thoerup/circuitbreaker/AccountingCircuitBreaker.java

package dk.thoerup.circuitbreaker;

import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

public class AccountingCircuitBreaker extends CircuitBreaker {

        private AtomicInteger tripCount = new AtomicInteger(0); // how many times ahs the CB tripped  
        private AtomicInteger blockCount = new AtomicInteger(0); //how many times has this CB blocked a call that would otherwise go to the backend
        private AtomicInteger totalFailureCount = new AtomicInteger(0); //how many times has the backend thrown an exception
        private AtomicInteger totalCallCount = new AtomicInteger(0);
        private AtomicLong lastTrip = new AtomicLong(0);
        private AtomicLong lastFailure = new AtomicLong(0);
        private long lastResetCounters = 0;
        
        public AccountingCircuitBreaker(String name, int threshold, long timeoutMS) {
                super(name, threshold, timeoutMS);

                resetCounters();
        }

        @Override
        public Object invoke(CircuitInvocation invocation) throws Exception {
                Object result;
                try {
                        totalCallCount.incrementAndGet();
                        result = super.invoke(invocation);
                } catch (Exception e) {
                        if (e instanceof CircuitBreakerException) {
                                blockCount.incrementAndGet();
                        } else {
                                totalFailureCount.incrementAndGet();
                                lastFailure.set( System.currentTimeMillis() );
                        }
                        throw e;
                }
                
                return result;
        }

        @Override
        public void tripBreaker() {
                super.tripBreaker();
                tripCount.incrementAndGet();
                lastTrip.set( System.currentTimeMillis() );
        }
        
        public int getTripCount() {
                return tripCount.get();
        }
        
        public int getBlockCount() {
                return blockCount.get();        
        }
        
        public int getTotalFailureCount() {
                return totalFailureCount.get();
        }
        
        public long getLastResetCounters() {
                return lastResetCounters;
        }
        
        public long getLastTrip() {
                return lastTrip.get();
        }
        
        public long getLastFailure() {
                return lastFailure.get();
        }
        
        public int getTotalCallCount() {
                return totalCallCount.get();
        }
        
        public void resetCounters() {
                tripCount.set(0);
                blockCount.set(0);
                totalFailureCount.set(0);
                totalCallCount.set(0);
                lastTrip.set(0);
                lastFailure.set(0);
                
                lastResetCounters = System.currentTimeMillis();
        }
        
}
1	package dk.thoerup.circuitbreaker;
2
3	import java.util.concurrent.atomic.AtomicInteger;
4	import java.util.concurrent.atomic.AtomicLong;
5
6	public class AccountingCircuitBreaker extends CircuitBreaker {
7
8	private AtomicInteger tripCount = new AtomicInteger(0); // how many times ahs the CB tripped
9	private AtomicInteger blockCount = new AtomicInteger(0); //how many times has this CB blocked a call that would otherwise go to the backend
10	private AtomicInteger totalFailureCount = new AtomicInteger(0); //how many times has the backend thrown an exception
11	private AtomicInteger totalCallCount = new AtomicInteger(0);
12	private AtomicLong lastTrip = new AtomicLong(0);
13	private AtomicLong lastFailure = new AtomicLong(0);
14	private long lastResetCounters = 0;
15
16	public AccountingCircuitBreaker(String name, int threshold, long timeoutMS) {
17	super(name, threshold, timeoutMS);
18
19	resetCounters();
20	}
21
22	@Override
23	public Object invoke(CircuitInvocation invocation) throws Exception {
24	Object result;
25	try {
26	totalCallCount.incrementAndGet();
27	result = super.invoke(invocation);
28	} catch (Exception e) {
29	if (e instanceof CircuitBreakerException) {
30	blockCount.incrementAndGet();
31	} else {
32	totalFailureCount.incrementAndGet();
33	lastFailure.set( System.currentTimeMillis() );
34	}
35	throw e;
36	}
37
38	return result;
39	}
40
41	@Override
42	public void tripBreaker() {
43	super.tripBreaker();
44	tripCount.incrementAndGet();
45	lastTrip.set( System.currentTimeMillis() );
46	}
47
48	public int getTripCount() {
49	return tripCount.get();
50	}
51
52	public int getBlockCount() {
53	return blockCount.get();
54	}
55
56	public int getTotalFailureCount() {
57	return totalFailureCount.get();
58	}
59
60	public long getLastResetCounters() {
61	return lastResetCounters;
62	}
63
64	public long getLastTrip() {
65	return lastTrip.get();
66	}
67
68	public long getLastFailure() {
69	return lastFailure.get();
70	}
71
72	public int getTotalCallCount() {
73	return totalCallCount.get();
74	}
75
76	public void resetCounters() {
77	tripCount.set(0);
78	blockCount.set(0);
79	totalFailureCount.set(0);
80	totalCallCount.set(0);
81	lastTrip.set(0);
82	lastFailure.set(0);
83
84	lastResetCounters = System.currentTimeMillis();
85	}
86
87	}