Preparing the custom PDP bundle

Procedure

The interface for the PDP customization is included to the following tesb-xacml-pdp-api bundle:

package org.talend.esb.authorization.xacml.pdp.api;
import javax.xml.transform.Source;
/**
 * An interface that describes a PolicyDecisionPoint (PDP).
 */
public interface PolicyDecisionPoint {
    
    /**
     * Evaluate an XACML Request and return a Response
     * @param request an XACML Request as a Source
     * @return the XACML Response as a Source
     */
    Source evaluate(Source request);
    
}

So first of all, make sure this bundle is installed and accessible.

The custom PDP bundle is an OSGi bundle which should import the authorization API resources and implement the org.talend.esb.authorization.xacml.pdp.api.PolicyDecisionPoint interface.
So, create this OSGi bundle via Maven.

Import the ESB XACML PDP API as a dependency to the Maven pom.xml:

<dependency>
    <groupId>org.talend.esb.authorization</groupId>
    <artifactId>tesb-xacml-pdp-api</artifactId>
    <version>${project.version}</version>
    <scope>compile</scope>
</dependency>

When using Spring for the description and rendering of the beans for the PDP implementation, create the beans.xml file in src/main/resources/META-INF/spring if it not exist, and add the PDP interface implementation. For example:
```
<bean id="pdpBean" class="org.talend.esb.authorization.xacml.pdp.herasaf.HerasAFPolicyDeci
sionPoint">
...........
</bean>
```
The HerasAFPolicyDecisionPoint class mentioned in the example above should implement the PolicyDecisionPoint interface.

<osgi:service ref="pdpBean" interface="org.talend.esb.authorization.xacml.pdp.api.PolicyDecisionPoi
nt"/>

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