Akonadi::ItemSync

#include <itemsync.h>

Inheritance diagram for Akonadi::ItemSync:

[legend]

Public Types
enum	MergeMode { RIDMerge , GIDMerge }

enum	TransactionMode { SingleTransaction , MultipleTransactions , NoTransaction }

Public Types inherited from Akonadi::Job
enum	Error { ConnectionFailed = UserDefinedError , ProtocolVersionMismatch , UserCanceled , Unknown , UserError = UserDefinedError + 42 }

using	List = QList<Job *>

Public Types inherited from KJob
typedef QFlags< Capability >	Capabilities

enum	Capability

enum	Unit

Public Types inherited from QObject
typedef	QObjectList

Signals
void	readyForNextBatch (int remainingBatchSize)

void	transactionCommitted ()

Signals inherited from Akonadi::Job
void	aboutToStart (Akonadi::Job *job)

void	writeFinished (Akonadi::Job *job)

Signals inherited from KJob
void	description (KJob *job, const QString &title, const QPair< QString, QString > &field1=QPair< QString, QString >(), const QPair< QString, QString > &field2=QPair< QString, QString >())

void	finished (KJob *job)

void	infoMessage (KJob *job, const QString &message)

void	percentChanged (KJob *job, unsigned long percent)

void	processedAmountChanged (KJob *job, KJob::Unit unit, qulonglong amount)

void	processedSize (KJob *job, qulonglong size)

void	result (KJob *job)

void	resumed (KJob *job)

void	speed (KJob *job, unsigned long speed)

void	suspended (KJob *job)

void	totalAmountChanged (KJob *job, KJob::Unit unit, qulonglong amount)

void	totalSize (KJob *job, qulonglong size)

void	warning (KJob *job, const QString &message)

Public Member Functions
	ItemSync (const Collection &collection, const QDateTime &timestamp={}, QObject *parent=nullptr)

	~ItemSync () override

int	batchSize () const

void	deliveryDone ()

MergeMode	mergeMode () const

void	rollback ()

void	setBatchSize (int)

void	setDisableAutomaticDeliveryDone (bool disable)

void	setFullSyncItems (const Item::List &items)

void	setIncrementalSyncItems (const Item::List &changedItems, const Item::List &removedItems)

void	setMergeMode (MergeMode mergeMode)

void	setStreamingEnabled (bool enable)

void	setTotalItems (int amount)

void	setTransactionMode (TransactionMode mode)

Public Member Functions inherited from Akonadi::Job
	Job (QObject *parent=nullptr)

	~Job () override

QString	errorString () const final

void	start () override

Public Member Functions inherited from KCompositeJob
	KCompositeJob (QObject *parent=nullptr)

Public Member Functions inherited from KJob
	KJob (QObject *parent=nullptr)

Capabilities	capabilities () const

qint64	elapsedTime () const

int	error () const

QString	errorText () const

bool	exec ()

bool	isAutoDelete () const

bool	isFinishedNotificationHidden () const

bool	isStartedWithExec () const

bool	isSuspended () const

unsigned long	percent () const

Q_SCRIPTABLE qulonglong	processedAmount (Unit unit) const

void	setAutoDelete (bool autodelete)

void	setFinishedNotificationHidden (bool hide=true)

void	setUiDelegate (KJobUiDelegate *delegate)

Q_SCRIPTABLE qulonglong	totalAmount (Unit unit) const

KJobUiDelegate *	uiDelegate () const

Public Member Functions inherited from QObject
	QObject (QObject *parent)

QBindable< QString >	bindableObjectName ()

bool	blockSignals (bool block)

const QObjectList &	children () const const

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const const

void	deleteLater ()

void	destroyed (QObject *obj)

bool	disconnect (const char signal, const QObject receiver, const char *method) const const

bool	disconnect (const QObject receiver, const char method) const const

void	dumpObjectInfo () const const

void	dumpObjectTree () const const

QList< QByteArray >	dynamicPropertyNames () const const

virtual bool	event (QEvent *e)

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (Qt::FindChildOptions options) const const

bool	inherits (const char *className) const const

void	installEventFilter (QObject *filterObj)

bool	isQuickItemType () const const

bool	isWidgetType () const const

bool	isWindowType () const const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const const

void	moveToThread (QThread *targetThread)

QString	objectName () const const

void	objectNameChanged (const QString &objectName)

QObject *	parent () const const

QVariant	property (const char *name) const const

	Q_CLASSINFO (Name, Value)

	Q_EMIT Q_EMIT

	Q_ENUM (...)

	Q_ENUM_NS (...)

	Q_ENUMS (...)

	Q_FLAG (...)

	Q_FLAG_NS (...)

	Q_FLAGS (...)

	Q_GADGET Q_GADGET

	Q_GADGET_EXPORT (EXPORT_MACRO)

	Q_INTERFACES (...)

	Q_INVOKABLE Q_INVOKABLE

	Q_MOC_INCLUDE Q_MOC_INCLUDE

	Q_NAMESPACE Q_NAMESPACE

	Q_NAMESPACE_EXPORT (EXPORT_MACRO)

	Q_OBJECT Q_OBJECT

	Q_PROPERTY (...)

	Q_REVISION Q_REVISION

	Q_SET_OBJECT_NAME (Object)

	Q_SIGNAL Q_SIGNAL

	Q_SIGNALS Q_SIGNALS

	Q_SLOT Q_SLOT

	Q_SLOTS Q_SLOTS

T	qobject_cast (const QObject *object)

T	qobject_cast (QObject *object)

	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setObjectName (QAnyStringView name)

void	setParent (QObject *parent)

bool	setProperty (const char *name, const QVariant &value)

bool	setProperty (const char *name, QVariant &&value)

bool	signalsBlocked () const const

int	startTimer (int interval, Qt::TimerType timerType)

int	startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType)

QThread *	thread () const const

Protected Member Functions
void	doStart () override

void	slotResult (KJob *job) override

Protected Member Functions inherited from Akonadi::Job
bool	addSubjob (KJob *job) override

virtual bool	doHandleResponse (qint64 tag, const Protocol::CommandPtr &response)

bool	doKill () override

void	emitWriteFinished ()

bool	removeSubjob (KJob *job) override

Protected Member Functions inherited from KCompositeJob
void	clearSubjobs ()

bool	hasSubjobs () const

const QList< KJob * > &	subjobs () const

Protected Member Functions inherited from KJob
virtual bool	doResume ()

virtual bool	doSuspend ()

void	emitPercent (qulonglong processedAmount, qulonglong totalAmount)

void	emitResult ()

void	emitSpeed (unsigned long speed)

bool	isFinished () const

void	setCapabilities (Capabilities capabilities)

void	setError (int errorCode)

void	setErrorText (const QString &errorText)

void	setPercent (unsigned long percentage)

void	setProcessedAmount (Unit unit, qulonglong amount)

void	setProgressUnit (Unit unit)

void	setTotalAmount (Unit unit, qulonglong amount)

void	startElapsedTimer ()

Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signal)

bool	isSignalConnected (const QMetaMethod &signal) const const

int	receivers (const char *signal) const const

QObject *	sender () const const

int	senderSignalIndex () const const

virtual void	timerEvent (QTimerEvent *event)

Additional Inherited Members
Properties inherited from QObject
	objectName

Public Slots inherited from KJob
bool	kill (KJob::KillVerbosity verbosity=KJob::Quietly)

bool	resume ()

bool	suspend ()

Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject context, Functor functor, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)

bool	disconnect (const QMetaObject::Connection &connection)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

bool	disconnect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method)

QString	tr (const char sourceText, const char disambiguation, int n)

Public Attributes inherited from KJob
	Bytes

	Directories

	Files

	Items

	Killable

	NoCapabilities

	Suspendable

	UnitsCount

Protected Slots inherited from Akonadi::Job
void	slotResult (KJob *job) override

Protected Slots inherited from KCompositeJob
virtual void	slotInfoMessage (KJob *job, const QString &message)

Detailed Description

Syncs between items known to a client (usually a resource) and the Akonadi storage.

Remote Id must only be set by the resource storing the item, other clients should leave it empty, since the resource responsible for the target collection will be notified about the addition and then create a suitable remote Id.

There are two different forms of ItemSync usage:

Full-Sync: meaning the client provides all valid items, i.e. any item not part of the list but currently stored in Akonadi will be removed
Incremental-Sync: meaning the client provides two lists, one for items which are new or modified and one for items which should be removed. Any item not part of either list but currently stored in Akonadi will not be changed.

Note: This is provided for convenience to implement "save all" like behavior, however it is strongly recommended to use single item jobs whenever possible, e.g. ItemCreateJob, ItemModifyJob and ItemDeleteJob

Author: Tobias Koenig tokoe.nosp@m.@kde.nosp@m..org

Definition at line 40 of file itemsync.h.

Member Enumeration Documentation

◆ MergeMode

enum Akonadi::ItemSync::MergeMode

Definition at line 45 of file itemsync.h.

◆ TransactionMode

enum Akonadi::ItemSync::TransactionMode

Transaction mode used by ItemSync.

Since: 4.6

Enumerator
SingleTransaction	Use a single transaction for the entire sync process (default), provides maximum consistency ("all or nothing") and best performance.
MultipleTransactions	Use one transaction per chunk of delivered items, good compromise between the other two when using streaming.
NoTransaction	Use no transaction at all, provides highest responsiveness (might therefore feel faster even when actually taking slightly longer), no consistency guaranteed (can fail anywhere in the sync process)

Definition at line 129 of file itemsync.h.

Constructor & Destructor Documentation

◆ ItemSync()

ItemSync::ItemSync	(	const Collection &	collection,
		const QDateTime &	timestamp = {},
		QObject *	parent = nullptr )

explicit

Creates a new item synchronizer.

Parameters

collection	The collection we are syncing.
timestamp	Optional timestamp of itemsync start. Will be used to detect local changes that happen while the ItemSync is running.
parent	The parent object.

Definition at line 183 of file itemsync.cpp.

◆ ~ItemSync()

ItemSync::~ItemSync ( )

override

Destroys the item synchronizer.

Definition at line 194 of file itemsync.cpp.

Member Function Documentation

◆ batchSize()

int ItemSync::batchSize ( ) const

nodiscard

Minimum number of items required to start processing in streaming mode.

When MultipleTransactions is used, one transaction per batch will be created.

See also: setBatchSize()

Since: 4.14

Definition at line 533 of file itemsync.cpp.

◆ deliveryDone()

void ItemSync::deliveryDone ( )

Notify ItemSync that all remote items have been delivered.

Only call this in streaming mode.

Definition at line 491 of file itemsync.cpp.

◆ doStart()

void ItemSync::doStart ( )

overrideprotectedvirtual

This method must be reimplemented in the concrete jobs.

It will be called after the job has been started and a connection to the Akonadi backend has been established.

Implements Akonadi::Job.

Definition at line 269 of file itemsync.cpp.

◆ mergeMode()

ItemSync::MergeMode ItemSync::mergeMode ( ) const

nodiscard

Returns current merge mode.

See also: setMergeMode()

Since: 5.1

Definition at line 545 of file itemsync.cpp.

◆ readyForNextBatch

void Akonadi::ItemSync::readyForNextBatch ( int remainingBatchSize )

signal

Signals the resource that new items can be delivered.

Parameters

remainingBatchSize the number of items required to complete the batch (typically the same as batchSize())

Since: 4.14

◆ rollback()

void ItemSync::rollback ( )

Aborts the sync process and rolls back all not yet committed transactions.

Use this if an external error occurred during the sync process (such as the user canceling it).

Since: 4.5

Definition at line 515 of file itemsync.cpp.

◆ setBatchSize()

void ItemSync::setBatchSize ( int size )

Set the batch size.

The default is 10.

Note: You must call this method before starting the sync, changes afterwards lead to undefined results.

See also: batchSize()

Since: 4.14

Definition at line 539 of file itemsync.cpp.

◆ setDisableAutomaticDeliveryDone()

void ItemSync::setDisableAutomaticDeliveryDone ( bool disable )

Disables the automatic completion of the item sync, based on the number of delivered items.

This ensures that the item sync only finishes once deliveryDone() is called, while still making it possible to use the progress reporting of the ItemSync.

Note: You must call this method before starting the sync, changes afterwards lead to undefined results.

See also: setTotalItems

Since: 4.14

Definition at line 238 of file itemsync.cpp.

◆ setFullSyncItems()

void ItemSync::setFullSyncItems ( const Item::List & items )

Sets the full item list for the collection.

Usually the result of a full item listing.

Warning: If the client using this is a resource, all items must have a valid remote identifier.

Parameters

items A list of items.

Definition at line 198 of file itemsync.cpp.

◆ setIncrementalSyncItems()

void ItemSync::setIncrementalSyncItems	(	const Item::List &	changedItems,
		const Item::List &	removedItems )

Sets the item lists for incrementally syncing the collection.

Usually the result of an incremental remote item listing.

Warning: If the client using this is a resource, all items must have a valid remote identifier.

Parameters

changedItems	A list of items added or changed by the client.
removedItems	A list of items deleted by the client.

Definition at line 244 of file itemsync.cpp.

◆ setMergeMode()

void ItemSync::setMergeMode ( MergeMode mergeMode )

Set what merge method should be used for next ItemSync run.

By default ItemSync uses RIDMerge method.

See ItemCreateJob for details on Item merging.

Note: You must call this method before starting the sync, changes afterwards lead to undefined results.

See also: mergeMode

Since: 4.14.11

Definition at line 551 of file itemsync.cpp.

◆ setStreamingEnabled()

void ItemSync::setStreamingEnabled ( bool enable )

Enable item streaming.

Item streaming means that the items delivered by setXItems() calls are delivered in chunks and you manually indicate when all items have been delivered by calling deliveryDone().

Parameters

enable true to enable item streaming

Definition at line 485 of file itemsync.cpp.

◆ setTotalItems()

void ItemSync::setTotalItems ( int amount )

Set the amount of items which you are going to return in total by using the setFullSyncItems()/setIncrementalSyncItems() methods.

Warning: By default the item sync will automatically end once sufficient items have been provided. To disable this use setDisableAutomaticDeliveryDone

See also: setDisableAutomaticDeliveryDone

Parameters

amount The amount of items in total.

Definition at line 223 of file itemsync.cpp.

◆ setTransactionMode()

void ItemSync::setTransactionMode ( ItemSync::TransactionMode mode )

Set the transaction mode to use for this sync.

Note: You must call this method before starting the sync, changes afterwards lead to undefined results.

Parameters

mode	the transaction mode to use

Since: 4.6

Definition at line 527 of file itemsync.cpp.

◆ slotResult()

void ItemSync::slotResult ( KJob * job )

overrideprotectedvirtual

Reimplemented from KCompositeJob.

Definition at line 499 of file itemsync.cpp.

◆ transactionCommitted

void Akonadi::ItemSync::transactionCommitted ( )

signal

Emitted whenever a transaction is committed. This is for testing only.

Since: 4.14

The documentation for this class was generated from the following files:

KDE's Doxygen guidelines are available online.

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About Akonadi

Akonadi::ItemSync

Public Types

Signals

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ MergeMode

◆ TransactionMode

Constructor & Destructor Documentation

◆ ItemSync()

◆ ~ItemSync()

Member Function Documentation

◆ batchSize()

◆ deliveryDone()

◆ doStart()

◆ mergeMode()

◆ readyForNextBatch

◆ rollback()

◆ setBatchSize()

◆ setDisableAutomaticDeliveryDone()

◆ setFullSyncItems()

◆ setIncrementalSyncItems()

◆ setMergeMode()

◆ setStreamingEnabled()

◆ setTotalItems()

◆ setTransactionMode()

◆ slotResult()

◆ transactionCommitted