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package org.wso2.carbon.registry.samples.notifications;
 
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.xpath.AXIOMXPath;
import org.apache.axiom.soap.SOAPEnvelope;
import org.apache.axis2.AxisFault;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.engine.Handler;
import org.apache.axis2.handlers.AbstractHandler;
import org.apache.axis2.transport.mail.MailConstants;
import org.jaxen.JaxenException;
 
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;
 
public class EmailTransformHandler extends AbstractHandler implements Handler {
    private String[] blacklist = {"john@smith.com", "joe@bloggs.co.uk"};
    private String name;
 
    public String getName() {
        return name;
    }
 
    public InvocationResponse invoke(MessageContext msgContext) throws AxisFault {
        String address = msgContext.getTo().getAddress();
        if (msgContext.getTo() != null && address.startsWith("mailto:")) {
            try {
                SOAPEnvelope envelope = msgContext.getEnvelope();
                AXIOMXPath xPath = new AXIOMXPath("//ns:text");
                xPath.addNamespace("ns", "http://ws.apache.org/commons/ns/payload");
                OMElement element = (OMElement) ((ArrayList) xPath.evaluate(envelope)).get(0);
                if (restrict(msgContext, address, element)) {
                    return InvocationResponse.ABORT;
                }
                element.setText(element.getText().replace("--", "This message was intercepted by " +
                        "EmailTransformHandler\n--"));
            } catch (JaxenException e) {
                e.printStackTrace();
            }
        }
        return InvocationResponse.CONTINUE;
    }
 
    private boolean restrict(MessageContext msgContext, String address, OMElement element) {
        final String checkItem = "Smoke Test Passed";
        final String state = "Testing";
        String subject = ((Map<String, String>) msgContext.getOptions().getProperty(
                MessageContext.TRANSPORT_HEADERS)).get(MailConstants.MAIL_HEADER_SUBJECT);
        return (subject.contains("CheckListItemChecked") && element.getText().contains(
                "CheckList item '" + checkItem + "' of LifeCycle State '" + state + "' was") &&
                Arrays.binarySearch(blacklist, address.substring("mailto:".length())) >= 0);
    }
 
    public void revoke(MessageContext msgContext) {
    }
 
    public void setName(String name) {
        this.name = name;
    }
}

In this example we have used the default ServiceLifeCycle we have made the restriction for the event triggered by checking of the Smoke Test Passed checklist item of the Testing state. We have assumed that the Promote button which takes you to the Production state will be restricted to the role to which John Doe belongs. For this to work the Transition Permissions must be properly set.

We have also assumed that the Smoke Test Passed checklist item will be the last to be checked in the Testing state and that the immediate next step would be the promotion to the Production state. Because only some users belonging to a particular role will get the option to promote, it is required to keep the corresponding users informed, but not spam the others. This can be done by subscribing all users and blacklisting the ones who do not require receiving the e-mails. See below to learn how to subscribe all users for the Check LC Item event.

Image Added

For this to work, each user should fill out their User Profile.