org.apache.commons.lang3.exception

Interface ExceptionContext

All Known Implementing Classes:

ContextedException, ContextedRuntimeException, DefaultExceptionContext

public interface ExceptionContext

Allows the storage and retrieval of contextual information based on label-value pairs for exceptions.

Implementations are expected to manage the pairs in a list-style collection that keeps the pairs in the sequence of their addition.

Since:

3.0

See Also:

ContextedException, ContextedRuntimeException

Method Summary

Modifier and Type	Method and Description
ExceptionContext	addContextValue(String label, Object value) Adds a contextual label-value pair into this context.
List<Pair<String,Object>>	getContextEntries() Retrieves the full list of label-value pairs defined in the contextual data.
Set<String>	getContextLabels() Retrieves the full set of labels defined in the contextual data.
List<Object>	getContextValues(String label) Retrieves all the contextual data values associated with the label.
Object	getFirstContextValue(String label) Retrieves the first available contextual data value associated with the label.
String	getFormattedExceptionMessage(String baseMessage) Gets the contextualized error message based on a base message.
ExceptionContext	setContextValue(String label, Object value) Sets a contextual label-value pair into this context.

Method Detail

addContextValue

ExceptionContext addContextValue(String label,
                                 Object value)

Adds a contextual label-value pair into this context.

The pair will be added to the context, independently of an already existing pair with the same label.

Parameters:

label - the label of the item to add, null not recommended

value - the value of item to add, may be null

Returns:

this, for method chaining, not null

setContextValue

ExceptionContext setContextValue(String label,
                                 Object value)

Sets a contextual label-value pair into this context.

The pair will be added normally, but any existing label-value pair with the same label is removed from the context.

Parameters:

label - the label of the item to add, null not recommended

value - the value of item to add, may be null

Returns:

this, for method chaining, not null

getContextValues

List<Object> getContextValues(String label)

Retrieves all the contextual data values associated with the label.

Parameters:

label - the label to get the contextual values for, may be null

Returns:

the contextual values associated with the label, never null

getFirstContextValue

Object getFirstContextValue(String label)

Retrieves the first available contextual data value associated with the label.

Parameters:

label - the label to get the contextual value for, may be null

Returns:

the first contextual value associated with the label, may be null

getContextLabels

Set<String> getContextLabels()

Retrieves the full set of labels defined in the contextual data.

Returns:

the set of labels, not null

getContextEntries

List<Pair<String,Object>> getContextEntries()

Retrieves the full list of label-value pairs defined in the contextual data.

Returns:

the list of pairs, not null

getFormattedExceptionMessage

String getFormattedExceptionMessage(String baseMessage)

Gets the contextualized error message based on a base message. This will add the context label-value pairs to the message.

Parameters:

baseMessage - the base exception message without context information appended

Returns:

the exception message with context information appended, not null