Using dynamic alias name inside wso2:vault-lookup in WSO2 ESB 5.0.0

Below is a sample proxy service to use dynamic alias names inside wso2:vault-lookup.

<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="UsingDynamicAlias"
       startOnLoad="true"
       statistics="disable"
       trace="disable"
       transports="https,http">
   <target>
      <inSequence>
         <log level="custom">
            <property name="STATUS"
                      value="------------------UsingDynamicAlias Proxy Invoked-----------------"/>
         </log>
         <property name="alias_name" value="testAlias"/>
         <log>
            <property expression="wso2:vault-lookup(get-property('alias_name'))"
                      name="secured_password"/>
         </log>
      </inSequence>
   </target>
   <description/>
</proxy>
                                

The Result Log:

[2017-01-13 21:50:27,121]  INFO - ProxyService Successfully created the Axis2 service for Proxy service : UsingDynamicAlias
[2017-01-13 21:52:13,071]  INFO - LogMediator STATUS = ------------------UsingDynamicAlias Proxy Invoked-----------------
[2017-01-13 21:52:13,106]  INFO - DependencyTracker Local entry : conf:/repository/components/secure-vault was added to the Synapse configuration successfully
[2017-01-13 21:52:13,109]  INFO - LogMediator To: /services/UsingDynamicAlias.UsingDynamicAliasHttpSoap11Endpoint, WSAction: urn:mediate, SOAPAction: urn:mediate, MessageID: urn:uuid:989b03ef-55e1-49ff-9942-1dab202edfe5, Direction: request, secured_password = ajanpassword