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 AtomicLong lastReset = 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() );
        }
        
        
        
        @Override
        public void reset() {
                super.reset();
                lastReset.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 long getLastReset() {
                return lastReset.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);
                lastReset.set(0);
                lastFailure.set(0);
                
                lastResetCounters = System.currentTimeMillis();
        }
        
}
1	torben	467	package dk.thoerup.circuitbreaker;
2	torben	399
3			import java.util.concurrent.atomic.AtomicInteger;
4	torben	460	import java.util.concurrent.atomic.AtomicLong;
5	torben	399
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	torben	403	private AtomicInteger totalFailureCount = new AtomicInteger(0); //how many times has the backend thrown an exception
11			private AtomicInteger totalCallCount = new AtomicInteger(0);
12	torben	624
13	torben	460	private AtomicLong lastTrip = new AtomicLong(0);
14	torben	621	private AtomicLong lastFailure = new AtomicLong(0);
15	torben	624	private AtomicLong lastReset = new AtomicLong(0);
16
17	torben	404	private long lastResetCounters = 0;
18	torben	400
19	torben	399	public AccountingCircuitBreaker(String name, int threshold, long timeoutMS) {
20			super(name, threshold, timeoutMS);
21	torben	444
22			resetCounters();
23	torben	399	}
24
25			@Override
26	torben	450	public Object invoke(CircuitInvocation invocation) throws Exception {
27	torben	399	Object result;
28			try {
29	torben	403	totalCallCount.incrementAndGet();
30	torben	399	result = super.invoke(invocation);
31	torben	450	} catch (Exception e) {
32			if (e instanceof CircuitBreakerException) {
33	torben	399	blockCount.incrementAndGet();
34			} else {
35	torben	403	totalFailureCount.incrementAndGet();
36	torben	621	lastFailure.set( System.currentTimeMillis() );
37	torben	399	}
38	torben	450	throw e;
39	torben	399	}
40
41			return result;
42			}
43
44			@Override
45			public void tripBreaker() {
46			super.tripBreaker();
47			tripCount.incrementAndGet();
48	torben	460	lastTrip.set( System.currentTimeMillis() );
49	torben	399	}
50
51	torben	624
52
53			@Override
54			public void reset() {
55			super.reset();
56			lastReset.set( System.currentTimeMillis());
57			}
58
59	torben	399	public int getTripCount() {
60			return tripCount.get();
61			}
62
63			public int getBlockCount() {
64			return blockCount.get();
65			}
66
67	torben	403	public int getTotalFailureCount() {
68			return totalFailureCount.get();
69	torben	399	}
70
71	torben	404	public long getLastResetCounters() {
72			return lastResetCounters;
73	torben	400	}
74
75	torben	460	public long getLastTrip() {
76			return lastTrip.get();
77			}
78
79	torben	621	public long getLastFailure() {
80			return lastFailure.get();
81			}
82
83	torben	624	public long getLastReset() {
84			return lastReset.get();
85			}
86
87	torben	403	public int getTotalCallCount() {
88			return totalCallCount.get();
89			}
90
91	torben	399	public void resetCounters() {
92			tripCount.set(0);
93			blockCount.set(0);
94	torben	403	totalFailureCount.set(0);
95			totalCallCount.set(0);
96	torben	460	lastTrip.set(0);
97	torben	624	lastReset.set(0);
98	torben	621	lastFailure.set(0);
99	torben	400
100	torben	404	lastResetCounters = System.currentTimeMillis();
101	torben	399	}
102
103			}