Bug 126414 [Commands] handlers: Provide help context ids
For commands and handlers to replace actions, they need to be capable of providing help context identifiers. For an example, see OpenResourceHandler in org.eclipse.ui.ide. This help context id will need to be definable through XML and through code.
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/Command.java
final IExecutionListener listener = (IExecutionListener) listeners[i];
				listener.postExecuteFailure(getId(), e);
			}
		}
	}
	/**
	 * Notifies the execution listeners for this command that an execution has
	 * completed successfully.
	 * 
	 * @param returnValue
	 *            The return value from the command; may be <code>null</code>.
	 */
	private final void firePostExecuteSuccess(final Object returnValue) {
		
		if (DEBUG_COMMAND_EXECUTION) {
			Tracing.printTrace("COMMANDS", "execute" + Tracing.SEPARATOR 
					+ "success: id=" + getId() + "; returnValue=" 
					+ returnValue);
		}
		if (executionListeners != null) {
			final Object[] listeners = executionListeners.getListeners();
			for (int i = 0; i < listeners.length; i++) {
				final IExecutionListener listener = (IExecutionListener) listeners[i];
				listener.postExecuteSuccess(getId(), returnValue);
			}
		}
	}
	/**
	 * Notifies the execution listeners for this command that an attempt to
	 * execute is about to start.