python/aqmp: fully separate from qmp.QEMUMonitorProtocol

After this patch, qemu.aqmp.legacy.QEMUMonitorProtocol no longer
inherits from qemu.qmp.QEMUMonitorProtocol. To do this, several
inherited methods need to be explicitly re-defined.

(Licensing: This is copying and modifying GPLv2-only code into a
GPLv2-only file.)

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Beraldo Leal <bleal@redhat.com>
Message-id: 20220330172812.3427355-4-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>

python/qemu/aqmp/legacy.py

@@ -16,18 +16,18 @@
 #
 
 import asyncio
+from types import TracebackType
 from typing import (
     Any,
     Awaitable,
     Dict,
     List,
     Optional,
+    Type,
     TypeVar,
     Union,
 )
 
-import qemu.qmp
-
 from .error import QMPError
 from .protocol import Runstate, SocketAddrT
 from .qmp_client import QMPClient
@@ -59,12 +59,11 @@ class QMPBadPortError(QMPError):
     """
 
 
-class QEMUMonitorProtocol(qemu.qmp.QEMUMonitorProtocol):
+class QEMUMonitorProtocol:
     def __init__(self, address: SocketAddrT,
                  server: bool = False,
                  nickname: Optional[str] = None):
 
-        # pylint: disable=super-init-not-called
         self._aqmp = QMPClient(nickname)
         self._aloop = asyncio.get_event_loop()
         self._address = address
@@ -88,7 +87,18 @@ def _get_greeting(self) -> Optional[QMPMessage]:
             return self._aqmp.greeting._asdict()
         return None
 
-    # __enter__ and __exit__ need no changes
+    def __enter__(self: _T) -> _T:
+        # Implement context manager enter function.
+        return self
+
+    def __exit__(self,
+                 # pylint: disable=duplicate-code
+                 # see https://github.com/PyCQA/pylint/issues/3619
+                 exc_type: Optional[Type[BaseException]],
+                 exc_val: Optional[BaseException],
+                 exc_tb: Optional[TracebackType]) -> None:
+        # Implement context manager exit function.
+        self.close()
 
     @classmethod
     def parse_address(cls, address: str) -> SocketAddrT:
@@ -142,7 +152,22 @@ def cmd_obj(self, qmp_cmd: QMPMessage) -> QMPMessage:
             )
         )
 
-    # Default impl of cmd() delegates to cmd_obj
+    def cmd(self, name: str,
+            args: Optional[Dict[str, object]] = None,
+            cmd_id: Optional[object] = None) -> QMPMessage:
+        """
+        Build a QMP command and send it to the QMP Monitor.
+
+        @param name: command name (string)
+        @param args: command arguments (dict)
+        @param cmd_id: command id (dict, list, string or int)
+        """
+        qmp_cmd: QMPMessage = {'execute': name}
+        if args:
+            qmp_cmd['arguments'] = args
+        if cmd_id:
+            qmp_cmd['id'] = cmd_id
+        return self.cmd_obj(qmp_cmd)
 
     def command(self, cmd: str, **kwds: object) -> QMPReturnValue:
         return self._sync(