4. Available Implicit Variables in the JBoss ON API

In the Java programming language, classes in the java.lang package do not have to be imported; they are automatically made available. Classes in other packages, however, have to be explicitly imported.

In the JBoss ON CLI, there are a number of classes, particularly from the domain API, that are used routinely. To simplify using the JBoss ON CLI, everything under the org.rhq.core.domain class is automatically imported, which makes it easier to use the CLI for managing resources, alerts, and other configuration areas. For example, the class org.rhq.core.domain.criteria.ResourceCriteria is commonly used to query resources. The entire class path can be given when calling that class:

var criteria = new org.rhq.core.domain.criteria.ResourceCriteria();
var resource = new org.rhq.core.domain.resource.Resource();

var criteria = new org.rhq.core.domain.criteria.ResourceCriteria();
var resource = new org.rhq.core.domain.resource.Resource();

Because the domain class is already imported, this can be more succinctly written as:

var criteria = new ResourceCriteria();
var resource = new Resource();

var criteria = new ResourceCriteria();
var resource = new Resource();

Common variables used with the CLI scripts are listed in Table 2, “Variables Available by Default to the JBoss ON CLI”. Methods and other information about these variables are in Section 5, “Methods Specific to the JBoss ON CLI”.