Package org.jgrapes.webconlet.logviewer

Class LogViewerConlet

java.lang.Object

org.jgrapes.core.internal.ComponentVertex

org.jgrapes.core.Component

org.jgrapes.webconsole.base.AbstractConlet<S>

org.jgrapes.webconsole.base.freemarker.FreeMarkerConlet<Serializable>

org.jgrapes.webconlet.logviewer.LogViewerConlet

All Implemented Interfaces:

Iterable<ComponentType>, Channel, ComponentType, Eligible, Manager

public class LogViewerConlet
extends FreeMarkerConlet<Serializable>

A conlet for displaying records from java.util.logging.

The class LogViewerHandler has to be registered as a handler in the logging configuration (e.g. with -Djava.util.logging.config.file=logging.properties and logging.properties:

org.jgrapes.webconlet.logviewer.LogViewerHandler.level=CONFIG

The handler implements a ring buffer for the last 100 LogRecords. When the conlet is displayed, it obtains the initially shown messages from the ring buffer. All subsequently published LogRecords are forwarded to the conlet. In order to limit the memory required in the browser, the conlet also retains only the 100 most recent messages.

Nested Class Summary

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

AbstractConlet.ConletTrackingInfo

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

Channel.Default

Field Summary

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

TYPE_INSTANCE_SEPARATOR

Fields inherited from interface org.jgrapes.core.Channel

BROADCAST, SELF

Constructor Summary

Constructors

Constructor	Description
LogViewerConlet(Channel componentChannel)	Creates a new component with its channel set to the given channel.

Method Summary

Modifier and Type	Method	Description
protected Set<Conlet.RenderMode>	doRenderConlet(RenderConletRequestBase<?> event, ConsoleConnection channel, String conletId, Serializable conletState)	Called by AbstractConlet.onAddConletRequest(AddConletRequest, ConsoleConnection) and AbstractConlet.onRenderConletRequest(RenderConletRequest, ConsoleConnection) to complete rendering the web console component.
protected boolean	doSetLocale(SetLocale event, ConsoleConnection channel, String conletId)	Called by AbstractConlet.onSetLocale(SetLocale, ConsoleConnection) for each web console component in the console connection.
protected void	doUpdateConletState(NotifyConletModel event, ConsoleConnection channel, Serializable conletState)	Called by AbstractConlet.onNotifyConletModel(org.jgrapes.webconsole.base.events.NotifyConletModel, org.jgrapes.webconsole.base.ConsoleConnection) to complete handling the notification.
void	onConsoleReady(ConsoleReady event, ConsoleConnection channel)	On ConsoleReady, fire the AddConletType.

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

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

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

afterOnClosed, conletIds, conletIdsByConsoleConnection, conletViews, createNewState, createStateRepresentation, doConletDeleted, doRemoveConletType, generateInstanceId, l10nBundles, localizations, onAddConletRequest, onClosed, onConletDeleted, onConletResourceRequest, onDetached, onNotifyConletModel, onRenderConletRequest, onSetLocale, putInSession, readContent, readContent, recreateState, removeState, resourceBundle, setPeriodicRefresh, stateFromSession, statesFromSession, supportedLocales, trackConlet, trackedConnections, type

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, 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

Constructor Details

LogViewerConlet

public LogViewerConlet(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 channel)
                    throws TemplateNotFoundException,
MalformedTemplateNameException,
ParseException,
IOException

On ConsoleReady, fire the AddConletType.

Parameters:

event - the event

channel - the channel

Throws:

TemplateNotFoundException - the template not found exception

MalformedTemplateNameException - the malformed template name exception

ParseException - the parse exception

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

doRenderConlet

protected Set<Conlet.RenderMode> doRenderConlet(RenderConletRequestBase<?> event,
 ConsoleConnection channel,
 String conletId,
 Serializable conletState)
                                         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<Serializable>

Parameters:

event - the event

channel - the channel

conletId - the component id

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

Returns:

the rendered modes

Throws:

Exception - the exception

doUpdateConletState

protected void doUpdateConletState(NotifyConletModel event,
 ConsoleConnection channel,
 Serializable 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<Serializable>

Parameters:

event - the event

channel - the channel

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

Throws:

Exception

doSetLocale

protected boolean doSetLocale(SetLocale event,
 ConsoleConnection channel,
 String conletId)
                       throws Exception

Description copied from class: AbstractConlet

Called by AbstractConlet.onSetLocale(SetLocale, ConsoleConnection) for each web console component in the console connection.

Derived classes must send events for updating the representation to match the new locale.

If the method returns false this indicates that the representation cannot be updated without reloading the web console page.

The default implementation fires a RenderConletRequest with tracked render modes (one of or both Conlet.RenderMode.Preview and Conlet.RenderMode.View), thus updating the known representations. (Assuming that “Edit” and “Help” modes are represented with modal dialogs and therefore locale changes aren’t possible while these are open.)

Overrides:

doSetLocale in class AbstractConlet<Serializable>

Parameters:

event - the event

channel - the channel

conletId - the web console component id

Returns:

true, if adaption to new locale without reload is possible

Throws:

Exception - the exception