You can write an activity with java step. See sample code below - you should also know that SMA has been deprecated in Pega 8.x, the modern way of accessing similar information is through Admin Studio and Pega REST API.

1. try  
2.   {  
3.         String host = "host";  
4.         int port = 9999;  // management-native port  
5.         String urlString ="service:jmx:remoting-jmx://" + host + ":" + port;  
6.         System.out.println("\n\n\t****  urlString: "+urlString);;  
7.         javax.management.remote.JMXServiceURL serviceURL = new javax.management.remote.JMXServiceURL(urlString);  
8.   
9.         java.util.Map map = new java.util.HashMap();  
10.         String[] credentials = new String[] { "user", "password" };  
11.         map.put("jmx.remote.credentials", credentials);  
12.         javax.management.remote.JMXConnector jmxConnector = javax.management.remote.JMXConnectorFactory.connect(serviceURL, map);  
13.         javax.management.MBeanServerConnection connection = jmxConnector.getMBeanServerConnection();  
14.   
15.     // Quick way to execute getNodes mBean      
16.     ObjectName oname = new ObjectName("com.pega.pegarules.management.internal.ListenerManagement");    
17.       String result = (String) connection.invoke(oname, "getNodes", new Object[0], new String[0]);      
18.     // result is XML. Parse it yourself  
19.       
20.       
21.         // Longer exercise to walk through all domains, all names, and operations within  
22.         int count = connection.getMBeanCount();  
23.         System.out.println("Total MBean count:" + count);  
24.         // Get domain list  
25.         String[] domains = connection.getDomains();  
26.         for (String domain: domains)  
27.           System.out.println("Domain: " + domain);  
28.   
29.         // Get list of object names  
30.         Set<javax.management.ObjectName> names = connection.queryNames(null,null);  
31.         for (javax.management.ObjectName name:names)  
32.         {  
33.           if (name.getDomain().contains("com.pega"))  
34.           {  
35.              System.out.println("ObjectName: " + name);  
36.             javax.management.MBeanInfo info = connection.getMBeanInfo(name);  
37.             for (javax.management.MBeanOperationInfo operation : info.getOperations()) {  
38.                  System.out.println("operations: "+operation.getName());  
39.                  // invoking an operation for NodeManagement mBean  
40.                  if (operation.getName().equals("getNodes"))  
41.                    {  
42.                      System.out.println("invoking: " + name + "operation: " + operation.getName());  
43.                      System.out.println(connection.invoke(name, operation.getName(),new Object[0],new String[0]));  
44.                  }  
45.   
46.            }           
47.           }  
48.         }  
49.        
50.   
51.         jmxConnector.close();  
52.     } catch (Exception e)  
53.     {  
54.         System.out.println("Caught exception: " + e);  
55.        
56.     }