Akonadi::AgentBase

#include <agentbase.h>

Inheritance diagram for Akonadi::AgentBase:

[legend]

Classes
class	Observer

class	ObserverV2

class	ObserverV3

class	ObserverV4

Public Types
enum	Status { Idle = 0 , Running , Broken , NotConfigured }

Signals
void	abortRequested ()

void	advancedStatus (const QVariantMap &status)

void	agentNameChanged (const QString &name)

void	configurationDialogAccepted ()

void	configurationDialogRejected ()

void	error (const QString &message)

void	onlineChanged (bool online)

void	percent (int progress)

void	reloadConfiguration ()

void	status (int status, const QString &message=QString())

void	warning (const QString &message)

Public Slots
virtual void	configure (WId windowId)

Public Member Functions
QString	agentName () const

virtual void	cleanup ()

QString	identifier () const

virtual int	progress () const

virtual QString	progressMessage () const

void	registerObserver (Observer *observer)

void	setAgentName (const QString &name)

virtual int	status () const

virtual QString	statusMessage () const

WId	winIdForDialogs () 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

Static Public Member Functions
template<typename T >
static int	init (int argc, char **argv)

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)

Protected Member Functions
	AgentBase (const QString &id)

	~AgentBase () override

virtual KAboutData	aboutData () const

virtual void	aboutToQuit ()

void	changeProcessed ()

ChangeRecorder *	changeRecorder () const

KSharedConfigPtr	config ()

virtual void	doSetOnline (bool online)

bool	isOnline () const

void	setNeedsNetwork (bool needsNetwork)

void	setOnline (bool state)

void	setTemporaryOffline (int makeOnlineInSeconds=300)

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)

Protected Member Functions inherited from QDBusContext
bool	calledFromDBus () const const

QDBusConnection	connection () const const

bool	isDelayedReply () const const

const QDBusMessage &	message () const const

void	sendErrorReply (const QString &name, const QString &msg) const const

void	sendErrorReply (QDBusError::ErrorType type, const QString &msg) const const

void	setDelayedReply (bool enable) const const

Additional Inherited Members
Properties inherited from QObject
	objectName

Public Attributes inherited from QObject
typedef	QObjectList

Detailed Description

The base class for all Akonadi agents and resources.

This class is a base class for all Akonadi agents, which covers the real agent processes and all resources.

It provides:

lifetime management
change monitoring and recording
configuration interface
problem reporting

Akonadi Server supports several ways to launch agents and resources:

As a separate application (
See also
AKONADI_AGENT_MAIN)
As a thread in the AgentServer
As a separate process, using the akonadi_agent_launcher

The idea is this, the agent or resource is written as a plugin instead of an executable (

See also: AgentFactory). In the AgentServer case, the AgentServer looks up the plugin and launches the agent in a separate thread. In the launcher case, a new akonadi_agent_launcher process is started for each agent or resource instance.

When making an Agent or Resource suitable for running in the AgentServer some extra caution is needed. Because multiple instances of several kinds of agents run in the same process, one cannot blindly use global objects like KGlobal. For this reasons several methods where added to avoid problems in this context, most notably AgentBase::config(). Additionally, one cannot use QDBusConnection::sessionBus() with dbus < 1.4, because of a multithreading bug in libdbus. Instead one should use QDBusConnection::sessionBus() which works around this problem.

Author: Till Adam adam@.nosp@m.kde..nosp@m.org, Volker Krause vkrau.nosp@m.se@k.nosp@m.de.or.nosp@m.g

Definition at line 72 of file agentbase.h.

Member Enumeration Documentation

◆ Status

enum Akonadi::AgentBase::Status

This enum describes the different states the agent can be in.

Enumerator
Idle	The agent does currently nothing.
Running	The agent is working on something.
Broken	The agent encountered an error state.
NotConfigured	The agent is lacking required configuration.

Definition at line 421 of file agentbase.h.

Constructor & Destructor Documentation

◆ AgentBase()

Akonadi::AgentBase::AgentBase ( const QString & id )

protected

Creates an agent base.

Parameters

id	The instance id of the agent.

◆ ~AgentBase()

Akonadi::AgentBase::~AgentBase ( )

overrideprotected

Destroys the agent base.

Member Function Documentation

◆ abortRequested

void Akonadi::AgentBase::abortRequested ( )

signal

Emitted when another application has remotely asked the agent to abort its current operation.

Connect to this signal if your agent supports abortion. After aborting and cleaning up, agents should return to Idle status.

Since: 4.4

◆ aboutData()

KAboutData AgentBase::aboutData ( ) const

protectedvirtual

Definition at line 1040 of file agentbase.cpp.

◆ aboutToQuit()

void AgentBase::aboutToQuit ( )

protectedvirtual

This method is called whenever the agent application is about to quit.

Reimplement this method to do session cleanup (e.g. disconnecting from groupware server).

Definition at line 1108 of file agentbase.cpp.

◆ advancedStatus

void Akonadi::AgentBase::advancedStatus ( const QVariantMap & status )

signal

This signal should be emitted whenever the status of the agent has been changed.

Parameters

status The object that describes the status change.

Since: 4.6

◆ agentName()

QString AgentBase::agentName ( ) const

Returns the name of the agent.

Since: 4.3

Definition at line 1234 of file agentbase.cpp.

◆ agentNameChanged

void Akonadi::AgentBase::agentNameChanged ( const QString & name )

signal

This signal is emitted whenever the name of the agent has changed.

Parameters

name	The new name of the agent.

Since: 4.3

◆ changeProcessed()

void AgentBase::changeProcessed ( )

protected

Marks the current change as processes and replays the next change if change recording is enabled (noop otherwise).

This method is called from the default implementation of the change notification slots. While not required when not using change recording, it is nevertheless recommended to call this method when done with processing a change notification.

Definition at line 1244 of file agentbase.cpp.

◆ changeRecorder()

ChangeRecorder * AgentBase::changeRecorder ( ) const

protected

Returns the Akonadi::ChangeRecorder object used for monitoring.

Use this to configure which parts you want to monitor.

Definition at line 1250 of file agentbase.cpp.

◆ cleanup()

void AgentBase::cleanup ( )

virtual

This method is called when the agent is removed from the system, so it can do some cleanup stuff.

Note: If you reimplement this in a subclass make sure to call this base implementation at the end.

Definition at line 1114 of file agentbase.cpp.

◆ config()

KSharedConfigPtr AgentBase::config ( )

protected

Returns the config object for this Agent.

Definition at line 1255 of file agentbase.cpp.

◆ configurationDialogAccepted

void Akonadi::AgentBase::configurationDialogAccepted ( )

signal

This signal is emitted whenever the user has accepted the configuration dialog.

Note: Implementors of agents/resources are responsible to emit this signal if the agent/resource reimplements configure().

Since: 4.4

◆ configurationDialogRejected

void Akonadi::AgentBase::configurationDialogRejected ( )

signal

This signal is emitted whenever the user has rejected the configuration dialog.

Note: Implementors of agents/resources are responsible to emit this signal if the agent/resource reimplements configure().

Since: 4.4

◆ configure

void AgentBase::configure ( WId windowId )

virtualslot

This method is called whenever the agent shall show its configuration dialog to the user.

It will be automatically called when the agent is started for the first time.

Parameters

windowId The parent window id.

Note: If the method is reimplemented it has to emit the configurationDialogAccepted() or configurationDialogRejected() signals depending on the users choice.

Definition at line 1050 of file agentbase.cpp.

◆ doSetOnline()

void AgentBase::doSetOnline ( bool online )

protectedvirtual

This method is called whenever the online status has changed.

Reimplement this method to react on online status changes.

Parameters

online online status

Reimplemented in Akonadi::ResourceBase.

Definition at line 1035 of file agentbase.cpp.

◆ error

void Akonadi::AgentBase::error ( const QString & message )

signal

This signal shall be used to report errors.

Parameters

message The i18n'ed error message.

◆ identifier()

QString AgentBase::identifier ( ) const

Returns the instance identifier of this agent.

Definition at line 1205 of file agentbase.cpp.

◆ init()

template<typename T >

int AgentBase::init	(	int	argc,
		char **	argv )

inlinestatic

Use this method in the main function of your agent application to initialize your agent subclass.

This method also takes care of creating a KApplication object and parsing command line arguments.

Note: In case the given class is also derived from AgentBase::Observer it gets registered as its own observer (see AgentBase::Observer), e.g. agentInstance->registerObserver( agentInstance );

class MyAgent : public AgentBase
{
  ...
};
 
AKONADI_AGENT_MAIN( MyAgent )

Parameters

argc	number of arguments
argv	arguments for the function

Definition at line 453 of file agentbase.h.

◆ isOnline()

bool AgentBase::isOnline ( ) const

protected

Returns whether the agent is currently online.

Definition at line 953 of file agentbase.cpp.

◆ onlineChanged

void Akonadi::AgentBase::onlineChanged ( bool online )

signal

Emitted when the online state changed.

Parameters

online The online state.

Since: 4.2

◆ percent

void Akonadi::AgentBase::percent ( int progress )

signal

This signal should be emitted whenever the progress of an action in the agent (e.g.

data transfer, connection establishment to remote server etc.) has changed.

Parameters

progress The progress of the action in percent.

◆ progress()

int AgentBase::progress ( ) const

virtual

This method returns the current progress of the agent in percentage.

Definition at line 939 of file agentbase.cpp.

◆ progressMessage()

QString AgentBase::progressMessage ( ) const

virtual

This method returns an i18n'ed description of the current progress.

Definition at line 946 of file agentbase.cpp.

◆ registerObserver()

void AgentBase::registerObserver ( Observer * observer )

Registers the given observer for reacting on monitored or recorded changes.

Parameters

observer The change handler to register. No ownership transfer, i.e. the caller stays owner of the pointer and can reset the registration by calling this method with 0

Definition at line 1159 of file agentbase.cpp.

◆ reloadConfiguration

void Akonadi::AgentBase::reloadConfiguration ( )

signal

Emitted if another application has changed the agent's configuration remotely and called AgentInstance::reconfigure().

Since: 4.2

◆ setAgentName()

void AgentBase::setAgentName ( const QString & name )

This method is used to set the name of the agent.

Since: 4.3

Parameters

name	name of the agent

Definition at line 1210 of file agentbase.cpp.

◆ setNeedsNetwork()

void AgentBase::setNeedsNetwork ( bool needsNetwork )

protected

Sets whether the agent needs network or not.

Since: 4.2

Todo: use this in combination with QNetworkConfiguration to change the onLine status of the agent.

Parameters

needsNetwork true if the agents needs network. Defaults to false

Definition at line 960 of file agentbase.cpp.

◆ setOnline()

void AgentBase::setOnline ( bool state )

protected

Sets whether the agent shall be online or not.

Definition at line 974 of file agentbase.cpp.

◆ setTemporaryOffline()

void AgentBase::setTemporaryOffline ( int makeOnlineInSeconds = 300 )

protected

Sets the agent offline but will make it online again after a given time.

Use this method when the agent detects some problem with its backend but it wants to retry all pending operations after some time - e.g. a server can not be reached currently

Example usage:

void ExampleResource::onItemRemovedFinished(KJob *job)
{
    if (job->error()) {
        Q_EMIT status(Broken, job->errorString());
        deferTask();
        setTemporaryOffline(300);
        return;
    }
    ...
}

Since: 4.13

Parameters

makeOnlineInSeconds timeout in seconds after which the agent changes to online

Definition at line 991 of file agentbase.cpp.

◆ status() [1/2]

int AgentBase::status ( ) const

virtual

This method returns the current status code of the agent.

The following return values are possible:

0 - Idle
1 - Running
2 - Broken
3 - NotConfigured

Definition at line 925 of file agentbase.cpp.

◆ status [2/2]

void Akonadi::AgentBase::status	(	int	status,
		const QString &	message = QString() )

signal

This signal should be emitted whenever the status of the agent has been changed.

Parameters

status	The new Status code.
message	A i18n'ed description of the new status.

◆ statusMessage()

QString AgentBase::statusMessage ( ) const

virtual

This method returns an i18n'ed description of the current status code.

Definition at line 932 of file agentbase.cpp.

◆ warning

void Akonadi::AgentBase::warning ( const QString & message )

signal

This signal shall be used to report warnings.

Parameters

message The i18n'ed warning message.

◆ winIdForDialogs()

WId AgentBase::winIdForDialogs ( ) const

This method returns the windows id, which should be used for dialogs.

Definition at line 1073 of file agentbase.cpp.

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::AgentBase

Classes

Public Types

Signals

Public Slots

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ Status

Constructor & Destructor Documentation

◆ AgentBase()

◆ ~AgentBase()

Member Function Documentation

◆ abortRequested

◆ aboutData()

◆ aboutToQuit()

◆ advancedStatus

◆ agentName()

◆ agentNameChanged

◆ changeProcessed()

◆ changeRecorder()

◆ cleanup()

◆ config()

◆ configurationDialogAccepted

◆ configurationDialogRejected

◆ configure

◆ doSetOnline()

◆ error

◆ identifier()

◆ init()

◆ isOnline()

◆ onlineChanged

◆ percent

◆ progress()

◆ progressMessage()

◆ registerObserver()

◆ reloadConfiguration

◆ setAgentName()

◆ setNeedsNetwork()

◆ setOnline()

◆ setTemporaryOffline()

◆ status() [1/2]

◆ status [2/2]

◆ statusMessage()

◆ warning

◆ winIdForDialogs()