Status Handlers

Identifier:
org.eclipse.ui.statusHandlers

Since:
3.3

Description:

This extension point is used to register implementations of status handlers in the workbench. A handler can be associated with a product and this association is also contributed via this extension point.

Status handlers are part of the status handling facility. The facility is responsible for handling errors and other important issues in Eclipse based applications. The handlers are responsible for presenting this errors by logging or showing error dialogs.

If there is no status handler associated with a product, the status handling facility uses the application handler defined in a workbench advisor.

Configuration Markup:

<!ELEMENT extension (statusHandler* , statusHandlerProductBinding*)>

<!ATTLIST extension

point CDATA #REQUIRED

id    CDATA #IMPLIED

name  CDATA #IMPLIED>


<!ELEMENT statusHandler (parameter*)>

<!ATTLIST statusHandler

id    CDATA #REQUIRED

class CDATA #REQUIRED>

This element is used to define a status handler.



<!ELEMENT parameter EMPTY>

<!ATTLIST parameter

name  CDATA #REQUIRED

value CDATA #REQUIRED>

This element defines parameters for instances of specified status handler class. Instances of specified status handler class should understand this parameter.

Handling policies can use handler parameters. For example default policy use handlers "prefix" parameter. The default policy looks for the most specific handler for given status checking status pluginId against these prefixes.



<!ELEMENT statusHandlerProductBinding EMPTY>

<!ATTLIST statusHandlerProductBinding

productId CDATA #REQUIRED

handlerId CDATA #REQUIRED>

Specifies a binding between a product and a status handler. These bindings determine which handler is appropriate for the current product (as defined by org.eclipse.core.runtime.Platform.getProduct()).



Examples:

The following is an example of the definition for handler with prefix parameter.


<extension
 point="org.eclipse.ui.statusHandlers">
 <statusHandler
 class="org.eclipse.ui.statushanders.SampleStatusHandler"
 id="sampleStatusHandler">
  <parameter
  name="prefix"
  value="org.eclipse.ui.ide">
  </parameter>
 </statusHandler>
</extension>

The following is an example of the definition for default (product) handler. The handler defined in the example will be default for product with id "productId".


<extension
 point="org.eclipse.ui.statusHandlers">
 <statusHandler
 class="org.eclipse.ui.statushandlers.SampleStatusHandler"
 id="sampleStatusHandler">
 </statusHandler>
 <statusHandlerProductBinding
 handlerId="sampleStatusHandler"
 productId="productId">
 </statusHandlerProductBinding>
</extension>

Of course we can define only the binding (for instance in a product plugin). The handler can be defined in other plugin.


<extension
 point="org.eclipse.ui.statusHandlers">
 <statusHandlerProductBinding
 handlerId="sampleStatusHandler"
 productId="productId">
 </statusHandlerProductBinding>
</extension>

API Information:

The value of the class attribute in statusHandler element must be the fully qualified name of a class that extends org.eclipse.ui.statushandlers.AbstractStatusHandler.

The parameter elements in statusHandler element adds parameters which can be used during handling in the status handler defined in class attribute.

The value of the productId attribute in statusHandlerProductBinding is full name of the product to which the handler with id defined in handlerId attribute in statusHandlerProductBinding will be associated.

Supplied Implementation:

The platform supplies basic implementation of org.eclipse.ui.statushandlers.AbstractStatusHandler. It is org.eclipse.ui.statushandlers.WorkbenchErrorHandler which is the default workbench status handler.


Copyright (c) 2006, 2011 IBM Corporation and others.
All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html