You can configure Java Platform, Enterprise Edition (Java
EE) applications or stand-alone modules during deployment using the
DConfigBean class in the Java EE Application Deployment API specification
(JSR-88).
Before you begin
Deprecated feature: Application installation using the
Java EE Application Deployment API specification (JSR-88) was deprecated
in WebSphere® Application Server Version
8.0. Use another option to deploy applications to a server. The closest
option to using the Java EE Deployment API is using Java Management
Extensions (JMX) MBean programming. For information on deployment
options, see Ways to install enterprise applications or modules.
This topic assumes that you are deploying (installing) Java EE modules on an application server
provided by the product using the WebSphere Application Server support for JSR-88.
Read about the JSR-88 specification and using the DConfigBean class at http://java.sun.com/j2ee/tools/deployment/.
About this task
The DConfigBean class in JSR-88 provides JavaBeans-based
support for platform-specific configuration of J2EE applications
and modules during deployment. Your code can inspect DConfigBean instances
to get platform-specific configuration attributes. The DConfigBean
instances provided by WebSphere Application Server contain
a single attribute which has an array of java.util.Map objects. The
map entries contain configuration attributes, for which your code
can get and set values.
Procedure
-
Write code that installs Java EE modules on an application
server using JSR-88.
- Write code that accesses DConfigBeans generated by the
product during JSR-88 deployment. You (or a deployer) can then customize
the accessed DConfigBeans instances.
The following pseudocode
shows how a Java EE tool provider can get DConfigBean instance attributes
generated by the product during JSR-88 deployment and set values for
the attributes.
import javax.enterprise.deploy.model.*;
import javax.enterprise.deploy.spi.*;
{
DeploymentConfiguration dConfig = ___; // Get from DeploymentManager
DDBeanRoot ddRoot = ___; // Provided by J2EE tool
// Obtain root bean.
DConfigBeanRoot dcRoot = dConfig.getDConfigBeanRoot(dr);
// Configure DConfigBean.
configureDCBean (dcRoot);
}
// Get children from DConfigBeanRoot and configure each child.
method configureDCBean (DConfigBean dcBean)
{
// Get DConfigBean attributes for a given archive.
BeanInfo bInfo = Introspector.getBeanInfo(dcBean.getClass());
IndexedPropertyDescriptor ipDesc =
(IndexedPropertyDescriptor)bInfo.getPropertyDescriptors()[0];
// Get the 0th map.
int index = 0;
Map map = (Map)
ipDesc.getIndexedReadMethod().invoke
(dcBean, new Object[]{new Integer(index)});
while (map != null)
{
// Iterate over the map and set values for attributes.
// Set the map back into the DCBean.
ipDesc.getIndexedWriteMethod().invoke
(dcBean, new Object[]{new Integer(index), map});
// Get the next entry in the indexed property
map = (Map)
ipDesc.getIndexedReadMethod().invoke
(dcBean, new Object[]{new Integer(++index)});
}
}