circuitbreaker/jmx/JMXWrapper.java

package dk.thoerup.circuitbreaker.jmx;

import java.lang.management.ManagementFactory;
import java.util.Set;
import java.util.TreeSet;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.management.MBeanServer;
import javax.management.ObjectName;

import dk.thoerup.circuitbreaker.AccountingCircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;

public class JMXWrapper {
        static Logger logger = Logger.getLogger(JMXWrapper.class.getName());
        
        private static Set<ObjectName> objectNames = new TreeSet<ObjectName>();
        
        
        public static ObjectName registerCircuitBreaker(CircuitBreaker cb) {
                Object jmxBean;
                String className;
                
                if (cb instanceof AccountingCircuitBreaker) {
                        jmxBean = new JmxAccountingCircuitBreaker((AccountingCircuitBreaker)cb);
                        className = "AccountingCircuitBreaker";                 
                } else {
                        jmxBean = new JmxCircuitBreaker(cb);
                        className = "CircuitBreaker";                   
                }
                
                String name = cb.getName();
                
                try {
                        
                        ObjectName beanName = new ObjectName("dk.thoerup.circuitbreaker:type=" + className + ",name=" + name);
                        
                        MBeanServer server = ManagementFactory.getPlatformMBeanServer();
                        if (server.isRegistered(beanName))
                                server.unregisterMBean(beanName);
                        server.registerMBean(jmxBean, beanName);
                        objectNames.add(beanName);
                        return beanName;
                        
                } catch (Exception e) {
                        logger.log(Level.SEVERE, "Mbean failure",e );
                        return null;
                }
        }
        
        public static void registerAllCircuitBreakers() {
                CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
                
                for (String cbName : mgr.getCircuitBreakerNames()) {
                        CircuitBreaker cb = mgr.getCircuitBreaker(cbName);
                        registerCircuitBreaker(cb);
                }
        }
        
        public static void unregisterAllCircuitBreakers() {
                MBeanServer server = ManagementFactory.getPlatformMBeanServer();
                
                for (ObjectName objName : objectNames) {
                        if (server.isRegistered(objName)) {
                                try {
                                        server.unregisterMBean(objName);
                                } catch (Exception e) {
                                        //At this point we don't care why it wasn't in the system - all that matter is that it's gone
                                }
                        }
                }
        }
}
1	torben	467	package dk.thoerup.circuitbreaker.jmx;
2	torben	402
3			import java.lang.management.ManagementFactory;
4	torben	408	import java.util.Set;
5			import java.util.TreeSet;
6	torben	402	import java.util.logging.Level;
7			import java.util.logging.Logger;
8
9			import javax.management.MBeanServer;
10			import javax.management.ObjectName;
11
12	torben	467	import dk.thoerup.circuitbreaker.AccountingCircuitBreaker;
13			import dk.thoerup.circuitbreaker.CircuitBreaker;
14			import dk.thoerup.circuitbreaker.CircuitBreakerManager;
15	torben	402
16			public class JMXWrapper {
17			static Logger logger = Logger.getLogger(JMXWrapper.class.getName());
18
19	torben	408	private static Set<ObjectName> objectNames = new TreeSet<ObjectName>();
20
21
22	torben	1154	public static ObjectName registerCircuitBreaker(CircuitBreaker cb) {
23	torben	402	Object jmxBean;
24			String className;
25
26			if (cb instanceof AccountingCircuitBreaker) {
27			jmxBean = new JmxAccountingCircuitBreaker((AccountingCircuitBreaker)cb);
28			className = "AccountingCircuitBreaker";
29			} else {
30			jmxBean = new JmxCircuitBreaker(cb);
31			className = "CircuitBreaker";
32			}
33
34			String name = cb.getName();
35	torben	408
36	torben	402	try {
37
38	torben	405	ObjectName beanName = new ObjectName("dk.thoerup.circuitbreaker:type=" + className + ",name=" + name);
39	torben	402
40			MBeanServer server = ManagementFactory.getPlatformMBeanServer();
41			if (server.isRegistered(beanName))
42			server.unregisterMBean(beanName);
43			server.registerMBean(jmxBean, beanName);
44	torben	408	objectNames.add(beanName);
45	torben	1154	return beanName;
46	torben	402
47			} catch (Exception e) {
48			logger.log(Level.SEVERE, "Mbean failure",e );
49	torben	1154	return null;
50	torben	402	}
51	torben	406	}
52
53			public static void registerAllCircuitBreakers() {
54			CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
55	torben	402
56	torben	406	for (String cbName : mgr.getCircuitBreakerNames()) {
57			CircuitBreaker cb = mgr.getCircuitBreaker(cbName);
58			registerCircuitBreaker(cb);
59			}
60	torben	402	}
61	torben	408
62			public static void unregisterAllCircuitBreakers() {
63			MBeanServer server = ManagementFactory.getPlatformMBeanServer();
64
65			for (ObjectName objName : objectNames) {
66			if (server.isRegistered(objName)) {
67			try {
68			server.unregisterMBean(objName);
69			} catch (Exception e) {
70			//At this point we don't care why it wasn't in the system - all that matter is that it's gone
71			}
72			}
73			}
74			}
75	torben	402	}