Package org.jgrapes.core.events

Class Error

java.lang.Object

org.jgrapes.core.internal.EventBase<Void>

org.jgrapes.core.Event<Void>

org.jgrapes.core.events.Error

All Implemented Interfaces:

Future<Void>, Associator, Eligible

Direct Known Subclasses:

HandlingError, HostUnresolved, IOError, JsonParsingError

public class Error
extends Event<Void>

This event signals that an error occurred while processing an event.

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.concurrent.Future

Future.State

Field Summary

Fields inherited from class org.jgrapes.core.internal.EventBase

completed, completionEvents, invokedFor

Constructor Summary

Constructors

Constructor	Description
Error(Event<?> event, String message)	Creates a new event.
Error(Event<?> event, String message, Throwable throwable)	Creates a new event caused by the given throwable.
Error(Event<?> event, Throwable throwable)	Creates a new event caused by the given throwable.
Error(Error event)	Creates a new event as a copy of an existing event.

Method Summary

Modifier and Type	Method	Description
static <T extends Error> T	duplicate(T event)	Duplicate the event.
Event<?>	event()	Returns the event that was handled when the problem occurred.
String	message()	Returns the message passed to the constructor.
Throwable	throwable()	Returns the throwable that caused the problem.
String	toString()

Methods inherited from class org.jgrapes.core.Event

addCompletionEvent, associated, cancel, channels, channels, completionEvents, currentResults, defaultCriterion, forChannels, get, get, handled, handlingError, isCancelled, isDone, isEligibleFor, isStopped, processedBy, results, results, resumeHandling, setAssociated, setChannels, setRequiresResult, setResult, stop, suspendHandling, suspendHandling, tieTo

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

disableTracking, enqueued, firstResultAssigned, isTracked, onCompletion

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jgrapes.core.Associator

associated, associated, associated, associatedGet

Methods inherited from interface java.util.concurrent.Future

exceptionNow, resultNow, state

Constructor Details

Error

public Error(Error event)

Creates a new event as a copy of an existing event.

Useful for forwarding an event. Constructors “<T extend Error> T(T event)” must be implemented by all derived classes.

Parameters:

event - the event to copy

Error

public Error(Event<?> event,
 String message)

Creates a new event.

Parameters:

event - the event being processed when the problem occurred

message - the message

Error

public Error(Event<?> event,
 String message,
 Throwable throwable)

Creates a new event caused by the given throwable.

Parameters:

event - the event being processed when the problem occurred

message - the message

throwable - the throwable

Error

public Error(Event<?> event,
 Throwable throwable)

Creates a new event caused by the given throwable.

The message is initialized from the throwable.

Parameters:

event - the event being processed when the problem occurred

throwable - the throwable

Method Details

duplicate

public static <T extends Error> T duplicate(T event)

Duplicate the event.

Returns a new event with the same class and the same properties of the given event. Relies on the proper implementation of constructors “<T extend Error> T(T event)” for derived classes.

Creating a duplicate id useful for forwarding a derived Error while handling a base class.

Type Parameters:

T - the generic type

Parameters:

event - the event

Returns:

the t

event

public Event<?> event()

Returns the event that was handled when the problem occurred.

Returns:

the event

message

public String message()

Returns the message passed to the constructor.

Returns:

the message

throwable

public Throwable throwable()

Returns the throwable that caused the problem.

Returns:

the throwable or null if the problem wasn’t caused by a throwable.

toString

public String toString()

Overrides:

toString in class Event<Void>