybe just make `._endpoints: list[Endpoint]` and
     # provide dict-views onto it?
     # @property
-    # def addrs2eps(self) -> dict[Address, IPCEndpoint]:
+    # def addrs2eps(self) -> dict[Address, Endpoint]:
     #     ...
 
     @property
@@ -708,7 +708,7 @@ class IPCServer(Struct):
             await self._shutdown.wait()
         else:
             tpt_protos: list[str] = []
-            ep: IPCEndpoint
+            ep: Endpoint
             for ep in self._endpoints:
                 tpt_protos.append(ep.addr.proto_key)
 
@@ -790,7 +790,7 @@ class IPCServer(Struct):
 
     def epsdict(self) -> dict[
         Address,
-        IPCEndpoint,
+        Endpoint,
     ]:
         return {
             ep.addr: ep
@@ -804,7 +804,7 @@ class IPCServer(Struct):
         return ev.is_set()
 
     def pformat(self) -> str:
-        eps: list[IPCEndpoint] = self._endpoints
+        eps: list[Endpoint] = self._endpoints
 
         state_repr: str = (
             f'{len(eps)!r} IPC-endpoints active'
@@ -835,13 +835,13 @@ class IPCServer(Struct):
 
     # TODO? maybe allow shutting down a `.listen_on()`s worth of
     # listeners by cancelling the corresponding
-    # `IPCEndpoint._listen_tn` only ?
+    # `Endpoint._listen_tn` only ?
     # -[ ] in theory you could use this to
     #     "boot-and-wait-for-reconnect" of all current and connecting
     #     peers?
     #  |_ would require that the stream-handler is intercepted so we
     #     can intercept every `MsgTransport` (stream) and track per
-    #     `IPCEndpoint` likely?
+    #     `Endpoint` likely?
     #
     # async def unlisten(
     #     self,
@@ -854,7 +854,7 @@ class IPCServer(Struct):
         *,
         accept_addrs: list[tuple[str, int|str]]|None = None,
         stream_handler_nursery: Nursery|None = None,
-    ) -> list[IPCEndpoint]:
+    ) -> list[Endpoint]:
         '''
         Start `SocketListeners` (i.e. bind and call `socket.listen()`)
         for all IPC-transport-protocol specific `Address`-types
@@ -888,7 +888,7 @@ class IPCServer(Struct):
             f'Binding to endpoints for,\n'
             f'{accept_addrs}\n'
         )
-        eps: list[IPCEndpoint] = await self._parent_tn.start(
+        eps: list[Endpoint] = await self._parent_tn.start(
             partial(
                 _serve_ipc_eps,
                 server=self,
@@ -904,7 +904,7 @@ class IPCServer(Struct):
         self._endpoints.extend(eps)
         # XXX, just a little bit of sanity
         group_tn: Nursery|None = None
-        ep: IPCEndpoint
+        ep: Endpoint
         for ep in eps:
             if ep.addr not in self.addrs:
                 breakpoint()
@@ -917,6 +917,10 @@ class IPCServer(Struct):
         return eps
 
 
+# alias until we decide on final naming
+IPCServer = Server
+
+
 async def _serve_ipc_eps(
     *,
     server: IPCServer,
@@ -941,12 +945,12 @@ async def _serve_ipc_eps(
         listen_tn: Nursery
         async with trio.open_nursery() as listen_tn:
 
-            eps: list[IPCEndpoint] = []
+            eps: list[Endpoint] = []
             # XXX NOTE, required to call `serve_listeners()` below.
             # ?TODO, maybe just pass `list(eps.values()` tho?
             listeners: list[trio.abc.Listener] = []
             for addr in listen_addrs:
-                ep = IPCEndpoint(
+                ep = Endpoint(
                     addr=addr,
                     listen_tn=listen_tn,
                     stream_handler_tn=stream_handler_tn,
@@ -1010,7 +1014,7 @@ async def _serve_ipc_eps(
     finally:
         if eps:
             addr: Address
-            ep: IPCEndpoint
+            ep: Endpoint
             for addr, ep in server.epsdict().items():
                 ep.close_listener()
                 server._endpoints.remove(ep)

tractor/msg/pretty_struct.py

@@ -20,6 +20,7 @@ Prettified version of `msgspec.Struct` for easier console grokin.
 '''
 from __future__ import annotations
 from collections import UserList
+import textwrap
 from typing import (
     Any,
     Iterator,
@@ -105,27 +106,11 @@ def iter_fields(struct: Struct) -> Iterator[
         )
 
 
-def pformat(
+def iter_struct_ppfmt_lines(
     struct: Struct,
-    field_indent: int = 2,
+    field_indent: int = 0,
-    indent: int = 0,
+) -> Iterator[tuple[str, str]]:
 
-) -> str:
-    '''
-    Recursion-safe `pprint.pformat()` style formatting of
-    a `msgspec.Struct` for sane reading by a human using a REPL.
-
-    '''
-    # global whitespace indent
-    ws: str = ' '*indent
-
-    # field whitespace indent
-    field_ws: str = ' '*(field_indent + indent)
-
-    # qtn: str = ws + struct.__class__.__qualname__
-    qtn: str = struct.__class__.__qualname__
-
-    obj_str: str = ''  # accumulator
     fi: structs.FieldInfo
     k: str
     v: Any
@@ -135,15 +120,18 @@ def pformat(
         # ..]` over .__name__ == `Literal` but still get only the
         # latter for simple types like `str | int | None` etc..?
         ft: type = fi.type
-        typ_name: str = getattr(ft, '__name__', str(ft))
+        typ_name: str = getattr(
+            ft,
+            '__name__',
+            str(ft)
+        ).replace(' ', '')
 
         # recurse to get sub-struct's `.pformat()` output Bo
         if isinstance(v, Struct):
-            val_str: str =  v.pformat(
+            yield from iter_struct_ppfmt_lines(
-                indent=field_indent + indent,
+                struct=v,
-                field_indent=indent + field_indent,
+                field_indent=field_indent+field_indent,
             )
-
         else:
             val_str: str = repr(v)
 
@@ -161,8 +149,39 @@ def pformat(
                 # raise
                 # return _Struct.__repr__(struct)
 
-        # TODO: LOLOL use `textwrap.indent()` instead dawwwwwg!
+        yield (
-        obj_str += (field_ws + f'{k}: {typ_name} = {val_str},\n')
+            ' '*field_indent,  # indented ws prefix
+            f'{k}: {typ_name} = {val_str},',  # field's repr line content
+        )
+
+
+def pformat(
+    struct: Struct,
+    field_indent: int = 2,
+    indent: int = 0,
+) -> str:
+    '''
+    Recursion-safe `pprint.pformat()` style formatting of
+    a `msgspec.Struct` for sane reading by a human using a REPL.
+
+    '''
+    obj_str: str = ''  # accumulator
+    for prefix, field_repr, in iter_struct_ppfmt_lines(
+        struct,
+        field_indent=field_indent,
+    ):
+        obj_str += f'{prefix}{field_repr}\n'
+
+    # global whitespace indent
+    ws: str = ' '*indent
+    if indent:
+        obj_str: str = textwrap.indent(
+            text=obj_str,
+            prefix=ws,
+        )
+
+    # qtn: str = ws + struct.__class__.__qualname__
+    qtn: str = struct.__class__.__qualname__
 
     return (
         f'{qtn}(\n'

tractor/msg/types.py

@@ -154,6 +154,29 @@ class Aid(
     #     should also include at least `.pid` (equiv to port for tcp)
     #     and/or host-part always?
 
+    @property
+    def uid(self) -> tuple[str, str]:
+        '''
+        Legacy actor "unique-id" pair format.
+
+        '''
+        return (
+            self.name,
+            self.uuid,
+        )
+
+    def reprol(
+        self,
+        sin_uuid: bool = True,
+    ) -> str:
+        if not sin_uuid:
+            return (
+                f'{self.name}[{self.uuid[:6]}]@{self.pid!r}'
+            )
+        return (
+            f'{self.name}@{self.pid!r}'
+        )
+
 
 class SpawnSpec(
     pretty_struct.Struct,