mx.logging

# AbstractTarget - AS3 Flex

Package | mx.logging
Class | public class AbstractTarget
Inheritance | AbstractTarget Object
Implements | ILoggingTarget, IMXMLObject
Subclasses | LineFormattedTarget

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

This class provides the basic functionality required by the logging framework for a target implementation. It handles the validation of filter expressions and provides a default level property. No implementation of the `logEvent()` method is provided.

Public Properties
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| Property | Defined By
--- | --- | ---
|  | constructor : Object A reference to the class object or constructor function for a given object instance. | Object
|  | filters : Array In addition to the level setting, filters are used to provide a psuedo-hierarchical mapping for processing only those events for a given category. | AbstractTarget
|  | id : String [read-only] Provides access to the id of this target. | AbstractTarget
|  | level : int Provides access to the level this target is currently set at. | AbstractTarget

Public Methods
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| Method | Defined By
--- | --- | ---
|  | AbstractTarget() Constructor. | AbstractTarget
|  | addLogger(logger:ILogger):void Sets up this target with the specified logger. | AbstractTarget
|  | hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined. | Object
|  | initialized(document:Object, id:String):void Called after the implementing object has been created and all properties specified on the tag have been assigned. | AbstractTarget
|  | isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter. | Object
|  | logEvent(event:LogEvent):void This method handles a LogEvent from an associated logger. | AbstractTarget
|  | propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable. | Object
|  | removeLogger(logger:ILogger):void Stops this target from receiving events from the specified logger. | AbstractTarget
|  | setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations. | Object
|  | toLocaleString():String Returns the string representation of this object, formatted according to locale-specific conventions. | Object
|  | toString():String Returns the string representation of the specified object. | Object
|  | valueOf():Object Returns the primitive value of the specified object. | Object

Property Detail

### filters

property

`filters:Array`

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

In addition to the `level` setting, filters are used to provide a psuedo-hierarchical mapping for processing only those events for a given category.

Each logger belongs to a category. By convention these categories map to the fully-qualified class name in which the logger is used. For example, a logger that is logging messages for the `mx.rpc.soap.WebService` class, uses "mx.rpc.soap.WebService" as the parameter to the `Log.getLogger()` method call. When messages are sent under this category only those targets that have a filter which matches that category receive notification of those events. Filter expressions can include a wildcard match, indicated with an asterisk. The wildcard must be the right-most character in the expression. For example: rpc*, mx.*, or *. If an invalid expression is specified, a `InvalidFilterError` is thrown. If `null` or [] is specified, the filters are set to the default of ["*"].

For example:

                   var traceLogger:ILoggingTarget = new TraceTarget();
                   traceLogger.filters = ["mx.rpc.*", "mx.messaging.*"];
                   Log.addTarget(traceLogger);

Implementation
`public function get filters():Array`
`public function set filters(value:Array):void`

### id

property

`id:String` [read-only]

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

Provides access to the id of this target. The id is assigned at runtime by the mxml compiler if used as an mxml tag, or internally if used within a script block

Implementation
`public function get id():String`

### level

property

`level:int`

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

Provides access to the level this target is currently set at. Value values are:

- `LogEventLevel.FATAL (1000)` designates events that are very harmful and will eventually lead to application failure
- `LogEventLevel.ERROR (8)` designates error events that might still allow the application to continue running.
- `LogEventLevel.WARN (6)` designates events that could be harmful to the application operation
- `LogEventLevel.INFO (4)` designates informational messages that highlight the progress of the application at coarse-grained level.
- `LogEventLevel.DEBUG (2)` designates informational level messages that are fine grained and most helpful when debugging an application.
- `LogEventLevel.ALL (0)` intended to force a target to process all messages.

Implementation
`public function get level():int`
`public function set level(value:int):void`
Constructor Detail

### AbstractTarget

()
Constructor

`public function AbstractTarget()`

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

Constructor.

Method Detail

### addLogger

()
method

`public function addLogger(logger:ILogger):void`

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

Sets up this target with the specified logger. This allows this target to receive log events from the specified logger.

Parameters

| `logger:ILogger` — The ILogger that this target should listen to.

### initialized

()
method

`public function initialized(document:Object, id:String):void`

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

Called after the implementing object has been created and all properties specified on the tag have been assigned.

Parameters

| `document:Object` — MXML document that created this object.
| `id:String` — Used by the document to refer to this object. If the object is a deep property on the document, id is null.

### logEvent

()
method

`public function logEvent(event:LogEvent):void`

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

This method handles a `LogEvent` from an associated logger. A target uses this method to translate the event into the appropriate format for transmission, storage, or display. This method will be called only if the event's level is in range of the target's level.

NOTE: Descendants must override this method to make it useful.

Parameters

| `event:LogEvent` — An event from an associated logger.

### removeLogger

()
method

`public function removeLogger(logger:ILogger):void`

Language Version: | ActionScript 3.0

Product Version: | Flex 3

Runtime Versions: | Flash Player 9, AIR 1.1

Stops this target from receiving events from the specified logger.

Parameters

| `logger:ILogger` — The ILogger that this target should ignore.

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Mon Apr 10 2017, 12:28 PM -07:00