ConcurrentOperationRunner Class

class QInstaller::ConcurrentOperationRunner

The ConcurrentOperationRunner class can be used to perform installer operations concurrently. More...

Header: #include <ConcurrentOperationRunner>
Inherits: QObject

Public Functions

ConcurrentOperationRunner(QInstaller::OperationList *operations, const Operation::OperationType type, QObject *parent = nullptr)
ConcurrentOperationRunner(QObject *parent = nullptr)
virtual ~ConcurrentOperationRunner()
QHash<QInstaller::Operation *, bool> run()
void setMaxThreadCount(int count)
void setOperations(QInstaller::OperationList *operations)
void setType(const Operation::OperationType type)

Public Slots

void cancel()


void finished()
void operationStarted(QInstaller::Operation *operation)
void progressChanged(const int completed, const int total)

Detailed Description

The class accepts an operation list of any registered operation type. It can be used to execute the Backup, Perform, or Undo steps of the operations. The operations are run in a separate thread pool of this class, which by default limits the maximum number of threads to the ideal number of logical processor cores in the system.

Member Function Documentation

ConcurrentOperationRunner::ConcurrentOperationRunner(QInstaller::OperationList *operations, const Operation::OperationType type, QObject *parent = nullptr)

Constructs an operation runner with operations of type type to be performed, and parent as the parent object.

ConcurrentOperationRunner::ConcurrentOperationRunner(QObject *parent = nullptr)

Constructs an operation runner with parent as the parent object.

[slot] void ConcurrentOperationRunner::cancel()

Cancels operations pending for an asynchronous run.

Note: This does not stop already running operations, which should provide a separate mechanism for canceling.

[signal] void ConcurrentOperationRunner::finished()

Emitted when the execution of all pooled operations is finished.

[signal] void ConcurrentOperationRunner::operationStarted(QInstaller::Operation *operation)

Emitted when the execution of operation is started.

[signal] void ConcurrentOperationRunner::progressChanged(const int completed, const int total)

Emitted when the count of completed of the total operations changes.

[virtual] ConcurrentOperationRunner::~ConcurrentOperationRunner()

Destroys the instance and releases resources.

QHash<QInstaller::Operation *, bool> ConcurrentOperationRunner::run()

Performs the current operations. Returns a hash of pointers to the performed operation objects and their results. The result is a boolean value.

void ConcurrentOperationRunner::setMaxThreadCount(int count)

Sets the maximum count of threads used by the thread pool of this class. A value of 0 sets the count automatically to ideal number of threads.

void ConcurrentOperationRunner::setOperations(QInstaller::OperationList *operations)

Sets the list of operations to be performed to operations.

void ConcurrentOperationRunner::setType(const Operation::OperationType type)

Sets type of operations to be performed. This can be either Backup, Perform, or Undo.

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