Modify nested attributes using the wsadmin scripting tool

We can modify nested attributes for a configuration object using scripting and the wsadmin tool.

The attributes for a WebSphere Application Server configuration object are often deeply nested. For example, a JDBCProvider object has an attribute factory, which is a list of the J2EEResourceFactory type objects. These objects can be DataSource objects that contain a connectionPool attribute with a ConnectionPool type containing a variety of primitive attributes.

Tasks

1. Invoke the AdminConfig object commands interactively, or in a script, from an operating system command prompt.

   See the topic on starting the wsadmin scripting client.

2. Obtain the configuration ID of the object, for example:

   Use Jacl:

   set t1 [$AdminConfig getid /DataSource:TechSamp/]
   

   Use Jython:

   t1=AdminConfig.getid('/DataSource:TechSamp/')
   

   Element	Description
   set	Jacl command
   t1	Variable name
   $	Jacl operator for substituting a variable name with its value
   AdminConfig	is an object representing the product configuration
   getid	AdminConfig command
   DataSource	is the object type
   TechSamp	is the name of the object that will be modified

3. Modify one of the object parents and specify the location of the nested attribute within the parent, for example:

   Use Jacl:

   $AdminConfig modify $t1 {{connectionPool {{reapTime 2003}}}}
   

   Use Jython list:

   AdminConfig.modify(t1, [["connectionPool", [["reapTime", 2003]]]])
   

   Use Jython string:

   AdminConfig.modify(t1, '[[connectionPool [[reapTime 2003]]]]')
   

   Element	Description
   $	Jacl operator for substituting a variable name with its value
   AdminConfig	object representing the WAS configuration
   modify	n AdminConfig command
   t1	Evaluate to the configuration ID of the datasource in step number 2
   connectionPool	Attribute
   reapTime	nested attribute within the connectionPool attribute
   2003	Value of the reapTime attribute

4. Save the configuration by issuing an AdminConfig save command. For example:

   Use Jacl:

   $AdminConfig save
   

   Use Jython:

   AdminConfig.save()
   

   Use the reset command of the AdminConfig object to undo changes that we made to your workspace since your last save.

Example

An alternative way to modify nested attributes is to modify the nested attribute directly.

Use Jacl:

set techsamp [$AdminConfig getid /DataSource:TechSamp/]
set pool [$AdminConfig showAttribute $techsamp connectionPool]
$AdminConfig modify $pool {{reapTime 2003}}

Use Jython list:

techsamp=AdminConfig.getid('/DataSource:TechSamp/')
pool=AdminConfig.showAttribute(techsamp,'connectionPool')
AdminConfig.modify(pool,[['reapTime',2003]])

Use Jython string:

techsamp=AdminConfig.getid('/DataSource:TechSamp/')
pool=AdminConfig.showAttribute(techsamp,'connectionPool')
AdminConfig.modify(pool,'[[reapTime 2003]]')

In this example, the first command gets the configuration id of the DataSource, and the second command gets the connectionPool attribute. The third command sets the reapTime attribute on the ConnectionPool object directly.

Start the wsadmin scripting client