Android: Reuse task tree for AndroidSignalOperation

Change-Id: I771be32bdc2456e04791be1d9f10bd979209b703
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/android/androidsignaloperation.cpp

@@ -1,99 +1,73 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
-#include "androidconfigurations.h"
 #include "androidsignaloperation.h"
 
+#include "androidconfigurations.h"
+
 #include <utils/qtcprocess.h>
-#include <utils/qtcassert.h>
 
+using namespace Tasking;
 using namespace Utils;
+using namespace std::chrono_literals;
 
-namespace Android {
-namespace Internal {
+namespace Android::Internal {
 
-AndroidSignalOperation::AndroidSignalOperation()
-    : m_adbPath(AndroidConfig::adbToolPath())
-    , m_timeout(new QTimer(this))
-{
-    m_timeout->setInterval(5000);
-    connect(m_timeout, &QTimer::timeout, this, &AndroidSignalOperation::handleTimeout);
-}
-
-AndroidSignalOperation::~AndroidSignalOperation() = default;
-
-bool AndroidSignalOperation::handleCrashMessage()
-{
-    if (m_adbProcess->exitStatus() == QProcess::NormalExit)
-        return false;
-    m_errorMessage = QLatin1String(" adb process exit code: ") + QString::number(m_adbProcess->exitCode());
-    const QString adbError = m_adbProcess->errorString();
-    if (!adbError.isEmpty())
-        m_errorMessage += QLatin1String(" adb process error: ") + adbError;
-    return true;
-}
-
-void AndroidSignalOperation::adbFindRunAsFinished()
-{
-    QTC_ASSERT(m_state == RunAs, return);
-    m_timeout->stop();
-
-    handleCrashMessage();
-    const QString runAs = QString::fromLatin1(m_adbProcess->readAllRawStandardOutput());
-    m_adbProcess.release()->deleteLater();
-    if (runAs.isEmpty() || !m_errorMessage.isEmpty()) {
-        m_errorMessage.prepend(QLatin1String("Cannot find User for process: ")
-                               + QString::number(m_pid));
-        m_state = Idle;
-        emit finished(m_errorMessage);
-    } else {
-        startAdbProcess(Kill, {m_adbPath, {"shell", "run-as", runAs, "kill",
-                                           QString("-%1").arg(m_signal), QString::number(m_pid)}},
-                        [this] { adbKillFinished(); });
-    }
-}
-
-void AndroidSignalOperation::adbKillFinished()
-{
-    QTC_ASSERT(m_state == Kill, return);
-    m_timeout->stop();
-
-    if (!handleCrashMessage())
-        m_errorMessage = QString::fromLatin1(m_adbProcess->readAllRawStandardError());
-    m_adbProcess.release()->deleteLater();
-    if (!m_errorMessage.isEmpty())
-        m_errorMessage.prepend(QLatin1String("Cannot kill process: ") + QString::number(m_pid));
-    m_state = Idle;
-    emit finished(m_errorMessage);
-}
-
-void AndroidSignalOperation::handleTimeout()
-{
-    m_adbProcess.reset();
-    m_timeout->stop();
-    m_state = Idle;
-    m_errorMessage = QLatin1String("adb process timed out");
-    emit finished(m_errorMessage);
-}
+AndroidSignalOperation::AndroidSignalOperation() = default;
 
 void AndroidSignalOperation::signalOperationViaADB(qint64 pid, int signal)
 {
-    QTC_ASSERT(m_state == Idle, return);
-    m_pid = pid;
-    m_signal = signal;
-    startAdbProcess(RunAs, {m_adbPath, {"shell", "cat", QString("/proc/%1/cmdline").arg(m_pid)}},
-                    [this] { adbFindRunAsFinished(); });
-}
+    struct InternalStorage {
+        FilePath adbPath;
+        QString runAs = {};
+        QString errorMessage = {};
+    };
 
-void AndroidSignalOperation::startAdbProcess(State state, const Utils::CommandLine &commandLine,
-                                             FinishHandler handler)
-{
-    m_state = state;
-    m_timeout->start();
-    m_adbProcess.reset(new Process);
-    connect(m_adbProcess.get(), &Process::done, this, handler);
-    m_adbProcess->setCommand(commandLine);
-    m_adbProcess->start();
+    const Storage<InternalStorage> storage({AndroidConfig::adbToolPath()});
+
+    const auto onCatSetup = [storage, pid](Process &process) {
+        process.setCommand({storage->adbPath, {"shell", "cat", QString("/proc/%1/cmdline").arg(pid)}});
+    };
+    const auto onCatDone = [storage, pid](const Process &process, DoneWith result) {
+        if (result == DoneWith::Success) {
+            storage->runAs = process.stdOut();
+            if (!storage->runAs.isEmpty())
+                return true;
+            storage->errorMessage = QLatin1String("Cannot find User for process: ")
+                                    + QString::number(pid);
+        } else if (result == DoneWith::Error) {
+            storage->errorMessage = QLatin1String(" adb process exit code: ")
+                                    + QString::number(process.exitCode());
+            const QString adbError = process.errorString();
+            if (!adbError.isEmpty())
+                storage->errorMessage += QLatin1String(" adb process error: ") + adbError;
+        } else {
+            storage->errorMessage = QLatin1String("adb process timed out");
+        }
+        return false;
+    };
+
+    const auto onKillSetup = [storage, pid, signal](Process &process) {
+        process.setCommand({storage->adbPath, {"shell", "run-as", storage->runAs, "kill",
+                                               QString("-%1").arg(signal), QString::number(pid)}});
+    };
+    const auto onKillDone = [storage, pid](const Process &process, DoneWith result) {
+        if (result == DoneWith::Error) {
+            storage->errorMessage = QLatin1String("Cannot kill process: ") + QString::number(pid)
+                                    + process.stdErr();
+        } else if (result == DoneWith::Cancel) {
+            storage->errorMessage = QLatin1String("adb process timed out");
+        }
+    };
+
+    const auto onDone = [this, storage] { emit finished(storage->errorMessage); };
+
+    const Group recipe {
+        ProcessTask(onCatSetup, onCatDone).withTimeout(5s),
+        ProcessTask(onKillSetup, onKillDone).withTimeout(5s),
+        onGroupDone(onDone)
+    };
+    m_taskTreeRunner.start(recipe);
 }
 
 void AndroidSignalOperation::killProcess(qint64 pid)
@@ -114,5 +88,4 @@ void AndroidSignalOperation::interruptProcess(qint64 pid)
     signalOperationViaADB(pid, 2);
 }
 
-} // Internal
-} // Android
+} // namespace Android::Internal

src/plugins/android/androidsignaloperation.h

@@ -5,16 +5,13 @@
 
 #include <projectexplorer/devicesupport/idevice.h>
 
-#include <QObject>
-#include <QTimer>
+#include <solutions/tasking/tasktreerunner.h>
 
-namespace Android {
-namespace Internal {
+namespace Android::Internal {
 
 class AndroidSignalOperation : public ProjectExplorer::DeviceProcessSignalOperation
 {
 public:
-    ~AndroidSignalOperation() override;
     void killProcess(qint64 pid) override;
     void killProcess(const QString &filePath) override;
     void interruptProcess(qint64 pid) override;
@@ -23,32 +20,11 @@ protected:
     explicit AndroidSignalOperation();
 
 private:
-    enum State {
-        Idle,
-        RunAs,
-        Kill
-    };
-
-    using FinishHandler = std::function<void()>;
-
-    bool handleCrashMessage();
-    void adbFindRunAsFinished();
-    void adbKillFinished();
-    void handleTimeout();
-
     void signalOperationViaADB(qint64 pid, int signal);
-    void startAdbProcess(State state, const Utils::CommandLine &commandLine, FinishHandler handler);
 
-    Utils::FilePath m_adbPath;
-    std::unique_ptr<Utils::Process> m_adbProcess;
-    QTimer *m_timeout;
-
-    State m_state = Idle;
-    qint64 m_pid = 0;
-    int m_signal = 0;
+    Tasking::TaskTreeRunner m_taskTreeRunner;
 
     friend class AndroidDevice;
 };
 
-} // namespace Internal
-} // namespace Android
+} // namespace Android::Internal