Package org.jgrapes.webconlet.markdowndisplay

Class MarkdownDisplayConlet

java.lang.Object

org.jgrapes.core.internal.ComponentVertex

org.jgrapes.core.Component

org.jgrapes.webconsole.base.AbstractConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

org.jgrapes.webconsole.base.freemarker.FreeMarkerConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

org.jgrapes.webconlet.markdowndisplay.MarkdownDisplayConlet

All Implemented Interfaces:

Iterable<org.jgrapes.core.ComponentType>, org.jgrapes.core.Channel, org.jgrapes.core.ComponentType, org.jgrapes.core.Eligible, org.jgrapes.core.Manager

public class MarkdownDisplayConlet
extends FreeMarkerConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

A web console component used to display information to the user.

Instances may be used as a kind of note, i.e. created and configured by a user himself. A typical use case, however, is to create an instance during startup by a web console policy.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MarkdownDisplayConlet.MarkdownDisplayModel	The web console component’s model.

Nested classes/interfaces inherited from class org.jgrapes.webconsole.base.AbstractConlet

AbstractConlet.ConletTrackingInfo

Nested classes/interfaces inherited from interface org.jgrapes.core.Channel

org.jgrapes.core.Channel.Default

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CONLET_ID	Property for forcing a conlet id (used for singleton instances).
static final String	DELETABLE	Boolean property that controls if the preview is deletable.
static final String	EDITABLE_BY	Property of type Set<Principal> for restricting who can edit the content.
protected static final com.fasterxml.jackson.databind.ObjectMapper	mapper	The mapper.
static final String	PREVIEW_SOURCE	Property for setting the preview source.
static final String	TITLE	Property for setting a title.
static final String	VIEW_SOURCE	Property for setting the view source.

Fields inherited from class org.jgrapes.webconsole.base.AbstractConlet

TYPE_INSTANCE_SEPARATOR

Fields inherited from class org.jgrapes.core.Component

logger

Fields inherited from interface org.jgrapes.core.Channel

BROADCAST, SELF

Constructor Summary

Constructors

Constructor	Description
MarkdownDisplayConlet(org.jgrapes.core.Channel componentChannel)	Creates a new component with its channel set to the given channel.

Method Summary

Modifier and Type	Method	Description
protected Optional<MarkdownDisplayConlet.MarkdownDisplayModel>	createNewState(AddConletRequest event, ConsoleConnection session, String conletId)	Creates a new model for the conlet.
protected Optional<MarkdownDisplayConlet.MarkdownDisplayModel>	createStateRepresentation(org.jgrapes.core.Event<?> event, ConsoleConnection channel, String conletId)	Creates an instance of the type that represents the conlet’s state, initialized with default values.
protected void	doConletDeleted(ConletDeleted event, ConsoleConnection channel, String conletId, MarkdownDisplayConlet.MarkdownDisplayModel retrievedState)	Called by AbstractConlet.onConletDeleted(org.jgrapes.webconsole.base.events.ConletDeleted, org.jgrapes.webconsole.base.ConsoleConnection) to propagate the event to derived classes.
protected Set<Conlet.RenderMode>	doRenderConlet(RenderConletRequestBase<?> event, ConsoleConnection consoleConnection, String conletId, MarkdownDisplayConlet.MarkdownDisplayModel model)	Called by AbstractConlet.onAddConletRequest(AddConletRequest, ConsoleConnection) and AbstractConlet.onRenderConletRequest(RenderConletRequest, ConsoleConnection) to complete rendering the web console component.
protected void	doUpdateConletState(NotifyConletModel event, ConsoleConnection connection, MarkdownDisplayConlet.MarkdownDisplayModel conletState)	Called by AbstractConlet.onNotifyConletModel(org.jgrapes.webconsole.base.events.NotifyConletModel, org.jgrapes.webconsole.base.ConsoleConnection) to complete handling the notification.
protected String	generateInstanceId(AddConletRequest event, ConsoleConnection session)	Generates a new component instance id or uses the one stored in the event’s properties as CONLET_ID (see AddConletRequest.properties())
void	onConsoleReady(ConsoleReady event, ConsoleConnection connection)	On ConsoleReady, fire the AddConletType.
void	onUpdateConletModel(UpdateConletModel event, ConsoleConnection connection)	Stores the modified properties using a KeyValueStoreUpdate event and updates the view with a NotifyConletView.
protected Optional<MarkdownDisplayConlet.MarkdownDisplayModel>	recreateState(org.jgrapes.core.Event<?> event, ConsoleConnection channel, String conletId)	Called when a previously created conlet (with associated state) is rendered in a new browser session for the first time.

Methods inherited from class org.jgrapes.webconsole.base.freemarker.FreeMarkerConlet

doGetResource, fmConletModel, fmModel, fmModel, fmSessionModel, fmTypeModel, freemarkerConfig, processTemplate, processTemplate

Methods inherited from class org.jgrapes.webconsole.base.AbstractConlet

afterOnClosed, conletIds, conletIdsByConsoleConnection, conletViews, doRemoveConletType, doSetLocale, l10nBundles, localizations, onAddConletRequest, onClosed, onConletDeleted, onConletResourceRequest, onDetached, onNotifyConletModel, onRenderConletRequest, onSetLocale, putInSession, readContent, readContent, removeState, resourceBundle, setPeriodicRefresh, stateFromSession, statesFromSession, supportedLocales, trackConlet, trackedConnections, type, typeFromId

Methods inherited from class org.jgrapes.core.Component

channel, component, defaultCriterion, isEligibleFor, setName

Methods inherited from class org.jgrapes.core.internal.ComponentVertex

activeEventPipeline, addHandler, attach, channelReplacements, children, componentPath, componentVertex, detach, fire, initComponentsHandlers, iterator, name, newEventPipeline, newEventPipeline, parent, registerAsGenerator, root, toString, unregisterAsGenerator

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface org.jgrapes.core.Manager

stream

Field Details

mapper

protected static final com.fasterxml.jackson.databind.ObjectMapper mapper

The mapper.

CONLET_ID

public static final String CONLET_ID

Property for forcing a conlet id (used for singleton instances).

See Also:

• Constant Field Values

TITLE

public static final String TITLE

Property for setting a title.

See Also:

• Constant Field Values

PREVIEW_SOURCE

public static final String PREVIEW_SOURCE

Property for setting the preview source.

See Also:

• Constant Field Values

VIEW_SOURCE

public static final String VIEW_SOURCE

Property for setting the view source.

See Also:

• Constant Field Values

DELETABLE

public static final String DELETABLE

Boolean property that controls if the preview is deletable.

See Also:

• Constant Field Values

EDITABLE_BY

public static final String EDITABLE_BY

Property of type Set<Principal> for restricting who can edit the content.

See Also:

• Constant Field Values

Constructor Details

MarkdownDisplayConlet

public MarkdownDisplayConlet(org.jgrapes.core.Channel componentChannel)

Creates a new component with its channel set to the given channel.

Parameters:

componentChannel - the channel that the component’s handlers listen on by default and that Manager.fire(Event, Channel...) sends the event to

Method Details

onConsoleReady

@Handler
public void onConsoleReady(ConsoleReady event,
 ConsoleConnection connection)
                    throws freemarker.template.TemplateNotFoundException,
freemarker.template.MalformedTemplateNameException,
freemarker.core.ParseException,
IOException

On ConsoleReady, fire the AddConletType.

Parameters:

event - the event

connection - the console connection

Throws:

freemarker.template.TemplateNotFoundException - the template not found exception

freemarker.template.MalformedTemplateNameException - the malformed template name exception

freemarker.core.ParseException - the parse exception

IOException - Signals that an I/O exception has occurred.

generateInstanceId

protected String generateInstanceId(AddConletRequest event,
 ConsoleConnection session)

Generates a new component instance id or uses the one stored in the event’s properties as CONLET_ID (see AddConletRequest.properties())

Overrides:

generateInstanceId in class AbstractConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

Parameters:

event - the event that triggered the creation of a new conlet, which may contain required information (see AddConletRequest.properties())

session - the console connection; usually not required but provided as context

Returns:

the web console component id

createStateRepresentation

protected Optional<MarkdownDisplayConlet.MarkdownDisplayModel> createStateRepresentation(org.jgrapes.core.Event<?> event,
 ConsoleConnection channel,
 String conletId)
                                                                                  throws Exception

Description copied from class: AbstractConlet

Creates an instance of the type that represents the conlet’s state, initialized with default values.

The default implementation returns Optional.isEmpty(), thus indicating that no state information is needed or available.

This method should always be overridden if conlet instances have associated state.

Overrides:

createStateRepresentation in class AbstractConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

Parameters:

event - the event, which may contain required information (see AddConletRequest.properties())

channel - the console connection, sometimes required to send events to components that provide a backing store

conletId - the conlet id calculated as type() + TYPE_INSTANCE_SEPARATOR + generateInstanceId(...)

Returns:

the state representation or Optional.empty() if none is required

Throws:

Exception - if an exception occurs

createNewState

protected Optional<MarkdownDisplayConlet.MarkdownDisplayModel> createNewState(AddConletRequest event,
 ConsoleConnection session,
 String conletId)
                                                                       throws Exception

Creates a new model for the conlet.

The following properties are copied from the AddConletRequest event (see AddConletRequest.properties():

• CONLET_ID (String): The web console component id.

• TITLE (String): The web console component title.

• PREVIEW_SOURCE (String): The markdown source that is rendered in the web console component preview.

• VIEW_SOURCE (String): The markdown source that is rendered in the web console component view.

• DELETABLE (Boolean): Indicates that the web console component may be deleted from the overview page.

• EDITABLE_BY (Set<Principal>): The principals that may edit the web console component instance.

Overrides:

createNewState in class AbstractConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

Parameters:

event - the event

session - the console connection

conletId - the conlet id

Returns:

the state representation or Optional.empty() if none is required

Throws:

Exception - if an exception occurs

recreateState

protected Optional<MarkdownDisplayConlet.MarkdownDisplayModel> recreateState(org.jgrapes.core.Event<?> event,
 ConsoleConnection channel,
 String conletId)
                                                                      throws Exception

Description copied from class: AbstractConlet

Called when a previously created conlet (with associated state) is rendered in a new browser session for the first time.

The default implementation simply invokes createStateRepresentation and returns its result. Conlets with long-term state should retrieve their state from some storage. If state is returned, it is put in the browser session by the invoker.

Overrides:

recreateState in class AbstractConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

Parameters:

event - the event

channel - the console connection

conletId - the conlet id

Returns:

the state representation or Optional.empty() if none is required

Throws:

Exception - if an exception occurs

doRenderConlet

protected Set<Conlet.RenderMode> doRenderConlet(RenderConletRequestBase<?> event,
 ConsoleConnection consoleConnection,
 String conletId,
 MarkdownDisplayConlet.MarkdownDisplayModel model)
                                         throws Exception

Description copied from class: AbstractConlet

Called by AbstractConlet.onAddConletRequest(AddConletRequest, ConsoleConnection) and AbstractConlet.onRenderConletRequest(RenderConletRequest, ConsoleConnection) to complete rendering the web console component.

The

Specified by:

doRenderConlet in class AbstractConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

Parameters:

event - the event

consoleConnection - the channel

conletId - the component id

model - the conlet’s state; may be null if the conlet doesn’t have associated state information

Returns:

the rendered modes

Throws:

Exception - the exception

doConletDeleted

protected void doConletDeleted(ConletDeleted event,
 ConsoleConnection channel,
 String conletId,
 MarkdownDisplayConlet.MarkdownDisplayModel retrievedState)
                        throws Exception

Description copied from class: AbstractConlet

Called by AbstractConlet.onConletDeleted(org.jgrapes.webconsole.base.events.ConletDeleted, org.jgrapes.webconsole.base.ConsoleConnection) to propagate the event to derived classes.

Overrides:

doConletDeleted in class AbstractConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

Parameters:

event - the event

channel - the channel

conletId - the web console component id

retrievedState - the conlet’s state; may be null if the conlet doesn’t have associated state information

Throws:

Exception - if a problem occurs

doUpdateConletState

protected void doUpdateConletState(NotifyConletModel event,
 ConsoleConnection connection,
 MarkdownDisplayConlet.MarkdownDisplayModel conletState)
                            throws Exception

Description copied from class: AbstractConlet

Called by AbstractConlet.onNotifyConletModel(org.jgrapes.webconsole.base.events.NotifyConletModel, org.jgrapes.webconsole.base.ConsoleConnection) to complete handling the notification.

The default implementation does nothing.

Overrides:

doUpdateConletState in class AbstractConlet<MarkdownDisplayConlet.MarkdownDisplayModel>

Parameters:

event - the event

connection - the channel

conletState - the conlet’s state; may be null if the conlet doesn’t have associated state information

Throws:

Exception

onUpdateConletModel

@Handler
public void onUpdateConletModel(UpdateConletModel event,
 ConsoleConnection connection)

Stores the modified properties using a KeyValueStoreUpdate event and updates the view with a NotifyConletView.

Parameters:

event - the event

connection - the console connection