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Class examples.workspace.monitor.RangeMonitor 

java.lang.Object
   |
   +----examples.workspace.monitor.RangeMonitor
public class RangeMonitor
extends Object
implements SetMonitor
This code example shows how a Workspace Monitor can be used to restrict a workspace value to a particular range. In this class, we implement the preSet() and postSet() methods from the SetMonitor interface, and actually carry out the work in the preSet() method, where we check the type of a value before it is saved.

To set up this example:

  1. Set up your development shell as described in Setting up your environment.

  2. Compile this example by executing the following command in your development shell:

    $ javac -d %SERVER_CLASSES% RangeMonitor.java

  3. You do not execute this example directly; it is called by the MonitorDemo class. You must compile all the other examples in this package before running MonitorDemo.

Author:
Copyright (c) 1997-2000 by BEA Systems, Inc. All Rights Reserved.

Constructor Index

o RangeMonitor()

Method Index

o monitorInit(ParamSet, boolean)
Initializes a monitor.
o postSet(Setable, ParamSet, Exception)
Implement this method to carry out some arbitrary operations after the target object's set() method is called.
o preSet(Setable, ParamSet)
Implement this method to carry out some arbitrary operations before the target object's set() method is called.
o setServices(T3ServicesDef)
Sets the services stub for this class.

Constructors

o RangeMonitor 
 public RangeMonitor()

Methods

o monitorInit 
 public void monitorInit(ParamSet params,
                         boolean isMaster)
Initializes a monitor. This allows passing of initialization parameters even when the object is instantiated remotely on the WebLogic Server with a default constructor (which cannot have arguments).

Parameters:
params - ParamSet of initialization values
isMaster - true if this is a Master Monitor
Throws: ParamSetException
if the Monitor cannot be initialized or there is a problem with the ParamSet
o setServices 
 public void setServices(T3ServicesDef services)
Sets the services stub for this class. It allows you to write a class that can be instantiated by a client or a WebLogic Server -- how this class accesses WebLogic services is determined by the services stub, which is set at runtime.

o preSet 
 public void preSet(Setable target,
                    ParamSet callbackData) throws MonitorException
Implement this method to carry out some arbitrary operations before the target object's set() method is called. The target object must implement the weblogic.common.Setable interface. Here we check the range of a value before it is set, and throw a MonitorException to veto the set operation if the value is out of range.

Parameters:
target - Object to be set
callbackData - ParamSet of potential data for callback
Throws: MonitorException
if a Monitor vetoes the operation
o postSet 
 public void postSet(Setable target,
                     ParamSet callbackData,
                     Exception e)
Implement this method to carry out some arbitrary operations after the target object's set() method is called. The target object must implement the weblogic.common.Setable interface.

Parameters:
target - Object to be set
callbackData - ParamSet of potential data for callback
e - Exception to be thrown if the monitor is vetoed or does not complete 
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