MuleContextExpressionEvaluator (Mule ESB 2.2.1 API)
Keywords: org.mule.expression.MuleContextExpressionEvaluator class

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## org.mule.expression
Class MuleContextExpressionEvaluator

    java.lang.Object
      org.mule.expression.MuleContextExpressionEvaluator

All Implemented Interfaces:
  ExpressionEvaluator, NamedObject

    public class MuleContextExpressionEvaluator

extends Object
implements ExpressionEvaluator

This property extractor exposes mule context information as expressions. This can be context information about the server itself such as the server id or about the current request such as the current service name.

- serviceName - returns the name of the service currently processing the event.
- modelName - returns the name of the model that hosts the current service
- inboundEndpoint - returns the URI string of the endpoint that received the current messgae.
- serverId - the Mule instance server Id.
- clusterId - the Mule instance cluster Id.
- domainId - the Mule instance domain Id.
- workingDir - Mule's working directory.
- homeDir - Mule's home directory

Field Summary
`static String` | `NAME`

Constructor Summary
`MuleContextExpressionEvaluator()`

Method Summary
`Object` | `evaluate(String expression, MuleMessage message)` Extracts a single property from the message
`protected MuleEventContext` | `getEventContext()`
`protected MuleContext` | `getMuleContext()`
`String` | `getName()` Gts the name of the object
`void` | `setName(String name)` Sets the name of the object

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### NAME

    public static final String NAME

See Also:
  Constant Field Values

Constructor Detail

### MuleContextExpressionEvaluator

    public MuleContextExpressionEvaluator()

Method Detail

### evaluate

    public Object evaluate(String expression,
                           MuleMessage message)

  Extracts a single property from the message

  Specified by:
    `evaluate` in interface `ExpressionEvaluator`
  Parameters:
    `expression` - the property expression or expression
    `message` - the message to extract from
  Returns:
    the result of the extraction or null if the property was not found

### getMuleContext

    protected MuleContext getMuleContext()

### getEventContext

    protected MuleEventContext getEventContext()

### getName

    public String getName()

  Gts the name of the object

  Specified by:
    `getName` in interface `NamedObject`
  Returns:
    the name of the object

### setName

    public void setName(String name)

  Sets the name of the object

  Specified by:
    `setName` in interface `NamedObject`
  Parameters:
    `name` - the name of the object

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