Package com.vaadin.flow.server

Class DefaultErrorHandler

java.lang.Object

com.vaadin.flow.server.DefaultErrorHandler

All Implemented Interfaces:

ErrorHandler, Serializable

public class DefaultErrorHandler
extends Object
implements ErrorHandler

The default implementation of ErrorHandler. This implementation logs the exception at ERROR level, unless the exception is in the ignore list. By default, the following exceptions are ignored to prevent logs to be flooded by errors that are usually not raised by application logic, but are caused by external event, such as broken connections or network issues.

• java.net.SocketException
• java.net.SocketTimeoutException
• java.io.EOFException
• org.apache.catalina.connector.ClientAbortException
• org.eclipse.jetty.io.EofException

If the handler logger is set to DEBUG level, all exceptions are logged, despite they are in the ignore list.

Since:

1.0

Author:

Vaadin Ltd

See Also:

• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
	DefaultErrorHandler()
protected	DefaultErrorHandler(Set<String> ignoredExceptions)

Method Summary

Modifier and Type	Method	Description
void	error(ErrorEvent event)	Invoked when an error occurs.
static Throwable	findRelevantThrowable(Throwable t)	Vaadin wraps exceptions in its own and due to reflection usage there might be also other irrelevant exceptions that make no sense for Vaadin users (~developers using Vaadin).
protected boolean	shouldHandle(Throwable t)

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultErrorHandler

protected DefaultErrorHandler(Set<String> ignoredExceptions)

DefaultErrorHandler

public DefaultErrorHandler()

Method Details

error

public void error(ErrorEvent event)

Description copied from interface: ErrorHandler

Invoked when an error occurs.

Specified by:

error in interface ErrorHandler

Parameters:

event - the fired event.

shouldHandle

protected boolean shouldHandle(Throwable t)

findRelevantThrowable

public static Throwable findRelevantThrowable(Throwable t)

Vaadin wraps exceptions in its own and due to reflection usage there might be also other irrelevant exceptions that make no sense for Vaadin users (~developers using Vaadin). This method tries to choose the relevant one to be reported.

Parameters:

t - a throwable passed to ErrorHandler

Returns:

the throwable that is relevant for Vaadin users