From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1A47C433E0 for ; Thu, 14 May 2020 06:11:43 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AD38E206D8 for ; Thu, 14 May 2020 06:11:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="gA5qrAYF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AD38E206D8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44368 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jZ75q-0006ae-SO for qemu-devel@archiver.kernel.org; Thu, 14 May 2020 02:11:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36666) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jZ6pk-00063V-T4 for qemu-devel@nongnu.org; Thu, 14 May 2020 01:55:04 -0400 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:51630 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jZ6pi-0001mj-Rl for qemu-devel@nongnu.org; Thu, 14 May 2020 01:55:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1589435702; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=lQgTC1NAlLzyKabzDAvHVB05mAI15cmOJ+EmihX/nkQ=; b=gA5qrAYFr8Y60qdQXh+Pi4EkK1O9sdDKY/wVXl84UhS7bFCgK27Qor2787JeiW/HA3tOgm v2cYduC5nwrHTmvb75wrBchUNc0DDIP4LwJ6IdxEEwzH6voSBBrEEGMlh/Si8GEL6y5hnx 0Cge3tivohBQ1dvhEBUg4e/deBrXtIQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-496-BEoKkuYpMfaWbFsVQezdLg-1; Thu, 14 May 2020 01:54:58 -0400 X-MC-Unique: BEoKkuYpMfaWbFsVQezdLg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E59401841958; Thu, 14 May 2020 05:54:56 +0000 (UTC) Received: from probe.redhat.com (ovpn-113-9.rdu2.redhat.com [10.10.113.9]) by smtp.corp.redhat.com (Postfix) with ESMTP id 890C06A977; Thu, 14 May 2020 05:54:55 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH RFC 27/32] python//machine.py: Add _qmp access shim Date: Thu, 14 May 2020 01:53:58 -0400 Message-Id: <20200514055403.18902-28-jsnow@redhat.com> In-Reply-To: <20200514055403.18902-1-jsnow@redhat.com> References: <20200514055403.18902-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=205.139.110.61; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/13 22:25:42 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Kevin Wolf , Vladimir Sementsov-Ogievskiy , Eduardo Habkost , qemu-block@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , Markus Armbruster , Max Reitz , John Snow , Cleber Rosa , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Like many other Optional[] types, it's not always a given that this object will be set. Wrap it in a type-shim that raises a meaningful error and will always return a concrete type. Signed-off-by: John Snow --- python/qemu/lib/machine.py | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/python/qemu/lib/machine.py b/python/qemu/lib/machine.py index 34e6b6f9e9..dfa8449b62 100644 --- a/python/qemu/lib/machine.py +++ b/python/qemu/lib/machine.py @@ -117,7 +117,7 @@ def __init__(self, binary, args=None, wrapper=None, name=None, self._events = [] self._iolog = None self._qmp_set = True # Enable QMP monitor by default. - self._qmp = None + self._qmp_connection: Optional[qmp.QEMUMonitorProtocol] = None self._qemu_full_args = None self._temp_dir = None self._launched = False @@ -283,7 +283,7 @@ def _pre_launch(self): if self._remove_monitor_sockfile: assert isinstance(self._monitor_address, str) self._remove_files.append(self._monitor_address) - self._qmp = qmp.QEMUMonitorProtocol( + self._qmp_connection = qmp.QEMUMonitorProtocol( self._monitor_address, server=True, nickname=self._name @@ -416,7 +416,13 @@ def set_qmp_monitor(self, enabled=True): self._qmp_set = True else: self._qmp_set = False - self._qmp = None + self._qmp_connection = None + + @property + def _qmp(self) -> qmp.QEMUMonitorProtocol: + if self._qmp_connection is None: + raise QEMUMachineError("Attempt to access QMP with no connection") + return self._qmp_connection @classmethod def _qmp_args(cls, _conv_keys: bool = True, **args: Any) -> Dict[str, Any]: -- 2.21.1