How to get service and PE for any user?
I have user details and I want to the services and exchange codes he is entitled to. How to achieve it?
Hello @Ashish Gupta,
In Developer Guide for your language option, for example OpenDacs - Java Development Guides look up AuthorizationAgent -> getPEList().
If you are just starting with OpenDACS I would suggest to first work through OpenDACS QuickStart Guide and OpenDACS Tutorials (I include likes to Java, the exact same materials can be found in C++ and .Net),
as together, these materials give a working understanding of the fundamentals of OpenDACS API.
Hope this helps
Hello @Ashish Gupta
You can modify DacsSubscribeClient.java to get the list of services on DACS as example snipped source code below:
private Vector<AuthorizationServiceAttributes> _getServiceAttributes() {
try {
// AuthorizableServiceAttributes is an instance for keeping
// attributes information of an authorizable service.
Vector<AuthorizationServiceAttributes> services = new Vector<AuthorizationServiceAttributes>();
/*
* Pass the vector of AuthorizableServiceAttribute instances as
* a parameter of the AuthorizationAgent's getServiceAttributes()
* method.It will be pushed the attributes of all authorizable
* services within that method.
*/
AuthorizationCheckResult authCheckResult = _agent.getServiceAttributes(services);
// Check the result of calling the getServiceAttributes() method.
if (authCheckResult == AuthorizationCheckResult.ACCESS_ALLOWED) {
// Calling the method success.
return services;
} else {
// Calling the method failed, return null.
return null;
}
} catch (AuthorizationException ae) {
System.err.println("AuthorizationAgent.getServiceAttributes() failed");
return null;
}
}
Then, check if the user is entitled to each service.
public void checkAuthorizableServices() {
Vector<AuthorizationServiceAttributes> services = _getServiceAttributes();
if (services != null) {
System.out.println("Connected DACS server has " + services.size()
+ " authorizable service(s)");
for (int i = 0; i < services.size(); i++) {
AuthorizationServiceAttributes attrs = services.get(i);
System.out.println("#" + (i + 1) + "#");
System.out.println(" Service ID: "
+ attrs.getServiceId());
System.out.println(" Service Name: "
+ attrs.getServiceName());
System.out.println(" Service Type: "
+ attrs.getServiceType());
System.out.println(" Service Qos: "
+ attrs.getServiceQoS());
AuthorizationCheckStatus authCheckStatus = new AuthorizationCheckStatus();
try {
AuthorizationCheckResult authCheckResult = _agent.checkSubscription(_handle, _usage, _reqtype,
authCheckStatus,services.get(i).getServiceName());
if (authCheckResult == AuthorizationCheckResult.ACCESS_ALLOWED) {
System.out.println("[" + _daemonHost + "] " + _name +
" allowed subscription access to service " + services.get(i).getServiceName());
}
else {
System.out.println("[" + _daemonHost + "] " + _name +
" denied subscription access to service " + services.get(i).getServiceName());
System.out.println("status message - " +
authCheckStatus.getStatusText());
}
} catch (AuthorizationException ae) {
// In case the exception occurs during calling method.
System.err.println("[" + _daemonHost + "] " + _name +
" check subscription service " + services.get(i).getServiceName() +
" failed");
}
}
}
}
The example output:
